San Marcos City Council
February 25, 2025

APPENDIX E
EXISTING JUNCTIONS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 120 of 132 April 2019 Facility ID Sub
Watershed
Original
Facility ID Type
Invert
Elevation
(feet)
Rim
Elevation
(feet)
Depth
(feet)
Max.

HGL
(2-year)
(feet)
Max.

Lateral
Inflow
(2-year)
(cfs)
Max.

Total
Inflow
(2-year)
(cfs)
Surcharging
(2-year)
Max. HGL
(10-year)
(feet)
Max.

Lateral
Inflow
(10-year)
(cfs)
Max.

Total
Inflow
(10-year)
(cfs)
Surcharging
(10-year)
Max. HGL
(50-year)
(feet)
Max.

Lateral
Inflow
(50-year)
(cfs)
Max. Total
Inflow
(50-year)
(cfs)
Surcharging
(50-year)
Max. HGL
(100-year)
(feet)
Max.

Lateral
Inflow
(100-year)
(cfs)
Max. Total
Inflow
(100-year)
(cfs)
Surcharging
(100-year)
Existing Condition Junctions Summary table
Dimensions 2-year 10-year 50-year 100-year
OTHR11495 C ZOTHER10313Other 495.5 510.4 14.9 498.6 8.4 55.3 NO 499.8 14.3 101.7 NO 510.6 21.6 160.3 NO 511.1 24.6 201.9 NO INLT10846 C ZINL12602 Inlet 594.1 600.8 6.8 594.1 0.0 0.0 NO 594.1 0.0 0.0 NO 594.1 0.0 0.0 NO 594.1 0.0 0.0 NO OTLT10228 C ZOUT10024 Outlet 583.8 596.1 12.3 583.8 0.0 0.0 NO 583.8 0.0 0.0 NO 583.8 0.0 0.0 NO 583.8 0.0 0.0 NO INLT10847 C INL075 Inlet 524.3 530.1 5.9 524.9 5.3 7.3 NO 525.2 8.8 12.6 NO 525.5 13.0 19.1 NO 525.7 14.8 21.8 NO CLEN11452 C ZCO10557 Cleanout 517.8 523.4 5.6 518.4 1.6 8.5 NO 518.6 2.5 14.4 NO 518.8 3.7 21.4 NO 518.9 4.1 23.5 NO CLEN11453 C ZCO11059 Cleanout 469.1 477.8 8.6 470.3 7.2 47.0 NO 470.7 12.7 83.8 NO 471.1 19.4 119.5 NO 471.3 22.2 131.3 NO CBIN11767 C CI0008 Curb Inlet 492.3 498.8 6.4 493.3 0.0 40.5 NO 493.6 0.0 72.1 NO 493.9 0.0 100.9 NO 493.9 0.0 110.1 NO INLT10848 C INL074 Inlet 542.3 549.1 6.8 543.3 3.4 17.9 NO 543.7 5.6 33.1 NO 546.3 8.3 50.1 NO 548.5 9.4 57.3 NO CLEN11454 C ZCO12074 Cleanout 450.7 458.6 7.9 450.7 0.0 0.0 NO 450.7 0.0 0.0 NO 450.7 0.0 0.0 NO 450.7 0.0 0.0 NO CBIN11768 C CI0015 Curb Inlet 451.4 458.9 7.5 451.4 0.0 0.0 NO 451.4 0.0 0.0 NO 451.4 0.0 0.0 NO 451.4 0.0 0.0 NO CLEN11455 C ZCO10560 Cleanout 482.7 488.5 5.8 483.7 2.7 27.0 NO 484.0 4.4 44.6 NO 484.3 6.5 66.4 NO 484.5 7.4 75.3 NO CLEN11456 C ZCO10561 Cleanout 467.3 473.2 6.0 467.9 1.4 28.3 NO 468.0 2.2 46.7 NO 468.2 3.2 69.4 NO 468.3 3.6 78.6 NO CBIN11769 C CI0006 Curb Inlet 451.7 470.8 19.0 452.6 0.0 28.3 NO 452.8 0.0 46.7 NO 453.1 0.0 69.3 NO 453.2 0.0 78.6 NO CBIN11770 C CI0014 Curb Inlet 447.9 471.4 23.5 448.9 4.7 32.7 NO 449.1 7.6 53.9 NO 449.5 11.3 80.0 NO 449.6 12.8 90.7 NO CBIN11771 C CI0007 Curb Inlet 487.9 497.8 10.0 488.9 12.0 24.4 NO 489.2 19.2 40.3 NO 489.6 28.3 59.9 NO 489.7 31.9 68.0 NO CBIN11772 C CI0583 Curb Inlet 494.8 502.1 7.3 494.8 0.0 0.0 NO 494.8 0.0 0.0 NO 494.8 0.0 0.0 NO 494.8 0.0 0.0 NO CBIN11773 C CI0584 Curb Inlet 496.3 502.9 6.7 496.3 0.0 0.0 NO 496.3 0.0 0.0 NO 496.3 0.0 0.0 NO 496.3 0.0 0.0 NO CLEN11457 C ZCO12613 Cleanout 509.4 516.2 6.8 510.1 4.7 12.6 NO 510.3 8.2 21.5 NO 510.5 12.3 32.3 NO 510.6 14.0 36.7 NO INLT10849 C ZINL12614 Inlet 545.9 551.9 6.0 546.1 5.2 5.2 NO 546.2 8.8 8.8 NO 546.2 13.3 13.3 NO 546.3 15.1 15.1 NO INLT10850 C INL11134 Inlet 529.3 540.7 11.4 529.8 0.0 5.2 NO 529.9 0.0 8.8 NO 530.0 0.0 13.2 NO 530.1 0.0 15.1 NO CLEN11458 C ZCO10562 Cleanout 523.6 528.9 5.3 524.1 2.9 8.1 NO 524.2 4.8 13.5 NO 524.4 7.1 20.2 NO 524.4 8.0 23.0 NO OTLT10229 C OUT048 Outlet 406.0 413.7 7.7 410.4 0.0 65.7 NO 411.3 0.0 128.5 NO 411.7 0.0 188.3 NO 411.8 0.0 209.7 NO CLEN11459 C ZCO11851 Cleanout 494.5 507.7 13.2 495.2 0.9 69.6 NO 495.4 1.5 105.3 NO 495.5 2.2 143.0 NO 495.6 2.5 160.4 NO CLEN11460 C ZCO11852 Cleanout 498.3 510.3 12.0 499.6 0.0 69.2 NO 499.9 0.0 104.7 NO 500.2 0.0 142.2 NO 500.3 0.0 159.4 NO INLT10851 C ZINL12077 Inlet 463.3 469.8 6.5 465.3 0.0 69.6 NO 465.7 0.0 105.3 NO 466.1 0.0 143.0 NO 466.2 0.0 160.4 NO CBIN11774 C CI10316 Curb Inlet 506.3 512.3 6.0 506.3 0.0 0.0 NO 506.3 0.0 0.0 NO 506.3 0.0 0.0 NO 506.3 0.0 0.0 NO OTHR11496 C ZOTHER10355Other 501.7 512.5 10.8 502.9 1.4 69.2 NO 503.1 2.7 104.7 NO 503.4 4.5 142.2 NO 503.5 5.3 159.4 NO OTHR11497 C ZOTHER10356Other 502.7 513.2 10.5 503.8 0.0 68.1 NO 504.1 0.0 102.6 NO 504.3 0.0 138.9 NO 504.4 0.0 155.5 NO CBIN11775 C CI10317 Curb Inlet 506.3 512.7 6.4 506.3 0.0 0.0 NO 506.3 0.0 0.0 NO 506.3 0.0 0.0 NO 506.3 0.0 0.0 NO CLEN11461 C ZCO12964 Cleanout 513.3 523.4 10.2 514.4 1.5 68.1 NO 514.7 2.4 102.6 NO 514.9 3.6 138.8 NO 515.0 4.1 155.4 NO CLEN11462 C ZCO12079 Cleanout 562.3 575.2 12.9 575.2 25.4 50.0 NO 594.0 46.7 74.9 YES 627.6 71.3 107.2 YES 645.8 81.7 120.5 YES CBIN11776 C CI10318 Curb Inlet 574.8 578.8 4.0 574.9 0.0 0.3 NO 594.0 0.0 8.2 YES 627.6 0.0 15.9 YES 645.8 0.0 19.0 YES CBIN11777 C CI0016 Curb Inlet 473.2 480.7 7.6 473.2 0.0 0.0 NO 473.2 0.0 0.0 NO 473.2 0.0 0.0 NO 473.2 0.0 0.0 NO CBIN11778 C CI1167 Curb Inlet 458.8 465.7 6.9 458.8 0.0 0.0 NO 458.8 0.0 0.0 NO 458.8 0.0 0.0 NO 458.8 0.0 0.0 NO CBIN11779 C CI1171 Curb Inlet 459.6 466.2 6.6 459.6 0.0 0.0 NO 459.6 0.0 0.0 NO 459.6 0.0 0.0 NO 459.6 0.0 0.0 NO CBIN11780 C CI1170 Curb Inlet 456.7 463.3 6.6 456.7 0.0 0.0 NO 456.7 0.0 0.0 NO 456.7 0.0 0.0 NO 456.7 0.0 0.0 NO CBIN11781 C CI1169 Curb Inlet 454.2 461.6 7.4 454.6 0.0 2.1 NO 454.8 0.0 4.4 NO 455.0 0.0 7.0 NO 455.1 0.0 8.0 NO CBIN11782 C CI1168 Curb Inlet 453.8 461.3 7.6 454.0 0.0 2.1 NO 454.1 0.0 4.4 NO 454.2 0.0 6.9 NO 454.2 0.0 8.0 NO INLT10852 C ZINL12616 Inlet 460.7 466.9 6.2 461.0 2.1 2.1 NO 461.2 4.4 4.4 NO 461.3 7.0 7.0 NO 461.3 8.1 8.1 NO INLT10853 C ZINL12080 Inlet 414.0 430.1 16.2 415.6 0.0 50.7 NO 416.4 0.0 90.3 NO 417.8 0.0 130.1 NO 418.3 0.0 142.9 NO CLEN11463 C ZCO12782 Cleanout 449.8 466.3 16.5 450.6 0.0 50.7 NO 450.8 0.0 90.3 NO 451.0 0.0 130.1 NO 451.1 0.0 142.9 NO OTLT10230 C OUT050 Outlet 411.9 423.8 11.9 415.1 1.1 51.6 NO 415.6 1.9 92.1 NO 416.0 2.8 132.7 NO 416.1 3.2 145.8 NO CBIN11783 C CI10320 Curb Inlet 565.6 575.4 9.8 580.1 0.0 30.8 YES 609.3 0.0 56.2 YES 649.7 0.0 85.9 YES 671.4 0.0 98.3 YES INLT10854 C INL092 Inlet 569.0 574.2 5.2 580.1 0.0 10.3 YES 609.3 0.0 11.6 YES 649.7 0.0 20.7 YES 671.4 0.0 24.5 YES CBIN11784 C ZCI10321 Curb Inlet 475.6 479.7 4.1 475.6 0.0 0.0 NO 475.6 0.0 0.0 NO 475.6 0.0 0.0 NO 475.6 0.0 0.0 NO CLEN11464 C ZCO11280 Cleanout 468.3 473.6 5.3 468.8 10.0 10.0 NO 469.0 16.9 16.9 NO 469.1 25.3 25.3 NO 469.2 28.7 28.7 NO INLT10855 C ZINL10570 Inlet 500.8 504.8 4.0 501.5 11.1 11.1 NO 501.8 21.6 21.6 NO 502.0 33.5 33.5 NO 502.2 38.5 38.5 NO INLT10856 C ZINL11281 Inlet 494.5 501.6 7.1 495.0 3.2 14.2 NO 495.2 5.6 27.1 NO 495.3 8.5 41.9 NO 495.4 9.8 48.0 NO CLEN11465 C ZCO12617 Cleanout 522.2 551.2 28.9 523.6 22.8 22.8 NO 524.2 44.2 44.2 NO 524.7 68.6 68.6 NO 524.9 79.8 79.8 NO

APPENDIX E
EXISTING JUNCTIONS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 121 of 132 April 2019 Facility ID Sub
Watershed
Original
Facility ID Type
Invert
Elevation
(feet)
Rim
Elevation
(feet)
Depth
(feet)
Max.

HGL
(2-year)
(feet)
Max.

Lateral
Inflow
(2-year)
(cfs)
Max.

Total
Inflow
(2-year)
(cfs)
Surcharging
(2-year)
Max. HGL
(10-year)
(feet)
Max.

Lateral
Inflow
(10-year)
(cfs)
Max.

Total
Inflow
(10-year)
(cfs)
Surcharging
(10-year)
Max. HGL
(50-year)
(feet)
Max.

Lateral
Inflow
(50-year)
(cfs)
Max. Total
Inflow
(50-year)
(cfs)
Surcharging
(50-year)
Max. HGL
(100-year)
(feet)
Max.

Lateral
Inflow
(100-year)
(cfs)
Max. Total
Inflow
(100-year)
(cfs)
Surcharging
(100-year)
Existing Condition Junctions Summary table
Dimensions 2-year 10-year 50-year 100-year
INLT10857 C ZINL11135 Inlet 456.2 463.6 7.3 456.9 1.2 13.0 NO 457.1 2.0 20.7 NO 457.3 2.9 30.5 NO 457.3 3.3 34.3 NO INLT10858 C ZINL10573 Inlet 458.9 465.9 7.0 459.6 0.0 11.8 NO 459.8 0.0 18.8 NO 460.0 0.0 27.7 NO 460.1 0.0 31.2 NO INLT10859 C ZINL10574 Inlet 460.3 465.8 5.5 461.0 2.5 11.8 NO 461.2 4.0 18.8 NO 461.4 5.8 27.6 NO 461.5 6.6 31.1 NO INLT10860 C ZINL11283 Inlet 462.5 466.5 4.0 462.5 0.0 0.0 NO 462.5 0.0 0.0 NO 462.5 0.0 0.0 NO 462.5 0.0 0.0 NO CLEN11466 C ZCO10576 Cleanout 461.9 469.7 7.9 462.4 10.1 10.1 NO 462.6 16.9 16.9 NO 462.7 25.3 25.3 NO 462.8 28.7 28.7 NO INLT10861 C ZINL11745 Inlet 467.0 474.1 7.1 467.0 0.0 0.0 NO 467.0 0.0 0.0 NO 467.0 0.0 0.0 NO 467.0 0.0 0.0 NO INLT10862 C ZINL11746 Inlet 467.5 472.0 4.5 467.5 0.0 0.0 NO 467.5 0.0 0.0 NO 467.5 0.0 0.0 NO 467.5 0.0 0.0 NO CLEN11467 C ZCO12642 Cleanout 630.9 637.2 6.3 631.8 5.0 24.1 NO 632.2 8.2 39.0 NO 638.1 12.6 59.8 NO 640.1 14.4 63.1 YES CBIN11785 C CI0614 Curb Inlet 626.4 633.2 6.8 627.5 2.2 26.3 NO 628.0 3.5 42.5 NO 634.0 5.2 61.3 NO 635.6 5.8 61.3 YES CBIN11786 C CI0423 Curb Inlet 631.7 636.5 4.8 631.8 0.0 0.0 NO 632.2 0.0 0.0 NO 638.1 0.0 9.2 YES 640.1 0.0 6.7 YES CLEN11468 C ZCO10610 Cleanout 619.9 624.8 4.9 620.9 0.0 26.3 NO 621.3 0.0 42.5 NO 624.8 0.0 59.2 NO 625.3 0.0 59.5 NO CBIN11787 C CI0613 Curb Inlet 669.8 674.9 5.1 670.6 5.9 5.9 NO 670.9 10.0 10.0 NO 674.9 15.2 15.2 NO 674.9 17.3 17.3 NO CLEN11469 C ZCO12783 Cleanout 668.3 677.5 9.1 668.6 0.0 5.9 NO 668.7 0.0 10.0 NO 668.8 0.0 16.0 NO 668.8 0.0 18.3 NO OTLT10231 C OUT047 Outlet 610.3 614.3 4.0 611.0 0.0 5.9 NO 611.1 0.0 10.0 NO 611.2 0.0 15.1 NO 611.2 0.0 17.3 NO OTLT10232 C ZBAS008 Outlet 564.9 568.9 4.0 565.1 3.0 30.9 NO 565.2 4.7 50.0 NO 565.3 6.9 67.4 NO 565.3 7.7 70.0 NO CLEN11470 C ZCO12106 Cleanout 609.1 616.3 7.2 610.1 1.9 28.1 NO 610.4 3.3 45.7 NO 610.7 5.2 61.5 NO 610.7 6.0 62.8 NO CBIN11788 C CI0352 Curb Inlet 676.7 682.2 5.5 677.0 2.1 2.9 NO 677.1 3.5 4.7 NO 677.2 5.1 7.1 NO 677.2 5.8 8.0 NO CLEN11471 C ZCO12644 Cleanout 672.5 680.1 7.6 672.9 0.0 2.9 NO 673.0 0.0 4.7 NO 673.1 0.0 7.1 NO 673.1 0.0 8.0 NO INLT10863 C INL072 Inlet 737.3 741.3 4.0 737.3 0.0 0.0 NO 737.3 0.0 0.0 NO 737.3 0.0 0.0 NO 737.3 0.0 0.0 NO INLT10864 C ZINL11295 Inlet 693.0 702.2 9.1 693.2 0.8 0.8 NO 693.2 1.3 1.3 NO 693.3 2.0 2.0 NO 693.3 2.3 2.3 NO CBIN11789 C CI0355 Curb Inlet 648.3 653.8 5.5 648.3 0.0 0.0 NO 648.5 0.0 0.1 NO 649.7 0.0 2.1 NO 653.8 0.0 3.1 NO CBIN11790 C CI0350 Curb Inlet 647.1 654.7 7.5 648.2 14.4 14.4 NO 648.5 23.2 23.2 NO 651.0 34.4 34.4 NO 654.7 38.9 39.9 NO CLEN11472 C ZCO11068 Cleanout 645.1 658.3 13.2 645.7 6.2 20.4 NO 645.9 9.8 32.6 NO 646.0 14.3 46.6 NO 646.1 16.1 55.8 NO OTLT10233 C ZINL12107 Outlet 624.6 632.0 7.3 624.8 0.0 20.4 NO 624.8 0.0 32.6 NO 624.9 0.0 46.7 NO 624.9 0.0 56.6 NO CBIN11791 C CI1159 Curb Inlet 493.1 501.6 8.5 493.1 0.0 0.0 NO 493.1 0.0 0.0 NO 493.1 0.0 0.0 NO 493.1 0.0 0.0 NO CLEN11473 C ZCO10612 Cleanout 498.6 506.4 7.7 500.2 0.0 9.3 NO 506.4 0.0 15.3 NO 506.4 0.0 21.1 NO 506.7 0.0 21.7 NO OTLT10234 C ZINL10613 Outlet 488.3 499.2 11.0 488.3 0.0 9.0 NO 488.6 0.0 16.1 NO 489.0 0.0 20.8 NO 488.6 0.0 21.2 NO CLEN11474 C ZCO10614 Cleanout 431.5 450.2 18.7 432.2 0.0 45.7 NO 432.5 0.0 77.6 NO 432.7 0.0 114.5 NO 432.8 0.0 136.2 NO CBIN11792 C CI1214 Curb Inlet 446.4 455.7 9.3 447.5 0.9 21.8 NO 447.9 1.4 37.9 NO 448.3 2.1 55.7 NO 448.5 2.4 63.2 NO CLEN11475 C ZCO12109 Cleanout 444.1 460.1 16.0 444.7 0.0 21.7 NO 444.8 0.0 37.8 NO 444.9 0.0 55.7 NO 445.0 0.0 62.7 NO OTLT10235 C ZINL12110 Outlet 383.3 387.3 4.0 383.3 0.0 21.7 NO 383.3 0.0 37.9 NO 383.3 0.0 55.8 NO 383.3 0.0 62.7 NO CBIN11793 C CI1213 Curb Inlet 453.3 464.5 11.3 453.3 0.0 0.0 NO 453.3 0.0 0.0 NO 453.5 0.0 0.4 NO 453.8 0.0 0.7 NO INLT10865 C ZINL12111 Inlet 490.4 495.5 5.1 490.4 0.0 0.0 NO 490.4 0.0 0.0 NO 490.4 0.0 0.0 NO 490.4 0.0 0.0 NO INLT10866 C ZINL10615 Inlet 456.9 467.9 11.0 456.9 0.0 0.0 NO 456.9 0.0 0.0 NO 456.9 0.0 0.0 NO 456.9 0.0 0.0 NO CLEN11476 C ZCO10616 Cleanout 451.6 464.0 12.4 452.6 21.0 21.0 NO 453.0 36.6 36.6 NO 453.5 54.2 54.2 NO 453.7 62.0 62.0 NO CLEN11477 C ZCO12646 Cleanout 503.3 508.9 5.6 503.3 0.0 0.0 NO 503.3 0.0 0.0 NO 503.3 0.0 0.0 NO 503.3 0.0 0.0 NO CLEN11478 C ZCO13084 Cleanout 503.2 509.2 6.0 503.2 0.0 0.0 NO 503.2 0.0 0.0 NO 503.2 0.0 0.0 NO 503.2 0.0 0.0 NO CBIN11794 C CI1446 Curb Inlet 434.7 446.1 11.4 435.6 4.9 16.9 NO 436.1 7.8 26.7 NO 446.1 11.4 40.5 NO 446.1 12.8 43.6 NO CBIN11795 C CI1445 Curb Inlet 445.8 449.8 4.0 445.8 0.0 0.0 NO 445.8 0.0 0.0 NO 445.9 0.0 0.2 NO 445.9 0.0 0.1 NO INLT10867 C ZINL12845 Inlet 432.3 440.2 7.9 433.1 0.0 16.9 NO 433.2 0.0 26.3 NO 433.3 0.0 42.3 NO 433.3 0.0 43.0 NO OTLT10236 C OUT074 Outlet 349.2 353.2 4.0 368.0 1.3 1000.3 YES 374.5 2.1 983.1 YES 375.4 3.1 1523.4 YES 375.4 3.5 1255.7 YES INLT10868 C ZINL12647 Inlet 352.7 356.7 4.0 368.1 9.7 447.4 YES 374.6 15.8 501.0 YES 377.8 24.4 644.4 YES 379.0 28.0 655.9 YES CLEN11479 C CO073 Cleanout 493.7 497.7 4.0 493.7 0.0 0.0 NO 493.7 0.0 0.0 NO 493.7 0.0 0.0 NO 493.7 0.0 0.0 NO OTLT10237 C OUT10294 Outlet 429.3 437.8 8.5 429.9 0.0 21.4 NO 430.0 0.0 38.3 NO 430.2 0.0 56.5 NO 430.2 0.0 64.2 NO OTLT10238 C ZOUT10308 Outlet 369.5 373.5 4.0 370.0 0.0 34.4 NO 374.6 0.0 66.9 YES 377.8 0.0 197.5 YES 379.0 0.0 109.4 YES INLT10869 C ZINL13133 Inlet 371.3 375.3 4.0 374.2 3.4 34.8 NO 376.8 5.5 70.0 YES 378.0 8.3 192.6 YES 379.3 9.3 118.6 YES CBIN11796 C CI10359 Curb Inlet 460.9 464.9 4.0 460.9 0.0 0.0 NO 460.9 0.0 0.0 NO 460.9 0.0 0.0 NO 460.9 0.0 0.0 NO CLEN11480 C ZCO13025 Cleanout 458.9 462.9 4.0 459.4 8.4 8.4 NO 459.5 13.7 13.7 NO 459.6 20.5 20.5 NO 459.6 23.3 23.3 NO CLEN11481 C ZCO12800 Cleanout 495.7 506.3 10.6 495.7 0.0 0.0 NO 495.7 0.0 0.0 NO 495.7 0.0 0.0 NO 495.7 0.0 0.0 NO

APPENDIX E
EXISTING JUNCTIONS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 122 of 132 April 2019 Facility ID Sub
Watershed
Original
Facility ID Type
Invert
Elevation
(feet)
Rim
Elevation
(feet)
Depth
(feet)
Max.

HGL
(2-year)
(feet)
Max.

Lateral
Inflow
(2-year)
(cfs)
Max.

Total
Inflow
(2-year)
(cfs)
Surcharging
(2-year)
Max. HGL
(10-year)
(feet)
Max.

Lateral
Inflow
(10-year)
(cfs)
Max.

Total
Inflow
(10-year)
(cfs)
Surcharging
(10-year)
Max. HGL
(50-year)
(feet)
Max.

Lateral
Inflow
(50-year)
(cfs)
Max. Total
Inflow
(50-year)
(cfs)
Surcharging
(50-year)
Max. HGL
(100-year)
(feet)
Max.

Lateral
Inflow
(100-year)
(cfs)
Max. Total
Inflow
(100-year)
(cfs)
Surcharging
(100-year)
Existing Condition Junctions Summary table
Dimensions 2-year 10-year 50-year 100-year
CBIN11797 C CI1444 Curb Inlet 397.9 402.9 5.1 397.9 0.0 0.0 NO 397.9 0.0 0.0 NO 397.9 0.0 0.0 NO 397.9 0.0 0.0 NO CBIN11798 C CI1443 Curb Inlet 394.8 402.9 8.0 395.3 7.3 7.3 NO 395.4 11.6 11.6 NO 395.6 17.2 17.2 NO 395.7 19.5 19.5 NO CLEN11482 C ZCO11760 Cleanout 434.9 442.4 7.5 436.3 22.5 45.7 NO 436.8 38.9 77.6 NO 437.5 57.8 115.9 NO 442.4 66.0 135.5 NO CBIN11799 C CI1215 Curb Inlet 438.1 443.7 5.6 438.1 0.0 0.0 NO 438.1 0.0 0.0 NO 438.1 0.0 0.0 NO 439.3 0.0 5.6 NO CLEN11483 C ZCO10630 Cleanout 480.0 488.4 8.4 480.6 16.5 18.6 NO 480.8 28.0 31.3 NO 481.1 42.3 47.3 NO 481.1 48.1 53.8 NO CLEN11484 C ZCO10631 Cleanout 465.0 472.8 7.8 465.7 5.2 23.6 NO 466.0 8.2 39.3 NO 466.2 12.0 59.0 NO 466.3 13.5 67.0 NO CBIN11800 C CI1442 Curb Inlet 482.0 492.4 10.3 482.3 0.0 2.1 NO 482.4 0.0 3.4 NO 482.5 0.0 5.0 NO 482.5 0.0 5.7 NO CLEN11485 C ZCO10993 Cleanout 484.3 492.6 8.3 484.5 2.1 2.1 NO 484.6 3.4 3.4 NO 484.6 5.1 5.1 NO 484.6 5.7 5.7 NO CBIN11801 C CI0673 Curb Inlet 618.2 624.1 5.9 618.7 16.3 16.3 NO 618.9 29.2 29.2 NO 619.0 44.3 44.3 NO 619.1 50.6 50.6 NO CBIN11802 C CI0672 Curb Inlet 618.7 624.2 5.6 618.7 0.0 0.0 NO 618.9 0.0 0.0 NO 619.0 0.0 0.1 NO 619.1 0.0 0.1 NO OTLT10239 C ZINL10646 Outlet 569.5 596.8 27.3 570.4 0.0 16.3 NO 570.7 0.0 29.1 NO 570.9 0.0 44.1 NO 571.0 0.0 50.4 NO INLT10870 C INL080 Inlet 417.0 430.9 13.9 418.3 7.3 64.6 NO 419.0 14.2 126.9 NO 420.0 22.2 186.1 NO 423.5 25.6 209.6 NO INLT10871 C ZINL10654 Inlet 476.9 481.3 4.4 477.4 4.8 4.8 NO 477.5 7.7 7.7 NO 477.6 11.2 11.2 NO 477.7 12.6 12.6 NO INLT10872 C ZINL11149 Inlet 483.3 487.3 4.0 483.7 2.8 2.8 NO 483.9 4.5 4.5 NO 484.0 6.5 6.5 NO 484.0 7.4 7.4 NO CLEN11486 C ZCO10660 Cleanout 478.8 484.6 5.8 479.3 0.0 9.4 NO 479.5 0.0 15.1 NO 479.7 0.0 22.1 NO 479.8 0.0 24.9 NO INLT10873 C ZINL11319 Inlet 446.8 456.4 9.6 448.5 5.5 96.5 NO 448.9 9.8 146.2 NO 449.6 14.9 203.4 NO 449.9 17.1 228.6 NO INLT10874 C ZINL12136 Inlet 440.9 450.2 9.3 445.0 2.1 102.7 NO 445.7 3.4 158.1 NO 446.3 4.9 221.7 NO 446.4 5.6 248.3 NO INLT10875 C ZINL12137 Inlet 470.3 475.6 5.3 470.3 0.0 0.0 NO 470.3 0.0 0.0 NO 470.3 0.0 0.0 NO 470.3 0.0 0.0 NO OTHR11498 C ZOTHER10459Other 442.4 465.6 23.2 445.3 4.9 101.1 NO 446.1 8.1 154.7 NO 447.1 12.0 216.4 NO 447.4 13.6 242.9 NO OTLT10240 C ZOUT10037 Outlet 517.0 521.0 4.0 517.0 3.2 10.0 NO 517.0 4.9 17.9 NO 517.0 7.1 27.0 NO 517.0 8.0 30.9 NO CLEN11487 C ZCO12185 Cleanout 488.8 498.2 9.5 491.0 27.5 110.6 NO 491.7 48.4 185.0 NO 492.8 73.8 270.6 NO 498.3 84.5 320.4 NO CLEN11488 C ZCO12734 Cleanout 492.4 500.1 7.7 492.4 0.0 0.0 NO 492.4 0.0 0.0 NO 492.9 0.0 0.7 NO 500.1 0.0 8.9 NO CBIN11803 C CI1592 Curb Inlet 503.4 512.6 9.2 504.2 0.0 10.0 NO 504.5 0.0 17.9 NO 504.9 0.0 27.0 NO 505.0 0.0 30.9 NO CBIN11804 C CI1589 Curb Inlet 518.3 524.9 6.6 518.9 0.0 0.0 NO 519.3 0.0 0.0 NO 519.8 0.0 0.0 NO 520.0 0.0 0.0 NO CBIN11805 C CI1591 Curb Inlet 536.2 542.8 6.6 536.6 1.1 1.1 NO 536.6 1.8 1.8 NO 536.7 2.5 2.5 NO 536.8 2.8 2.8 NO INLT10876 C ZINL12735 Inlet 540.8 543.3 2.5 540.8 0.0 0.0 NO 540.8 0.0 0.0 NO 540.8 0.0 0.0 NO 540.8 0.0 0.0 NO CLEN11489 C ZCO10737 Cleanout 534.2 541.4 7.2 535.1 0.0 32.5 NO 535.5 0.0 54.3 NO 535.8 0.0 79.3 NO 536.0 0.0 90.1 NO CLEN11490 C ZCO10738 Cleanout 517.9 525.2 7.4 518.9 3.4 35.5 NO 519.3 5.4 59.2 NO 519.8 7.8 86.2 NO 520.0 8.7 98.0 NO CLEN11491 C ZCO10739 Cleanout 501.8 508.8 7.0 503.0 3.2 47.7 NO 503.4 4.9 80.6 NO 503.9 7.1 118.5 NO 504.0 8.0 133.6 NO CLEN11492 C ZCO11782 Cleanout 497.4 504.8 7.4 498.7 0.0 47.6 NO 499.1 0.0 80.7 NO 499.6 0.0 118.9 NO 500.6 0.0 133.8 NO CBIN11806 C CI1593 Curb Inlet 492.6 500.2 7.7 493.1 0.0 0.1 NO 493.5 0.0 0.2 NO 496.4 0.0 0.3 NO 500.3 0.0 5.6 NO CBIN11807 C CI1588 Curb Inlet 494.3 500.2 5.9 494.3 0.0 0.0 NO 494.3 0.0 0.0 NO 494.3 0.0 0.0 NO 500.3 0.0 17.1 NO CLEN11493 C ZCO10740 Cleanout 491.8 500.0 8.2 493.0 2.4 50.0 NO 493.5 4.3 85.1 NO 494.3 6.7 125.3 NO 500.1 7.7 158.7 NO CLEN11494 C ZCO10741 Cleanout 579.0 587.3 8.3 579.6 1.0 7.1 NO 579.7 1.6 11.3 NO 579.9 2.2 16.4 NO 580.0 2.5 18.5 NO CLEN11495 C ZCO10742 Cleanout 582.0 589.8 7.9 582.0 0.0 0.0 NO 582.0 0.0 0.0 NO 582.0 0.0 0.0 NO 582.0 0.0 0.0 NO CLEN11496 C ZCO11889 Cleanout 582.4 589.6 7.2 582.4 0.0 0.0 NO 582.4 0.0 0.0 NO 582.4 0.0 0.0 NO 582.4 0.0 0.0 NO OTHR11499 C ZOTHER10673Other 583.5 589.5 6.0 583.5 0.0 0.0 NO 583.5 0.0 0.0 NO 583.5 0.0 0.0 NO 583.5 0.0 0.0 NO OTHR11500 C ZOTHER10674Other 584.3 590.3 6.0 584.3 0.0 0.0 NO 584.3 0.0 0.0 NO 584.3 0.0 0.0 NO 584.3 0.0 0.0 NO OTHR11501 C ZOTHER10675Other 583.7 590.0 6.3 583.7 0.0 0.0 NO 583.7 0.0 0.0 NO 583.7 0.0 0.0 NO 583.7 0.0 0.0 NO CBIN11808 C CI0999 Curb Inlet 581.7 589.3 7.6 582.3 4.2 6.2 NO 582.4 6.5 9.7 NO 582.6 9.5 14.2 NO 582.7 10.7 16.0 NO CBIN11809 C CI1000 Curb Inlet 606.5 613.3 6.8 606.5 0.0 0.0 NO 606.5 0.0 0.0 NO 606.5 0.0 0.0 NO 606.6 0.0 0.0 NO CBIN11810 C CI0998 Curb Inlet 608.9 615.3 6.4 608.9 0.0 0.0 NO 608.9 0.0 0.0 NO 608.9 0.0 0.0 NO 608.9 0.0 0.0 NO CLEN11497 C ZCO11084 Cleanout 606.1 613.2 7.1 606.4 2.1 2.1 NO 606.4 3.4 3.4 NO 606.5 4.9 4.9 NO 606.5 5.6 5.6 NO INLT10877 C ZINL12186 Inlet 567.3 574.8 7.5 567.6 0.9 0.9 NO 567.7 1.4 1.4 NO 567.8 2.1 2.1 NO 567.8 2.3 2.3 NO CLEN11498 C ZCO10743 Cleanout 566.5 575.3 8.7 567.1 0.0 8.0 NO 567.3 0.0 12.6 NO 567.5 0.0 18.3 NO 567.6 0.0 20.6 NO CLEN11499 C ZCO10744 Cleanout 561.0 570.8 9.8 561.8 7.2 14.8 NO 562.0 11.4 23.4 NO 562.3 16.7 34.1 NO 562.4 18.8 38.4 NO CBIN11811 C CI1590 Curb Inlet 563.4 570.6 7.2 563.4 0.0 0.0 NO 563.4 0.0 0.0 NO 563.4 0.0 0.0 NO 563.4 0.0 0.0 NO INLT10878 C INL11353 Inlet 570.2 578.8 8.6 570.2 0.0 0.0 NO 570.2 0.0 0.0 NO 570.2 0.0 0.0 NO 570.2 0.0 0.0 NO CLEN11500 C ZCO11354 Cleanout 546.6 556.5 9.9 547.7 0.0 31.5 NO 548.0 0.0 52.9 NO 548.5 0.0 76.9 NO 548.7 0.0 86.6 NO

APPENDIX E
EXISTING JUNCTIONS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 123 of 132 April 2019 Facility ID Sub
Watershed
Original
Facility ID Type
Invert
Elevation
(feet)
Rim
Elevation
(feet)
Depth
(feet)
Max.

HGL
(2-year)
(feet)
Max.

Lateral
Inflow
(2-year)
(cfs)
Max.

Total
Inflow
(2-year)
(cfs)
Surcharging
(2-year)
Max. HGL
(10-year)
(feet)
Max.

Lateral
Inflow
(10-year)
(cfs)
Max.

Total
Inflow
(10-year)
(cfs)
Surcharging
(10-year)
Max. HGL
(50-year)
(feet)
Max.

Lateral
Inflow
(50-year)
(cfs)
Max. Total
Inflow
(50-year)
(cfs)
Surcharging
(50-year)
Max. HGL
(100-year)
(feet)
Max.

Lateral
Inflow
(100-year)
(cfs)
Max. Total
Inflow
(100-year)
(cfs)
Surcharging
(100-year)
Existing Condition Junctions Summary table
Dimensions 2-year 10-year 50-year 100-year
INLT10879 C INL122 Inlet 504.9 512.2 7.3 505.4 0.0 10.0 NO 505.6 0.0 17.9 NO 505.8 0.0 27.0 NO 505.8 0.0 30.9 NO INLT10880 C ZINL12802 Inlet 547.2 559.0 11.7 548.6 0.0 16.8 NO 559.0 0.0 29.6 NO 559.0 0.0 42.9 NO 559.0 0.0 48.3 NO CBIN11812 C CI1596 Curb Inlet 470.9 477.3 6.3 470.9 0.0 0.0 NO 471.7 0.0 3.5 NO 478.7 0.0 8.6 YES 480.8 0.0 7.7 YES INLT10881 C ZINL11365 Inlet 473.4 477.6 4.3 473.4 0.0 0.0 NO 473.4 0.0 0.0 NO 478.6 0.0 3.3 NO 480.7 0.0 6.5 YES CBOL10006 C ZCBO10052 Curb Outlet 466.7 473.0 6.4 467.8 12.4 12.4 NO 473.0 20.2 20.2 NO 478.5 30.3 34.4 YES 480.7 34.5 36.1 YES INLT10882 C ZINL12930 Inlet 471.3 477.3 6.0 471.3 0.0 0.0 NO 471.8 0.0 0.3 NO 478.7 0.0 7.2 YES 480.8 0.0 9.9 YES INLT10883 C ZINL11462 Inlet 501.3 505.3 4.0 501.3 0.0 0.0 NO 501.3 0.0 0.0 NO 501.3 0.0 0.0 NO 501.3 0.0 0.0 NO CLEN11501 C ZCO12193 Cleanout 638.6 643.4 4.9 638.6 0.0 0.0 NO 638.6 0.0 0.0 NO 643.7 0.0 4.5 NO 644.7 0.0 4.9 YES CBIN11813 C CI1165 Curb Inlet 632.2 643.3 11.1 632.8 0.0 5.6 NO 633.0 0.0 10.1 NO 633.2 0.0 15.5 NO 633.2 0.0 16.4 NO OTLT10241 C OUT045 Outlet 630.0 637.9 8.0 630.0 5.7 10.9 NO 630.0 9.7 19.2 NO 630.0 14.6 29.8 NO 630.0 16.6 32.5 NO CBIN11814 C ZCI10516 Curb Inlet 502.7 511.0 8.2 502.9 1.3 1.3 NO 502.9 2.1 2.1 NO 503.0 3.1 3.1 NO 503.0 3.5 3.5 NO OTHR11502 C ZOTHER10678Other 502.5 513.3 10.8 503.1 0.0 3.3 NO 503.2 0.0 5.2 NO 503.3 0.0 7.6 NO 503.4 0.0 8.6 NO OTHR11503 C ZOTHER10679Other 502.7 511.8 9.1 503.1 0.0 0.0 NO 503.2 0.0 0.0 NO 503.3 0.0 0.0 NO 503.4 0.0 0.0 NO SEPR10033 C ZSEP10022 Separator 509.0 513.7 4.6 509.7 0.0 3.3 NO 509.8 0.0 5.2 NO 510.0 0.0 7.6 NO 510.1 0.0 8.6 NO INLT10884 C ZINL11452 Inlet 515.3 519.6 4.3 515.3 0.0 0.0 NO 515.3 0.0 0.0 NO 515.3 0.0 0.0 NO 515.3 0.0 0.0 NO INLT10885 C ZINL10773 Inlet 511.8 517.9 6.1 511.8 0.0 0.0 NO 511.8 0.0 0.0 NO 511.8 0.0 0.0 NO 511.8 0.0 0.0 NO CLEN11502 C ZCO10774 Cleanout 514.1 518.9 4.7 514.1 0.0 0.0 NO 514.1 0.0 0.0 NO 514.1 0.0 0.0 NO 514.1 0.0 0.0 NO INLT10886 C ZINL10775 Inlet 501.7 512.9 11.2 502.2 0.0 3.3 NO 502.3 0.0 5.2 NO 502.4 0.0 7.6 NO 502.5 0.0 8.5 NO INLT10887 C ZINL11791 Inlet 509.1 513.1 4.0 509.7 3.3 3.3 NO 509.9 5.2 5.2 NO 510.1 7.7 7.7 NO 510.2 8.6 8.6 NO OTHR11504 C ZOTHER10680Other 505.2 517.9 12.7 505.6 0.0 3.3 NO 505.7 0.0 5.2 NO 505.8 0.0 7.6 NO 505.8 0.0 8.6 NO OTLT10242 C ZOTHER10681Outlet 509.0 513.7 4.7 509.0 0.0 3.3 NO 509.0 0.0 5.2 NO 509.1 0.0 7.6 NO 509.1 0.0 8.6 NO CBIN11815 C CI1633 Curb Inlet 567.6 573.6 6.1 567.6 0.0 0.0 NO 567.6 0.0 0.0 NO 567.6 0.0 0.0 NO 567.6 0.0 0.0 NO INLT10888 C ZINL11091 Inlet 572.4 576.4 4.0 572.4 0.0 0.0 NO 572.4 0.0 0.0 NO 572.4 0.0 0.0 NO 572.4 0.0 0.0 NO OTLT10243 C OUT060 Outlet 530.6 534.6 4.0 530.6 2.0 19.4 NO 530.6 3.6 36.2 NO 530.6 5.4 55.7 NO 530.6 6.2 62.9 NO CBIN11816 C CI1635 Curb Inlet 549.3 555.9 6.7 549.3 0.0 0.0 NO 549.3 0.0 0.0 NO 549.3 0.0 0.0 NO 549.3 0.0 0.2 NO CBIN11817 C CI1634 Curb Inlet 557.3 563.1 5.8 557.3 0.0 0.0 NO 557.3 0.0 0.0 NO 560.9 0.0 4.0 NO 563.2 0.0 9.7 NO INLT10889 C INL10787 Inlet 544.7 556.8 12.0 545.5 0.0 10.1 NO 545.8 0.0 19.2 NO 546.1 0.0 29.8 NO 550.1 0.0 34.4 NO CLEN11503 C ZCO11792 Cleanout 553.3 562.5 9.2 554.0 10.3 10.3 NO 554.3 19.4 19.4 NO 562.5 29.8 31.7 NO 562.6 34.1 44.0 NO CLEN11504 C ZCO11793 Cleanout 543.9 555.2 11.3 544.7 1.9 12.0 NO 545.0 3.9 23.0 NO 545.3 6.2 35.8 NO 552.5 7.1 41.2 NO INLT10890 C ZINL11794 Inlet 537.3 542.4 5.1 538.3 3.4 15.3 NO 538.7 6.2 29.0 NO 539.3 9.4 45.0 NO 542.4 10.8 51.0 NO OTHR11505 C ZOTHER10756Other 500.4 514.0 13.6 501.4 0.0 30.2 NO 501.6 0.0 47.3 NO 501.9 0.0 67.2 NO 502.0 0.0 75.4 NO CBIN11818 C CI1638 Curb Inlet 440.9 447.6 6.8 443.8 13.9 78.5 NO 445.0 24.1 127.3 NO 447.7 36.5 165.3 NO 447.7 41.6 163.2 NO INLT10891 C ZINL13293 Inlet 443.4 448.8 5.4 445.5 0.0 66.4 NO 448.8 0.0 106.6 NO 450.2 0.0 134.4 YES 449.3 0.0 135.9 NO INLT10892 C INL095 Inlet 449.2 455.4 6.3 450.5 0.0 66.4 NO 451.1 0.0 111.6 NO 455.4 0.0 137.4 NO 455.4 0.0 136.6 NO INLT10893 C ZOTHER11748Inlet 443.7 449.6 5.9 445.5 0.0 0.1 NO 449.6 0.0 0.2 NO 450.3 0.0 5.5 NO 449.6 0.0 0.3 NO INLT10894 C ZINL12989 Inlet 547.1 557.5 10.4 547.1 0.0 0.0 NO 547.1 0.0 0.0 NO 547.1 0.0 0.0 NO 547.3 0.0 1.7 NO INLT10895 C ZINL12990 Inlet 554.0 560.4 6.3 554.0 0.0 0.0 NO 554.0 0.0 0.0 NO 554.0 0.0 0.0 NO 554.0 0.0 0.0 NO CBIN11819 C CI10586 Curb Inlet 565.0 571.7 6.7 565.0 0.0 0.0 NO 565.0 0.0 0.0 NO 565.0 0.0 0.0 NO 565.0 0.0 0.0 NO INLT10896 C ZINL13060 Inlet 565.9 574.8 8.8 565.9 0.0 0.0 NO 565.9 0.0 0.0 NO 565.9 0.0 0.0 NO 565.9 0.0 0.0 NO INLT10897 C ZINL11398 Inlet 550.5 555.2 4.7 550.8 0.0 2.2 NO 550.9 0.0 4.0 NO 551.1 0.0 6.1 NO 551.1 0.0 6.9 NO INLT10898 C ZINL11399 Inlet 564.4 570.1 5.7 564.4 0.0 0.0 NO 564.4 0.0 0.0 NO 564.4 0.0 0.0 NO 564.4 0.0 0.0 NO CBIN11820 C CI10587 Curb Inlet 562.8 568.6 5.8 563.1 2.2 2.2 NO 563.2 4.0 4.0 NO 563.3 6.1 6.1 NO 563.3 7.0 7.0 NO OTLT10244 C ZINL12868 Outlet 572.7 576.7 4.0 572.7 2.3 14.4 NO 572.7 3.6 25.6 NO 572.7 5.1 37.1 NO 572.7 5.7 41.8 NO INLT10899 C ZINL12869 Inlet 571.8 575.8 4.0 572.3 2.5 16.8 NO 572.4 4.2 29.6 NO 572.6 6.2 42.9 NO 572.6 7.0 48.3 NO CLEN11505 C CO010 Cleanout 542.8 554.0 11.1 544.2 0.0 14.6 NO 554.0 0.0 22.9 NO 556.7 0.0 33.1 YES 557.9 0.0 33.5 YES CBIN11821 C CI1667 Curb Inlet 543.8 553.2 9.4 544.4 3.8 3.8 NO 553.3 6.0 6.0 NO 556.7 8.7 8.9 YES 557.9 9.8 9.8 YES CBIN11822 C CI1668 Curb Inlet 544.5 553.8 9.3 544.5 0.0 0.0 NO 553.8 0.0 3.1 NO 556.7 0.0 4.2 YES 557.9 0.0 4.4 YES INLT10900 C ZINL10034 Inlet 545.0 556.4 11.5 545.0 0.0 0.0 NO 556.3 0.0 3.5 NO 556.7 0.0 3.4 NO 557.9 0.0 3.7 YES CLEN11506 C ZCO10856 Cleanout 550.0 563.2 13.2 550.8 11.1 11.1 NO 563.2 19.1 20.9 NO 565.7 28.7 28.7 YES 567.3 32.6 32.6 YES

APPENDIX E
EXISTING JUNCTIONS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 124 of 132 April 2019 Facility ID Sub
Watershed
Original
Facility ID Type
Invert
Elevation
(feet)
Rim
Elevation
(feet)
Depth
(feet)
Max.

HGL
(2-year)
(feet)
Max.

Lateral
Inflow
(2-year)
(cfs)
Max.

Total
Inflow
(2-year)
(cfs)
Surcharging
(2-year)
Max. HGL
(10-year)
(feet)
Max.

Lateral
Inflow
(10-year)
(cfs)
Max.

Total
Inflow
(10-year)
(cfs)
Surcharging
(10-year)
Max. HGL
(50-year)
(feet)
Max.

Lateral
Inflow
(50-year)
(cfs)
Max. Total
Inflow
(50-year)
(cfs)
Surcharging
(50-year)
Max. HGL
(100-year)
(feet)
Max.

Lateral
Inflow
(100-year)
(cfs)
Max. Total
Inflow
(100-year)
(cfs)
Surcharging
(100-year)
Existing Condition Junctions Summary table
Dimensions 2-year 10-year 50-year 100-year
CLEN11507 C ZCO10857 Cleanout 553.7 564.5 10.9 553.7 0.0 0.0 NO 564.5 0.0 6.3 NO 565.8 0.0 9.0 YES 567.5 0.0 10.8 YES CBIN11823 C CI10595 Curb Inlet 554.3 564.7 10.4 554.3 0.0 0.0 NO 564.7 0.0 5.2 NO 565.8 0.0 4.3 YES 567.6 0.0 7.0 YES CBIN11824 C CI10596 Curb Inlet 554.3 564.7 10.4 554.3 0.0 0.0 NO 564.7 0.0 5.9 NO 565.8 0.0 7.4 YES 567.5 0.0 8.6 YES CBIN11825 C CI10597 Curb Inlet 559.4 568.7 9.3 559.4 0.0 0.0 NO 559.9 0.0 3.5 NO 568.7 0.0 7.4 NO 568.8 0.0 7.7 NO INLT10901 C ZINL10035 Inlet 565.1 574.5 9.4 565.1 0.0 0.0 NO 565.1 0.0 0.0 NO 565.8 0.0 2.8 NO 574.5 0.0 5.1 NO CLEN11508 C ZCO10036 Cleanout 538.2 553.5 15.3 539.7 3.0 33.1 NO 540.5 4.8 53.4 NO 553.5 7.0 66.9 NO 553.5 7.9 70.8 NO CBIN11826 C CI10598 Curb Inlet 542.1 556.6 14.5 543.2 16.3 16.3 NO 556.6 26.6 26.6 NO 557.9 39.5 43.1 YES 560.9 44.7 47.9 YES INLT10902 C ZINL10858 Inlet 550.4 561.6 11.2 550.4 0.0 0.0 NO 550.4 0.0 0.7 NO 561.7 0.0 7.7 NO 561.7 0.0 4.9 NO INLT10903 C ZINL10859 Inlet 573.9 585.0 11.1 573.9 0.0 0.0 NO 573.9 0.0 0.0 NO 573.9 0.0 0.0 NO 573.9 0.0 0.0 NO CBIN11827 C CI1666 Curb Inlet 573.5 582.8 9.3 573.5 0.0 0.0 NO 573.5 0.0 0.0 NO 573.7 0.0 0.1 NO 573.8 0.0 0.1 NO CBIN11828 C CI10599 Curb Inlet 574.4 582.7 8.3 574.4 0.0 0.0 NO 574.4 0.0 0.0 NO 574.4 0.0 0.0 NO 574.4 0.0 0.0 NO CLEN11509 C ZCO12231 Cleanout 572.7 583.3 10.6 573.3 4.7 7.9 NO 573.5 8.3 14.4 NO 573.7 12.6 21.9 NO 573.8 14.3 25.0 NO CLEN11510 C ZCO12232 Cleanout 595.6 606.8 11.3 595.9 0.0 3.4 NO 596.0 0.0 6.3 NO 596.1 0.0 9.6 NO 596.1 0.0 11.0 NO CLEN11511 C ZCO10039 Cleanout 606.6 620.4 13.8 606.9 0.0 3.4 NO 607.0 0.0 6.3 NO 607.1 0.0 9.7 NO 607.2 0.0 11.1 NO CBIN11829 C CI10600 Curb Inlet 608.2 620.2 11.9 608.7 3.4 3.4 NO 608.9 6.3 6.3 NO 609.1 9.7 9.7 NO 609.1 11.1 11.1 NO CBIN11830 C CI1664 Curb Inlet 643.3 651.6 8.4 643.3 0.0 0.0 NO 643.3 0.0 0.0 NO 643.3 0.0 0.0 NO 643.3 0.0 0.0 NO CBIN11831 C CI1663 Curb Inlet 642.3 652.0 9.7 642.3 0.0 0.0 NO 642.3 0.0 0.0 NO 642.3 0.0 0.0 NO 642.3 0.0 0.0 NO CLEN11512 C ZCO11002 Cleanout 563.6 576.3 12.7 564.3 0.0 16.1 NO 564.6 0.0 27.3 NO 564.8 0.0 40.6 NO 564.9 0.0 46.1 NO CLEN11513 C ZCO10860 Cleanout 554.9 566.7 11.9 555.8 2.3 18.3 NO 555.9 3.6 30.7 NO 556.2 5.3 45.5 NO 556.5 5.9 51.7 NO CBIN11832 C CI10601 Curb Inlet 555.8 566.7 10.9 555.8 0.0 0.0 NO 555.9 0.0 0.0 NO 556.2 0.0 0.0 NO 556.5 0.0 0.0 NO CBIN11833 C CI10602 Curb Inlet 555.8 566.7 10.9 555.8 0.0 0.0 NO 555.9 0.0 0.0 NO 556.2 0.0 0.0 NO 556.5 0.0 0.1 NO CLEN11514 C ZCO13062 Cleanout 540.5 552.7 12.2 541.3 1.4 15.0 NO 541.4 2.4 17.4 NO 541.4 3.6 20.1 NO 541.4 4.1 17.8 NO CLEN11515 C ZCO10861 Cleanout 579.6 590.3 10.8 580.1 3.2 8.3 NO 580.3 5.1 13.1 NO 580.5 7.3 19.0 NO 580.5 8.2 21.4 NO CBIN11834 C CI10604 Curb Inlet 581.9 590.3 8.4 581.9 0.0 0.0 NO 581.9 0.0 0.0 NO 581.9 0.0 0.0 NO 581.9 0.0 0.0 NO CBIN11835 C CI10605 Curb Inlet 581.3 590.2 8.9 581.3 0.0 0.0 NO 581.3 0.0 0.0 NO 581.3 0.0 0.0 NO 581.3 0.0 0.0 NO CBIN11836 C CI10606 Curb Inlet 596.2 608.3 12.1 596.2 0.0 0.0 NO 596.2 0.0 0.0 NO 596.2 0.0 0.0 NO 596.2 0.0 0.0 NO CBIN11837 C CI10607 Curb Inlet 595.7 607.9 12.2 595.7 0.0 0.0 NO 595.7 0.0 0.0 NO 595.7 0.0 0.0 NO 595.7 0.0 0.0 NO CLEN11516 C ZCO12992 Cleanout 594.9 608.4 13.5 595.4 4.5 5.3 NO 595.5 7.1 8.3 NO 595.7 10.2 12.1 NO 595.7 11.5 13.7 NO CLEN11517 C ZCO12234 Cleanout 600.9 618.5 17.6 601.1 0.0 0.9 NO 601.2 0.0 1.4 NO 601.3 0.0 2.1 NO 601.3 0.0 2.4 NO CLEN11518 C ZCO10862 Cleanout 602.5 621.5 19.0 602.8 0.0 0.9 NO 602.9 0.0 1.5 NO 603.0 0.0 2.1 NO 603.0 0.0 2.4 NO CLEN11519 C ZCO10863 Cleanout 618.5 628.8 10.4 618.6 0.9 0.9 NO 618.7 1.5 1.5 NO 618.7 2.2 2.2 NO 618.8 2.4 2.4 NO CBIN11838 C CI10608 Curb Inlet 619.1 628.4 9.3 619.1 0.0 0.0 NO 619.1 0.0 0.0 NO 619.1 0.0 0.0 NO 619.1 0.0 0.0 NO CBIN11839 C CI10609 Curb Inlet 619.1 628.5 9.4 619.1 0.0 0.0 NO 619.1 0.0 0.0 NO 619.1 0.0 0.0 NO 619.1 0.0 0.0 NO CBIN11840 C CI1398 Curb Inlet 584.0 589.3 5.4 584.0 0.0 0.0 NO 584.0 0.0 0.0 NO 584.0 0.0 0.0 NO 584.0 0.0 0.0 NO CBIN11841 C CI1399 Curb Inlet 583.5 587.9 4.5 583.5 0.0 0.0 NO 583.5 0.0 0.0 NO 583.5 0.0 0.0 NO 583.5 0.0 0.0 NO OTLT10245 C ZINL10889 Outlet 571.3 578.2 6.9 571.8 8.9 8.9 NO 572.0 15.3 15.3 NO 572.2 22.9 22.9 NO 572.4 26.0 26.0 NO CBIN11842 C CI0758 Curb Inlet 599.2 603.2 4.0 599.5 3.0 3.0 NO 599.6 5.0 5.0 NO 599.7 7.5 7.5 NO 599.7 8.5 8.5 NO OTLT10246 C ZINL11417 Outlet 576.3 580.3 4.0 576.6 0.0 3.0 NO 576.7 0.0 5.0 NO 576.8 0.0 7.4 NO 576.8 0.0 8.4 NO CBIN11843 C CI0068 Curb Inlet 624.0 628.0 4.0 624.0 0.0 0.0 NO 624.0 0.0 0.0 NO 624.0 0.0 0.0 NO 624.0 0.0 0.0 NO CBIN11844 C CI0069 Curb Inlet 622.3 627.8 5.6 622.3 0.0 0.0 NO 622.3 0.0 0.0 NO 622.3 0.0 0.0 NO 622.3 0.0 0.0 NO INLT10904 C ZINL11096 Inlet 599.3 603.3 4.0 600.1 11.3 11.3 NO 600.3 21.3 21.3 NO 600.6 32.8 32.8 NO 600.7 37.5 37.5 NO OTLT10247 C ZINL12241 Outlet 590.3 595.5 5.2 590.3 2.5 13.8 NO 590.3 4.3 25.5 NO 590.3 6.5 39.1 NO 590.3 7.4 44.8 NO OTHR11506 C ZOTHER10829Other 479.7 483.7 4.0 480.5 1.2 17.7 NO 480.7 1.9 26.4 NO 480.8 2.7 36.8 NO 480.8 3.1 40.8 NO OTHR11507 C ZOTHER10830Other 471.1 475.1 4.0 471.6 1.7 18.9 NO 471.7 2.7 28.3 NO 473.4 3.9 39.7 NO 475.3 4.3 44.1 NO CLEN11520 C ZCO12875 Cleanout 473.7 485.0 11.4 475.0 5.8 104.1 NO 475.4 9.7 182.9 NO 475.9 14.4 263.5 NO 476.5 16.4 294.2 NO CLEN11521 C ZCO11821 Cleanout 465.5 483.4 17.9 467.3 1.3 104.6 NO 468.0 2.0 183.9 NO 469.1 2.9 264.2 NO 483.4 3.3 295.7 NO CLEN11522 C ZCO11822 Cleanout 459.7 474.9 15.2 461.9 1.5 105.3 NO 462.9 2.5 185.3 NO 474.9 3.7 270.8 NO 474.9 4.2 299.1 NO CLEN11523 C ZCO11827 Cleanout 474.3 485.7 11.4 475.4 0.0 32.4 NO 475.9 0.0 58.9 NO 485.7 0.0 102.6 NO 485.7 0.0 100.5 NO OTLT10248 C ZOUT071 Outlet 578.6 582.6 4.0 578.7 0.0 11.0 NO 578.7 0.0 21.4 NO 578.7 0.0 28.0 NO 578.7 0.0 31.4 NO

APPENDIX E
EXISTING JUNCTIONS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 125 of 132 April 2019 Facility ID Sub
Watershed
Original
Facility ID Type
Invert
Elevation
(feet)
Rim
Elevation
(feet)
Depth
(feet)
Max.

HGL
(2-year)
(feet)
Max.

Lateral
Inflow
(2-year)
(cfs)
Max.

Total
Inflow
(2-year)
(cfs)
Surcharging
(2-year)
Max. HGL
(10-year)
(feet)
Max.

Lateral
Inflow
(10-year)
(cfs)
Max.

Total
Inflow
(10-year)
(cfs)
Surcharging
(10-year)
Max. HGL
(50-year)
(feet)
Max.

Lateral
Inflow
(50-year)
(cfs)
Max. Total
Inflow
(50-year)
(cfs)
Surcharging
(50-year)
Max. HGL
(100-year)
(feet)
Max.

Lateral
Inflow
(100-year)
(cfs)
Max. Total
Inflow
(100-year)
(cfs)
Surcharging
(100-year)
Existing Condition Junctions Summary table
Dimensions 2-year 10-year 50-year 100-year
INLT10905 C INL11438 Inlet 444.8 448.8 4.0 446.8 5.5 21.6 NO 447.8 12.1 38.8 NO 449.2 19.2 58.6 NO 449.9 22.2 67.2 YES OTLT10249 C ZOUT10097 Outlet 652.1 656.1 4.0 652.1 0.0 0.0 NO 652.1 0.0 0.0 NO 652.1 0.0 0.0 NO 652.1 0.0 0.0 NO CBIN11845 C CI0091 Curb Inlet 639.8 646.0 6.2 639.8 0.0 0.0 NO 639.8 0.0 0.0 NO 639.8 0.0 0.0 NO 639.8 0.0 0.0 NO CBIN11846 C CI1632 Curb Inlet 582.6 586.6 4.0 583.1 6.6 6.6 NO 583.2 11.8 11.8 NO 583.3 17.8 17.8 NO 583.4 20.3 20.3 NO OTLT10250 C ZOUT066 Outlet 580.9 584.9 4.0 581.6 0.0 6.6 NO 581.7 0.0 11.8 NO 581.8 0.0 17.8 NO 581.9 0.0 20.3 NO CBIN11847 C CI1578 Curb Inlet 498.5 504.5 6.0 499.1 7.8 7.8 NO 499.4 13.4 13.4 NO 499.7 20.4 20.4 NO 499.8 23.3 23.3 NO OTHR11508 C ZOTHER11374Other 408.6 440.8 32.2 440.8 3.3 186.2 NO 440.8 5.3 269.2 NO 440.8 7.7 322.5 NO 440.8 8.7 334.4 NO DETB10012 C ZBAS10009 Detention Basin 378.7 382.7 4.0 380.9 3.0 33.3 NO 381.2 4.8 66.5 NO 381.4 7.2 102.3 NO 381.5 8.2 118.0 NO OTLT10251 C ZOUT10074 Outlet 489.9 493.9 4.0 490.0 2.4 10.1 NO 490.1 3.7 17.1 NO 490.1 5.4 25.7 NO 490.1 6.1 29.2 NO OTHR11509 C ZOTHER11410Other 520.3 528.8 8.4 521.8 14.5 35.0 NO 528.8 22.7 44.4 NO 529.6 32.9 48.4 NO 531.4 37.1 51.5 YES INLT10906 C ZINL12924 Inlet 502.4 512.5 10.1 505.1 0.0 34.9 NO 504.5 0.0 43.0 NO 512.5 0.0 46.7 NO 512.5 0.0 48.4 NO OTLT10252 C ZINL12925 Outlet 502.4 508.0 5.6 502.4 1.4 55.3 NO 502.4 2.2 47.5 NO 503.9 3.2 65.3 NO 504.0 3.6 69.5 NO INLT10907 C INL097 Inlet 475.9 479.9 4.0 478.0 15.0 79.0 NO 478.8 25.7 131.9 NO 479.9 38.6 185.9 NO 480.1 43.9 209.4 NO OTLT10253 C ZOUT10275 Outlet 506.6 511.1 4.6 508.6 2.2 46.1 NO 508.9 3.5 82.0 NO 509.3 5.0 125.7 NO 509.5 5.7 144.0 NO OTHR11510 C ZOTHER11411Other 508.4 514.7 6.3 509.9 15.4 43.8 NO 510.5 26.1 78.4 NO 513.4 38.9 120.7 NO 513.7 44.3 138.3 NO OTHR11511 C ZOTHER11412Other 509.6 515.8 6.3 510.7 35.9 35.9 NO 511.2 64.8 64.8 NO 513.3 100.8 100.8 NO 515.2 116.0 116.0 NO CLEN11524 C ZCO12277 Cleanout 456.0 465.6 9.6 457.8 3.1 106.9 NO 458.5 5.0 187.9 NO 459.2 7.4 271.4 NO 459.6 8.4 297.6 NO CLEN11525 C ZCO10126 Cleanout 450.4 459.5 9.1 452.4 0.0 106.9 NO 453.5 0.0 187.8 NO 454.5 0.0 266.1 NO 455.1 0.0 288.5 NO INLT10908 C ZINL11448 Inlet 569.4 573.4 4.0 570.0 0.0 12.7 NO 570.2 0.0 18.8 NO 570.3 0.0 25.1 NO 570.3 0.0 27.3 NO INLT10909 C ZINL12929 Inlet 582.9 586.9 4.0 584.3 0.0 20.2 NO 584.6 0.0 30.1 NO 584.9 0.0 39.8 NO 585.1 0.0 44.2 NO CLEN11526 C ZCO12926 Cleanout 476.5 486.8 10.3 479.7 4.2 117.9 NO 486.8 6.8 215.6 NO 487.0 10.0 311.7 NO 487.7 11.3 310.8 NO OTHR11512 C ZOTHER11426Other 474.2 481.9 7.7 479.2 6.3 119.5 NO 481.8 9.9 214.1 NO 484.0 14.3 298.6 YES 484.7 16.0 310.8 YES CBIN11848 C CI1595 Curb Inlet 479.6 487.1 7.5 479.7 0.0 0.3 NO 487.2 0.0 6.7 NO 487.4 0.0 8.0 NO 487.8 0.0 7.7 NO CBIN11849 C CI1587 Curb Inlet 479.6 486.9 7.4 479.7 0.0 0.1 NO 487.0 0.0 14.1 NO 487.6 0.0 21.1 NO 487.8 0.0 21.0 NO INLT10910 C ZINL12291 Inlet 493.1 505.0 11.9 493.1 0.0 0.0 NO 493.1 0.0 0.0 NO 493.1 0.0 0.0 NO 493.1 0.0 0.0 NO CLEN11527 C ZCO12292 Cleanout 485.8 495.3 9.4 487.7 4.4 114.9 NO 488.3 6.8 190.9 NO 490.5 9.8 276.8 NO 495.3 11.0 312.2 NO INLT10911 C ZINL11197 Inlet 493.6 495.7 2.1 493.6 0.0 0.0 NO 493.6 0.0 0.0 NO 493.6 0.0 0.0 NO 495.8 0.0 8.4 NO CBIN11850 C CI1594 Curb Inlet 487.8 495.7 7.9 487.8 0.0 0.0 NO 488.4 0.0 0.4 NO 493.0 0.0 0.6 NO 495.7 0.0 7.9 NO CLEN11528 C ZCO12280 Cleanout 663.6 678.8 15.3 664.2 1.1 4.2 NO 664.4 1.7 6.6 NO 664.6 2.4 9.7 NO 664.7 2.7 10.9 NO OTLT10254 C INL144 Outlet 472.1 477.7 5.6 472.1 0.0 118.7 NO 472.1 0.0 214.0 NO 472.2 0.0 289.0 NO 472.2 0.0 308.1 NO CBIN11851 C CI1639 Curb Inlet 450.1 456.3 6.3 452.5 8.4 67.4 NO 456.3 15.2 107.5 NO 456.5 23.1 130.2 NO 457.0 26.7 134.2 NO OTHR11513 C ZOTHER11435Other 361.9 365.9 4.0 368.1 10.0 304.6 YES 374.6 17.5 519.6 YES 377.8 26.9 616.3 YES 379.0 30.9 708.9 YES OTHR11514 C ZOTHER11436Other 405.0 409.0 4.0 406.9 0.0 262.5 NO 407.4 0.0 461.0 NO 407.7 0.0 625.6 NO 407.7 0.0 672.3 NO OTHR11515 C ZOTHER11456Other 588.3 592.3 4.0 589.3 2.8 19.3 NO 589.5 4.5 33.3 NO 589.6 6.8 51.0 NO 589.7 7.7 56.7 NO OTHR11516 C ZOTHER11461Other 511.7 515.7 4.0 513.0 5.4 50.0 NO 513.4 8.7 86.8 NO 513.7 12.8 123.0 NO 513.7 14.4 133.3 NO OTHR11517 C ZOTHER11585Other 502.4 506.4 4.0 503.8 0.0 97.3 NO 504.0 0.0 124.9 NO 504.2 0.0 178.0 NO 504.3 0.0 203.9 NO INLT10912 C INL13228 Inlet 610.3 616.9 6.6 610.3 0.0 0.0 NO 610.3 0.0 0.0 NO 610.3 0.0 0.0 NO 610.3 0.0 0.0 NO CBIN11852 C CI10814 Curb Inlet 608.7 618.4 9.7 609.0 4.6 4.6 NO 609.1 8.8 8.8 NO 609.4 13.5 13.5 NO 610.3 15.6 15.6 NO INLT10913 C INL13229 Inlet 614.5 620.5 6.0 614.5 0.0 0.0 NO 614.5 0.0 0.0 NO 614.5 0.0 0.0 NO 614.5 0.0 0.0 NO OTHR11518 C ZOTHER11717Other 605.6 617.6 12.0 606.2 0.0 5.9 NO 606.5 0.0 11.3 NO 613.1 0.0 17.5 NO 613.0 0.0 18.7 NO CBIN11853 C CI10815 Curb Inlet 606.4 617.9 11.5 606.7 1.4 1.4 NO 606.8 2.5 2.5 NO 617.9 3.9 3.9 NO 617.9 4.4 4.4 NO CBIN11854 C CI10818 Curb Inlet 601.9 605.9 4.0 602.7 0.0 5.9 NO 603.1 0.0 11.2 NO 605.9 0.0 17.5 NO 606.3 0.0 18.7 NO OTLT10255 C OUT10222 Outlet 601.0 605.0 4.0 601.0 0.0 5.9 NO 601.0 0.0 11.2 NO 601.0 0.0 17.2 NO 601.0 0.0 18.1 NO INLT10914 C INL13231 Inlet 619.5 626.1 6.6 619.5 0.0 0.0 NO 619.5 0.0 0.0 NO 619.5 0.0 0.0 NO 619.5 0.0 0.0 NO OTLT10256 C OUT10223 Outlet 617.3 621.3 4.0 617.5 0.0 1.0 NO 617.5 0.0 1.7 NO 617.6 0.0 2.5 NO 617.6 0.0 2.8 NO INLT10915 C INL13233 Inlet 601.4 607.4 6.0 601.8 1.6 1.6 NO 601.9 3.6 3.6 NO 602.1 5.7 5.7 NO 602.1 6.6 6.6 NO OTHR11519 C OTHER11718 Other 600.9 606.9 6.0 601.2 0.0 1.6 NO 601.3 0.0 3.6 NO 601.3 0.0 5.7 NO 601.4 0.0 6.6 NO OTLT10257 C OUT10224 Outlet 585.0 589.0 4.0 585.1 0.0 1.6 NO 585.2 0.0 3.6 NO 585.2 0.0 5.7 NO 585.2 0.0 6.6 NO OTLT10258 C OUT10225 Outlet 584.2 588.2 4.0 588.2 0.0 14.8 NO 593.0 0.0 29.2 YES 603.4 0.0 44.9 YES 609.0 0.0 50.8 YES

APPENDIX E
EXISTING JUNCTIONS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 126 of 132 April 2019 Facility ID Sub
Watershed
Original
Facility ID Type
Invert
Elevation
(feet)
Rim
Elevation
(feet)
Depth
(feet)
Max.

HGL
(2-year)
(feet)
Max.

Lateral
Inflow
(2-year)
(cfs)
Max.

Total
Inflow
(2-year)
(cfs)
Surcharging
(2-year)
Max. HGL
(10-year)
(feet)
Max.

Lateral
Inflow
(10-year)
(cfs)
Max.

Total
Inflow
(10-year)
(cfs)
Surcharging
(10-year)
Max. HGL
(50-year)
(feet)
Max.

Lateral
Inflow
(50-year)
(cfs)
Max. Total
Inflow
(50-year)
(cfs)
Surcharging
(50-year)
Max. HGL
(100-year)
(feet)
Max.

Lateral
Inflow
(100-year)
(cfs)
Max. Total
Inflow
(100-year)
(cfs)
Surcharging
(100-year)
Existing Condition Junctions Summary table
Dimensions 2-year 10-year 50-year 100-year
INLT10916 C INL13235 Inlet 584.0 588.0 4.0 588.0 0.0 14.9 NO 592.3 0.0 27.4 YES 602.1 0.0 40.4 YES 607.3 0.0 45.5 YES OTLT10259 C INL13236 Outlet 582.8 586.8 4.0 582.8 0.0 15.0 NO 582.8 0.0 26.2 NO 582.8 0.0 37.4 NO 582.8 0.0 42.1 NO OTLT10260 C OUT10226 Outlet 584.4 588.4 4.0 584.4 0.0 5.8 NO 584.4 0.0 11.5 NO 584.4 0.0 17.8 NO 584.4 0.0 24.6 NO INLT10917 C INL13237 Inlet 584.7 607.6 22.9 585.7 1.8 5.6 NO 586.0 3.8 11.5 NO 597.2 6.0 17.8 NO 607.6 7.0 24.6 NO INLT10918 C INL13238 Inlet 585.7 607.6 21.8 586.1 1.0 1.0 NO 586.2 1.9 1.9 NO 607.6 2.9 2.9 NO 607.6 3.3 3.3 NO CLEN11529 C CO14014 Cleanout 585.7 607.7 22.0 586.4 0.0 3.0 NO 586.8 0.0 6.2 NO 600.4 0.0 9.8 NO 604.0 0.0 14.5 NO INLT10919 C INL13241 Inlet 585.8 604.3 18.5 586.5 0.0 2.4 NO 586.9 0.0 5.0 NO 602.2 0.0 7.9 NO 604.3 0.0 9.6 NO INLT10920 C INL13242 Inlet 585.9 604.1 18.2 586.5 2.4 2.4 NO 586.9 5.0 5.0 NO 602.7 7.9 7.9 NO 604.1 9.1 9.1 NO CLEN11530 C CO14015 Cleanout 586.6 609.9 23.3 586.9 0.6 0.6 NO 587.0 1.3 1.3 NO 606.4 2.1 3.1 NO 609.9 2.4 5.3 NO INLT10921 C INL13244 Inlet 587.3 609.7 22.4 587.3 0.0 0.0 NO 587.3 0.0 0.0 NO 609.7 0.0 2.3 NO 609.7 0.0 3.9 NO INLT10922 C INL13245 Inlet 636.4 640.4 4.0 636.9 7.7 7.7 NO 637.1 13.4 13.4 NO 637.3 20.2 20.2 NO 637.4 23.0 23.0 NO OTLT10261 C OUT10227 Outlet 635.2 639.2 4.0 636.3 0.0 7.7 NO 636.5 0.0 13.4 NO 636.6 0.0 20.2 NO 636.7 0.0 23.0 NO OTLT10262 C BAS10100 Detention Basin 584.7 588.7 4.0 584.7 0.0 14.8 NO 584.7 0.0 29.2 NO 584.7 0.0 44.9 NO 584.7 0.0 50.8 NO OTHR11520 C OTHER11720 Other 617.7 623.3 5.7 618.0 1.0 1.0 NO 618.1 1.7 1.7 NO 618.2 2.5 2.5 NO 618.2 2.9 2.9 NO INLT10923 C INL098 Inlet 468.2 475.8 7.6 468.9 0.0 0.0 NO 469.7 0.0 0.0 NO 475.8 0.0 2.5 NO 475.8 0.0 2.4 NO CBIN11855 C CI0997 Curb Inlet 582.5 589.7 7.2 582.9 0.0 2.1 NO 583.0 0.0 3.3 NO 583.2 0.0 4.8 NO 583.2 0.0 5.4 NO CBIN11856 C CI0354 Curb Inlet 654.7 663.0 8.3 654.7 0.0 0.0 NO 654.7 0.0 0.0 NO 654.7 0.0 0.0 NO 654.7 0.0 0.0 NO OTLT10263 C Outlet 599.8 603.8 4.0 600.5 7.1 13.3 NO 600.6 13.0 25.0 NO 600.8 19.8 38.4 NO 600.8 22.7 42.1 NO INLT10924 C Inlet 639.4 643.4 4.0 639.4 0.0 0.0 NO 639.4 0.0 0.0 NO 639.4 0.0 0.0 NO 639.4 0.0 0.0 NO OTHR11521 C Other 578.0 582.0 4.0 578.9 2.2 28.9 NO 579.2 4.3 51.5 NO 579.4 6.6 74.9 NO 579.4 7.6 84.3 NO OTLT10264 C Outlet 402.6 406.6 4.0 405.3 9.3 57.5 NO 405.6 15.5 82.3 NO 405.9 23.1 110.5 NO 406.0 26.3 122.1 NO OTHR11522 C Other 413.4 417.4 4.0 414.1 10.0 73.0 NO 414.3 17.0 121.5 NO 414.5 25.9 178.4 NO 414.6 29.6 200.0 NO DETB10013 C Detention Basin 569.0 573.0 4.0 569.1 16.0 30.8 NO 569.1 28.8 56.2 NO 569.1 43.7 85.9 NO 569.1 49.9 98.3 NO OTHR11523 C Other 474.9 478.9 4.0 475.1 17.4 45.9 NO 475.2 30.4 76.5 NO 475.3 46.6 110.0 NO 475.3 53.2 120.9 NO OTLT10265 C Outlet 573.6 577.6 4.0 573.9 1.3 12.3 NO 574.1 2.5 23.6 NO 574.2 4.7 32.5 NO 574.2 5.6 36.7 NO OTHR11524 C Other 458.1 462.1 4.0 459.0 19.9 66.2 NO 459.3 35.5 119.3 NO 459.5 54.1 172.7 NO 459.5 61.8 193.3 NO CBIN11857 C Curb Inlet 496.4 500.8 4.4 497.4 6.6 29.3 NO 497.9 11.1 56.3 NO 505.4 16.6 76.9 YES 507.2 18.8 79.0 YES OTHR11525 C Other 489.1 496.4 7.3 490.1 0.0 29.2 NO 490.6 0.0 56.3 NO 496.4 0.0 70.1 NO 497.3 0.0 71.7 NO OTHR11526 C Other 469.2 485.0 15.8 471.1 0.0 104.1 NO 471.9 0.0 182.9 NO 472.7 0.0 262.6 NO 485.0 0.0 298.4 NO DETB10014 C Detention Basin 553.8 557.8 4.0 553.8 7.1 338.8 NO 553.8 11.4 576.2 NO 553.8 16.8 869.5 NO 553.8 18.9 996.8 NO DETB10015 C Detention Basin 577.1 581.1 4.0 577.2 14.4 411.1 NO 577.2 22.6 665.8 NO 577.2 32.8 1265.2 NO 577.2 36.9 1350.2 NO OTLT10266 C Outlet 582.9 586.9 4.0 584.4 0.0 452.9 NO 584.9 0.0 794.7 NO 585.7 0.0 1082.3 NO 585.8 0.0 1124.1 NO OTLT10267 C Outlet 583.0 587.0 4.0 586.1 0.0 295.9 NO 587.1 0.0 552.7 NO 587.3 0.0 790.2 NO 587.3 0.0 887.6 NO CBIN11858 C Curb Inlet 528.5 532.5 4.0 529.4 17.5 22.9 NO 529.8 33.6 45.7 NO 536.5 52.8 72.2 YES 540.2 60.8 73.4 YES CBIN11859 C Curb Inlet 531.7 535.7 4.0 532.2 3.9 7.2 NO 532.4 7.3 15.1 NO 536.9 11.2 25.5 YES 540.6 12.8 26.1 YES CBIN11860 C Curb Inlet 496.9 500.9 4.0 497.4 0.0 0.0 NO 497.9 0.0 0.1 NO 505.4 0.0 3.6 YES 507.2 0.0 3.9 YES INLT10925 C Inlet 532.7 536.7 4.0 533.3 0.0 5.0 NO 533.5 0.0 10.2 NO 537.2 0.0 15.6 NO 540.9 0.0 19.8 YES OTLT10268 C ZINL12472 Outlet 434.0 438.0 4.0 434.3 1.8 39.3 NO 434.4 2.9 51.0 NO 434.4 4.2 63.5 NO 434.4 4.8 68.6 NO CLEN11531 C ZCO10360 Cleanout 459.4 479.4 20.0 459.9 4.5 9.0 NO 460.1 7.6 15.1 NO 460.2 11.5 22.7 NO 460.3 13.1 25.9 NO CBIN11861 C CI10158 Curb Inlet 461.9 475.5 13.6 462.5 0.0 4.8 NO 462.7 0.0 8.0 NO 462.9 0.0 12.0 NO 463.0 0.0 13.6 NO CBIN11862 C CI10159 Curb Inlet 464.6 476.0 11.4 464.6 0.0 0.0 NO 464.6 0.0 0.0 NO 464.6 0.0 0.0 NO 464.6 0.0 0.0 NO CLEN11532 C ZCO13007 Cleanout 471.0 486.4 15.4 471.4 0.0 4.8 NO 471.6 0.0 8.0 NO 471.7 0.0 12.1 NO 471.8 0.0 13.7 NO CBIN11863 C CI10160 Curb Inlet 473.7 488.4 14.7 473.9 1.2 1.2 NO 474.0 2.0 2.0 NO 474.0 3.0 3.0 NO 474.1 3.4 3.4 NO INLT10926 C ZINL11987 Inlet 475.6 488.0 12.3 475.6 0.0 0.0 NO 475.6 0.0 0.0 NO 475.6 0.0 0.0 NO 475.6 0.0 0.0 NO CLEN11533 C ZCO12949 Cleanout 474.0 489.2 15.3 474.6 0.9 3.7 NO 474.8 1.5 6.2 NO 475.1 2.2 9.4 NO 475.2 2.5 10.6 NO CLEN11534 C ZCO12105 Cleanout 651.4 659.7 8.3 652.1 11.4 14.1 NO 652.3 18.4 22.9 NO 652.6 27.4 34.2 NO 652.9 31.0 38.7 NO OTHR11527 C ZOTHER11366Other 642.3 648.3 6.0 643.1 5.3 19.2 NO 643.4 8.3 30.9 NO 644.0 12.1 45.9 NO 648.4 13.6 52.3 NO CLEN11535 C ZCO11684 Cleanout 539.5 545.8 6.3 539.5 0.0 0.0 NO 539.5 0.0 0.0 NO 539.5 0.0 0.0 NO 539.5 0.0 0.0 NO OTLT10269 C ZINL11685 Outlet 512.2 516.2 4.0 512.2 0.0 0.0 NO 512.2 0.0 0.0 NO 512.2 0.0 0.0 NO 512.2 0.0 0.0 NO

APPENDIX E
EXISTING JUNCTIONS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 127 of 132 April 2019 Facility ID Sub
Watershed
Original
Facility ID Type
Invert
Elevation
(feet)
Rim
Elevation
(feet)
Depth
(feet)
Max.

HGL
(2-year)
(feet)
Max.

Lateral
Inflow
(2-year)
(cfs)
Max.

Total
Inflow
(2-year)
(cfs)
Surcharging
(2-year)
Max. HGL
(10-year)
(feet)
Max.

Lateral
Inflow
(10-year)
(cfs)
Max.

Total
Inflow
(10-year)
(cfs)
Surcharging
(10-year)
Max. HGL
(50-year)
(feet)
Max.

Lateral
Inflow
(50-year)
(cfs)
Max. Total
Inflow
(50-year)
(cfs)
Surcharging
(50-year)
Max. HGL
(100-year)
(feet)
Max.

Lateral
Inflow
(100-year)
(cfs)
Max. Total
Inflow
(100-year)
(cfs)
Surcharging
(100-year)
Existing Condition Junctions Summary table
Dimensions 2-year 10-year 50-year 100-year
CBIN11864 C CI1560 Curb Inlet 560.6 566.6 6.0 563.6 23.4 23.4 NO 569.4 44.7 44.7 YES 583.9 71.3 71.3 YES 591.3 82.2 82.2 YES OTHR11528 C ZOTHER11408Other 560.5 566.5 6.0 561.8 0.0 23.4 NO 566.5 0.0 43.7 NO 572.6 0.0 64.0 YES 577.1 0.0 72.7 YES CLEN11536 C ZCO12796 Cleanout 559.6 565.2 5.6 560.8 0.0 37.6 NO 565.2 0.0 68.5 NO 569.5 0.0 100.6 YES 573.2 0.0 105.1 YES CLEN11537 C ZCO11120 Cleanout 569.3 574.1 4.8 570.0 13.7 14.4 NO 570.2 25.0 26.2 NO 574.1 38.4 40.2 NO 576.5 43.9 46.0 YES CLEN11538 C ZCO12500 Cleanout 554.9 560.9 6.0 555.8 0.0 37.6 NO 556.2 0.0 68.4 NO 561.0 0.0 95.9 NO 561.0 0.0 103.4 NO OTLT10270 C OUT054 Outlet 549.2 553.2 4.0 550.7 9.1 46.5 NO 551.1 14.8 81.1 NO 551.5 21.9 113.9 NO 551.6 24.7 122.2 NO CBIN11865 C CI10161 Curb Inlet 476.2 488.1 11.9 476.2 0.0 0.0 NO 476.2 0.0 0.0 NO 476.3 0.0 0.0 NO 476.4 0.0 0.0 NO CBIN11866 C CI10162 Curb Inlet 475.5 488.0 12.5 476.0 2.8 2.8 NO 476.1 4.8 4.8 NO 476.3 7.3 7.3 NO 476.4 8.3 8.3 NO INLT10927 C ZINL10546 Inlet 508.6 514.6 6.0 509.3 13.9 15.7 NO 509.6 27.2 30.3 NO 514.8 42.8 54.9 NO 517.0 49.4 68.1 YES INLT10928 C ZINL11272 Inlet 512.6 516.6 4.0 512.6 0.0 0.0 NO 512.6 0.0 0.0 NO 514.8 0.0 15.5 NO 517.0 0.0 15.0 NO CLEN11539 C ZCO12965 Cleanout 518.5 532.5 14.0 519.9 0.0 67.4 NO 520.2 0.0 101.5 NO 520.5 0.0 137.4 NO 520.6 0.0 153.7 NO OTHR11529 C ZOTHER10360Other 520.5 542.5 22.0 522.2 0.0 67.4 NO 522.6 0.0 101.6 NO 523.0 0.0 137.5 NO 523.2 0.0 153.8 NO CBIN11867 C CI0012 Curb Inlet 466.0 474.4 8.4 467.2 0.0 50.7 NO 467.7 0.0 90.2 NO 468.2 0.0 129.8 NO 468.3 0.0 142.7 NO CLEN11540 C ZCO12612 Cleanout 456.1 465.1 9.0 457.1 0.0 50.7 NO 457.4 0.0 90.3 NO 457.7 0.0 130.0 NO 457.8 0.0 142.8 NO CBIN11868 C CI0586 Curb Inlet 527.1 533.8 6.7 527.5 0.0 3.3 NO 527.7 0.0 6.5 NO 527.8 0.0 10.2 NO 527.8 0.0 11.7 NO INLT10929 C ZINL11553 Inlet 535.9 541.9 6.0 536.3 3.3 3.3 NO 536.4 6.6 6.6 NO 536.5 10.2 10.2 NO 536.6 11.7 11.7 NO CBIN11869 C CI0587 Curb Inlet 524.5 530.6 6.1 525.2 5.6 26.3 NO 525.4 8.7 48.0 NO 525.6 12.6 65.1 NO 525.7 14.1 70.9 NO CLEN11541 C ZCO11554 Cleanout 535.5 546.3 10.8 536.5 1.1 18.8 NO 536.9 1.8 34.6 NO 546.3 2.5 45.9 NO 546.3 2.9 47.8 NO CBIN11870 C CI0013 Curb Inlet 468.4 475.1 6.7 468.8 4.1 4.1 NO 469.0 7.0 7.0 NO 469.2 10.4 10.4 NO 469.3 11.9 11.9 NO CBIN11871 C CI1439 Curb Inlet 499.3 507.4 8.0 499.8 0.0 10.1 NO 500.0 0.0 17.1 NO 500.1 0.0 25.1 NO 500.2 0.0 27.9 NO CLEN11542 C ZCO10558 Cleanout 494.8 505.0 10.1 496.1 4.4 40.4 NO 496.6 7.7 72.0 NO 497.1 11.7 101.0 NO 497.4 13.4 110.6 NO CBIN11872 C CI1438 Curb Inlet 500.7 507.9 7.2 501.4 1.9 10.1 NO 501.6 3.0 17.0 NO 501.9 4.3 25.1 NO 502.0 4.8 27.9 NO CLEN11543 C ZCO12078 Cleanout 521.6 552.5 30.9 523.3 0.9 68.3 NO 523.8 1.4 101.7 NO 524.2 2.0 137.7 NO 524.4 2.3 154.1 NO CBIN11873 C CI0561 Curb Inlet 503.8 513.1 9.3 503.8 0.0 0.0 NO 513.1 0.0 1.8 NO 513.3 0.0 3.6 NO 514.2 0.0 3.3 YES CBIN11874 C CI1161 Curb Inlet 501.7 513.6 11.9 502.8 9.5 9.5 NO 513.6 14.9 15.3 NO 513.6 21.8 21.8 NO 514.1 24.5 24.5 NO CLEN11544 C ZCO11555 Cleanout 470.2 480.5 10.4 470.2 0.0 0.0 NO 470.2 0.0 0.0 NO 470.2 0.0 0.0 NO 470.2 0.0 0.0 NO CLEN11545 C ZCO11556 Cleanout 442.8 464.8 22.0 443.6 0.0 12.3 NO 443.8 0.0 19.5 NO 464.8 0.0 31.5 NO 464.8 0.0 32.1 NO CLEN11546 C ZCO10620 Cleanout 453.0 459.0 6.0 453.6 7.3 7.3 NO 453.8 11.5 11.5 NO 459.3 16.8 16.8 NO 461.2 19.0 19.0 YES CBIN11875 C CI10363 Curb Inlet 451.8 457.8 6.0 452.2 5.2 5.2 NO 452.4 8.2 8.2 NO 457.9 12.0 12.0 NO 458.7 13.5 13.5 NO INLT10930 C ZINL001 Inlet 375.6 379.6 4.0 376.0 7.9 7.9 NO 376.1 12.5 12.5 NO 376.2 18.4 18.4 NO 376.2 20.7 20.7 NO CBIN11876 C CI10212 Curb Inlet 574.8 581.1 6.3 575.0 0.7 0.7 NO 575.0 1.2 1.2 NO 575.1 1.8 1.8 NO 581.2 2.1 2.5 NO INLT10931 C ZINL10661 Inlet 491.7 497.7 6.0 492.4 9.4 9.4 NO 492.6 15.1 15.1 NO 492.8 22.3 22.3 NO 493.0 25.2 25.2 NO INLT10932 C ZINL11318 Inlet 497.3 502.8 5.5 497.3 0.0 0.0 NO 497.3 0.0 0.0 NO 497.3 0.0 0.0 NO 497.3 0.0 0.0 NO OTLT10271 C ZOUT10026 Outlet 429.3 453.6 24.4 429.9 9.7 11.7 NO 430.1 16.9 21.1 NO 430.3 25.7 32.4 NO 430.4 29.6 37.3 NO OTLT10272 C OUT092 Outlet 415.8 419.8 4.0 415.8 0.0 11.7 NO 415.8 0.0 21.1 NO 415.8 0.0 32.3 NO 415.8 0.0 37.3 NO CLEN11547 C ZCO10771 Cleanout 637.0 648.2 11.3 637.8 5.9 5.9 NO 638.4 10.7 10.7 NO 648.2 16.4 18.2 NO 648.3 18.7 19.2 NO CBIN11877 C CI1163 Curb Inlet 634.0 643.0 9.0 634.5 0.0 5.6 NO 634.7 0.0 10.1 NO 635.0 0.0 17.0 NO 635.0 0.0 17.9 NO OTHR11530 C ZOTHER10312Other 495.5 509.0 13.5 498.4 3.8 77.0 NO 509.0 7.4 109.3 NO 509.5 12.1 168.4 NO 510.3 14.0 208.9 YES OTLT10273 C ZINL12015 Outlet 502.1 506.1 4.0 502.1 0.0 2.0 NO 502.1 0.0 3.2 NO 502.1 0.0 4.7 NO 502.1 0.0 5.4 NO OTHR11531 C ZOTHER11460Other 451.0 455.0 4.0 452.5 1.6 67.0 NO 453.0 2.5 121.5 NO 453.3 3.7 176.4 NO 453.4 4.2 197.8 NO OTHR11532 C ZOTHER11458Other 405.7 409.7 4.0 408.3 1.3 61.8 NO 408.9 2.1 109.5 NO 409.3 3.1 156.6 NO 409.4 3.5 173.6 NO OTHR11533 C ZOTHER11459Other 410.9 414.9 4.0 413.4 0.9 51.4 NO 414.1 1.4 91.0 NO 414.7 2.0 128.9 NO 414.9 2.3 141.9 NO OTLT10274 C ZINL11148 Outlet 472.5 476.5 4.0 472.5 0.0 4.8 NO 472.5 0.0 7.6 NO 472.5 0.0 11.2 NO 472.5 0.0 12.6 NO OTHR11534 C ZOTHER11464Other 428.1 432.1 4.0 432.1 3.2 107.5 NO 433.0 5.6 165.8 NO 433.7 8.5 234.2 YES 434.8 9.7 260.4 YES OTLT10275 C ZINL10575 Outlet 442.3 446.3 4.0 442.3 0.0 10.1 NO 442.3 0.0 16.9 NO 442.3 0.0 25.3 NO 442.3 0.0 28.7 NO OTHR11535 C ZOTHER11463Other 426.6 430.6 4.0 431.6 2.8 109.6 YES 432.6 4.6 174.7 YES 433.4 6.9 251.9 YES 434.6 7.8 272.6 YES OTLT10276 C ZINL10572 Outlet 443.7 447.7 4.0 443.7 0.0 13.0 NO 443.7 0.0 20.7 NO 443.7 0.0 30.5 NO 443.7 0.0 34.3 NO OTHR11536 C ZOTHER11462Other 425.3 429.3 4.0 428.1 2.4 115.0 NO 428.5 4.1 185.0 NO 432.8 6.1 233.2 YES 434.4 7.0 232.7 YES OTLT10277 C ZINL12304 Outlet 483.1 487.1 4.0 483.1 0.0 2.8 NO 483.1 0.0 4.5 NO 483.1 0.0 6.5 NO 483.2 0.0 7.4 NO

APPENDIX E
EXISTING JUNCTIONS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 128 of 132 April 2019 Facility ID Sub
Watershed
Original
Facility ID Type
Invert
Elevation
(feet)
Rim
Elevation
(feet)
Depth
(feet)
Max.

HGL
(2-year)
(feet)
Max.

Lateral
Inflow
(2-year)
(cfs)
Max.

Total
Inflow
(2-year)
(cfs)
Surcharging
(2-year)
Max. HGL
(10-year)
(feet)
Max.

Lateral
Inflow
(10-year)
(cfs)
Max.

Total
Inflow
(10-year)
(cfs)
Surcharging
(10-year)
Max. HGL
(50-year)
(feet)
Max.

Lateral
Inflow
(50-year)
(cfs)
Max. Total
Inflow
(50-year)
(cfs)
Surcharging
(50-year)
Max. HGL
(100-year)
(feet)
Max.

Lateral
Inflow
(100-year)
(cfs)
Max. Total
Inflow
(100-year)
(cfs)
Surcharging
(100-year)
Existing Condition Junctions Summary table
Dimensions 2-year 10-year 50-year 100-year
OTHR11537 C ZOTHER11465Other 438.6 442.6 4.0 441.6 1.6 105.6 NO 442.6 2.5 161.8 NO 443.3 3.7 226.6 NO 443.6 4.2 255.2 YES OTLT10278 C ZINL11279 Outlet 454.3 462.2 7.9 454.3 0.0 9.9 NO 454.3 0.0 16.9 NO 454.3 0.0 25.3 NO 454.3 0.0 28.7 NO DETB10016 C ZBAS10003 Detention Basin 450.3 454.3 4.0 454.1 1.2 91.3 NO 454.4 2.0 136.9 NO 454.8 2.9 189.1 NO 454.9 3.3 212.4 NO OTHR11538 C ZOTHER11455Other 382.8 386.8 4.0 383.6 3.3 21.5 NO 383.8 5.3 38.8 NO 384.0 7.9 57.0 NO 384.0 9.0 65.2 NO OTHR11539 C ZOTHER11596Other 387.8 391.8 4.0 390.5 12.8 263.2 NO 391.8 20.7 467.1 NO 392.7 31.1 635.5 NO 393.0 35.3 685.2 YES CBIN11878 C CI10844 Curb Inlet 610.7 616.7 6.0 611.2 0.0 6.9 NO 611.4 0.0 12.9 NO 611.5 0.0 19.7 NO 611.6 0.0 22.5 NO CLEN11548 C CO14031 Cleanout 598.4 604.4 6.0 598.9 0.0 6.8 NO 599.1 0.0 12.7 NO 599.2 0.0 19.5 NO 599.3 0.0 22.3 NO CBIN11879 C CI10848 Curb Inlet 591.1 597.4 6.3 591.7 10.0 16.4 NO 591.9 17.5 29.6 NO 592.0 26.4 45.0 NO 592.1 30.1 51.4 NO OTLT10279 C OUT10407 Outlet 575.1 579.1 4.0 575.5 0.0 16.4 NO 575.6 0.0 29.6 NO 575.8 0.0 45.1 NO 575.8 0.0 51.5 NO CLEN11549 C ZCO12643 Cleanout 661.6 668.4 6.8 661.9 0.0 2.8 NO 662.0 0.0 4.7 NO 662.1 0.0 7.0 NO 662.2 0.0 7.9 NO OTLT10280 C OUT10207 Outlet 405.3 409.3 4.0 409.4 0.0 186.2 NO 409.6 0.0 269.2 NO 409.2 0.0 322.5 NO 408.9 0.0 334.4 NO OTHR11540 C ZOTHER11457Other 405.3 409.3 4.0 410.4 1.9 278.4 YES 411.2 3.1 391.8 YES 411.6 4.6 508.5 YES 411.7 5.2 542.0 YES CLEN11550 C ZCO10559 Cleanout 518.0 526.1 8.1 518.8 0.0 26.3 NO 519.1 0.0 48.0 NO 519.3 0.0 65.0 NO 519.4 0.0 69.9 NO OTLT10281 C ZINL12846 Outlet 370.0 379.1 9.1 370.0 0.0 8.3 NO 370.0 0.0 13.7 NO 370.0 0.0 20.4 NO 370.0 0.0 23.2 NO OTHR11541 C ZOTHER11454Other 360.9 364.9 4.0 368.1 2.3 304.2 YES 374.6 4.2 487.8 YES 377.8 6.4 591.7 YES 379.0 7.4 697.2 YES OTLT10282 C ZINL12799 Outlet 351.7 358.5 6.8 351.7 0.0 7.3 NO 351.7 0.0 11.6 NO 351.7 0.0 17.1 NO 351.7 0.0 19.4 NO INLT10933 C ZINL11282 Inlet 484.3 488.3 4.0 484.3 0.0 14.2 NO 484.3 0.0 27.1 NO 484.3 0.0 41.9 NO 484.3 0.0 48.0 NO OTHR11542 C ZOTHER11550Other 457.7 470.0 12.4 460.3 2.9 70.9 NO 460.7 5.1 107.5 NO 461.1 7.8 146.0 NO 461.2 8.9 163.9 NO CBIN11880 C CI0616 Curb Inlet 632.4 639.5 7.1 633.2 0.0 19.2 NO 633.5 0.0 30.9 NO 639.5 0.0 44.6 NO 641.1 0.0 52.2 YES CBIN11881 C CI10843 Curb Inlet 625.6 631.6 6.0 626.0 6.9 6.9 NO 626.2 12.9 12.9 NO 626.3 19.7 19.7 NO 626.4 22.6 22.6 NO INLT10934 C ZINL11447 Inlet 522.6 526.6 4.0 523.5 6.4 20.9 NO 526.3 10.7 34.8 NO 530.3 16.2 45.0 YES 532.1 18.6 46.3 YES OTHR11543 C ZOTHER11586Other 525.8 529.8 4.0 526.9 14.5 14.5 NO 527.0 24.4 24.4 NO 530.3 36.7 36.7 NO 532.1 41.8 41.8 YES OTHR11544 C ZOTHER11418Other 448.1 454.2 6.2 450.6 16.6 100.6 NO 452.9 29.5 216.2 NO 455.6 44.2 329.2 YES 456.2 50.9 343.2 YES OTLT10283 C OUT059 Outlet 469.6 476.9 7.3 470.6 14.1 130.7 NO 470.8 27.0 239.8 NO 471.0 42.1 324.9 NO 471.1 48.3 348.8 NO OTHR11545 C ZOTHER11419Other 445.4 449.4 4.0 450.1 0.0 100.9 NO 451.5 0.0 215.0 YES 452.2 0.0 312.0 YES 452.4 0.0 332.3 YES OTHR11546 C ZOTHER11433Other 444.2 448.2 4.0 449.9 4.4 198.9 YES 451.2 6.8 399.1 YES 452.0 9.9 581.3 YES 452.2 11.1 625.5 YES OTLT10284 C OUT061 Outlet 449.0 454.6 5.6 451.2 9.0 112.9 NO 452.5 15.8 198.6 NO 453.4 24.0 279.6 NO 453.5 27.5 305.0 NO INLT10935 C ZINL13130 Inlet 438.1 442.1 4.0 443.4 1.1 198.2 YES 447.1 1.7 379.8 YES 450.4 2.5 491.6 YES 451.3 2.8 516.0 YES CBIN11882 C CI1586 Curb Inlet 462.0 470.7 8.7 463.8 2.3 61.0 NO 464.5 3.5 95.4 NO 471.4 5.1 119.1 NO 473.1 5.7 119.7 YES OTHR11547 C Other 377.6 381.6 4.0 381.8 17.7 276.7 NO 383.2 30.0 494.1 YES 384.3 44.4 677.0 YES 384.7 50.7 741.1 YES OTLT10285 C OUT049 Outlet 438.4 444.1 5.7 439.8 0.0 32.6 NO 440.2 0.0 53.7 NO 440.6 0.0 79.8 NO 440.7 0.0 90.5 NO OTHR11548 C ZOTHER11416Other 490.2 524.0 33.8 494.5 2.7 415.0 NO 496.1 4.7 617.5 NO 501.9 7.8 914.8 NO 504.9 9.3 1087.2 NO INLT10936 C ZINL11449 Inlet 511.5 515.5 4.0 512.4 0.0 36.5 NO 512.7 0.0 59.4 NO 513.1 0.0 90.2 NO 513.2 0.0 99.6 NO CLEN11551 C ZCO12581 Cleanout 495.2 519.6 24.3 499.0 1.9 392.8 NO 499.7 3.0 614.2 NO 505.2 4.3 910.3 NO 519.6 4.8 1106.2 NO INLT10937 C INL123 Inlet 499.8 503.8 4.0 503.0 44.2 376.0 NO 503.8 72.5 604.2 NO 507.5 109.9 912.5 YES 512.4 124.5 1048.5 YES INLT10938 C ZINL10361 Inlet 445.3 449.3 4.0 472.0 9.8 49.4 YES 481.8 16.7 50.3 YES 489.6 25.3 56.2 YES 492.6 29.3 57.3 YES OTLT10286 C ZCO10075 Outlet 485.0 489.0 4.0 487.6 0.9 98.5 NO 488.4 1.5 174.9 NO 489.7 2.2 245.5 NO 492.6 2.5 267.6 YES INLT10939 C Inlet 495.4 507.4 11.9 497.2 3.0 106.3 NO 497.9 5.3 173.1 NO 507.5 8.0 265.5 NO 507.4 9.2 265.8 NO INLT10940 C Inlet 586.4 590.4 4.0 586.6 1.4 13.4 NO 586.7 2.4 26.0 NO 586.8 3.7 39.7 NO 586.8 4.2 44.7 NO INLT10941 C Inlet 487.8 491.8 4.0 489.6 0.0 99.3 NO 490.5 0.0 172.7 NO 493.1 0.0 254.2 YES 493.9 0.0 265.8 YES INLT10942 C Inlet 530.8 534.8 4.0 535.7 23.5 352.0 NO 536.6 41.5 595.5 YES 537.5 60.9 898.9 YES 537.8 70.4 1032.1 YES INLT10943 C Inlet 564.3 568.3 4.0 569.8 0.0 338.8 YES 570.7 0.0 576.2 YES 571.3 0.0 869.5 YES 571.6 0.0 996.8 YES INLT10944 C Inlet 572.1 581.6 9.5 574.3 6.0 420.8 NO 574.7 9.7 681.2 NO 575.5 14.4 1288.3 NO 575.6 16.2 1378.1 NO INLT10945 C Inlet 558.7 562.7 4.0 560.1 63.9 335.1 NO 560.6 114.7 570.5 NO 561.0 175.6 860.7 NO 561.1 203.0 987.1 NO INLT10946 C Inlet 587.9 591.9 4.0 589.1 5.4 19.1 NO 589.5 9.7 35.1 NO 589.8 14.7 53.6 NO 589.9 16.7 61.4 NO OTHR11549 C Other 367.0 371.0 4.0 368.5 0.0 34.4 NO 374.6 0.0 66.9 YES 377.8 0.0 197.3 YES 379.0 0.0 126.5 YES OTHR11550 C Other 364.5 368.5 4.0 368.1 0.0 34.3 NO 374.6 0.0 66.8 YES 377.8 0.0 211.2 YES 379.0 0.0 72.6 YES OTHR11551 C Other 375.0 379.0 4.0 376.5 0.0 35.2 NO 376.8 0.0 65.7 NO 378.0 0.0 114.2 NO 379.3 0.0 129.0 NO OTHR11552 C Other 564.4 568.4 4.0 565.6 0.0 19.3 NO 565.9 0.0 33.3 NO 566.2 0.0 50.9 NO 566.3 0.0 56.6 NO

APPENDIX E
EXISTING JUNCTIONS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 129 of 132 April 2019 Facility ID Sub
Watershed
Original
Facility ID Type
Invert
Elevation
(feet)
Rim
Elevation
(feet)
Depth
(feet)
Max.

HGL
(2-year)
(feet)
Max.

Lateral
Inflow
(2-year)
(cfs)
Max.

Total
Inflow
(2-year)
(cfs)
Surcharging
(2-year)
Max. HGL
(10-year)
(feet)
Max.

Lateral
Inflow
(10-year)
(cfs)
Max.

Total
Inflow
(10-year)
(cfs)
Surcharging
(10-year)
Max. HGL
(50-year)
(feet)
Max.

Lateral
Inflow
(50-year)
(cfs)
Max. Total
Inflow
(50-year)
(cfs)
Surcharging
(50-year)
Max. HGL
(100-year)
(feet)
Max.

Lateral
Inflow
(100-year)
(cfs)
Max. Total
Inflow
(100-year)
(cfs)
Surcharging
(100-year)
Existing Condition Junctions Summary table
Dimensions 2-year 10-year 50-year 100-year
OTHR11553 C Other 540.5 544.5 4.0 542.6 0.0 19.2 NO 543.0 0.0 33.0 NO 543.4 0.0 49.7 NO 543.5 0.0 55.7 NO OTHR11554 C Other 516.6 520.6 4.0 517.4 0.0 18.3 NO 517.7 0.0 31.6 NO 517.9 0.0 47.0 NO 518.0 0.0 52.9 NO OTHR11555 C Other 492.6 496.6 4.0 493.2 0.0 18.1 NO 493.5 0.0 31.4 NO 493.6 0.0 46.8 NO 493.7 0.0 52.7 NO OTHR11556 C Other 450.4 454.4 4.0 451.4 0.0 17.6 NO 451.7 0.0 30.7 NO 451.9 0.0 46.0 NO 451.9 0.0 52.1 NO OTHR11557 C Other 599.3 603.3 4.0 599.9 0.0 5.9 NO 600.1 0.0 9.9 NO 600.1 0.0 14.9 NO 600.2 0.0 17.0 NO OTHR11558 C Other 504.5 508.5 4.0 505.6 0.0 45.8 NO 505.9 0.0 80.7 NO 506.1 0.0 123.1 NO 506.2 0.0 141.8 NO OTHR11559 C Other 497.1 501.1 4.0 498.9 0.0 90.8 NO 499.2 0.0 124.9 NO 499.5 0.0 172.0 NO 499.6 0.0 192.3 NO OTHR11560 C Other 491.8 495.8 4.0 494.7 0.0 79.1 NO 495.3 0.0 124.2 NO 495.7 0.0 169.9 NO 495.8 0.0 189.8 NO OTHR11561 C Other 486.5 490.5 4.0 488.6 0.0 72.3 NO 489.1 0.0 121.1 NO 489.4 0.0 169.2 NO 489.6 0.0 189.5 NO OTHR11562 C Other 481.2 485.2 4.0 483.4 0.0 71.7 NO 483.9 0.0 120.4 NO 484.3 0.0 167.1 NO 484.4 0.0 187.1 NO OTHR11563 C Other 574.9 578.9 4.0 576.0 0.0 6.6 NO 576.1 0.0 11.7 NO 576.2 0.0 17.8 NO 576.2 0.0 20.3 NO OTHR11564 C Other 568.9 572.9 4.0 569.2 0.0 6.4 NO 569.3 0.0 11.5 NO 569.5 0.0 17.5 NO 569.5 0.0 20.0 NO OTHR11565 C Other 562.8 566.8 4.0 563.7 0.0 6.2 NO 563.9 0.0 11.3 NO 564.0 0.0 17.1 NO 564.1 0.0 19.5 NO OTHR11566 C Other 556.8 560.8 4.0 557.3 0.0 6.0 NO 557.4 0.0 10.8 NO 557.6 0.0 16.4 NO 557.6 0.0 18.9 NO OTHR11567 C Other 550.8 554.8 4.0 551.0 0.0 6.0 NO 551.1 0.0 10.7 NO 551.2 0.0 16.4 NO 551.3 0.0 19.0 NO OTHR11568 C Other 544.8 548.8 4.0 545.8 0.0 5.8 NO 546.0 0.0 10.6 NO 546.1 0.0 16.2 NO 546.2 0.0 18.7 NO OTHR11569 C Other 538.7 542.7 4.0 539.1 0.0 5.0 NO 539.3 0.0 10.2 NO 539.5 0.0 15.7 NO 540.9 0.0 25.6 NO OTHR11570 C Other 536.7 540.7 4.0 538.6 0.0 46.4 NO 539.5 0.0 80.3 NO 540.2 0.0 113.9 NO 540.3 0.0 122.2 NO OTHR11571 C Other 524.2 528.2 4.0 526.0 0.0 45.5 NO 526.4 0.0 79.6 NO 526.7 0.0 113.3 NO 526.8 0.0 122.0 NO OTHR11572 C Other 444.2 448.2 4.0 446.6 0.0 66.5 NO 447.3 0.0 121.1 NO 447.9 0.0 176.1 NO 448.1 0.0 197.5 NO OTHR11573 C Other 437.4 441.4 4.0 439.7 0.0 69.1 NO 440.0 0.0 120.4 NO 440.2 0.0 175.7 NO 440.3 0.0 197.0 NO OTHR11574 C Other 430.6 434.6 4.0 431.7 0.0 64.3 NO 432.1 0.0 121.1 NO 432.3 0.0 176.0 NO 432.4 0.0 197.4 NO OTHR11575 C Other 423.8 427.8 4.0 425.0 0.0 61.5 NO 425.6 0.0 119.9 NO 426.0 0.0 175.0 NO 426.1 0.0 196.3 NO OTHR11576 C Other 405.2 409.2 4.0 407.9 0.0 225.5 NO 408.6 0.0 391.5 NO 409.0 0.0 508.3 NO 409.1 0.0 541.8 NO OTHR11577 C Other 361.4 365.4 4.0 368.1 0.0 303.5 YES 374.6 0.0 496.5 YES 377.8 0.0 589.6 YES 379.0 0.0 696.6 YES OTHR11578 C Other 411.4 415.4 4.0 413.7 0.0 52.1 NO 414.3 0.0 91.7 NO 414.9 0.0 131.4 NO 415.0 0.0 144.5 NO OTHR11579 C Other 427.3 431.3 4.0 431.7 0.0 104.5 NO 432.6 0.0 163.8 YES 433.4 0.0 232.9 YES 434.6 0.0 253.3 YES OTHR11580 C Other 426.2 430.2 4.0 431.5 0.0 109.2 YES 432.5 0.0 174.3 YES 433.4 0.0 251.4 YES 434.6 0.0 270.2 YES OTHR11581 C Other 425.8 429.8 4.0 428.8 0.0 108.4 NO 429.4 0.0 173.4 NO 432.8 0.0 248.3 YES 434.4 0.0 255.7 YES OTHR11582 C Other 419.4 423.4 4.0 421.2 0.0 115.0 NO 426.4 0.0 184.9 YES 432.8 0.0 225.4 YES 434.4 0.0 238.9 YES OTHR11583 C Other 439.7 443.7 4.0 442.5 0.0 102.2 NO 443.1 0.0 157.0 NO 443.8 0.0 220.6 NO 444.1 0.0 247.6 NO OTHR11584 C Other 435.9 439.9 4.0 440.4 0.0 105.1 NO 441.5 0.0 161.5 YES 442.3 0.0 225.8 YES 442.6 0.0 254.4 YES OTHR11585 C Other 433.3 437.3 4.0 435.9 0.0 103.9 NO 436.5 0.0 161.1 NO 436.9 0.0 225.2 NO 437.1 0.0 254.0 NO OTHR11586 C Other 430.7 434.7 4.0 432.8 0.0 103.7 NO 433.4 0.0 161.9 NO 434.0 0.0 224.7 NO 434.9 0.0 253.2 NO OTHR11587 C Other 448.5 452.5 4.0 451.7 0.0 91.3 NO 451.9 0.0 136.9 NO 452.1 0.0 189.1 NO 452.1 0.0 212.4 NO OTHR11588 C Other 460.5 464.5 4.0 461.5 0.0 69.5 NO 461.7 0.0 105.1 NO 461.9 0.0 142.8 NO 462.0 0.0 160.1 NO OTHR11589 C Other 454.0 458.0 4.0 455.4 0.0 70.7 NO 455.7 0.0 107.4 NO 455.9 0.0 145.8 NO 456.0 0.0 163.6 NO OTHR11590 C Other 380.7 384.7 4.0 381.1 0.0 21.4 NO 381.3 0.0 38.8 NO 381.4 0.0 56.9 NO 381.5 0.0 65.2 NO OTHR11591 C Other 455.7 459.7 4.0 456.8 0.0 36.4 NO 457.1 0.0 65.7 NO 457.4 0.0 95.2 NO 457.5 0.0 106.5 NO OTHR11592 C Other 453.3 457.3 4.0 454.7 0.0 36.2 NO 455.1 0.0 65.5 NO 455.4 0.0 95.0 NO 455.5 0.0 106.3 NO OTHR11593 C Other 466.0 470.0 4.0 467.2 0.0 130.5 NO 467.5 0.0 226.3 NO 467.8 0.0 323.1 NO 467.8 0.0 348.6 NO OTHR11594 C Other 462.4 466.4 4.0 464.7 0.0 127.1 NO 465.0 0.0 216.7 NO 465.4 0.0 318.9 NO 465.5 0.0 345.7 NO OTHR11595 C Other 458.9 462.9 4.0 462.3 0.0 119.4 NO 462.6 0.0 203.2 NO 462.7 0.0 310.1 NO 462.8 0.0 339.1 NO OTHR11596 C Other 455.3 459.3 4.0 456.2 0.0 97.0 NO 456.6 0.0 219.5 NO 456.9 0.0 318.2 NO 457.0 0.0 346.8 NO OTHR11597 C Other 451.7 455.7 4.0 454.4 0.0 95.8 NO 455.3 0.0 211.2 NO 456.0 0.0 312.2 NO 456.5 0.0 341.9 NO OTHR11598 C Other 444.8 448.8 4.0 450.0 0.0 101.2 YES 451.3 0.0 214.7 YES 452.1 0.0 311.7 YES 452.3 0.0 332.0 YES OTHR11599 C Other 446.6 450.6 4.0 450.6 0.0 112.7 NO 451.9 0.0 198.5 YES 452.7 0.0 279.0 YES 452.8 0.0 304.4 YES OTHR11600 C Other 442.2 446.2 4.0 449.5 0.0 197.9 YES 450.5 0.0 393.3 YES 451.2 0.0 571.8 YES 451.7 0.0 617.2 YES OTHR11601 C Other 440.1 444.1 4.0 443.8 0.0 198.2 NO 447.1 0.0 395.4 YES 450.4 0.0 566.7 YES 451.3 0.0 609.3 YES

APPENDIX E
EXISTING JUNCTIONS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 130 of 132 April 2019 Facility ID Sub
Watershed
Original
Facility ID Type
Invert
Elevation
(feet)
Rim
Elevation
(feet)
Depth
(feet)
Max.

HGL
(2-year)
(feet)
Max.

Lateral
Inflow
(2-year)
(cfs)
Max.

Total
Inflow
(2-year)
(cfs)
Surcharging
(2-year)
Max. HGL
(10-year)
(feet)
Max.

Lateral
Inflow
(10-year)
(cfs)
Max.

Total
Inflow
(10-year)
(cfs)
Surcharging
(10-year)
Max. HGL
(50-year)
(feet)
Max.

Lateral
Inflow
(50-year)
(cfs)
Max. Total
Inflow
(50-year)
(cfs)
Surcharging
(50-year)
Max. HGL
(100-year)
(feet)
Max.

Lateral
Inflow
(100-year)
(cfs)
Max. Total
Inflow
(100-year)
(cfs)
Surcharging
(100-year)
Existing Condition Junctions Summary table
Dimensions 2-year 10-year 50-year 100-year
OTHR11602 C Other 386.4 390.4 4.0 390.3 0.0 262.5 NO 391.6 0.0 466.3 YES 392.5 0.0 634.1 YES 392.8 0.0 684.0 YES OTHR11603 C Other 384.9 388.9 4.0 390.0 0.0 261.6 YES 391.3 0.0 465.4 YES 392.2 0.0 633.0 YES 392.5 0.0 683.1 YES OTHR11604 C Other 383.4 387.4 4.0 389.9 0.0 260.6 YES 391.1 0.0 464.5 YES 392.0 0.0 631.9 YES 392.3 0.0 682.3 YES OTHR11605 C Other 382.0 386.0 4.0 389.4 0.0 260.3 YES 390.2 0.0 464.3 YES 390.6 0.0 631.7 YES 390.7 0.0 682.1 YES OTHR11606 C Other 380.5 384.5 4.0 383.9 0.0 260.2 NO 384.9 0.0 464.3 NO 385.6 0.0 631.7 YES 385.8 0.0 682.1 YES OTHR11607 C Other 379.0 383.0 4.0 382.0 0.0 260.2 NO 383.4 0.0 464.2 NO 384.4 0.0 631.2 YES 384.8 0.0 682.6 YES OTHR11608 C Other 423.2 427.2 4.0 425.4 0.0 32.5 NO 425.9 0.0 53.6 NO 426.3 0.0 79.7 NO 426.5 0.0 90.4 NO OTHR11609 C Other 408.0 412.0 4.0 409.3 0.0 32.1 NO 409.7 0.0 53.0 NO 409.9 0.0 78.9 NO 410.0 0.0 89.5 NO OTHR11610 C Other 392.8 396.8 4.0 393.9 0.0 31.1 NO 394.2 0.0 51.6 NO 394.4 0.0 77.1 NO 394.5 0.0 87.7 NO OTHR11611 C Other 560.4 564.4 4.0 562.4 0.0 16.1 NO 562.8 0.0 29.0 NO 563.1 0.0 44.0 NO 563.2 0.0 50.2 NO OTHR11612 C Other 551.4 555.4 4.0 552.0 0.0 15.1 NO 552.2 0.0 28.2 NO 552.4 0.0 42.9 NO 552.5 0.0 49.0 NO OTHR11613 C Other 559.0 563.0 4.0 559.5 0.0 3.0 NO 559.6 0.0 5.0 NO 559.7 0.0 7.4 NO 559.8 0.0 8.4 NO OTHR11614 C Other 541.6 545.6 4.0 541.7 0.0 2.7 NO 541.8 0.0 4.6 NO 541.8 0.0 7.0 NO 541.8 0.0 7.9 NO OTHR11615 C Other 552.4 556.4 4.0 553.2 0.0 8.8 NO 553.6 0.0 15.2 NO 553.9 0.0 22.6 NO 554.0 0.0 25.8 NO OTHR11616 C Other 533.6 537.6 4.0 535.8 0.0 8.4 NO 536.1 0.0 14.0 NO 536.3 0.0 21.6 NO 536.4 0.0 24.7 NO OTHR11617 C Other 514.7 518.7 4.0 515.3 0.0 7.4 NO 515.5 0.0 13.2 NO 515.7 0.0 20.4 NO 515.8 0.0 23.5 NO OTHR11618 C Other 495.8 499.8 4.0 496.2 0.0 7.4 NO 496.4 0.0 13.0 NO 496.5 0.0 20.1 NO 496.5 0.0 23.1 NO OTHR11619 C Other 476.9 480.9 4.0 477.2 0.0 6.6 NO 477.3 0.0 12.4 NO 477.4 0.0 19.2 NO 477.4 0.0 22.3 NO OTHR11620 C Other 431.1 435.3 4.2 432.0 0.0 16.9 NO 432.0 0.0 26.3 NO 432.1 0.0 40.5 NO 432.1 0.0 41.3 NO OTHR11621 C Other 390.2 394.2 4.0 391.0 0.0 16.9 NO 391.2 0.0 26.2 NO 391.3 0.0 35.4 NO 391.4 0.0 37.1 NO OTHR11622 C Other 355.1 359.3 4.2 368.1 0.0 36.3 YES 374.6 0.0 76.2 YES 377.8 0.0 142.4 YES 379.0 0.0 84.5 YES OTHR11623 C Other 611.5 615.5 4.0 611.9 0.0 1.0 NO 612.0 0.0 1.7 NO 612.2 0.0 2.5 NO 612.2 0.0 2.8 NO OTHR11624 C Other 605.6 609.6 4.0 605.7 0.0 0.7 NO 605.8 0.0 1.4 NO 605.8 0.0 2.1 NO 605.8 0.0 2.4 NO OTHR11625 C Other 647.9 651.9 4.0 647.9 0.0 0.0 NO 647.9 0.0 0.0 NO 647.9 0.0 0.0 NO 647.9 0.0 0.0 NO OTHR11626 C Other 643.6 647.6 4.0 643.7 0.0 0.0 NO 643.7 0.0 0.0 NO 643.7 0.0 0.0 NO 643.7 0.0 0.0 NO OTHR11627 C Other 623.8 627.8 4.0 625.3 0.0 7.7 NO 625.6 0.0 13.4 NO 625.8 0.0 20.2 NO 625.9 0.0 23.0 NO OTHR11628 C Other 612.4 616.4 4.0 614.2 0.0 7.3 NO 614.5 0.0 12.9 NO 614.8 0.0 19.5 NO 614.9 0.0 22.2 NO OTHR11629 C Other 600.9 604.9 4.0 601.8 0.0 7.1 NO 602.0 0.0 12.3 NO 602.2 0.0 18.5 NO 602.3 0.0 21.2 NO OTHR11630 C Other 589.5 593.5 4.0 589.7 0.0 6.8 NO 589.8 0.0 12.0 NO 589.9 0.0 18.1 NO 589.9 0.0 20.7 NO OTHR11631 C Other 576.0 580.0 4.0 576.8 0.0 28.6 NO 577.0 0.0 51.5 NO 577.2 0.0 74.9 NO 577.3 0.0 84.3 NO OTHR11632 C Other 595.3 599.3 4.0 596.7 0.0 13.2 NO 596.9 0.0 25.0 NO 597.1 0.0 38.2 NO 597.2 0.0 42.0 NO OTHR11633 C Other 590.8 594.8 4.0 591.5 0.0 13.0 NO 591.8 0.0 24.5 NO 591.9 0.0 37.2 NO 592.0 0.0 41.6 NO OTHR11634 C Other 521.3 525.3 4.0 525.9 0.0 351.1 NO 526.8 0.0 592.9 YES 527.7 0.0 895.3 YES 528.0 0.0 1028.9 YES OTHR11635 C Other 519.3 523.3 4.0 524.0 0.0 350.8 NO 524.7 0.0 592.3 YES 525.3 0.0 894.9 YES 525.6 0.0 1028.4 YES OTHR11636 C Other 515.0 519.0 4.0 517.0 0.0 402.6 NO 517.4 0.0 591.4 NO 517.8 0.0 893.4 NO 517.9 0.0 1027.2 NO OTHR11637 C Other 587.3 591.3 4.0 588.8 0.0 34.1 NO 589.1 0.0 56.0 NO 589.3 0.0 82.4 NO 589.4 0.0 92.4 NO OTHR11638 C Other 582.2 586.2 4.0 583.4 0.0 34.9 NO 583.6 0.0 56.9 NO 583.9 0.0 83.5 NO 584.0 0.0 93.8 NO OTHR11639 C Other 577.2 581.2 4.0 577.8 0.0 32.7 NO 578.0 0.0 53.9 NO 578.1 0.0 78.9 NO 578.2 0.0 89.6 NO OTHR11640 C Other 569.4 573.4 4.0 572.8 0.0 414.0 NO 573.7 0.0 675.2 NO 574.2 0.0 1286.9 NO 574.4 0.0 1374.1 NO OTHR11641 C Other 566.7 570.7 4.0 569.6 0.0 310.1 NO 570.4 0.0 517.5 NO 570.9 0.0 802.4 NO 571.2 0.0 893.3 NO OTHR11642 C Other 564.0 568.0 4.0 567.4 0.0 291.2 NO 568.1 0.0 505.4 NO 568.6 0.0 758.9 NO 568.9 0.0 869.2 NO OTHR11643 C Other 561.4 565.4 4.0 563.5 0.0 287.5 NO 563.9 0.0 499.4 NO 564.3 0.0 750.2 NO 564.4 0.0 859.9 NO OTHR11644 C Other 585.4 589.4 4.0 586.8 0.0 19.0 NO 587.2 0.0 34.9 NO 587.5 0.0 53.1 NO 587.5 0.0 60.7 NO OTHR11645 C Other 582.8 586.8 4.0 584.3 0.0 18.2 NO 584.7 0.0 33.6 NO 585.1 0.0 52.1 NO 585.3 0.0 59.7 NO OTHR11646 C Other 580.3 584.3 4.0 581.9 0.0 17.8 NO 582.3 0.0 32.7 NO 582.7 0.0 49.4 NO 582.8 0.0 56.8 NO OTHR11647 C Other 577.7 581.7 4.0 579.0 0.0 17.8 NO 579.3 0.0 32.6 NO 579.7 0.0 49.2 NO 579.8 0.0 56.5 NO OTHR11648 C Other 359.3 363.3 4.0 368.1 0.0 297.9 YES 374.6 0.0 464.1 YES 377.8 0.0 561.9 YES 379.0 0.0 683.9 YES OTHR11649 C Other 357.7 361.7 4.0 368.1 0.0 266.0 YES 374.6 0.0 366.4 YES 377.8 0.0 511.4 YES 379.0 0.0 633.1 YES OTHR11650 C Other 417.7 421.7 4.0 418.5 0.0 21.4 NO 418.7 0.0 38.3 NO 418.9 0.0 56.5 NO 419.0 0.0 64.2 NO

APPENDIX E
EXISTING JUNCTIONS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 131 of 132 April 2019 Facility ID Sub
Watershed
Original
Facility ID Type
Invert
Elevation
(feet)
Rim
Elevation
(feet)
Depth
(feet)
Max.

HGL
(2-year)
(feet)
Max.

Lateral
Inflow
(2-year)
(cfs)
Max.

Total
Inflow
(2-year)
(cfs)
Surcharging
(2-year)
Max. HGL
(10-year)
(feet)
Max.

Lateral
Inflow
(10-year)
(cfs)
Max.

Total
Inflow
(10-year)
(cfs)
Surcharging
(10-year)
Max. HGL
(50-year)
(feet)
Max.

Lateral
Inflow
(50-year)
(cfs)
Max. Total
Inflow
(50-year)
(cfs)
Surcharging
(50-year)
Max. HGL
(100-year)
(feet)
Max.

Lateral
Inflow
(100-year)
(cfs)
Max. Total
Inflow
(100-year)
(cfs)
Surcharging
(100-year)
Existing Condition Junctions Summary table
Dimensions 2-year 10-year 50-year 100-year
OTHR11651 C Other 406.0 410.0 4.0 407.3 0.0 21.2 NO 407.7 0.0 38.0 NO 408.0 0.0 56.2 NO 408.2 0.0 63.9 NO OTHR11652 C Other 394.4 398.4 4.0 394.9 0.0 20.3 NO 395.0 0.0 37.0 NO 395.2 0.0 54.5 NO 395.2 0.0 62.3 NO OTHR11653 C Other 400.7 404.7 4.0 403.1 0.0 261.5 NO 403.7 0.0 461.0 NO 404.1 0.0 625.5 NO 404.2 0.0 672.3 NO OTHR11654 C Other 396.4 400.4 4.0 399.6 0.0 260.1 NO 400.2 0.0 460.6 NO 400.6 0.0 625.1 NO 400.7 0.0 672.1 NO OTHR11655 C Other 392.1 396.1 4.0 393.9 0.0 259.4 NO 394.4 0.0 460.3 NO 394.8 0.0 625.0 NO 394.9 0.0 672.2 NO OTHR11656 C Other 506.3 510.3 4.0 507.9 0.0 49.9 NO 508.4 0.0 86.8 NO 508.8 0.0 123.0 NO 508.9 0.0 133.2 NO OTHR11657 C Other 501.0 505.0 4.0 503.2 0.0 49.8 NO 503.8 0.0 86.6 NO 504.2 0.0 122.8 NO 504.3 0.0 133.2 NO OTHR11658 C Other 495.6 499.6 4.0 498.2 0.0 49.2 NO 498.9 0.0 86.2 NO 499.5 0.0 122.3 NO 499.6 0.0 132.9 NO OTHR11659 C Other 490.2 494.2 4.0 492.0 0.0 49.0 NO 492.5 0.0 85.9 NO 492.8 0.0 121.9 NO 492.9 0.0 132.7 NO OTHR11660 C Other 484.9 488.9 4.0 487.3 0.0 48.7 NO 488.0 0.0 85.7 NO 488.5 0.0 121.8 NO 488.6 0.0 132.6 NO OTHR11661 C Other 479.5 483.5 4.0 481.9 0.0 48.6 NO 482.5 0.0 85.5 NO 482.9 0.0 121.5 NO 483.0 0.0 132.4 NO OTHR11662 C Other 474.2 478.2 4.0 475.8 0.0 48.4 NO 476.2 0.0 85.4 NO 476.5 0.0 121.4 NO 476.6 0.0 132.3 NO OTHR11663 C Other 468.8 472.8 4.0 470.3 0.0 48.5 NO 470.8 0.0 85.2 NO 471.2 0.0 121.2 NO 471.4 0.0 132.2 NO OTHR11664 C Other 463.4 467.4 4.0 464.5 0.0 48.3 NO 464.8 0.0 85.0 NO 465.0 0.0 121.0 NO 465.1 0.0 132.1 NO OTHR11665 C Other 405.8 409.8 4.0 410.4 0.0 66.0 NO 411.3 0.0 128.8 YES 411.7 0.0 188.0 YES 411.8 0.0 209.5 YES OTHR11666 C Other 405.7 409.7 4.0 410.4 0.0 116.9 NO 411.2 0.0 124.7 YES 411.6 0.0 186.1 YES 411.7 0.0 207.8 YES OTHR11667 C Other 405.5 409.5 4.0 410.4 0.0 136.9 NO 411.2 0.0 124.3 YES 411.6 0.0 184.9 YES 411.7 0.0 206.7 YES OTHR11668 C Other 375.8 379.8 4.0 381.0 0.0 276.3 YES 382.4 0.0 493.8 YES 383.5 0.0 675.1 YES 383.8 0.0 741.2 YES OTHR11669 C Other 374.1 378.1 4.0 380.3 0.0 275.7 YES 381.5 0.0 493.6 YES 382.3 0.0 673.6 YES 382.4 0.0 742.2 YES OTHR11670 C Other 372.3 376.3 4.0 380.3 0.0 274.6 YES 381.4 0.0 493.1 YES 382.2 0.0 670.1 YES 382.3 0.0 744.7 YES OTHR11671 C Other 370.6 374.6 4.0 375.0 0.0 274.4 NO 376.4 0.0 492.9 YES 378.5 0.0 666.8 YES 379.6 0.0 747.5 YES OTHR11672 C Other 368.9 372.9 4.0 373.4 0.0 274.3 NO 374.8 0.0 492.8 YES 378.1 0.0 659.8 YES 379.3 0.0 738.9 YES OTHR11673 C Other 367.1 371.1 4.0 370.6 0.0 274.2 NO 374.6 0.0 492.8 YES 377.9 0.0 647.1 YES 379.1 0.0 726.6 YES OTHR11674 C Other 365.4 369.4 4.0 369.2 0.0 274.1 NO 374.6 0.0 491.6 YES 377.9 0.0 625.0 YES 379.0 0.0 712.2 YES OTHR11675 C Other 363.6 367.6 4.0 368.3 0.0 273.7 NO 374.6 0.0 484.5 YES 377.8 0.0 596.4 YES 379.0 0.0 697.0 YES OTHR11676 C Other 405.4 409.4 4.0 407.2 0.0 61.8 NO 407.7 0.0 109.4 NO 408.1 0.0 156.5 NO 408.1 0.0 173.6 NO OTHR11677 C Other 408.3 412.3 4.0 409.7 0.0 51.1 NO 410.1 0.0 90.2 NO 410.3 0.0 127.3 NO 410.4 0.0 139.6 NO CLEN11552 C ZCO10037 Cleanout 535.6 550.6 15.0 536.6 0.0 47.4 NO 536.9 0.0 70.2 NO 537.0 0.0 86.1 NO 537.0 0.0 87.7 NO OTHR11678 C ZOTHER11453Other 343.4 347.4 4.0 368.0 1.3 1933.3 YES 374.4 2.1 2016.4 YES 375.4 3.2 2864.6 YES 375.4 3.7 2916.1 YES OTHR11679 C Other 530.2 534.2 4.0 535.3 0.0 351.9 YES 536.2 0.0 595.1 YES 537.2 0.0 898.4 YES 537.5 0.0 1031.7 YES OTHR11680 C Other 527.9 531.9 4.0 533.6 0.0 351.4 YES 534.3 0.0 594.0 YES 535.0 0.0 897.0 YES 535.3 0.0 1030.3 YES OTHR11681 C Other 523.6 527.6 4.0 527.5 0.0 351.3 NO 528.2 0.0 593.1 NO 528.9 0.0 895.8 YES 529.2 0.0 1029.7 YES OTHR11682 C Other 564.0 568.0 4.0 567.5 0.0 338.5 NO 568.4 0.0 576.0 NO 569.3 0.0 869.5 YES 569.5 0.0 996.8 YES OTHR11683 C Other 541.8 545.8 4.0 547.5 0.0 338.2 YES 548.7 0.0 575.2 YES 549.7 0.0 868.6 YES 550.1 0.0 996.1 YES OTHR11684 C Other 535.9 539.9 4.0 541.3 0.0 337.8 YES 542.3 0.0 574.4 YES 543.3 0.0 867.3 YES 543.7 0.0 995.3 YES OTHR11685 C Other 531.8 535.8 4.0 537.0 0.0 337.9 YES 538.1 0.0 573.1 YES 539.1 0.0 865.7 YES 539.5 0.0 994.5 YES INLT10947 C ZINL10040 Inlet 546.5 550.5 4.0 547.0 0.0 18.3 NO 548.7 0.0 30.7 NO 550.4 0.0 45.5 NO 552.3 0.0 51.6 YES CLEN11553 C ZCO13061 Cleanout 541.4 545.4 4.0 542.5 0.0 13.7 NO 542.7 0.0 16.0 NO 542.9 0.0 17.9 NO 542.7 0.0 15.6 NO INLT10948 C ZINL12233 Inlet 547.7 551.7 4.0 547.7 0.0 0.0 NO 548.7 0.0 6.6 NO 550.4 0.0 10.8 NO 552.3 0.0 10.5 NO DETB10017 C ZBAS10006 Detention Basin 545.3 549.3 4.0 546.9 0.0 18.3 NO 548.7 0.0 31.0 NO 550.4 0.0 42.7 YES 552.3 0.0 43.5 YES CBIN11883 C CI10603 Curb Inlet 549.6 553.9 4.2 549.6 0.0 0.0 NO 549.6 0.0 0.0 NO 550.5 0.0 0.7 NO 553.9 0.0 2.1 NO OTHR11686 C Other 346.3 350.3 4.0 368.0 0.0 1629.6 YES 374.4 0.0 1536.3 YES 375.4 0.0 2300.2 YES 375.4 0.0 2177.3 YES OTHR11687 C Other 475.1 479.1 4.0 477.5 0.0 97.6 NO 481.8 0.0 173.9 YES 489.6 0.0 242.2 YES 492.6 0.0 274.0 YES OTHR11688 C Other 465.2 469.2 4.0 472.0 0.0 96.9 YES 481.8 0.0 172.6 YES 489.6 0.0 234.7 YES 492.6 0.0 247.5 YES OTHR11689 C Other 455.2 459.2 4.0 472.0 0.0 96.0 YES 481.8 0.0 110.4 YES 489.6 0.0 132.3 YES 492.6 0.0 138.7 YES OTHR11690 C Other 393.5 397.5 4.0 394.6 3.6 50.6 NO 394.8 5.8 74.5 NO 395.0 8.5 101.2 NO 395.1 9.7 113.0 NO OTHR11691 C Other 354.3 358.3 4.0 357.0 22.0 126.7 NO 357.6 40.7 208.1 NO 358.2 61.1 296.0 NO 358.3 70.2 334.6 NO OTHR11692 C Other 386.9 390.9 4.0 389.1 0.0 50.6 NO 389.5 0.0 74.5 NO 389.8 0.0 101.1 NO 389.9 0.0 112.9 NO OTHR11693 C Other 380.4 384.4 4.0 382.8 0.0 50.5 NO 383.4 0.0 74.3 NO 383.6 0.0 100.9 NO 383.6 0.0 112.6 NO

APPENDIX E
EXISTING JUNCTIONS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 132 of 132 April 2019 Facility ID Sub
Watershed
Original
Facility ID Type
Invert
Elevation
(feet)
Rim
Elevation
(feet)
Depth
(feet)
Max.

HGL
(2-year)
(feet)
Max.

Lateral
Inflow
(2-year)
(cfs)
Max.

Total
Inflow
(2-year)
(cfs)
Surcharging
(2-year)
Max. HGL
(10-year)
(feet)
Max.

Lateral
Inflow
(10-year)
(cfs)
Max.

Total
Inflow
(10-year)
(cfs)
Surcharging
(10-year)
Max. HGL
(50-year)
(feet)
Max.

Lateral
Inflow
(50-year)
(cfs)
Max. Total
Inflow
(50-year)
(cfs)
Surcharging
(50-year)
Max. HGL
(100-year)
(feet)
Max.

Lateral
Inflow
(100-year)
(cfs)
Max. Total
Inflow
(100-year)
(cfs)
Surcharging
(100-year)
Existing Condition Junctions Summary table
Dimensions 2-year 10-year 50-year 100-year
OTHR11694 C Other 373.9 377.9 4.0 375.7 0.0 50.3 NO 376.1 0.0 72.1 NO 376.5 0.0 105.6 NO 376.6 0.0 115.9 NO OTHR11695 C Other 367.3 371.3 4.0 370.4 0.0 50.2 NO 371.0 0.0 71.6 NO 371.5 0.0 103.1 NO 371.7 0.0 114.0 NO OTHR11696 C Other 360.8 364.8 4.0 361.9 0.0 49.9 NO 362.1 0.0 71.1 NO 362.3 0.0 100.8 NO 362.4 0.0 112.0 NO OTHR11697 C Other 348.8 352.8 4.0 352.2 0.0 125.8 NO 353.0 0.0 206.3 NO 353.7 0.0 294.6 NO 353.9 0.0 332.9 YES OTHR11698 C Other 343.4 347.4 4.0 346.4 0.0 125.9 NO 347.0 0.0 206.6 NO 347.6 0.0 295.3 NO 347.8 0.0 333.4 NO OTHR11699 Other 674.6 682.3 7.7 674.6 0.0 98.7 NO 674.6 0.0 167.6 NO 674.6 0.0 243.8 NO 674.6 0.0 285.8 NO OTHR11700 Other 676.3 684.4 8.1 678.6 0.0 98.7 NO 679.2 0.0 167.8 NO 679.9 0.0 244.5 NO 680.3 0.0 286.0 NO OTHR11701 Other 667.8 694.3 26.5 679.4 0.0 98.7 NO 680.2 0.0 167.8 NO 680.9 0.0 246.8 NO 681.3 0.0 286.1 NO OTHR11702 Other 681.1 687.8 6.7 683.2 88.1 88.1 NO 684.1 153.3 153.3 NO 687.8 233.3 233.3 NO 688.3 270.0 270.0 NO OTHR11703 Other 667.9 688.4 20.5 679.7 0.0 23.1 NO 680.9 0.0 37.3 NO 682.8 0.0 54.8 NO 683.7 0.0 63.0 NO OTHR11704 Other 682.7 687.5 4.8 684.3 0.0 23.1 NO 684.8 0.0 37.3 NO 685.3 0.0 55.0 NO 685.6 0.0 63.3 NO OTHR11705 Other 684.9 693.2 8.3 684.9 0.0 0.0 NO 684.9 0.0 0.0 NO 686.6 0.0 12.2 NO 688.4 0.0 17.6 NO OTHR11706 Other 691.3 699.5 8.2 691.3 0.0 0.0 NO 691.3 0.0 0.0 NO 691.3 0.0 0.0 NO 691.3 0.0 0.0 NO OTHR11707 Other 688.0 694.6 6.6 689.2 0.0 23.2 NO 689.5 0.0 37.7 NO 689.9 0.0 55.2 NO 690.2 0.0 63.0 NO OTHR11708 Other 695.6 702.7 7.1 696.5 0.0 23.2 NO 696.8 0.0 37.7 NO 697.0 0.0 55.3 NO 697.1 0.0 63.4 NO OTHR11709 Other 696.2 706.1 9.9 697.4 0.0 23.2 NO 697.9 0.0 37.7 NO 698.4 0.0 55.3 NO 698.7 0.0 63.1 NO OTHR11710 Other 697.2 703.9 6.6 698.8 0.0 23.1 NO 699.3 0.0 37.5 NO 700.0 0.0 55.9 NO 700.6 0.0 65.3 NO OTHR11711 Other 699.0 707.5 8.5 700.7 0.0 23.6 NO 701.3 0.0 38.3 NO 707.5 0.0 57.4 NO 707.5 0.0 76.9 NO OTHR11712 Other 699.4 708.0 8.7 702.4 0.0 23.6 NO 702.6 0.0 38.3 NO 703.4 0.0 57.2 NO 704.3 0.0 67.1 NO OTHR11713 Other 700.4 708.7 8.4 702.4 0.0 23.6 NO 702.7 0.0 38.2 NO 703.6 0.0 57.3 NO 704.6 0.0 64.6 NO OTHR11714 Other 705.5 714.7 9.3 706.6 0.0 23.5 NO 706.9 0.0 38.1 NO 707.3 0.0 57.0 NO 707.5 0.0 64.3 NO OTHR11715 Other 716.5 725.5 9.0 717.5 24.0 24.0 NO 717.8 38.7 38.7 NO 718.2 58.0 58.0 NO 718.4 65.5 65.5 NO OTHR11716 Other 718.5 728.3 9.8 718.5 0.0 0.0 NO 718.5 0.0 0.0 NO 718.5 0.0 0.0 NO 718.5 0.0 0.0 NO OTHR11717 Other 672.5 678.4 5.9 678.6 0.0 98.2 NO 678.8 0.0 167.0 NO 681.0 0.0 300.2 YES 682.3 0.0 308.0 YES OTHR11718 Other 672.6 678.4 5.8 672.6 0.0 98.2 NO 672.6 0.0 167.0 NO 672.6 0.0 298.9 NO 672.6 0.0 306.7 NO OTHR11719 Other 671.8 677.1 5.3 677.7 0.0 179.3 NO 678.5 0.0 197.5 YES 680.8 0.0 237.8 YES 682.0 0.0 285.0 YES OTHR11720 Other 674.5 682.0 7.5 676.9 0.0 98.7 NO 678.0 0.0 167.6 NO 682.1 0.0 243.8 NO 682.1 0.0 285.8 NO OTHR11721 A2 ZOTHER10196Other 631.0 641.0 10.0 631.0 0.0 0.0 NO 631.0 0.0 0.0 NO 631.9 0.0 0.9 NO 641.1 0.0 1.1 NO OTHR11722 Other 611.6 614.4 2.8 612.2 0.0 158.2 NO 612.4 0.0 283.3 NO 612.6 0.0 510.3 NO 612.7 0.0 587.9 NO OTHR11723 Other 608.9 611.7 2.8 609.8 0.0 156.3 NO 609.9 0.0 281.9 NO 610.1 0.0 508.4 NO 610.2 0.0 587.1 NO OTHR11724 Other 606.3 609.1 2.8 606.8 0.0 155.4 NO 606.9 0.0 282.3 NO 607.0 0.0 509.1 NO 607.1 0.0 588.7 NO OTHR11725 Other 603.6 606.4 2.8 604.1 0.0 156.2 NO 604.3 0.0 285.4 NO 605.5 0.0 508.5 NO 606.0 0.0 588.0 NO CBIN11884 C CI1580 Curb Inlet 503.9 511.7 7.7 503.9 0.0 0.0 NO 504.4 0.0 0.5 NO 513.3 0.0 7.6 YES 513.8 0.0 7.1 YES CBIN11885 C CI1581 Curb Inlet 523.7 530.7 7.0 524.7 0.0 26.6 NO 525.1 0.0 47.2 NO 532.4 0.0 60.5 YES 533.3 0.0 60.5 YES CLEN11554 C ZCO10913 Cleanout 501.6 511.7 10.1 502.7 3.0 29.1 NO 504.4 4.6 51.1 NO 513.3 6.6 74.7 YES 513.8 7.5 72.6 YES INLT10949 C INL065 Inlet 550.4 550.4 0.0 550.8 3.4 3.4 NO 551.0 5.8 5.8 NO 560.3 8.8 8.8 YES 563.6 10.1 10.7 YES INLT10950 C ZINL10912 Inlet 539.4 555.5 16.2 540.5 6.6 26.7 NO 541.1 10.6 47.6 NO 556.1 15.5 69.0 NO 557.1 17.5 75.9 YES OTHR11726 C ZOTHER10836Other 550.6 556.6 6.0 550.6 0.0 0.0 NO 550.6 0.0 0.0 NO 556.6 0.0 1.3 NO 557.2 0.0 4.9 NO CBIN11886 C CI1582 Curb Inlet 541.7 556.5 14.9 542.7 0.0 20.1 NO 543.3 0.0 37.1 NO 559.9 0.0 56.8 YES 563.0 0.0 62.5 YES OTHR11727 C ZOTHER10835Other 497.3 508.8 11.5 498.3 0.0 29.1 NO 498.8 0.0 50.8 NO 508.9 0.0 71.7 NO 508.8 0.0 70.5 NO OTHR11728 C Other 549.3 556.2 6.9 549.7 16.8 20.1 NO 549.8 31.3 37.1 NO 560.2 52.3 60.0 YES 563.5 61.1 66.3 YES CBIN11887 C CI1570 Curb Inlet 500.7 506.4 5.7 501.2 5.3 5.3 NO 501.3 8.9 8.9 NO 506.9 13.3 17.1 NO 506.7 15.2 17.7 NO CBIN11888 C CI1579 Curb Inlet 502.2 506.6 4.4 502.2 0.0 0.0 NO 502.2 0.0 0.0 NO 507.1 0.0 7.8 NO 506.8 0.0 7.0 NO OTHR11729 Other 580.8 586.8 6.0 580.8 0.0 0.0 NO 580.8 0.0 0.0 NO 580.8 0.0 0.0 NO 580.8 0.0 0.0 NO OTHR11730 Other 582.8 588.8 6.0 582.8 0.0 0.0 NO 582.8 0.0 0.0 NO 582.8 0.0 0.0 NO 582.8 0.0 0.0 NO LUGG10001 Lug 550.9 556.9 6.0 550.9 0.0 0.0 NO 550.9 0.0 0.0 NO 556.9 0.0 12.7 NO 556.9 0.0 19.2 NO INLT10951 A2 ZINL10406 Inlet 639.8 643.8 4.0 639.9 1.8 23.1 NO 639.9 3.0 41.6 NO 639.9 4.4 64.3 NO 639.9 5.0 73.7 NO OTHR11731 Other 543.0 552.1 9.1 547.1 0.0 0.0 NO 547.1 0.0 0.0 NO 547.1 0.0 0.0 NO 543.1 0.0 3.1 NO OTHR11732 Other 539.8 544.8 5.0 539.8 0.0 0.0 NO 539.8 0.0 0.0 NO 539.8 0.0 0.0 NO 540.1 0.0 3.3 NO

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 1 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
PIPE10442 A1 ZPIP14809 1.5 0 1 CIRCULAR 0.000 RCP 6.5 6.2 None 7.64 11.5 11.4 None 17.2 12.5 Upstream 19.8 14.5 Upstream CULV10023 A1 CUL012 2 1.5 1 ARCH 0.003 CMP 82.8 38.2 Upstream 6.46 114.6 47.5 Upstream 136.9 54.9 Upstream 145.3 57.8 Upstream PIPE10568 A1 ZPIP18037 2 0 1 CIRCULAR 0.011 RCP 63.5 62.1 Upstream 2.61 122.8 117.1 Both Upstream and Downstream 190.3 177.4 Both Upstream and Downstream 221.9 207.1 Both Upstream and Downstream PIPE10440 A1 ZPIP11312 1.5 0 1 CIRCULAR 0.000 RCP 6.5 6.4 None 2.99 11.7 11.3 None 18.0 13.7 Both Upstream and Downstream 20.2 15.0 Both Upstream and Downstream PIPE10648 A1 ZPIP17130 1.75 0 1 CIRCULAR 0.010 RCP 27.8 27.7 None 1.77 49.2 49.1 None 75.0 74.5 None 86.4 83.3 None CULV10010 A1 CUL023 4.5 0 1 CIRCULAR 0.005 RCP 139.2 139.1 Upstream 1 330.9 608.9 Upstream 541.2 652.1 Upstream 642.0 678.6 Upstream PIPE10579 A1 ZPIP11997 2 0 1 CIRCULAR 0.035 CMP 60.5 53.8 Upstream 2.36 116.9 80.9 Upstream 206.5 101.0 Both Upstream and Downstream 236.3 106.9 Both Upstream and Downstream PIPE10541 A1 ZPIP17553 1.5 0 1 CIRCULAR 0.002 HDPE 3.5 3.5 None 0.73 10.9 9.7 None 22.2 17.2 Upstream 27.2 20.9 Upstream PIPE10126 A1 ZPIP13609 1.5 0 1 CIRCULAR 0.005 RCP 14.3 14.2 None 1.85 22.0 22.0 Upstream 35.3 29.9 Both Upstream and Downstream 37.2 33.2 Both Upstream and Downstream PIPE10569 A1 ZPIP18038 3.5 0 1 CIRCULAR 0.004 RCP 77.1 77.8 None 1.3 162.5 140.6 Both Upstream and Downstream 258.8 209.0 Both Upstream and Downstream 291.7 242.8 Both Upstream and Downstream CULV10035 A1 CUL027 2 0 1 CIRCULAR 0.062 RCP 50.7 50.7 Upstream 0.9 118.9 118.8 Upstream 197.7 190.6 Upstream 227.4 227.2 Upstream PIPE10395 A1 ZPIP14329 1.5 0 1 CIRCULAR 0.005 RCP 13.7 14.6 None 2.05 23.8 19.3 None 34.2 25.9 Both Upstream and Downstream 38.6 26.5 Both Upstream and Downstream PIPE10554 A1 ZPIP15897 2 0 1 CIRCULAR 0.011 RCP 29.9 31.8 Both Upstream and Downstream 1.35 54.1 52.0 Both Upstream and Downstream 85.0 76.3 Both Upstream and Downstream 97.5 87.5 Both Upstream and Downstream PIPE10665 A1 ZPIP11698 1.5 0 1 CIRCULAR 0.005 RCP 9.0 9.0 None 1.21 15.1 15.1 None 22.7 22.7 None 26.0 27.3 None PIPE10591 A1 ZPIP16594 2 0 1 CIRCULAR 0.011 RCP 31.2 35.8 Upstream 1.52 55.9 51.4 Both Upstream and Downstream 83.9 72.6 Both Upstream and Downstream 97.1 82.3 Both Upstream and Downstream PIPE10297 A1 ZPIP10849 2.5 0 1 CIRCULAR 0.002 RCP 19.6 18.6 None 1.06 43.4 38.3 None 68.6 55.1 None 79.3 59.1 None CULV10029 A1 ZCUL11178 2 1.5 1 ARCH 0.037 CMP 59.6 65.0 Upstream 3.27 172.1 61.6 Both Upstream and Downstream 173.2 62.3 Both Upstream and Downstream 166.1 66.3 Both Upstream and Downstream CULV10028 A1 ZCUL10325 2 5 1 RECT_CLOSED 0.005 RCP 56.8 58.3 None 0.88 90.8 101.0 None 130.9 195.3 None 147.8 211.2 None PIPE10426 A1 ZPIP11289 2 0 1 CIRCULAR 0.011 RCP 31.4 35.7 None 1.52 56.2 48.9 Upstream 84.2 66.1 Upstream 97.5 73.9 Upstream PIPE10626 A1 ZPIP17005 1.5 0 1 CIRCULAR 0.010 ABS 14.1 15.8 None 1.51 22.0 19.7 Both Upstream and Downstream 31.6 27.1 Both Upstream and Downstream 35.9 30.4 Both Upstream and Downstream PIPE10490 A1 ZPIP17381 3.5 0 1 CIRCULAR 0.007 RCP 76.5 74.3 None 0.87 150.8 144.6 Both Upstream and Downstream 239.1 206.6 Both Upstream and Downstream 279.5 238.9 Both Upstream and Downstream PIPE10086 A1 ZPIP13539 2 0 1 CIRCULAR 0.004 RCP 7.4 7.8 None 0.53 13.3 11.8 None 21.1 39.4 None 23.4 40.8 Both Upstream and Downstream PIPE10316 A1 ZPIP13989 2 0 1 CIRCULAR 0.007 RCP 44.2 27.9 None 1.44 74.2 38.1 Upstream 110.3 48.8 Both Upstream and Downstream 125.0 54.0 Both Upstream and Downstream PIPE10443 A1 ZPIP14810 3.5 0 1 CIRCULAR 0.007 RCP 76.5 74.7 None 0.86 151.5 140.9 Both Upstream and Downstream 239.5 207.7 Both Upstream and Downstream 280.6 240.7 Both Upstream and Downstream PIPE10492 A1 ZPIP17383 3.5 0 1 CIRCULAR 0.007 RCP 76.5 74.2 None 0.86 151.0 141.7 Both Upstream and Downstream 237.7 207.0 Both Upstream and Downstream 276.2 239.6 Both Upstream and Downstream PIPE10491 A1 ZPIP17382 3.5 0 1 CIRCULAR 0.007 RCP 76.5 74.4 None 0.86 150.8 143.0 Both Upstream and Downstream 239.6 206.7 Both Upstream and Downstream 280.6 239.1 Both Upstream and Downstream PIPE10528 A1 ZPIP11736 1.5 0 1 CIRCULAR 0.005 PVC 0.0 0.0 None 0 0.0 6.7 None 0.0 16.0 Upstream 0.0 19.6 Both Upstream and Downstream PIPE10251 A1 ZPIP13785 2.5 0 1 CIRCULAR 0.005 RCP 22.6 21.6 None 0.76 33.7 45.9 None 50.6 73.2 Both Upstream and Downstream 65.9 76.0 Both Upstream and Downstream PIPE10633 A1 ZPIP15950 1.5 0 1 CIRCULAR 0.009 RCP 5.4 5.2 None 0.51 8.8 14.4 None 37.3 24.3 Both Upstream and Downstream 78.6 26.9 Both Upstream and Downstream PIPE10348 A1 ZPIP10956 2.25 0 1 CIRCULAR 0.004 RCP 21.3 21.3 None 1.09 37.8 36.3 None 57.4 49.3 Upstream 65.6 51.4 Both Upstream and Downstream PIPE10136 A1 ZPIP10692 1.5 0 1 CIRCULAR 0.009 RCP 11.4 11.3 None 1.12 17.9 17.5 None 26.1 24.4 None 29.5 25.7 Upstream PIPE10137 A1 ZPIP10693 1.5 0 1 CIRCULAR 0.010 RCP 11.4 11.3 None 1.1 18.0 17.6 None 26.2 24.4 None 29.5 25.7 None PIPE10141 A1 ZPIP13625 2.5 0 1 CIRCULAR 0.002 CIPCP 10.9 11.0 None 0.69 17.8 17.8 None 26.6 34.8 None 30.0 39.6 None PIPE10634 A1 ZPIP11909 1.5 0 1 CIRCULAR 0.011 RCP 12.8 10.0 None 0.89 19.0 19.9 Upstream 27.4 25.9 Upstream 31.5 27.3 Both Upstream and Downstream PIPE10534 A1 ZPIP15620 4 0 1 CIRCULAR 0.003 RCP 91.0 89.4 None 1.2 153.2 125.8 None 225.0 169.0 None 255.6 181.2 None PIPE10241 A1 ZPIP10775 1.5 0 1 CIRCULAR 0.014 RCP 8.2 8.1 None 0.65 13.9 14.4 None 22.0 26.9 None 25.4 30.1 Both Upstream and Downstream PIPE10140 A1 ZPIP13624 2.5 0 1 CIRCULAR 0.006 CIPCP 21.0 21.4 None 0.77 35.3 34.8 None 53.0 55.0 None 60.3 66.1 None PIPE10629 A1 ZPIP17636 1.5 0 1 CIRCULAR 0.005 RCP 2.5 2.5 None 0.33 4.2 4.1 None 6.3 11.1 Upstream 7.0 18.4 Both Upstream and Downstream PIPE10635 A1 ZPIP15947 1.5 0 1 CIRCULAR 0.007 RCP 4.8 4.9 None 0.56 8.3 16.5 Both Upstream and Downstream 12.2 17.6 Both Upstream and Downstream 14.0 20.2 Both Upstream and Downstream PIPE10445 A1 ZPIP14814 4 0 1 CIRCULAR 0.006 RCP 84.3 80.5 None 0.72 163.4 162.5 None 255.2 226.2 None 299.6 259.5 None PIPE10444 A1 ZPIP14811 3.5 0 1 CIRCULAR 0.011 RCP 77.2 75.4 None 0.72 151.8 147.2 Upstream 243.8 207.6 Both Upstream and Downstream 292.0 240.0 Both Upstream and Downstream PIPE10250 A1 ZPIP10781 2.5 0 1 CIRCULAR 0.003 RCP 19.1 19.3 None 0.87 31.7 30.5 None 47.5 44.5 Both Upstream and Downstream 54.6 50.7 Both Upstream and Downstream PIPE10132 A1 ZPIP13618 1.5 0 1 CIRCULAR 0.008 RCP 3.3 3.3 None 0.36 5.5 5.5 None 8.2 20.6 None 9.4 20.8 None PIPE10252 A1 ZPIP13786 2.5 0 1 CIRCULAR 0.005 RCP 19.7 19.7 None 0.67 31.7 31.8 None 47.3 64.4 Both Upstream and Downstream 58.6 66.1 Both Upstream and Downstream PIPE10214 A1 ZPIP13732 2 0 1 CIRCULAR 0.005 RCP 12.5 12.5 None 0.79 20.3 20.8 None 30.3 32.1 None 34.4 35.7 None PIPE10374 A1 ZPIP14193 2 0 1 CIRCULAR 0.005 RCP 14.0 14.1 None 0.87 23.5 21.9 None 35.5 35.2 Both Upstream and Downstream 40.5 35.8 Both Upstream and Downstream PIPE10148 A1 ZPIP10703 1.5 0 1 CIRCULAR 0.015 RCP 17.3 17.4 None 1.37 26.7 20.4 Upstream 38.1 25.6 Both Upstream and Downstream 43.4 27.9 Both Upstream and Downstream PIPE10343 A1 ZPIP14124 3 0 1 CIRCULAR 0.004 RCP 37.3 37.3 None 0.9 62.8 58.3 None 95.2 82.9 None 108.1 89.3 None PIPE10519 A1 ZPIP15525 2.25 0 1 CIRCULAR 0.004 RCP 14.6 14.6 None 0.77 24.2 24.2 None 36.2 36.2 None 41.2 40.8 None PIPE10614 A1 ZPIP20011 1.5 0 1 CIRCULAR 0.010 RCP 6.5 6.5 None 0.63 10.1 10.1 None 14.7 24.9 None 16.6 21.7 Upstream PIPE10471 A1 ZPIP14919 4 0 1 CIRCULAR 0.003 RCP 38.7 39.1 None 0.47 78.3 80.3 None 124.1 130.3 None 140.1 172.2 None PIPE10575 A1 ZPIP17650 4 0 1 CIRCULAR 0.006 RCP 77.3 74.8 None 0.65 151.8 147.2 None 239.5 207.9 Upstream 282.8 240.3 Upstream PIPE10668 A1 ZPIP15251 4 0 1 CIRCULAR 0.006 RCP 51.2 51.9 None 0.48 102.2 105.9 None 160.4 212.8 None 184.6 226.0 None PIPE10005 A1 ZPIP10238 1.5 0 1 CIRCULAR 0.011 RCP 11.2 11.1 None 0.99 19.6 16.1 Both Upstream and Downstream 29.1 21.0 Both Upstream and Downstream 33.2 23.3 Both Upstream and Downstream PIPE10349 A1 ZPIP10957 2.25 0 1 CIRCULAR 0.004 RCP 17.9 17.9 None 0.92 31.1 34.8 None 46.7 37.8 Both Upstream and Downstream 53.4 40.0 Both Upstream and Downstream PIPE10661 A1 ZPIP16985 2 0 1 CIRCULAR 0.005 RCP 11.0 11.1 None 0.67 18.7 19.1 None 28.2 30.2 None 32.1 34.0 None PIPE10314 A1 ZPIP10885 2 0 1 CIRCULAR 0.018 RCP 45.5 28.0 None 0.91 76.3 39.8 None 113.8 59.2 Upstream 129.1 62.6 Upstream PIPE10139 A1 ZPIP13623 3 0 1 CIRCULAR 0.012 RCP 48.3 48.2 None 0.65 82.2 81.0 None 125.0 126.5 None 142.0 148.5 None PIPE10315 A1 ZPIP10886 2 0 1 CIRCULAR 0.018 RCP 44.1 27.1 None 0.88 74.0 38.1 None 110.2 55.6 Both Upstream and Downstream 124.9 61.1 Both Upstream and Downstream PIPE10157 A1 ZPIP17010 2 0 1 CIRCULAR 0.005 CIPCP 8.2 8.2 None 0.6 13.7 13.2 None 20.8 22.3 None 23.8 27.3 None PIPE10486 A1 ZPIP14939 4 0 1 CIRCULAR 0.004 RCP 45.9 46.4 None 0.54 92.3 94.5 None 145.6 151.3 None 166.5 170.1 None PIPE10543 A1 ZPIP11818 2.5 0 1 CIRCULAR 0.003 HDPE 11.4 11.9 None 0.5 25.8 23.7 None 43.3 41.2 None 50.9 46.8 None PIPE10375 A1 ZPIP14194 2 0 1 CIRCULAR 0.005 RCP 12.7 12.7 None 0.82 21.3 25.5 None 32.3 32.9 Both Upstream and Downstream 36.8 30.7 Both Upstream and Downstream PIPE10485 A1 ZPIP14938 4 0 1 CIRCULAR 0.004 RCP 45.8 46.4 None 0.52 92.2 94.4 None 145.5 151.3 None 166.4 174.8 None PIPE10012 A1 ZPIP16748 2 0 1 CIRCULAR 0.005 RCP 9.5 9.6 None 0.59 17.5 16.3 None 27.0 26.7 None 31.1 31.7 None PIPE10329 A1 ZPIP14009 1.5 0 1 CIRCULAR 0.026 RCP 9.5 9.6 None 0.56 17.8 17.4 None 28.4 28.0 None 32.7 33.2 None PIPE10669 A1 ZPIP14627 2 0 1 CIRCULAR 0.006 PVC 9.7 9.7 None 0.55 18.9 20.4 None 30.4 34.6 None 36.8 34.0 None CULV10013 A1 CUL077B 3 0 1 CIRCULAR 0.020 RCP 53.1 53.0 None 0.56 100.4 168.0 Upstream 201.0 182.2 Upstream 180.9 184.0 Upstream PIPE10222 A1 ZPIP10756 1.5 0 1 CIRCULAR 0.010 RCP 6.2 6.2 None 0.58 12.0 11.7 None 18.6 19.3 None 21.3 20.2 None PIPE10087 A1 ZPIP10648 2 0 1 CIRCULAR 0.004 RCP 3.5 3.6 None 0.26 5.7 7.3 None 10.1 28.1 Upstream 10.8 26.6 Both Upstream and Downstream PIPE10450 A1 ZPIP14816 2 0 1 CIRCULAR 0.007 ABS 8.8 8.8 None 0.48 14.4 14.2 None 21.4 30.7 None 24.4 33.9 None PIPE10540 A1 ZPIP11780A 4 0 1 CIRCULAR 0.004 RCP 89.3 87.8 None 0.92 150.6 123.8 None 221.3 169.1 None 251.4 176.9 None PIPE10460 A1 ZPIP17260 2.5 0 1 CIRCULAR 0.006 ABS 20.7 20.6 None 0.63 34.5 33.9 None 52.0 51.8 None 59.3 60.5 None PIPE10318 A1 ZPIP13991 2 0 1 CIRCULAR 0.011 RCP 1.3 17.9 None 0.76 2.1 31.9 None 3.2 38.7 Both Upstream and Downstream 3.6 43.5 Both Upstream and Downstream PIPE10049 A1 ZPIP10619 2.5 0 1 CIRCULAR 0.009 CIPCP 21.9 22.2 None 0.66 36.7 35.9 None 55.2 52.0 None 62.8 61.7 None PIPE10109 A1 ZPIP13562 4.5 0 1 CIRCULAR 0.005 RCP 77.7 77.7 None 0.57 158.2 173.3 None 246.8 242.9 None 286.4 250.6 Downstream Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 2 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE10501 A1 ZPIP15252 4 0 1 CIRCULAR 0.005 RCP 51.3 51.9 None 0.49 102.2 104.9 None 160.6 168.7 None 184.9 190.2 None PIPE10536 A1 ZPIP15622 1.5 0 1 CIRCULAR 0.024 RCP 5.8 5.8 None 0.36 14.3 14.3 None 23.3 23.4 None 27.2 29.4 None PIPE10613 A1 ZPIP11780B 4 0 1 CIRCULAR 0.004 RCP 82.9 81.8 None 0.86 140.7 116.6 None 207.0 185.0 None 234.8 171.7 None PIPE10525 A1 ZPIP11733 1.5 0 1 CIRCULAR 0.010 RCP 0.0 2.0 None 0.2 0.2 6.0 None 0.9 16.6 None 1.1 18.4 Upstream PIPE10082 A1 ZPIP10644 3 0 1 CIRCULAR 0.010 RCP 39.4 39.4 None 0.6 66.4 65.4 None 100.0 101.5 None 113.6 116.7 None PIPE10351 A1 ZPIP14128 2 0 1 CIRCULAR 0.004 RCP 11.7 11.7 None 0.81 20.1 23.4 None 29.8 24.6 Both Upstream and Downstream 34.0 25.7 Both Upstream and Downstream PIPE10376 A1 ZPIP14196 3 0 1 CIRCULAR 0.004 RCP 16.3 15.4 None 0.36 24.4 28.6 None 36.8 64.8 Upstream 41.7 75.3 Both Upstream and Downstream PIPE10495 A1 ZPIP11531 6.5 0 1 CIRCULAR 0.004 RCP 293.3 335.2 None 1.03 434.3 519.6 None 566.5 522.2 None 623.6 581.1 None PIPE10181 A1 ZPIP17021 4 0 1 CIRCULAR 0.005 CIPCP 51.5 52.1 None 0.6 87.8 87.9 None 130.6 126.7 None 148.9 154.4 None PIPE10301 A1 ZPIP13918 2 0 1 CIRCULAR 0.020 RCP 16.5 16.4 None 0.51 35.0 34.4 None 55.4 52.7 None 64.1 56.9 None PIPE10378 A1 ZPIP10990 2.25 0 1 CIRCULAR 0.005 RCP 14.1 14.1 None 0.67 23.6 23.1 None 35.6 36.2 Both Upstream and Downstream 40.6 36.6 Both Upstream and Downstream PIPE10539 A1 ZPIP15703 4 0 1 CIRCULAR 0.004 RCP 78.7 77.4 None 0.85 132.6 109.7 None 195.7 155.4 None 221.3 158.2 None PIPE10461 A1 ZPIP17261 2.5 0 1 CIRCULAR 0.007 ABS 20.6 20.6 None 0.59 34.2 33.9 None 51.6 51.7 None 58.8 60.1 None PIPE10498 A1 ZPIP15210 6 0 1 CIRCULAR 0.006 RCP 276.1 288.2 None 0.91 406.6 508.1 None 535.1 532.6 None 586.7 541.4 Both Upstream and Downstream PIPE10001 A1 ZPIP10236 1.5 0 1 CIRCULAR 0.063 RCP 36.5 33.9 None 1.29 68.6 38.9 None 105.9 42.9 Upstream 122.3 44.7 Upstream PIPE10168 A1 ZPIP13673 2.25 0 1 CIRCULAR 0.005 RCP 9.9 9.9 None 0.44 19.5 20.2 None 30.3 34.9 None 34.8 38.0 None PIPE10247 A1 ZPIP17029 1.5 0 1 CIRCULAR 0.005 RCP 0.6 0.2 None 0.03 0.3 11.2 None 0.9 16.3 Upstream 0.9 12.7 Both Upstream and Downstream PIPE10353 A1 ZPIP14130 2 0 1 CIRCULAR 0.004 RCP 11.5 12.5 None 0.86 19.9 24.7 None 29.4 26.2 Both Upstream and Downstream 33.6 24.6 Both Upstream and Downstream PIPE10617 A1 ZPIP13447 2.5 0 2 CIRCULAR 0.009 RCP 45.5 45.9 None 0.58 77.5 77.9 None 118.2 118.9 None 133.9 133.2 None PIPE10021 A1 ZPIP10487 4 0 1 CIRCULAR 0.005 CIPCP 46.6 47.2 None 0.55 85.2 85.3 None 131.1 126.7 None 150.6 145.4 None PIPE10653 A1 ZPIP16897 2.5 0 1 CIRCULAR 0.005 RCP 15.8 15.8 None 0.55 28.2 28.3 None 42.1 42.1 None 48.2 48.2 None PIPE10161 A1 ZPIP17014 4 0 1 CIRCULAR 0.005 CIPCP 46.7 47.3 None 0.55 85.3 85.4 None 131.2 125.1 None 150.7 144.4 None PIPE10156 A1 ZPIP17008 2 0 1 CIRCULAR 0.005 ABS 7.8 7.8 None 0.49 13.0 13.0 None 19.7 23.6 None 22.5 26.4 None PIPE10372 A1 ZPIP14191 2 0 1 CIRCULAR 0.005 RCP 8.5 8.5 None 0.54 14.1 16.0 None 21.7 24.6 Both Upstream and Downstream 24.8 26.3 Both Upstream and Downstream PIPE10503 A1 ZPIP11663 3 0 1 CIRCULAR 0.016 RCP 34.0 33.9 None 0.4 75.9 75.7 None 119.9 125.4 None 135.8 139.4 Upstream PIPE10147 A1 ZPIP13640 1.5 0 1 CIRCULAR 0.019 RCP 17.2 15.7 None 1.08 26.6 19.3 None 38.0 22.6 Upstream 43.3 24.2 Upstream PIPE10337 A1 ZPIP17098 1.5 0 1 CIRCULAR 0.031 RCP 6.3 6.3 None 0.34 10.4 10.3 None 15.4 23.2 None 17.3 30.6 Upstream PIPE10553 A1 ZPIP18028 4 0 1 CIRCULAR 0.010 RCP 55.7 55.4 None 0.39 118.1 118.0 None 194.0 200.7 None 227.6 236.0 None PIPE10418 A1 ZPIP11224 2.25 0 1 CIRCULAR 0.005 RCP 11.7 12.0 None 0.54 20.1 20.5 None 30.7 31.4 None 35.0 36.3 None PIPE10220 A1 ZPIP13739 1.5 0 1 CIRCULAR 0.014 RCP 12.0 11.9 None 0.94 21.2 17.2 Upstream 31.5 19.6 Both Upstream and Downstream 36.0 20.6 Both Upstream and Downstream PIPE10527 A1 ZPIP11735 6 0 1 CIRCULAR 0.006 RCP 262.1 277.5 None 0.86 387.3 414.1 None 511.0 471.3 None 561.3 523.6 Downstream PIPE10401 A1 ZPIP14416 3 0 1 CIRCULAR 0.008 RCP 35.4 35.4 None 0.61 62.8 62.1 None 97.6 89.7 None 108.4 94.3 None PIPE10658 A1 ZPIP13692 2.25 0 1 CIRCULAR 0.004 RCP 9.4 9.8 None 0.51 17.5 18.5 None 27.2 28.4 None 31.6 31.2 None PIPE10154 A1 ZPIP13647 2.5 0 1 CIRCULAR 0.008 RCP 15.9 16.0 None 0.45 31.1 30.9 None 49.2 50.2 None 56.6 57.4 None PIPE10234 A1 ZPIP13770 2 0 1 CIRCULAR 0.010 RCP 13.6 13.6 None 0.6 21.5 21.2 None 31.8 32.1 None 35.9 35.9 None PIPE10238 A1 ZPIP10773 5.5 0 1 CIRCULAR 0.007 RCP 241.9 234.9 None 0.86 382.9 385.6 None 529.9 443.5 Downstream 583.8 436.2 Both Upstream and Downstream PIPE10243 A1 ZPIP10777 6 0 1 CIRCULAR 0.006 RCP 272.8 287.0 None 0.88 401.3 467.0 None 528.3 525.1 None 579.5 518.2 Both Upstream and Downstream PIPE10439 A1 ZPIP11311 1.5 0 1 CIRCULAR 0.011 RCP 6.5 6.5 None 0.6 11.8 10.5 Upstream 18.4 15.2 Both Upstream and Downstream 21.2 17.2 Both Upstream and Downstream PIPE10379 A1 ZPIP10991 2.5 0 1 CIRCULAR 0.005 RCP 16.6 16.8 None 0.57 27.7 27.5 None 41.9 42.9 Both Upstream and Downstream 47.3 46.6 Both Upstream and Downstream PIPE10478 A1 ZPIP14932 2 0 1 CIRCULAR 0.016 RCP 16.8 16.9 None 0.58 28.9 28.9 None 44.1 43.5 None 50.3 45.7 Both Upstream and Downstream PIPE10105 A1 ZPIP16978 4 0 1 CIRCULAR 0.004 RCP 35.0 51.4 None 0.57 61.5 72.2 None 94.5 140.8 None 107.6 142.6 Both Upstream and Downstream PIPE10231 A1 ZPIP13747 1.5 0 1 CIRCULAR 0.005 RCP 3.9 3.9 None 0.54 6.6 6.4 None 9.8 10.4 None 11.1 11.5 None PIPE10437 A1 ZPIP14807 1.5 0 1 CIRCULAR 0.008 RCP 6.3 6.1 None 0.63 11.1 12.2 None 16.6 13.4 None 18.5 15.0 None PIPE10438 A1 ZPIP14808 1.5 0 1 CIRCULAR 0.008 RCP 6.4 6.1 None 0.63 11.4 11.1 None 16.7 12.9 None 19.0 15.0 None PIPE10441 A1 ZPIP11313 1.5 0 1 CIRCULAR 0.008 RCP 6.5 6.2 None 0.67 11.7 11.0 None 17.7 12.5 Both Upstream and Downstream 20.1 14.4 Both Upstream and Downstream PIPE10302 A1 ZPIP13919 2 0 1 CIRCULAR 0.023 RCP 15.3 15.3 None 0.45 32.9 32.7 None 52.2 48.6 None 60.4 52.6 Upstream PIPE10346 A1 ZPIP14127 3 0 1 CIRCULAR 0.004 RCP 28.4 28.4 None 0.66 49.9 48.2 None 75.6 62.9 None 86.0 65.8 Upstream PIPE10477 A1 ZPIP14931 2 0 1 CIRCULAR 0.017 RCP 18.4 18.5 None 0.62 31.6 31.4 None 48.1 45.5 None 54.9 45.0 Both Upstream and Downstream PIPE10550 A1 ZPIP11822 2 0 1 CIRCULAR 0.009 RCP 9.3 9.3 None 0.44 18.1 18.0 None 29.3 27.7 None 33.9 31.6 None PIPE10666 A1 ZPIP14821 3.5 0 1 CIRCULAR 0.005 ABS 36.8 36.7 None 0.54 61.2 60.5 None 91.9 92.6 None 104.6 102.6 None PIPE10674 A1 ZPIP13731 3 0 1 CIRCULAR 0.010 CIPCP 29.6 29.6 None 0.52 48.6 48.8 None 72.8 73.9 None 82.8 84.5 None PIPE10296 A1 ZPIP10848 2.5 0 1 CIRCULAR 0.010 RCP 19.3 19.3 None 0.47 40.0 39.1 None 63.9 56.7 None 73.0 60.9 None PIPE10676 A1 ZPIP14325 4.5 0 1 CIRCULAR 0.009 RCP 102.3 102.5 None 0.56 204.7 197.6 None 299.1 259.0 Both Upstream and Downstream 328.6 272.2 Both Upstream and Downstream PIPE10006 A1 ZPIP10239 1.5 0 1 CIRCULAR 0.008 CIPCP 3.8 3.8 None 0.46 6.4 6.4 None 9.5 10.2 None 11.0 12.2 None PIPE10608 A1 PIP19086 4.5 0 1 CIRCULAR 0.004 RCP 100.7 57.3 None 0.45 144.4 108.4 None 212.1 163.2 None 237.1 185.9 None CULV10008 A1 ZCUL15619 4 7 1 RECT_CLOSED 0.007 RCP 200.6 212.4 None 0.7 330.0 362.7 None 474.7 422.0 Both Upstream and Downstream 566.7 435.1 Both Upstream and Downstream CULV10009 A1 ZPIP14195 4 7 1 RECT_CLOSED 0.005 RCP 203.0 213.0 None 0.79 334.8 365.8 None 481.9 388.3 Both Upstream and Downstream 573.8 390.4 Both Upstream and Downstream PIPE10593 A1 ZPIP17881 2 0 1 CIRCULAR 0.014 RCP 12.6 12.6 None 0.47 24.2 24.1 None 37.6 34.2 None 43.2 38.5 None PIPE10066 A1 ZPIP13517 2 0 1 CIRCULAR 0.005 RCP 6.7 6.7 None 0.42 11.9 12.1 None 18.4 17.8 None 21.1 22.7 None CULV10014 A1 ZCUL13128 4 7 1 RECT_CLOSED 0.007 RCP 201.7 211.5 None 0.69 332.5 363.1 None 478.6 460.9 Both Upstream and Downstream 570.3 438.0 Both Upstream and Downstream PIPE10517 A1 ZPIP11696 1.75 0 1 CIRCULAR 0.003 RCP 5.0 5.0 None 0.53 8.0 8.0 None 11.8 11.8 None 13.4 13.4 None PIPE10544 A1 ZPIP15765 2.5 0 1 CIRCULAR 0.002 HDPE 8.6 9.1 None 0.45 18.0 17.4 None 29.4 26.5 None 34.1 28.9 None PIPE10015 A1 ZPIP10295 2.25 0 1 CIRCULAR 0.047 RCP 36.9 28.6 None 0.43 68.8 58.3 None 110.6 88.6 None 129.3 95.6 None PIPE10142 A1 ZPIP16997 1.5 0 1 CIRCULAR 0.039 RCP 13.0 12.9 None 0.62 20.5 20.0 None 30.0 27.9 None 33.8 29.4 None PIPE10345 A1 ZPIP14126 1.5 0 1 CIRCULAR 0.031 RCP 9.6 9.6 None 0.52 15.5 15.5 None 22.9 23.3 None 25.9 25.9 None PIPE10111 A1 ZPIP13564 3.5 0 1 CIRCULAR 0.025 RCP 70.2 70.2 None 0.44 145.3 145.0 None 227.3 219.6 None 260.3 221.0 Upstream PIPE10057 A1 ZPIP13506 1.5 0 1 CIRCULAR 0.027 RCP 7.3 7.3 None 0.43 13.1 13.1 None 20.1 21.7 None 23.0 23.5 None PIPE10065 A1 ZPIP13516 2.5 0 1 CIRCULAR 0.005 RCP 12.7 12.7 None 0.44 21.8 22.0 None 33.4 32.3 None 38.2 38.6 None PIPE10176 A1 ZPIP10727 3.5 0 1 CIRCULAR 0.004 CIPCP 20.7 20.8 None 0.4 39.8 39.9 None 61.8 61.3 None 70.9 69.8 None PIPE10212 A1 ZPIP13729 3 0 1 CIRCULAR 0.016 CIPCP 35.0 35.1 None 0.48 57.3 57.6 None 85.8 86.1 None 97.6 98.5 None PIPE10289 A1 ZPIP13891 2 0 1 CIRCULAR 0.007 RCP 8.3 8.6 None 0.47 13.6 14.0 None 20.3 22.3 None 23.1 24.6 None PIPE10456 A1 ZPIP16682 2.5 0 1 CIRCULAR 0.009 ABS 17.2 17.2 None 0.45 28.7 28.5 None 43.2 43.6 None 49.4 51.2 None PIPE10584 A1 ZPIP17664 1.5 0 1 CIRCULAR 0.019 RCP 7.1 7.1 None 0.48 11.5 11.5 None 17.4 17.7 None 19.6 19.7 None PIPE10393 A1 ZPIP11057 4 0 1 CIRCULAR 0.015 RCP 78.0 77.8 None 0.45 158.1 157.8 None 246.7 227.9 Both Upstream and Downstream 278.8 231.4 Both Upstream and Downstream PIPE10545 A1 ZPIP15766 2.5 0 1 CIRCULAR 0.004 RCP 9.2 9.3 None 0.36 18.2 17.8 None 29.5 29.2 None 34.2 34.8 None PIPE10559 A1 ZPIP15903 4 0 1 CIRCULAR 0.015 RCP 55.1 55.1 None 0.31 117.5 117.4 None 192.9 194.3 None 226.4 237.9 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 3 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE10122 A1 ZPIP10680 1.5 0 1 CIRCULAR 0.010 PVC 4.1 4.1 None 0.39 7.2 7.2 None 11.0 12.2 None 12.6 13.8 None PIPE10232 A1 ZPIP10760 1.5 0 1 CIRCULAR 0.008 CIPCP 4.1 4.1 None 0.5 6.6 6.6 None 9.6 9.9 None 10.8 10.9 None PIPE10239 A1 ZPIP13778 6 0 1 CIRCULAR 0.009 RCP 253.7 271.2 None 0.66 386.2 417.4 None 510.4 499.0 None 560.7 539.2 Upstream PIPE10464 A1 ZPIP14870 4 0 1 CIRCULAR 0.004 RCP 35.9 52.0 None 0.57 63.1 75.0 None 96.5 117.2 None 109.6 119.0 Upstream PIPE10595 A1 ZPIP12276 3 0 1 CIRCULAR 0.007 RCP 24.2 24.3 None 0.45 43.2 42.9 None 62.7 62.4 None 66.5 71.1 None CULV10033 A1 ZCUL079B 3 8 1 RECT_CLOSED 0.003 RCP 80.9 82.4 None 0.53 151.7 135.0 None 219.4 209.7 None 246.7 199.3 None PIPE10077 A1 ZPIP10642 1.5 0 1 CIRCULAR 0.005 CIPCP 0.2 0.1 None 0.02 0.3 0.1 None 0.4 5.2 None 0.4 8.0 None PIPE10497 A1 ZPIP15209 6.5 0 1 CIRCULAR 0.007 RCP 306.8 314.7 None 0.72 426.5 465.8 None 559.8 498.7 None 616.0 556.3 Upstream PIPE10616 A1 ZPIP10294 2.5 0 1 CIRCULAR 0.028 RCP 40.4 31.4 None 0.46 75.4 63.7 None 121.1 83.2 None 141.5 87.2 Downstream PIPE10619 A1 ZPIP13600 3 0 2 CIRCULAR 0.004 RCP 53.6 50.7 None 0.6 105.3 76.2 None 156.2 102.2 None 178.0 107.7 None PIPE10152 A1 ZPIP10707 7 0 1 CIRCULAR 0.006 RCP 325.4 355.7 None 0.73 485.2 524.5 None 645.6 575.9 None 712.2 610.5 None PIPE10173 A1 ZPIP10724 3.5 0 1 CIRCULAR 0.005 CIPCP 24.4 24.6 None 0.4 46.0 46.3 None 71.1 70.1 None 81.5 77.0 None PIPE10335 A1 ZPIP14117 6.5 0 1 CIRCULAR 0.007 RCP 296.4 320.3 None 0.73 434.5 467.6 None 566.1 503.9 None 623.2 554.6 None PIPE10336 A1 ZPIP17097 6.5 0 1 CIRCULAR 0.007 RCP 309.8 326.7 None 0.74 431.0 469.3 None 564.7 502.6 None 621.6 555.2 None PIPE10496 A1 ZPIP15208 6.5 0 1 CIRCULAR 0.007 RCP 293.3 318.5 None 0.72 434.3 489.5 None 566.5 509.2 None 623.6 557.3 None PIPE10096 A1 ZPIP13552 3.5 0 1 CIRCULAR 0.032 RCP 68.8 68.7 None 0.38 142.6 142.4 None 222.8 229.8 None 255.2 226.7 Both Upstream and Downstream PIPE10339 A1 ZPIP10953 1.5 0 1 CIRCULAR 0.056 RCP 0.0 0.0 None 0 0.0 0.2 None 0.0 20.6 Upstream 0.0 31.0 Both Upstream and Downstream PIPE10402 A1 ZPIP14417 5 0 1 CIRCULAR 0.007 RCP 112.9 93.8 None 0.43 203.4 171.9 None 309.8 249.1 None 340.9 270.6 None PIPE10493 A1 ZPIP11529 7 0 1 CIRCULAR 0.006 RCP 322.4 352.1 None 0.74 480.5 519.4 None 637.7 564.1 None 701.9 597.6 None CULV10034 A1 ZCUL10339 2 7 1 RECT_CLOSED 0.010 RCP 60.0 61.5 None 0.45 104.8 121.0 None 158.5 155.1 Upstream 175.3 170.6 Upstream PIPE10117 A1 ZPIP16989 1.5 0 1 CIRCULAR 0.011 RCP 4.2 4.2 None 0.38 7.3 7.3 None 11.2 11.0 None 12.8 13.5 None PIPE10118 A1 ZPIP13592 3 0 1 CIRCULAR 0.002 RCP 11.3 10.8 None 0.33 16.4 20.9 None 24.6 37.4 Both Upstream and Downstream 27.7 40.8 Both Upstream and Downstream PIPE10160 A1 ZPIP13661 4.5 0 1 CIRCULAR 0.007 CIPCP 61.1 61.9 None 0.43 109.2 109.1 None 168.0 157.1 None 192.6 177.5 None PIPE10165 A1 ZPIP10718 3.5 0 1 CIRCULAR 0.006 CIPCP 26.6 27.0 None 0.41 49.6 49.9 None 76.4 75.0 None 87.4 82.1 None PIPE10236 A1 ZPIP17028 5.5 0 1 CIRCULAR 0.011 RCP 241.9 246.1 None 0.71 366.5 388.7 Downstream 485.5 416.6 Both Upstream and Downstream 533.6 430.5 Both Upstream and Downstream PIPE10240 A1 ZPIP13779 5.5 0 1 CIRCULAR 0.010 RCP 262.1 249.7 None 0.73 380.8 386.4 None 489.7 408.1 Both Upstream and Downstream 536.4 424.0 Both Upstream and Downstream PIPE10529 A1 ZPIP15615 1.5 0 1 CIRCULAR 0.032 RCP 7.2 7.2 None 0.38 12.5 12.5 None 19.0 19.9 None 21.6 23.3 None PIPE10663 A1 ZPIP10691 1.5 0 1 CIRCULAR 0.010 RCP 3.9 3.9 None 0.37 6.2 6.4 None 9.3 9.3 None 10.5 13.2 Downstream PIPE10266 A1 ZPIP13864 2 0 1 CIRCULAR 0.008 RCP 9.3 9.4 None 0.46 16.0 16.0 None 23.9 23.3 None 27.2 25.1 None PIPE10332 A1 ZPIP10950 7 0 1 CIRCULAR 0.006 RCP 320.6 347.2 None 0.72 477.5 516.3 None 633.1 555.7 None 694.6 588.1 None PIPE10457 A1 ZPIP16683 1.5 0 1 CIRCULAR 0.009 ABS 3.5 3.5 None 0.35 5.7 5.6 None 8.4 8.5 None 9.6 12.5 None PIPE10494 A1 ZPIP11530 7 0 1 CIRCULAR 0.006 RCP 321.2 349.2 None 0.73 478.5 516.8 None 633.8 555.9 None 695.6 589.2 None PIPE10007 A1 ZPIP10240 4 0 1 CIRCULAR 0.013 CIPCP 59.2 60.0 None 0.42 100.3 100.9 None 148.7 144.8 None 169.6 176.8 None PIPE10248 A1 ZPIP17030 5.5 0 1 CIRCULAR 0.011 RCP 243.1 235.6 None 0.68 386.1 392.6 None 536.1 431.9 None 583.2 420.6 Both Upstream and Downstream PIPE10609 A1 PIP19087 2 0 1 CIRCULAR 0.030 RCP 20.2 20.2 None 0.52 34.4 34.1 None 52.3 46.2 None 59.6 47.9 Upstream PIPE10159 A1 ZPIP10712 2.5 0 1 CIRCULAR 0.005 CIPCP 9.3 9.3 None 0.37 15.5 15.1 None 23.8 21.2 None 27.3 30.1 None PIPE10562 A1 ZPIP11906 2 0 1 CIRCULAR 0.008 RCP 3.8 3.7 None 0.18 6.0 6.4 None 9.1 26.7 Both Upstream and Downstream 9.5 24.9 Both Upstream and Downstream PIPE10576 A1 ZPIP11993 1.5 0 1 CIRCULAR 0.025 RCP 7.0 7.0 None 0.42 11.4 11.3 None 17.3 16.9 None 19.5 20.1 None PIPE10607 A1 PIP19085 4.5 0 1 CIRCULAR 0.006 RCP 100.0 54.1 None 0.36 143.4 102.9 None 204.2 155.2 None 228.8 181.0 None PIPE10019 A1 ZPIP12862 4.5 0 1 CIRCULAR 0.006 RCP 82.0 77.0 None 0.51 152.6 140.6 None 239.0 185.5 Upstream 276.7 180.4 Both Upstream and Downstream PIPE10174 A1 ZPIP10725 3.5 0 1 CIRCULAR 0.006 CIPCP 24.4 24.6 None 0.38 45.9 46.2 None 70.9 70.2 None 81.3 77.9 None PIPE10215 A1 ZPIP13733 1.75 0 1 CIRCULAR 0.076 RCP 17.3 17.3 None 0.4 28.6 28.6 None 42.9 42.7 None 48.8 52.0 None PIPE10390 A1 ZPIP14327 1.5 0 1 CIRCULAR 0.062 RCP 6.9 6.9 None 0.26 13.3 13.3 None 20.7 29.4 Both Upstream and Downstream 23.8 31.3 Both Upstream and Downstream PIPE10131 A1 ZPIP13617 2 0 1 CIRCULAR 0.021 RCP 11.0 11.1 None 0.34 19.0 18.6 None 28.9 34.5 None 33.0 38.2 None PIPE10270 A1 ZPIP17048 1.5 0 1 CIRCULAR 0.011 RCP 4.3 4.3 None 0.39 7.3 7.3 None 11.0 11.0 None 12.5 13.0 None PIPE10574 A1 ZPIP17649 1.5 0 1 CIRCULAR 0.004 RCP 3.2 3.2 None 0.47 4.3 5.6 None 5.6 8.9 None 5.5 7.9 None PIPE10580 A1 ZPIP16123 4 0 1 CIRCULAR 0.013 RCP 66.8 67.4 None 0.41 112.4 112.6 None 166.4 162.5 None 190.1 192.1 None PIPE10581 A1 ZPIP16124 4 0 1 CIRCULAR 0.013 RCP 66.9 67.5 None 0.41 112.6 112.8 None 166.7 162.5 None 190.4 192.2 None PIPE10582 A1 ZPIP16125 4 0 1 CIRCULAR 0.013 RCP 66.9 67.5 None 0.41 112.7 113.0 None 166.8 162.7 None 190.5 192.2 None PIPE10039 A1 ZPIP13445 3 0 1 CIRCULAR 0.011 RCP 27.0 26.9 None 0.38 47.9 47.8 None 72.9 72.1 None 84.1 82.7 None PIPE10166 A1 ZPIP10719 6 0 1 CIRCULAR 0.009 RCP 244.6 252.9 None 0.61 372.8 527.1 Upstream 493.9 485.8 Upstream 543.3 479.6 Both Upstream and Downstream PIPE10260 A1 ZPIP10801 3 0 1 CIRCULAR 0.019 RCP 34.4 34.6 None 0.38 62.9 62.6 None 97.0 95.4 None 111.3 106.0 None PIPE10448 A1 ZPIP16680 1.5 0 1 CIRCULAR 0.003 ABS 2.5 2.5 None 0.42 4.1 4.1 None 6.1 6.1 None 6.9 7.0 None PIPE10064 A1 ZPIP10636 2.5 0 1 CIRCULAR 0.007 RCP 13.9 14.0 None 0.4 24.1 24.2 None 36.7 35.5 None 42.1 40.0 None PIPE10235 A1 ZPIP17026 2 0 1 CIRCULAR 0.017 RCP 13.5 13.5 None 0.46 21.5 21.2 None 31.9 30.6 None 36.0 33.7 None PIPE10352 A1 ZPIP14129 1.5 0 1 CIRCULAR 0.004 RCP 0.1 0.1 None 0.01 0.1 0.5 None 0.2 7.1 Both Upstream and Downstream 0.2 7.5 Both Upstream and Downstream PIPE10411 A1 ZPIP11216 2 0 1 CIRCULAR 0.016 PVC 9.7 9.7 None 0.33 18.9 18.9 None 30.5 31.0 None 35.4 33.0 None PIPE10538 A1 ZPIP15702 1.5 0 1 CIRCULAR 0.029 RCP 4.9 4.9 None 0.27 8.3 8.2 None 12.2 21.5 None 14.1 20.4 None PIPE10051 A1 ZPIP16662 1.75 0 1 CIRCULAR 0.218 RCP 27.8 27.7 None 0.37 49.2 49.1 None 75.0 74.5 None 86.4 83.3 Upstream PIPE10366 A1 ZPIP14184 4 0 1 CIRCULAR 0.015 CIPCP 61.2 61.2 None 0.41 102.3 100.6 None 154.0 149.7 None 174.6 170.0 None PIPE10530 A1 ZPIP15616 1.5 0 1 CIRCULAR 0.034 RCP 7.3 7.3 None 0.37 12.6 12.6 None 19.0 19.9 None 21.6 22.0 None PIPE10667 A1 ZPIP15526 5.5 0 1 CIRCULAR 0.009 RCP 134.9 127.6 None 0.4 258.4 227.6 None 387.3 329.6 None 430.4 361.9 None CULV10004 A1 ZCUL15521 4 7 1 RECT_CLOSED 0.016 RCP 241.4 247.5 None 0.52 368.1 533.9 Downstream 487.0 522.5 Both Upstream and Downstream 535.8 536.4 Both Upstream and Downstream PIPE10610 A1 PIP19088 2 0 1 CIRCULAR 0.038 RCP 21.9 22.0 None 0.5 37.1 36.7 None 56.4 48.5 None 64.0 49.4 None CHAN10013 A1 CH066 5 3 1 TRAPEZOIDAL 0.004 Earthen 95.3 98.8 None 0.44 184.2 183.6 None 225.9 228.5 Upstream 245.8 253.2 Upstream PIPE10203 A1 ZPIP10748 1.5 0 1 CIRCULAR 0.028 RCP 6.2 6.4 None 0.37 10.6 10.5 None 17.0 16.7 None 21.2 19.4 None PIPE10331 A1 ZPIP10949 6.5 0 1 CIRCULAR 0.008 RCP 293.9 326.6 None 0.68 438.7 470.7 None 567.3 486.7 None 626.4 527.6 None PIPE10520 A1 ZPIP11701 5.5 0 1 CIRCULAR 0.009 RCP 135.3 128.0 None 0.4 258.9 228.2 None 388.2 330.3 None 430.9 353.7 None PIPE10557 A1 ZPIP11883 2.25 0 1 CIRCULAR 0.070 RCP 2.5 19.1 None 0.23 4.1 35.3 None 6.0 90.1 Both Upstream and Downstream 6.7 91.3 Both Upstream and Downstream PIPE10567 A1 ZPIP15946 5 0 1 CIRCULAR 0.021 RCP 236.9 233.1 None 0.62 385.3 386.1 None 542.3 423.1 None 590.9 418.8 Both Upstream and Downstream PIPE10249 A1 ZPIP10780 5 0 1 CIRCULAR 0.018 RCP 204.3 206.7 None 0.6 337.1 358.9 None 484.0 389.3 Both Upstream and Downstream 543.5 380.7 Both Upstream and Downstream PIPE10116 A1 ZPIP13580 2 0 1 CIRCULAR 0.018 RCP 10.4 10.5 None 0.34 19.1 19.1 None 29.9 33.1 None 34.5 33.3 Upstream PIPE10389 A1 ZPIP14326 4 0 1 CIRCULAR 0.024 RCP 84.0 83.8 None 0.38 169.9 170.5 None 264.9 234.4 Both Upstream and Downstream 299.3 243.3 Both Upstream and Downstream PIPE10507 A1 ZPIP11693 2.25 0 1 CIRCULAR 0.043 RCP 26.2 26.2 None 0.41 43.8 43.7 None 65.6 65.7 None 74.4 69.9 None PIPE10067 A1 ZPIP13518 1.5 0 1 CIRCULAR 0.019 RCP 5.0 5.0 None 0.34 9.0 9.0 None 13.9 13.9 None 15.9 15.7 None CULV10005 A1 ZCUL10732 4 7 1 RECT_CLOSED 0.013 RCP 240.2 246.1 None 0.57 366.0 448.4 Upstream 483.9 438.9 Both Upstream and Downstream 532.3 457.7 Both Upstream and Downstream

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 4 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE10403 A1 ZPIP14418 5.5 0 1 CIRCULAR 0.009 RCP 131.6 124.7 None 0.38 253.2 223.2 None 380.7 324.4 None 422.6 346.2 None PIPE10452 A1 ZPIP17257 2.5 0 1 CIRCULAR 0.007 ABS 11.8 11.8 None 0.36 19.5 19.3 None 29.0 29.2 None 33.0 35.3 None PIPE10561 A1 ZPIP11905 2 0 1 CIRCULAR 0.005 RCP 0.0 0.0 None 0 0.0 4.6 None 0.0 17.1 Both Upstream and Downstream 0.7 17.0 Both Upstream and Downstream PIPE10011 A1 ZPIP12764 3 0 1 CIRCULAR 0.006 RCP 17.8 17.6 None 0.34 31.6 31.6 None 47.7 47.5 None 54.8 54.7 None PIPE10480 A1 ZPIP14934 2 0 1 CIRCULAR 0.036 RCP 20.1 20.2 None 0.47 34.3 34.0 None 52.1 45.4 None 59.5 45.8 Both Upstream and Downstream PIPE10487 A1 ZPIP15147 2 0 1 CIRCULAR 0.021 RCP 9.5 9.6 None 0.29 17.4 17.2 None 26.9 28.4 None 30.9 34.4 None PIPE10566 A1 ZPIP15945 5 0 1 CIRCULAR 0.021 RCP 226.1 225.6 None 0.6 368.7 365.0 None 526.0 405.5 Upstream 572.2 400.6 Both Upstream and Downstream PIPE10076 A1 ZPIP10641 3 0 1 CIRCULAR 0.018 RCP 28.3 28.3 None 0.32 45.5 45.5 None 67.6 82.5 None 76.6 92.8 None PIPE10041 A1 ZPIP10614 3 0 1 CIRCULAR 0.023 RCP 33.3 33.3 None 0.33 61.0 61.0 None 91.2 91.1 None 105.2 104.9 None PIPE10048 A1 ZPIP13482 3 0 1 CIRCULAR 0.010 RCP 23.1 23.0 None 0.34 40.6 40.5 None 61.8 60.7 None 71.0 69.2 None PIPE10092 A1 ZPIP16971 3 0 1 CIRCULAR 0.038 RCP 35.6 35.5 None 0.27 78.9 78.5 None 124.5 127.8 None 141.7 136.3 None PIPE10410 A1 ZPIP14556 2.5 0 1 CIRCULAR 0.011 RCP 17.0 17.0 None 0.4 27.1 27.1 None 39.8 39.6 None 45.0 44.2 None PIPE10453 A1 ZPIP17258 3 0 1 CIRCULAR 0.016 ABS 32.2 32.2 None 0.38 53.5 52.9 None 80.6 79.7 None 91.7 88.3 None PIPE10599 A1 ZPIP17882 3 0 1 CIRCULAR 0.010 RCP 24.5 25.4 None 0.38 47.7 44.9 None 54.7 79.1 Upstream 59.2 69.4 Upstream PIPE10657 A1 ZPIP10755 1.5 0 1 CIRCULAR 0.087 RCP 11.7 11.7 None 0.38 18.8 18.8 None 27.8 27.8 None 31.5 32.3 None PIPE10358 A1 ZPIP10978 4 0 1 CIRCULAR 0.023 CIPCP 73.9 74.1 None 0.4 124.5 123.7 None 180.3 187.3 Downstream 191.8 192.8 Downstream PIPE10462 A1 ZPIP14868 4 0 1 CIRCULAR 0.004 RCP 25.9 42.5 None 0.47 45.5 60.1 None 69.9 97.3 None 80.5 93.0 Both Upstream and Downstream PIPE10632 A1 ZPIP15951 1.5 0 1 CIRCULAR 0.011 RCP 4.8 4.7 None 0.43 7.7 7.0 None 14.6 7.3 Both Upstream and Downstream 28.1 11.4 Both Upstream and Downstream PIPE10084 A1 ZPIP13537 1.5 0 1 CIRCULAR 0.048 RCP 0.0 0.0 None 0 0.0 0.9 None 0.0 17.4 Both Upstream and Downstream 0.0 23.5 Both Upstream and Downstream PIPE10091 A1 ZPIP13547 3 0 1 CIRCULAR 0.039 RCP 34.1 33.9 None 0.26 76.1 75.7 None 120.3 121.7 None 136.2 134.2 None PIPE10115 A1 ZPIP13574 3.5 0 1 CIRCULAR 0.047 RCP 65.5 65.4 None 0.3 137.5 137.4 None 215.2 216.8 None 246.1 222.9 None PIPE10237 A1 ZPIP10772 5.5 0 1 CIRCULAR 0.021 RCP 245.0 242.8 None 0.5 385.0 392.2 None 490.9 477.5 Both Upstream and Downstream 525.9 496.7 Both Upstream and Downstream PIPE10030 A1 ZPIP13438 4 0 1 CIRCULAR 0.008 RCP 45.8 45.9 None 0.35 77.6 78.0 None 119.1 118.9 None 135.0 133.2 None PIPE10113 A1 ZPIP13570 3 0 1 CIRCULAR 0.003 RCP 10.1 10.2 None 0.31 18.9 20.7 None 29.9 33.8 Downstream 34.7 33.6 Downstream PIPE10226 A1 ZPIP13742 2 0 1 CIRCULAR 0.019 RCP 10.6 10.7 None 0.34 18.2 18.3 None 27.7 27.7 None 31.6 31.3 None PIPE10446 A1 ZPIP16678 1.5 0 1 CIRCULAR 0.017 ABS 5.3 5.3 None 0.39 8.5 8.5 None 12.6 12.5 None 14.2 13.9 None PIPE10079 A1 ZPIP13529 4 0 1 CIRCULAR 0.009 RCP 45.6 45.8 None 0.34 77.4 77.8 None 118.8 118.7 None 134.7 132.7 None PIPE10325 A1 ZPIP10896 1.5 0 1 CIRCULAR 0.043 RCP 6.1 6.1 None 0.28 11.7 11.7 None 18.6 18.4 None 21.4 21.9 None PIPE10365 A1 ZPIP14183 5 0 1 CIRCULAR 0.012 CIPCP 100.9 96.6 None 0.4 183.4 172.4 None 277.2 244.9 Downstream 321.7 243.6 Both Upstream and Downstream PIPE10502 A1 ZPIP11662 3 0 1 CIRCULAR 0.025 RCP 25.0 25.0 None 0.24 59.3 59.3 None 94.7 100.2 None 109.3 105.5 Both Upstream and Downstream PIPE10526 A1 ZPIP11734 6 0 1 CIRCULAR 0.015 RCP 256.0 272.1 None 0.52 386.4 414.4 None 510.9 492.6 None 560.8 526.9 None PIPE10531 A1 ZPIP15617 1.5 0 1 CIRCULAR 0.023 RCP 6.0 6.0 None 0.38 9.5 9.5 None 14.0 14.0 None 15.8 15.9 None PIPE10588 A1 ZPIP16593 1.5 0 1 CIRCULAR 0.032 RCP 6.3 6.3 None 0.34 10.3 10.4 None 15.4 20.2 None 17.5 18.9 Both Upstream and Downstream PIPE10589 A1 ZPIP12261 1.5 0 1 CIRCULAR 0.032 RCP 6.3 6.3 None 0.34 10.3 10.3 None 15.4 24.2 None 17.4 18.9 Both Upstream and Downstream PIPE10256 A1 ZPIP10793 1.5 0 1 CIRCULAR 0.019 RCP 5.2 5.2 None 0.36 8.6 8.6 None 12.7 12.7 None 14.5 14.4 None PIPE10281 A1 ZPIP10832 3.5 0 1 CIRCULAR 0.017 RCP 40.9 41.3 None 0.31 77.0 76.4 None 118.4 112.0 None 131.1 130.6 None PIPE10523 A1 ZPIP17498 4 0 1 CIRCULAR 0.004 RCP 24.2 40.7 None 0.45 42.2 59.3 None 65.0 95.9 Upstream 75.1 89.5 Both Upstream and Downstream PIPE10627 A1 ZPIP17004 2 0 1 CIRCULAR 0.029 RCP 13.6 13.6 None 0.35 21.6 21.5 None 31.9 33.2 None 35.9 38.3 None PIPE10675 A1 ZPIP13477 3 0 1 CIRCULAR 0.025 RCP 33.2 33.2 None 0.31 61.0 61.0 None 91.0 91.0 None 105.0 104.7 None PIPE10022 A1 ZPIP13359 1.5 0 1 CIRCULAR 0.091 RCP 10.7 10.7 None 0.34 18.3 18.2 None 27.7 27.6 None 31.5 31.3 None PIPE10085 A1 ZPIP13538 1.5 0 1 CIRCULAR 0.011 RCP 1.3 1.3 None 0.12 2.0 3.0 None 3.0 12.7 Both Upstream and Downstream 3.4 10.6 Both Upstream and Downstream PIPE10093 A1 ZPIP16972 3.5 0 1 CIRCULAR 0.050 RCP 65.6 65.6 None 0.29 137.4 137.6 None 215.1 217.0 None 245.9 219.7 Downstream PIPE10344 A1 ZPIP14125 1.5 0 1 CIRCULAR 0.063 RCP 9.6 9.6 None 0.37 15.5 15.5 None 22.9 22.9 None 25.9 25.9 None PIPE10381 A1 ZPIP17110 2.5 0 1 CIRCULAR 0.030 RCP 19.1 19.2 None 0.27 38.5 38.5 None 60.7 60.6 None 70.0 69.7 None PIPE10466 A1 ZPIP18027 3.5 0 1 CIRCULAR 0.010 RCP 27.0 27.0 None 0.27 54.6 54.7 None 84.0 84.3 None 96.9 96.7 None PIPE10548 A1 ZPIP15770 2.5 0 1 CIRCULAR 0.007 RCP 9.2 9.3 None 0.27 18.1 18.0 None 29.5 29.1 None 34.1 33.4 None PIPE10245 A1 ZPIP13780 2.5 0 1 CIRCULAR 0.008 RCP 9.2 9.4 None 0.25 9.7 17.9 None 41.3 32.0 Both Upstream and Downstream 84.1 36.7 Both Upstream and Downstream PIPE10465 A1 ZPIP18026 3.5 0 1 CIRCULAR 0.010 RCP 26.8 26.8 None 0.27 54.3 54.4 None 84.1 84.4 None 97.0 96.8 None PIPE10508 A1 ZPIP11694 1.75 0 1 CIRCULAR 0.043 RCP 11.6 11.5 None 0.35 19.5 19.4 None 29.2 29.3 None 33.3 31.9 None PIPE10564 A1 ZPIP11907 2.5 0 1 CIRCULAR 0.010 RCP 13.4 13.4 None 0.32 23.3 23.4 None 35.1 35.2 None 40.1 40.2 None PIPE10636 A1 ZPIP15948 1.25 0 1 CIRCULAR 0.012 RCP 0.0 0.4 None 0.05 0.5 3.5 Both Upstream and Downstream 0.7 7.5 Both Upstream and Downstream 1.4 6.8 Both Upstream and Downstream PIPE10178 A1 ZPIP13679 3.5 0 1 CIRCULAR 0.005 CIPCP 16.3 16.2 None 0.27 32.4 32.3 None 50.9 50.4 None 58.7 58.2 None PIPE10225 A1 ZPIP13741 2 0 1 CIRCULAR 0.016 RCP 9.0 9.0 None 0.32 15.6 15.7 None 24.0 23.9 None 27.4 27.2 None PIPE10521 A1 ZPIP17496 4 0 1 CIRCULAR 0.004 RCP 21.3 38.0 None 0.42 37.1 60.5 None 56.7 86.3 Downstream 64.9 87.2 Both Upstream and Downstream PIPE10597 A1 ZPIP16624 3 0 1 CIRCULAR 0.012 RCP 24.2 24.3 None 0.33 45.0 43.1 None 54.9 68.3 Downstream 57.3 71.1 Downstream CULV10003 A1 ZCUL081 3 7 1 RECT_CLOSED 0.020 RCP 102.7 102.7 None 0.3 185.7 185.0 Upstream 288.1 285.6 Upstream 335.2 331.7 Upstream PIPE10382 A1 ZPIP17116 6.5 0 1 CIRCULAR 0.011 RCP 304.0 315.7 None 0.56 426.3 465.7 None 559.7 502.5 None 616.0 534.9 Both Upstream and Downstream PIPE10563 A1 ZPIP15944 2.5 0 1 CIRCULAR 0.005 RCP 9.0 8.9 None 0.31 15.4 15.4 None 23.0 23.6 None 26.3 27.5 None PIPE10062 A1 ZPIP13512 1.5 0 1 CIRCULAR 0.074 RCP 9.0 9.0 None 0.32 15.8 15.8 None 24.2 23.5 None 27.7 26.9 None CULV10006 A1 ZCUL073A 4 4 1 RECT_CLOSED 0.009 RCP 50.5 50.9 None 0.29 121.0 101.3 None 151.5 169.8 None 159.7 163.2 None PIPE10383 A1 ZPIP17117 6.5 0 1 CIRCULAR 0.012 RCP 296.4 309.4 None 0.54 420.0 457.8 None 551.3 522.4 None 605.9 539.7 Both Upstream and Downstream PIPE10522 A1 ZPIP17497 4 0 1 CIRCULAR 0.004 RCP 21.4 37.9 None 0.42 37.2 57.0 None 57.7 82.4 Both Upstream and Downstream 66.9 85.4 Both Upstream and Downstream PIPE10321 A1 ZPIP10890 4 0 1 CIRCULAR 0.010 RCP 45.7 46.0 None 0.33 78.2 78.0 None 117.8 114.1 None 134.8 131.3 None PIPE10549 A1 ZPIP11821 2.5 0 1 CIRCULAR 0.007 RCP 9.3 9.4 None 0.27 18.2 18.1 None 29.5 27.4 None 34.2 32.0 None PIPE10533 A1 ZPIP11745 4 0 1 CIRCULAR 0.020 RCP 92.4 90.8 None 0.45 155.6 127.5 None 228.3 171.3 None 259.3 184.1 None PIPE10038 A1 ZPIP13444 1.5 0 1 CIRCULAR 0.054 RCP 7.3 7.3 None 0.3 13.0 13.1 None 20.1 19.7 None 23.0 22.2 None PIPE10385 A1 ZPIP11007 6.5 0 1 CIRCULAR 0.012 RCP 291.7 305.6 None 0.53 417.3 455.0 None 547.6 523.9 None 601.3 525.6 Both Upstream and Downstream PIPE10054 A1 ZPIP10630 3 0 1 CIRCULAR 0.013 RCP 23.1 23.0 None 0.3 40.6 40.5 None 61.8 60.7 None 71.0 69.4 None PIPE10075 A1 ZPIP10640 3 0 1 CIRCULAR 0.038 RCP 39.3 39.3 None 0.3 66.0 66.0 None 99.4 101.5 None 113.0 116.7 None PIPE10367 A1 ZPIP10984 4 0 1 CIRCULAR 0.033 CIPCP 67.4 67.7 None 0.3 113.2 112.0 None 171.7 203.8 None 193.7 203.4 None PIPE10406 A1 ZPIP11101 5 0 1 CIRCULAR 0.013 RCP 112.9 92.7 None 0.31 203.8 169.9 None 306.1 250.0 None 339.4 270.6 None PIPE10628 A1 ZPIP19008 2 0 1 CIRCULAR 0.029 RCP 12.6 12.6 None 0.33 19.9 19.9 None 29.3 29.3 None 33.1 34.6 None PIPE10224 A1 ZPIP10759 2.5 0 1 CIRCULAR 0.029 RCP 17.1 17.1 None 0.24 34.7 34.6 None 54.7 54.5 None 63.1 62.8 None PIPE10338 A1 ZPIP10952 6.5 0 1 CIRCULAR 0.012 RCP 289.0 303.1 None 0.53 414.3 451.2 None 544.6 478.0 None 597.5 514.1 Both Upstream and Downstream CULV10030 A1 CUL16860 4 4 1 RECT_CLOSED 0.012 RCP 59.8 60.2 None 0.3 142.9 118.6 None 180.5 168.8 Both Upstream and Downstream 190.4 179.6 Both Upstream and Downstream PIPE10094 A1 ZPIP10656 2 0 1 CIRCULAR 0.009 RCP 4.1 4.1 None 0.19 7.5 7.5 None 11.6 14.9 None 13.2 18.5 Downstream

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 5 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE10187 A1 ZPIP13695 2.25 0 1 CIRCULAR 0.019 RCP 12.4 12.4 None 0.29 22.1 22.1 None 33.8 34.0 None 38.6 37.7 None PIPE10209 A1 ZPIP10752 3 0 1 CIRCULAR 0.047 RCP 46.5 46.6 None 0.32 75.7 75.9 None 112.7 110.2 None 128.1 128.3 None PIPE10211 A1 ZPIP13728 3 0 1 CIRCULAR 0.030 RCP 37.5 37.6 None 0.32 61.3 61.6 None 91.6 88.6 None 104.1 101.9 None PIPE10074 A1 ZPIP16963 3 0 1 CIRCULAR 0.023 RCP 27.0 27.0 None 0.27 50.5 50.5 None 76.0 75.9 None 87.8 87.6 None PIPE10206 A1 ZPIP13722 3 0 1 CIRCULAR 0.066 RCP 53.6 53.7 None 0.31 87.5 87.7 None 130.8 128.3 None 148.7 149.9 None PIPE10467 A1 ZPIP14895 1.5 0 1 CIRCULAR 0.166 RCP 8.2 8.2 None 0.19 16.8 16.8 None 26.1 26.1 None 30.6 37.4 None PIPE10596 A1 ZPIP12277 3 0 1 CIRCULAR 0.009 RCP 19.7 19.8 None 0.31 35.6 35.4 None 54.1 49.5 None 61.9 55.3 None PIPE10644 A1 ZPIP10584 2 0 1 CIRCULAR 0.072 RCP 17.1 17.1 None 0.28 29.7 29.7 None 46.4 46.4 None 52.6 52.5 None PIPE10210 A1 ZPIP13727 3 0 1 CIRCULAR 0.047 RCP 45.2 45.3 None 0.31 73.6 74.0 None 109.9 107.8 None 124.9 125.6 None PIPE10223 A1 ZPIP10758 2.5 0 1 CIRCULAR 0.032 RCP 17.1 17.1 None 0.23 34.6 34.5 None 54.5 54.4 None 62.8 62.6 None PIPE10384 A1 ZPIP11006 6.5 0 1 CIRCULAR 0.014 RCP 294.4 308.1 None 0.49 419.8 458.2 None 551.2 515.8 None 605.8 533.6 Both Upstream and Downstream PIPE10542 A1 ZPIP11817 2 0 1 CIRCULAR 0.014 HDPE 3.7 3.7 None 0.14 11.8 10.6 None 24.0 18.6 None 29.3 22.6 None PIPE10033 A1 ZPIP16942 2.5 0 1 CIRCULAR 0.052 RCP 24.6 24.6 None 0.26 46.0 46.1 None 69.6 69.5 None 80.4 80.2 None PIPE10221 A1 ZPIP13740 2.25 0 1 CIRCULAR 0.021 RCP 12.3 12.4 None 0.28 22.1 22.1 None 33.6 34.0 None 38.5 37.7 None PIPE10307 A1 ZPIP13921 1.5 0 1 CIRCULAR 0.014 RCP 3.4 3.5 None 0.28 6.1 6.1 None 9.3 9.3 None 10.6 10.6 None PIPE10350 A1 ZPIP10958 2 0 1 CIRCULAR 0.031 RCP 14.8 14.9 None 0.38 25.9 29.2 None 39.1 31.7 Both Upstream and Downstream 44.8 33.2 Both Upstream and Downstream PIPE10354 A1 ZPIP10977 4.5 0 1 CIRCULAR 0.022 RCP 94.4 89.9 None 0.31 172.5 161.3 None 266.7 249.7 None 336.7 245.5 Both Upstream and Downstream CULV10007 A1 ZCUL14769 4 7 1 RECT_CLOSED 0.016 RCP 190.1 190.5 None 0.4 296.0 317.9 Upstream 434.1 398.4 Both Upstream and Downstream 498.3 404.5 Both Upstream and Downstream PIPE10163 A1 ZPIP10716 4 0 1 CIRCULAR 0.009 CIPCP 30.4 30.8 None 0.26 55.9 56.1 None 86.5 84.5 None 98.9 96.4 None PIPE10392 A1 ZPIP11056 4 0 1 CIRCULAR 0.009 RCP 13.5 14.6 None 0.11 23.4 36.7 None 32.9 106.6 Both Upstream and Downstream 37.0 111.7 Both Upstream and Downstream PIPE10504 A1 ZPIP15459 1.5 0 1 CIRCULAR 0.023 RCP 2.3 2.3 None 0.14 4.1 4.1 None 6.2 14.8 None 6.5 13.4 Both Upstream and Downstream PIPE10643 A1 ZPIP10583 2 0 1 CIRCULAR 0.021 RCP 9.0 9.0 None 0.28 15.4 15.4 None 23.9 23.9 None 27.2 27.1 None PIPE10134 A1 ZPIP16995 2.5 0 1 CIRCULAR 0.049 RCP 22.5 22.5 None 0.25 42.6 42.6 None 64.9 64.7 None 74.8 74.6 None PIPE10282 A1 ZPIP10833 2.5 0 1 CIRCULAR 0.051 RCP 23.2 23.2 None 0.25 43.3 43.0 None 67.7 67.7 None 77.9 76.7 None PIPE10322 A1 ZPIP17074 2.5 0 1 CIRCULAR 0.052 RCP 23.2 23.2 None 0.25 43.4 43.1 None 67.8 67.8 None 78.0 76.7 None PIPE10341 A1 ZPIP14122 1.5 0 1 CIRCULAR 0.020 RCP 0.0 0.0 None 0 0.0 1.8 None 0.0 5.9 None 0.0 12.3 Both Upstream and Downstream CULV10032 A1 ZCUL079C 3 8 1 RECT_CLOSED 0.007 RCP 79.6 81.0 None 0.34 151.1 131.5 None 215.3 205.5 None 242.4 193.2 None PIPE10029 A1 ZPIP16939 4 0 1 CIRCULAR 0.013 RCP 45.4 45.6 None 0.28 77.2 77.5 None 118.3 118.4 None 134.2 134.0 None PIPE10107 A1 ZPIP10661 1.5 0 1 CIRCULAR 0.082 RCP 1.6 1.6 None 0.05 2.8 2.8 None 4.2 16.2 None 4.7 24.4 None PIPE10183 A1 ZPIP10728 4 0 1 CIRCULAR 0.020 CIPCP 48.5 48.9 None 0.28 82.6 82.5 None 124.2 119.8 None 142.1 141.4 None PIPE10330 A1 ZPIP14011 1.5 0 1 CIRCULAR 0.006 RCP 0.0 0.0 None 0 0.0 0.1 None 0.1 2.6 None 0.1 6.4 None PIPE10361 A1 ZPIP14173 2.25 0 1 CIRCULAR 0.032 RCP 20.4 20.5 None 0.37 35.4 39.8 None 48.8 44.6 Both Upstream and Downstream 65.0 45.0 Both Upstream and Downstream PIPE10459 A1 ZPIP17259 2 0 1 CIRCULAR 0.010 ABS 6.7 6.6 None 0.3 10.7 10.7 None 16.0 15.8 None 18.1 17.9 None PIPE10556 A1 ZPIP17596 2.25 0 1 CIRCULAR 0.071 RCP 12.1 27.6 None 0.34 22.2 44.9 None 34.9 80.0 Upstream 40.5 66.9 Both Upstream and Downstream PIPE10615 A1 ZPIP10293 4.5 0 1 CIRCULAR 0.018 RCP 82.1 77.8 None 0.29 152.3 142.4 None 239.2 211.7 Downstream 274.4 214.7 Both Upstream and Downstream PIPE10069 A1 ZPIP10638 2 0 1 CIRCULAR 0.060 RCP 11.0 11.0 None 0.2 24.4 24.4 None 38.9 39.1 None 45.1 44.5 Downstream PIPE10078 A1 ZPIP13528 2 0 1 CIRCULAR 0.024 CIPCP 8.9 8.8 None 0.29 14.4 14.3 None 21.3 23.0 None 24.0 24.1 None PIPE10277 A1 ZPIP13882 3.5 0 1 CIRCULAR 0.025 RCP 41.3 41.6 None 0.26 77.5 76.6 None 118.8 117.3 None 137.0 126.7 None PIPE10355 A1 ZPIP14167 1.5 0 1 CIRCULAR 0.039 RCP 2.0 1.9 None 0.09 6.3 5.5 None 6.3 14.7 Both Upstream and Downstream 4.2 16.7 Both Upstream and Downstream PIPE10357 A1 ZPIP14172 5.5 0 1 CIRCULAR 0.024 RCP 179.6 186.8 None 0.36 299.8 318.5 Downstream 434.1 402.0 Both Upstream and Downstream 498.1 412.6 Both Upstream and Downstream PIPE10364 A1 ZPIP14176 2.5 0 1 CIRCULAR 0.032 RCP 20.5 20.5 None 0.28 35.5 35.7 None 54.0 56.2 Downstream 65.2 57.3 Both Upstream and Downstream PIPE10201 A1 ZPIP10746 2 0 1 CIRCULAR 0.012 CIPCP 4.9 4.8 None 0.23 8.0 7.9 None 12.1 14.0 None 13.6 16.6 None PIPE10311 A1 ZPIP13933 4 0 1 CIRCULAR 0.007 RCP 48.6 46.2 None 0.39 95.3 67.1 None 144.6 83.5 None 165.7 92.8 None PIPE10317 A1 ZPIP13990 1.5 0 1 CIRCULAR 0.014 RCP 0.3 6.3 None 0.5 0.6 7.3 Both Upstream and Downstream 0.7 8.2 Both Upstream and Downstream 0.8 9.7 Both Upstream and Downstream PIPE10323 A1 ZPIP17076 2 0 1 CIRCULAR 0.056 RCP 12.4 12.5 None 0.23 23.1 22.7 None 36.6 36.3 None 42.2 41.4 None PIPE10662 A1 ZPIP10678 2 0 1 CIRCULAR 0.020 RCP 7.7 7.8 None 0.24 13.4 14.0 None 20.5 21.9 None 23.4 24.8 None CHAN10008 A1 CH013B 0 0 1 IRREGULAR 0.010 Earthen 56.4 56.4 None 0.2 119.3 119.3 None 192.0 192.0 None 225.4 225.2 None PIPE10032 A1 ZPIP16941 2.5 0 1 CIRCULAR 0.064 RCP 24.6 24.6 None 0.24 46.0 46.0 None 69.6 69.5 None 80.4 80.1 None PIPE10208 A1 ZPIP10750 3 0 1 CIRCULAR 0.084 RCP 53.6 53.7 None 0.28 87.5 87.7 None 130.7 128.2 None 148.7 149.9 None PIPE10278 A1 ZPIP13883 3.5 0 1 CIRCULAR 0.028 RCP 41.1 41.5 None 0.25 77.3 76.4 None 118.7 116.1 None 136.8 128.7 None PIPE10622 A1 ZPIP17067 2 0 1 CIRCULAR 0.013 RCP 7.5 7.5 None 0.3 12.0 12.0 None 17.5 17.5 None 19.7 19.7 None PIPE10073 A1 ZPIP16962 2 0 1 CIRCULAR 0.127 RCP 18.4 18.4 None 0.23 34.9 34.9 None 53.7 53.7 None 61.7 61.7 None PIPE10204 A1 ZPIP10749 3.5 0 1 CIRCULAR 0.051 RCP 57.4 57.6 None 0.25 97.3 97.5 None 150.2 155.8 None 172.5 173.7 None PIPE10273 A1 ZPIP10829 2.5 0 1 CIRCULAR 0.060 RCP 24.7 24.9 None 0.25 48.9 48.0 None 76.6 71.9 None 88.1 76.7 None PIPE10451 A1 ZPIP17256 2 0 1 CIRCULAR 0.021 ABS 8.8 8.8 None 0.27 14.3 14.5 None 21.6 22.4 None 24.7 25.1 None PIPE10555 A1 ZPIP17595 2.25 0 1 CIRCULAR 0.071 RCP 2.5 19.1 None 0.23 4.1 34.9 None 6.0 61.4 Both Upstream and Downstream 6.9 62.6 Both Upstream and Downstream PIPE10127 A1 ZPIP10687 2 0 1 CIRCULAR 0.060 RCP 13.5 13.5 None 0.24 23.3 23.3 None 35.5 35.1 None 40.5 41.6 Downstream PIPE10244 A1 ZPIP10778 6 0 1 CIRCULAR 0.029 RCP 281.9 294.1 None 0.41 414.2 506.4 None 544.3 544.4 None 597.2 543.7 Both Upstream and Downstream PIPE10342 A1 ZPIP14123 1.5 0 1 CIRCULAR 0.096 RCP 6.3 6.4 None 0.19 12.1 12.1 None 18.1 28.4 None 20.8 24.3 Both Upstream and Downstream CULV10026 A1 ZCUL073D 4 4 1 RECT_CLOSED 0.015 RCP 54.3 54.6 None 0.25 132.6 106.9 None 165.0 159.1 Both Upstream and Downstream 174.0 164.6 Both Upstream and Downstream PIPE10600 A1 ZPIP17883 2 0 1 CIRCULAR 0.055 RCP 13.1 13.2 None 0.25 25.1 25.0 None 38.9 35.4 None 44.7 39.8 None PIPE10291 A1 ZPIP13911 2.5 0 1 CIRCULAR 0.052 RCP 22.2 22.3 None 0.24 44.8 43.8 None 70.6 64.9 None 81.0 69.2 None PIPE10412 A1 ZPIP11222 2.25 0 1 CIRCULAR 0.015 RCP 8.8 9.1 None 0.24 15.3 15.7 None 23.4 24.3 None 26.8 27.7 None PIPE10510 A1 ZPIP15519 1.5 0 1 CIRCULAR 0.019 RCP 3.9 3.9 None 0.26 6.4 6.4 None 9.6 9.5 None 10.9 10.8 None PIPE10130 A1 ZPIP10690 1.5 0 1 CIRCULAR 0.009 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 8.9 None 0.0 7.3 None PIPE10274 A1 ZPIP10830 3 0 1 CIRCULAR 0.060 RCP 39.0 39.2 None 0.24 73.6 72.6 None 113.4 110.3 None 130.5 119.6 None PIPE10276 A1 ZPIP13880 3 0 1 CIRCULAR 0.061 RCP 38.9 39.2 None 0.24 73.6 72.6 None 113.3 110.2 None 130.5 119.7 None PIPE10347 A1 ZPIP10955 1.5 0 1 CIRCULAR 0.026 RCP 0.0 0.0 None 0 0.0 8.3 None 0.3 12.1 None 0.4 12.3 Downstream PIPE10468 A1 ZPIP14896 4.5 0 1 CIRCULAR 0.007 RCP 30.1 30.4 None 0.19 60.5 61.4 None 97.1 101.3 None 108.1 119.1 None PIPE10571 A1 ZPIP16079 2 0 1 CIRCULAR 0.052 CMP 5.2 5.2 None 0.19 10.4 10.4 None 17.3 17.3 None 20.1 20.1 None CULV10024 A1 ZCUL073B 4 4 1 RECT_CLOSED 0.019 RCP 59.8 60.2 None 0.24 142.9 111.5 None 180.5 166.6 Upstream 190.4 179.5 Upstream PIPE10119 A1 ZPIP13593 3 0 1 CIRCULAR 0.002 RCP 0.9 0.4 None 0.01 0.4 3.8 None 0.3 22.0 Both Upstream and Downstream 0.2 23.1 Both Upstream and Downstream PIPE10135 A1 ZPIP16996 1.5 0 1 CIRCULAR 0.025 RCP 3.0 3.0 None 0.18 5.2 5.2 None 7.8 10.6 None 8.9 11.7 None PIPE10179 A1 ZPIP13680 3 0 1 CIRCULAR 0.012 CIPCP 13.0 13.0 None 0.21 25.2 25.1 None 39.4 38.9 None 45.3 44.5 None PIPE10360 A1 ZPIP10980 4 0 1 CIRCULAR 0.040 CIPCP 64.1 64.1 None 0.26 107.1 105.7 None 161.5 162.1 None 183.2 176.7 None PIPE10423 A1 ZPIP14652 3 0 1 CIRCULAR 0.006 PVC 12.1 12.1 None 0.23 21.0 21.0 None 32.5 32.4 None 37.2 37.2 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 6 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
CULV10025 A1 ZCUL073C 4 4 1 RECT_CLOSED 0.014 RCP 49.3 49.6 None 0.23 123.2 105.9 None 151.4 159.7 Downstream 159.7 154.1 Downstream PIPE10637 A1 ZPIP14180 1.5 0 1 CIRCULAR 0.017 RCP 3.7 3.7 None 0.26 5.9 5.9 None 8.8 8.8 None 9.9 9.9 None PIPE10090 A1 ZPIP13546 3 0 1 CIRCULAR 0.029 RCP 22.0 22.0 None 0.19 43.9 44.0 None 68.4 68.8 None 78.7 79.3 None PIPE10196 A1 ZPIP13715 3.5 0 1 CIRCULAR 0.008 RCP 21.4 21.2 None 0.23 37.3 37.2 None 56.0 55.7 None 64.1 64.0 None PIPE10386 A1 ZPIP11008 2.5 0 1 CIRCULAR 0.034 RCP 16.3 16.4 None 0.22 29.9 29.4 None 46.9 46.7 None 54.0 53.2 None PIPE10023 A1 ZPIP13364 2.5 0 1 CIRCULAR 0.023 RCP 14.6 14.6 None 0.24 24.7 24.8 None 37.3 37.4 None 42.4 42.4 None PIPE10040 A1 ZPIP10613 2 0 1 CIRCULAR 0.023 RCP 3.3 3.3 None 0.1 6.6 6.6 None 10.2 23.3 None 11.8 24.1 Both Upstream and Downstream PIPE10072 A1 ZPIP13523 2 0 1 CIRCULAR 0.051 RCP 11.1 11.1 None 0.22 19.2 19.2 None 29.3 28.8 None 33.5 35.2 None PIPE10003 A1 ZPIP12759 2.25 0 1 CIRCULAR 0.027 RCP 10.9 10.9 None 0.22 19.6 19.8 None 29.7 30.5 None 34.0 34.4 None PIPE10138 A1 ZPIP10694 3 0 1 CIRCULAR 0.099 RCP 48.3 48.2 None 0.23 82.2 81.0 None 125.0 125.9 None 142.0 142.7 None PIPE10177 A1 ZPIP13678 3.5 0 1 CIRCULAR 0.013 CIPCP 19.6 19.6 None 0.2 38.1 38.1 None 59.4 59.2 None 68.3 68.1 None PIPE10293 A1 ZPIP13913 2.5 0 1 CIRCULAR 0.058 RCP 21.5 21.6 None 0.22 43.6 42.6 None 68.9 62.4 None 78.9 67.1 None PIPE10369 A1 ZPIP17104 2.5 0 1 CIRCULAR 0.034 CIPCP 13.5 13.5 None 0.21 23.6 23.7 None 36.1 35.7 None 41.3 44.5 Downstream PIPE10659 A1 ZPIP10757 1.5 0 1 CIRCULAR 0.005 RCP 1.9 1.9 None 0.25 2.9 3.1 None 4.2 4.4 None 4.8 5.1 None PIPE10195 A1 ZPIP13714 3.5 0 1 CIRCULAR 0.031 RCP 41.3 41.7 None 0.23 71.1 70.8 None 107.3 103.1 None 122.8 119.1 None PIPE10271 A1 ZPIP17053 2.5 0 1 CIRCULAR 0.063 RCP 22.1 22.2 None 0.22 44.6 43.7 None 70.4 64.4 None 80.8 69.1 None PIPE10458 A1 ZPIP14820 3.5 0 1 CIRCULAR 0.023 ABS 36.7 36.7 None 0.24 61.0 60.4 None 91.8 91.8 None 104.5 102.5 None PIPE10254 A1 ZPIP17034 3 0 1 CIRCULAR 0.058 RCP 34.3 34.5 None 0.22 62.8 62.5 None 97.0 95.5 None 111.4 105.4 None PIPE10429 A1 ZPIP14767 1.5 0 1 CIRCULAR 0.011 RCP 2.8 2.8 None 0.25 4.4 4.4 None 6.4 6.5 None 7.3 7.3 None PIPE10449 A1 ZPIP14815 2 0 1 CIRCULAR 0.015 ABS 7.0 7.0 None 0.25 11.2 11.1 None 16.5 16.5 None 18.7 18.4 None PIPE10639 A1 ZPIP14179 2 0 1 CIRCULAR 0.035 RCP 9.2 9.2 None 0.22 16.0 16.0 None 24.4 24.4 None 27.8 27.8 None PIPE10328 A1 ZPIP14008 2 0 1 CIRCULAR 0.048 RCP 9.5 9.5 None 0.19 17.8 17.4 None 28.3 27.9 None 32.7 32.3 None PIPE10373 A1 ZPIP14192 2 0 1 CIRCULAR 0.035 RCP 3.1 3.1 None 0.07 5.0 13.6 None 7.4 24.6 Both Upstream and Downstream 8.4 27.5 Both Upstream and Downstream PIPE10407 A1 ZPIP14536 2.5 0 1 CIRCULAR 0.017 RCP 13.3 13.3 None 0.25 21.3 21.3 None 31.3 31.1 None 35.4 34.6 None PIPE10470 A1 ZPIP14898 4.5 0 1 CIRCULAR 0.007 RCP 26.9 27.1 None 0.16 54.6 55.2 None 88.2 91.6 None 98.8 106.5 None PIPE10009 A1 ZPIP12762 3.5 0 1 CIRCULAR 0.036 RCP 42.6 42.9 None 0.22 73.3 73.1 None 110.6 106.6 None 126.6 123.0 None PIPE10103 A1 ZPIP10659 3 0 1 CIRCULAR 0.029 RCP 19.3 19.3 None 0.17 39.4 39.6 None 61.5 62.1 None 70.7 71.6 None PIPE10098 A1 ZPIP16974 3 0 1 CIRCULAR 0.029 RCP 19.2 19.3 None 0.17 39.5 39.7 None 61.7 62.3 None 71.0 71.8 None PIPE10102 A1 ZPIP10658 3 0 1 CIRCULAR 0.029 RCP 19.2 19.2 None 0.17 39.4 39.5 None 61.6 61.9 None 71.0 71.3 None PIPE10242 A1 ZPIP10776 1.5 0 1 CIRCULAR 0.037 RCP 0.0 2.6 None 0.13 0.9 3.9 None 1.5 4.7 None 1.5 12.8 Both Upstream and Downstream PIPE10368 A1 ZPIP17103 2.5 0 1 CIRCULAR 0.038 CIPCP 13.5 13.5 None 0.2 23.6 23.7 None 36.2 36.1 None 41.3 43.4 None PIPE10129 A1 ZPIP10689 2 0 1 CIRCULAR 0.078 RCP 8.4 8.4 None 0.13 19.0 19.1 None 30.7 34.8 None 35.6 39.2 None PIPE10313 A1 ZPIP10884 1.5 0 1 CIRCULAR 0.008 RCP 0.2 0.5 None 0.05 0.4 0.8 None 0.4 4.7 Both Upstream and Downstream 0.4 6.0 Both Upstream and Downstream PIPE10340 A1 ZPIP10954 1.5 0 1 CIRCULAR 0.113 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 14.8 Upstream 0.0 22.1 Both Upstream and Downstream PIPE10370 A1 ZPIP10987 2 0 1 CIRCULAR 0.007 RCP 3.1 3.1 None 0.17 5.0 5.0 None 7.4 12.0 Both Upstream and Downstream 8.4 11.8 Both Upstream and Downstream PIPE10387 A1 ZPIP14251 1.5 0 1 CIRCULAR 0.010 RCP 0.0 0.0 None 0 1.4 1.2 None 1.9 6.3 None 2.6 6.5 None PIPE10454 A1 ZPIP11318 2 0 1 CIRCULAR 0.016 ABS 6.6 6.6 None 0.23 10.7 10.6 None 15.9 15.8 None 18.1 18.0 None CULV10001 A1 ZCUL085A 3 6 2 RECT_CLOSED 0.004 RCP 40.2 40.4 None 0.16 83.8 84.0 None 129.6 130.0 None 156.1 156.6 None PIPE10198 A1 ZPIP13717 2.5 0 1 CIRCULAR 0.072 CIPCP 21.9 22.2 None 0.23 36.7 35.9 None 55.2 49.5 None 62.8 58.3 None PIPE10192 A1 ZPIP10743 3.5 0 1 CIRCULAR 0.042 RCP 42.7 43.0 None 0.21 73.4 73.2 None 110.9 107.2 None 126.9 123.4 None PIPE10405 A1 ZPIP11100 3 0 1 CIRCULAR 0.036 RCP 28.7 28.7 None 0.23 47.7 47.6 None 70.0 71.6 None 79.3 76.2 None PIPE10656 A1 ZPIP10753 1.75 0 1 CIRCULAR 0.116 RCP 11.7 11.7 None 0.22 18.8 18.8 None 27.8 28.2 None 31.4 32.2 None PIPE10008 A1 ZPIP10241 4 0 1 CIRCULAR 0.032 CIPCP 45.8 46.0 None 0.21 78.3 78.1 None 118.0 114.9 None 135.0 131.8 None PIPE10202 A1 ZPIP10747 1.5 0 1 CIRCULAR 0.037 RCP 3.8 3.8 None 0.19 6.9 6.2 None 10.2 10.2 None 12.8 11.9 None PIPE10424 A1 ZPIP11228 3 0 1 CIRCULAR 0.005 RCP 9.4 9.4 None 0.19 16.3 16.3 None 25.3 25.3 None 29.1 29.1 None PIPE10570 A1 ZPIP11949 2.5 0 1 CIRCULAR 0.005 RCP 4.7 4.7 None 0.17 9.2 9.2 None 14.2 14.2 None 16.2 16.4 None CULV10045 A1 ZCUL074C 3 8 3 RECT_CLOSED 0.010 RCP 110.8 110.8 None 0.13 230.2 230.2 None 426.8 407.8 None 547.4 517.6 None PIPE10145 A1 ZPIP17001 4 0 1 CIRCULAR 0.009 RCP 45.0 41.8 None 0.3 89.3 59.7 None 138.6 75.0 None 159.6 80.7 None PIPE10028 A1 ZPIP16937 2.5 0 1 CIRCULAR 0.086 RCP 23.1 23.1 None 0.19 39.4 39.4 None 61.2 61.1 None 69.3 69.2 None PIPE10133 A1 ZPIP13619 1.5 0 1 CIRCULAR 0.062 CIPCP 1.0 1.0 None 0.04 1.6 1.6 None 2.3 6.3 None 2.6 12.8 None PIPE10356 A1 ZPIP14170 5 0 1 CIRCULAR 0.036 CIPCP 102.7 98.5 None 0.23 186.3 184.2 None 278.3 239.7 Both Upstream and Downstream 325.2 244.9 Both Upstream and Downstream CULV10017 A1 ZCUL085B 3 6 2 RECT_CLOSED 0.004 RCP 38.8 38.9 None 0.15 81.7 82.0 None 126.8 127.2 None 153.1 153.5 None PIPE10577 A1 ZPIP11994 1.5 0 1 CIRCULAR 0.106 RCP 7.1 7.1 None 0.21 11.5 11.5 None 17.3 17.3 None 19.6 19.5 None PIPE10578 A1 ZPIP11995 1.5 0 1 CIRCULAR 0.105 RCP 7.1 7.1 None 0.21 11.5 11.5 None 17.3 17.3 None 19.6 19.6 None PIPE10601 A1 ZPIP17884 3 0 1 CIRCULAR 0.024 RCP 19.7 19.8 None 0.19 35.5 35.4 None 54.0 51.0 None 61.8 58.1 None PIPE10031 A1 ZPIP13440 2.5 0 1 CIRCULAR 0.091 RCP 20.6 20.6 None 0.17 39.1 39.1 None 59.7 59.8 None 68.7 68.8 None PIPE10219 A1 ZPIP13738 1.5 0 1 CIRCULAR 0.041 RCP 4.5 4.5 None 0.21 7.1 7.1 None 10.5 10.5 None 11.9 11.9 None PIPE10537 A1 ZPIP15623 1.5 0 1 CIRCULAR 0.048 RCP 2.6 2.6 None 0.11 4.7 4.8 None 7.3 7.3 None 8.4 12.9 None PIPE10020 A1 ZPIP16895 3 0 1 CIRCULAR 0.018 RCP 15.8 15.9 None 0.18 28.4 28.4 None 42.2 42.2 None 48.4 48.3 None PIPE10473 A1 ZPIP11371 4.5 0 1 CIRCULAR 0.007 RCP 21.4 21.4 None 0.13 44.8 45.1 None 74.2 76.2 None 86.7 87.7 None PIPE10167 A1 ZPIP13672 2.25 0 1 CIRCULAR 0.058 RCP 11.8 11.8 None 0.16 22.6 22.5 None 34.8 35.9 None 40.0 40.0 None CULV10002 A1 ZCUL082B 3 6 2 RECT_CLOSED 0.026 RCP 101.8 104.8 None 0.16 230.2 222.7 None 310.4 339.5 None 351.9 358.2 None PIPE10546 A1 ZPIP15767 2 0 1 CIRCULAR 0.048 RCP 7.1 7.1 None 0.14 13.9 13.9 None 23.0 23.0 None 26.7 26.5 None PIPE10573 A1 ZPIP16092 2 0 1 CIRCULAR 0.004 RCP 2.6 2.8 None 0.19 3.5 4.4 None 6.1 7.8 None 5.5 7.9 None PIPE10253 A1 ZPIP13787 1.5 0 1 CIRCULAR 0.010 RCP 4.1 0.7 None 0.06 1.8 2.8 None 0.7 4.1 Both Upstream and Downstream 0.6 5.5 Both Upstream and Downstream PIPE10319 A1 ZPIP10888 3 0 1 CIRCULAR 0.009 RCP 12.1 12.2 None 0.19 19.7 19.8 None 29.4 29.4 None 33.3 33.4 None PIPE10638 A1 ZPIP10983 2.5 0 1 CIRCULAR 0.041 CIPCP 12.3 12.3 None 0.17 21.6 21.6 None 33.2 33.2 None 37.9 37.9 None CULV10019 A1 ZCUL11730 2 7 1 RECT_CLOSED 0.032 RCP 40.6 41.2 None 0.17 75.4 90.1 None 114.5 111.7 Downstream 125.8 124.8 Downstream PIPE10180 A1 ZPIP17020 4 0 1 CIRCULAR 0.068 RCP 66.7 67.3 None 0.18 112.2 112.4 None 166.2 162.1 None 189.8 192.1 None PIPE10268 A1 ZPIP10823 3.5 0 1 CIRCULAR 0.054 RCP 38.1 38.3 None 0.16 70.8 70.4 None 109.6 108.1 None 125.9 120.1 None PIPE10469 A1 ZPIP14897 2 0 1 CIRCULAR 0.005 RCP 2.6 2.6 None 0.17 4.4 4.4 None 6.8 6.8 None 7.8 7.8 None PIPE10641 A1 ZPIP14178 1.5 0 1 CIRCULAR 0.097 RCP 2.3 2.3 None 0.07 4.2 4.2 None 6.4 15.2 None 7.3 16.8 Both Upstream and Downstream PIPE10651 A1 4 0 1 CIRCULAR 0.016 RCP 48.5 45.8 None 0.25 95.2 67.1 None 146.2 84.7 None 167.1 92.4 None PIPE10123 A1 ZPIP13602 4 0 1 CIRCULAR 0.012 RCP 44.3 40.8 None 0.26 88.2 58.2 None 137.0 72.7 None 158.2 78.9 None PIPE10295 A1 ZPIP10847 2.5 0 1 CIRCULAR 0.087 RCP 19.3 19.3 None 0.16 39.9 39.1 None 63.6 56.7 None 72.8 60.9 None CULV10018 A1 ZCUL082C 3 6 2 RECT_CLOSED 0.032 RCP 105.9 108.9 None 0.15 210.4 231.9 None 260.7 351.9 None 284.8 368.5 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 7 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE10586 A1 ZPIP18039 3.5 0 1 CIRCULAR 0.017 RCP 17.4 18.5 None 0.14 36.9 34.1 Both Upstream and Downstream 59.2 55.8 Both Upstream and Downstream 70.0 65.7 Both Upstream and Downstream PIPE10124 A1 ZPIP13603 4 0 1 CIRCULAR 0.016 RCP 47.8 45.0 None 0.25 94.1 65.6 None 145.0 82.8 None 165.9 89.4 None PIPE10408 A1 ZPIP17195 1.5 0 1 CIRCULAR 0.033 RCP 3.5 3.5 None 0.19 5.6 5.6 None 8.2 8.2 None 9.3 9.3 None PIPE10630 A1 ZPIP11910 1.5 0 1 CIRCULAR 0.020 RCP 2.7 2.7 None 0.18 4.4 4.4 None 6.4 6.4 None 7.3 7.2 None PIPE10188 A1 ZPIP13697 2.5 0 1 CIRCULAR 0.083 RCP 14.8 14.8 None 0.13 30.9 30.9 None 49.0 48.9 None 56.6 56.4 None PIPE10205 A1 ZPIP13721 3.5 0 1 CIRCULAR 0.098 RCP 53.6 53.7 None 0.17 87.5 87.8 None 130.9 133.1 None 148.8 149.9 None PIPE10359 A1 ZPIP10979 2 0 1 CIRCULAR 0.059 RCP 6.1 6.1 None 0.11 10.4 10.4 None 15.5 26.8 None 17.6 26.5 Upstream PIPE10068 A1 ZPIP13519 2 0 1 CIRCULAR 0.023 RCP 4.9 4.9 None 0.14 8.8 8.9 None 13.7 13.7 None 15.7 16.0 None PIPE10070 A1 ZPIP10639 1.5 0 1 CIRCULAR 0.076 RCP 4.1 4.1 None 0.14 7.5 7.5 None 11.6 11.6 None 13.3 13.3 None PIPE10197 A1 ZPIP13716 2.5 0 1 CIRCULAR 0.128 CIPCP 21.9 22.2 None 0.17 36.7 35.9 None 55.3 49.6 None 62.8 58.3 None PIPE10246 A1 ZPIP13781 1.5 0 1 CIRCULAR 0.015 RCP 0.0 1.5 None 0.12 1.2 7.2 None 2.9 4.6 Downstream 2.7 5.9 Both Upstream and Downstream PIPE10509 A1 ZPIP15518 1.5 0 1 CIRCULAR 0.050 RCP 3.8 3.8 None 0.16 6.3 6.3 None 9.5 9.5 None 10.8 10.7 None CULV10031 A1 ZCUL079A 3 8 1 RECT_CLOSED 0.003 RCP 23.9 25.5 None 0.17 47.2 45.1 None 52.2 82.6 None 59.0 69.4 None PIPE10149 A1 ZPIP17003 1.5 0 1 CIRCULAR 0.021 RCP 2.1 2.2 None 0.15 3.3 7.4 Both Upstream and Downstream 4.9 6.7 Both Upstream and Downstream 5.5 6.8 Both Upstream and Downstream PIPE10217 A1 ZPIP13735 1.5 0 1 CIRCULAR 0.056 RCP 2.9 2.9 None 0.12 4.7 4.7 None 7.0 7.0 None 7.9 11.1 None PIPE10415 A1 ZPIP17223 1.75 0 1 CIRCULAR 0.005 PVC 1.4 1.8 None 0.15 2.5 3.0 None 3.7 4.4 None 4.2 5.3 None PIPE10475 A1 ZPIP11373 4.5 0 1 CIRCULAR 0.010 RCP 21.4 21.5 None 0.11 44.6 44.9 None 73.8 76.5 None 86.5 87.4 None PIPE10114 A1 ZPIP13571 1.5 0 1 CIRCULAR 0.050 RCP 1.1 1.1 None 0.05 1.8 1.8 None 2.6 9.0 None 2.9 10.2 None PIPE10213 A1 ZPIP13730 1.5 0 1 CIRCULAR 0.009 CIPCP 1.5 1.5 None 0.17 2.3 2.3 None 3.3 3.4 None 3.7 3.9 None PIPE10303 A1 ZPIP13920 1.5 0 1 CIRCULAR 0.053 RCP 3.4 3.4 None 0.14 6.1 6.1 None 9.2 9.2 None 10.6 10.5 None PIPE10413 A1 ZPIP11223 2 0 1 CIRCULAR 0.056 PVC 7.7 7.7 None 0.14 13.3 13.3 None 20.4 20.4 None 23.4 23.4 None PIPE10558 A1 ZPIP15902 1.5 0 1 CIRCULAR 0.042 CMP 0.1 0.0 None 0 0.1 0.0 None 0.1 1.9 None 0.1 5.1 None PIPE10618 A1 ZPIP13426 4.5 0 1 CIRCULAR 0.024 RCP 46.2 46.6 None 0.15 78.6 79.2 None 119.8 120.1 None 135.7 133.9 Downstream PIPE10623 A1 ZPIP17069 2.5 0 1 CIRCULAR 0.007 RCP 5.0 5.0 None 0.15 8.4 8.4 None 12.7 12.7 None 14.4 14.4 None PIPE10110 A1 ZPIP13563 2 0 1 CIRCULAR 0.040 RCP 4.1 4.1 None 0.09 7.5 7.5 None 11.6 16.0 None 13.2 19.5 Upstream PIPE10194 A1 ZPIP10745 1.5 0 1 CIRCULAR 0.010 CIPCP 1.4 1.4 None 0.15 2.3 2.3 None 3.4 3.5 None 3.8 3.9 None PIPE10620 A1 ZPIP13601 1.5 0 1 CIRCULAR 0.068 RCP 2.4 2.4 None 0.09 5.3 4.6 None 6.6 12.1 None 8.1 11.9 None PIPE10660 A1 ZPIP11018 2.25 0 1 CIRCULAR 0.034 RCP 7.7 7.7 None 0.13 14.6 14.4 None 22.4 22.5 None 25.6 24.7 None CULV10043 A1 ZCUL074C 3 8 3 RECT_CLOSED 0.020 RCP 112.0 112.0 None 0.09 232.4 232.4 None 440.5 459.5 None 661.5 524.2 None PIPE10155 A1 ZPIP17007 1.5 0 1 CIRCULAR 0.056 CIPCP 0.0 0.0 None 0 0.0 0.0 None 0.0 8.2 None 0.0 9.0 None PIPE10169 A1 ZPIP13674 2.25 0 1 CIRCULAR 0.071 RCP 9.9 9.9 None 0.12 19.5 19.5 None 30.3 30.3 None 34.9 34.9 None PIPE10287 A1 ZPIP10835 2.5 0 1 CIRCULAR 0.010 RCP 6.1 6.2 None 0.15 10.0 10.0 None 14.8 14.9 None 16.8 16.9 None PIPE10642 A1 ZPIP14177 1.5 0 1 CIRCULAR 0.064 RCP 1.5 1.5 None 0.06 2.5 2.5 None 3.8 10.8 None 4.4 11.1 Both Upstream and Downstream PIPE10200 A1 ZPIP13720 2 0 1 CIRCULAR 0.018 CIPCP 2.8 2.7 None 0.1 4.7 4.7 None 7.2 7.1 None 8.2 10.8 None PIPE10264 A1 ZPIP13862 1.5 0 1 CIRCULAR 0.120 RCP 5.2 5.2 None 0.14 8.8 8.8 None 13.1 13.1 None 14.9 14.9 None PIPE10377 A1 ZPIP10989 2 0 1 CIRCULAR 0.051 RCP 2.4 7.3 None 0.14 5.1 19.8 Upstream 10.9 25.4 Both Upstream and Downstream 30.3 20.8 Both Upstream and Downstream PIPE10512 A1 ZPIP15521 1.5 0 1 CIRCULAR 0.182 RCP 5.7 5.7 None 0.13 9.9 9.9 None 14.9 14.9 None 17.0 18.3 None PIPE10099 A1 ZPIP16975 3 0 1 CIRCULAR 0.135 RCP 27.8 27.8 None 0.11 55.0 55.2 None 85.4 86.0 None 98.3 98.7 None PIPE10106 A1 ZPIP10660 3 0 1 CIRCULAR 0.136 RCP 27.8 27.8 None 0.11 55.0 55.1 None 85.5 87.3 None 98.3 98.7 None PIPE10158 A1 ZPIP10711 1.5 0 1 CIRCULAR 0.058 CIPCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 8.7 None PIPE10258 A1 ZPIP13807 3.5 0 1 CIRCULAR 0.156 RCP 51.0 51.3 None 0.13 92.5 92.4 None 142.6 164.8 None 163.8 158.0 None PIPE10285 A1 ZPIP17055 1.5 0 1 CIRCULAR 0.020 RCP 0.0 0.0 None 0 0.0 1.9 None 0.0 5.5 None 0.1 6.1 Downstream PIPE10308 A1 ZPIP13922 1.5 0 1 CIRCULAR 0.063 RCP 3.3 3.4 None 0.13 6.0 6.0 None 9.1 9.1 None 10.4 10.4 None CULV10044 A1 ZCUL074C 3 8 3 RECT_CLOSED 0.022 RCP 112.1 112.1 None 0.09 232.5 232.6 None 383.8 448.8 None 457.9 524.5 None PIPE10083 A1 ZPIP13534 2 0 1 CIRCULAR 0.045 RCP 4.2 4.2 None 0.09 8.0 8.0 None 12.4 21.3 Upstream 14.3 18.6 Both Upstream and Downstream PIPE10120 A1 ZPIP13597 2.5 0 1 CIRCULAR 0.012 RCP 5.0 5.2 None 0.11 10.7 9.7 None 15.2 19.2 None 16.8 18.0 None PIPE10428 A1 ZPIP11291 1.5 0 1 CIRCULAR 0.009 RCP 1.5 1.5 None 0.15 2.4 2.4 None 3.5 3.5 None 3.9 3.9 None PIPE10430 A1 ZPIP14768 1.5 0 1 CIRCULAR 0.009 RCP 1.5 1.5 None 0.15 2.4 2.4 None 3.5 3.5 None 3.9 3.9 None PIPE10433 A1 ZPIP11309 1.5 0 1 CIRCULAR 0.005 RCP 0.0 0.0 None 0 0.4 2.9 None 2.9 3.8 None 3.8 3.0 None PIPE10516 A1 ZPIP11695 2 0 1 CIRCULAR 0.034 RCP 5.7 5.7 None 0.14 9.2 9.2 None 13.7 13.7 None 15.5 16.2 None PIPE10621 A1 ZPIP17068 2 0 1 CIRCULAR 0.012 RCP 3.4 3.4 None 0.14 5.6 5.6 None 8.4 8.4 None 9.6 9.6 None PIPE10017 A1 ZPIP12860 1.5 0 1 CIRCULAR 0.079 RCP 0.0 0.0 None 0 0.0 0.0 None 0.2 8.2 Downstream 1.0 11.3 Both Upstream and Downstream PIPE10121 A1 ZPIP10679 2 0 1 CIRCULAR 0.026 PVC 4.2 4.2 None 0.12 7.5 8.2 None 11.5 12.2 None 13.2 13.8 None PIPE10394 A1 ZPIP11058 4.5 0 1 CIRCULAR 0.116 RCP 77.7 77.7 None 0.12 158.2 161.3 None 246.8 244.3 Downstream 280.4 256.8 Both Upstream and Downstream PIPE10431 A1 ZPIP14769 1.5 0 1 CIRCULAR 0.009 RCP 1.5 1.5 None 0.14 2.4 2.4 None 3.5 3.5 None 3.9 3.9 None PIPE10513 A1 ZPIP17489 1.5 0 1 CIRCULAR 0.025 RCP 2.2 2.2 None 0.13 3.4 3.4 None 5.1 5.1 None 5.7 6.3 None PIPE10018 A1 ZPIP12861 1.5 0 1 CIRCULAR 0.034 RCP 0.0 0.0 None 0 0.1 0.1 None 0.3 10.7 Both Upstream and Downstream 0.9 7.1 Both Upstream and Downstream PIPE10230 A1 ZPIP13746 2 0 1 CIRCULAR 0.021 RCP 3.7 3.7 None 0.11 6.9 6.9 None 10.6 10.7 None 12.1 12.2 None PIPE10034 A1 ZPIP16943 1.5 0 1 CIRCULAR 0.019 RCP 1.8 1.8 None 0.12 3.0 3.0 None 4.6 4.6 None 5.2 5.2 None PIPE10058 A1 ZPIP10632 2 0 1 CIRCULAR 0.130 RCP 8.2 8.2 None 0.1 16.3 16.3 None 25.5 25.5 None 29.4 29.4 None PIPE10312 A1 ZPIP17063 3.5 0 1 CIRCULAR 0.152 RCP 45.6 45.9 None 0.12 83.5 83.3 None 129.2 127.7 None 148.5 142.4 None PIPE10324 A1 ZPIP10894 1.5 0 1 CIRCULAR 0.015 RCP 1.2 1.2 None 0.09 2.5 2.5 None 4.0 4.0 None 4.6 4.6 None PIPE10505 A1 ZPIP18036 3 0 1 CIRCULAR 0.119 RCP 18.4 18.4 None 0.08 42.7 42.7 None 67.2 74.4 None 77.7 82.3 Downstream CULV10041 A1 ZCUL074G 3 8 3 RECT_CLOSED 0.026 RCP 110.8 110.8 None 0.08 230.2 230.2 None 430.8 410.2 None 546.4 513.5 None PIPE10186 A1 ZPIP13694 2.25 0 1 CIRCULAR 0.100 RCP 10.9 10.9 None 0.11 19.6 19.7 None 29.7 30.3 None 34.0 34.1 None PIPE10304 A1 ZPIP10850 2 0 1 CIRCULAR 0.005 RCP 1.8 1.8 None 0.11 3.3 3.3 None 5.0 5.1 None 5.8 5.8 None PIPE10310 A1 ZPIP13924 1.5 0 1 CIRCULAR 0.082 RCP 3.5 3.5 None 0.11 6.2 6.2 None 9.3 9.3 None 10.6 10.6 None PIPE10547 A1 ZPIP15768 1.5 0 1 CIRCULAR 0.041 RCP 2.3 2.3 None 0.11 4.3 4.3 None 6.4 6.5 None 7.3 7.4 None PIPE10207 A1 ZPIP13723 1.5 0 1 CIRCULAR 0.043 RCP 2.8 2.8 None 0.13 4.5 4.5 None 6.6 6.6 None 7.4 7.4 None CULV10046 A1 ZCUL074C 3 8 3 RECT_CLOSED 0.031 RCP 111.7 111.7 None 0.07 231.9 231.9 None 458.5 474.0 None 673.4 524.3 None PIPE10024 A1 ZPIP13366 3 0 1 CIRCULAR 0.063 RCP 19.1 19.2 None 0.11 32.1 32.3 None 48.4 48.6 None 55.1 55.2 None PIPE10089 A1 ZPIP16968 2 0 1 CIRCULAR 0.141 RCP 1.9 1.9 None 0.02 3.2 3.5 None 4.7 39.9 Upstream 5.3 27.7 Both Upstream and Downstream PIPE10150 A1 ZPIP10705 1.5 0 1 CIRCULAR 0.010 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 1.4 None 0.0 3.4 None PIPE10434 A1 ZPIP11310 1.5 0 1 CIRCULAR 0.006 RCP 0.0 0.0 None 0 0.0 2.0 None 0.3 3.0 None 2.0 2.8 None PIPE10108 A1 ZPIP10662 1.5 0 1 CIRCULAR 0.162 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 12.5 None 0.0 13.8 None PIPE10199 A1 ZPIP13719 2 0 1 CIRCULAR 0.017 CIPCP 2.8 2.8 None 0.11 4.7 4.7 None 7.2 7.1 None 8.3 8.2 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 8 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE10532 A1 ZPIP15619 2.5 0 1 CIRCULAR 0.023 RCP 7.5 7.5 None 0.12 11.9 11.9 None 17.5 17.5 None 19.8 19.8 None PIPE10535 A1 ZPIP15621 1.5 0 1 CIRCULAR 0.028 RCP 2.0 2.1 None 0.12 3.2 3.1 None 4.3 5.0 None 4.6 5.6 None PIPE10164 A1 ZPIP10717 1.5 0 1 CIRCULAR 0.054 CIPCP 2.3 2.3 None 0.11 3.9 3.9 None 5.8 5.8 None 6.7 6.5 None PIPE10288 A1 ZPIP10836 2.5 0 1 CIRCULAR 0.009 RCP 4.5 4.6 None 0.11 7.4 7.4 None 10.9 10.9 None 12.4 12.4 None PIPE10514 A1 ZPIP17490 1.5 0 1 CIRCULAR 0.017 RCP 1.3 1.3 None 0.1 2.0 2.1 None 3.0 3.1 None 3.3 4.2 None PIPE10625 A1 ZPIP15618 2.5 0 1 CIRCULAR 0.025 RCP 7.6 7.6 None 0.12 12.2 12.2 None 17.9 17.9 None 20.2 20.2 None PIPE10515 A1 ZPIP17491 1.5 0 1 CIRCULAR 0.019 RCP 1.4 1.4 None 0.09 2.1 2.1 None 3.1 3.3 None 3.6 4.4 None PIPE10590 A1 ZPIP12263 2 0 1 CIRCULAR 0.103 CMP 0.8 12.3 None 0.31 1.2 11.7 Both Upstream and Downstream 1.8 8.6 Both Upstream and Downstream 2.0 11.9 Both Upstream and Downstream PIPE10013 A1 ZPIP16749 4 0 1 CIRCULAR 0.035 RCP 44.3 40.9 None 0.15 88.0 58.0 None 136.6 72.4 None 157.9 78.6 None PIPE10060 A1 ZPIP13510 1.5 0 1 CIRCULAR 0.011 RCP 1.1 1.1 None 0.1 1.9 1.9 None 2.9 2.9 None 3.3 3.3 None PIPE10484 A1 ZPIP11379 4 0 1 CIRCULAR 0.029 RCP 16.9 16.8 None 0.07 35.9 35.9 None 60.0 61.3 None 70.3 69.6 None PIPE10594 A1 ZPIP12275 3 0 1 CIRCULAR 0.065 RCP 17.6 17.6 None 0.1 32.1 32.0 None 49.0 44.8 None 56.2 50.1 None PIPE10036 A1 ZPIP10598 1.5 0 1 CIRCULAR 0.317 RCP 5.0 5.0 None 0.08 9.0 9.0 None 13.9 14.6 None 15.9 16.5 None PIPE10088 A1 ZPIP16967 2 0 1 CIRCULAR 0.293 RCP 0.0 0.0 None 0 0.0 0.8 None 0.0 37.7 Both Upstream and Downstream 0.0 34.3 Both Upstream and Downstream PIPE10125 A1 ZPIP10683 1.5 0 1 CIRCULAR 0.201 PVC 4.2 4.2 None 0.09 7.3 7.3 None 11.2 11.0 None 12.8 13.0 None CULV10040 A1 ZCUL074G 3 8 3 RECT_CLOSED 0.041 RCP 109.1 109.1 None 0.06 227.3 227.3 None 416.8 407.4 None 500.7 500.8 None PIPE10280 A1 ZPIP10831 1.5 0 1 CIRCULAR 0.051 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 6.5 None PIPE10483 A1 ZPIP11378 4.5 0 1 CIRCULAR 0.117 RCP 100.0 53.9 None 0.08 143.4 102.7 None 203.9 155.1 None 229.1 181.0 None PIPE10002 A1 ZPIP10237 3.5 0 1 CIRCULAR 0.059 RCP 41.1 38.4 None 0.16 80.8 49.5 None 125.5 59.4 None 145.0 63.8 None PIPE10182 A1 ZPIP17022 1.5 0 1 CIRCULAR 0.050 CIPCP 0.0 0.0 None 0 0.0 0.0 None 0.0 1.4 None 0.4 5.2 None PIPE10261 A1 ZPIP13836 2 0 1 CIRCULAR 0.075 RCP 5.8 5.8 None 0.09 9.6 9.6 None 14.3 14.4 None 16.3 16.3 None PIPE10286 A1 ZPIP10834 1.5 0 1 CIRCULAR 0.028 RCP 1.7 1.7 None 0.1 2.8 2.8 None 4.1 4.1 None 4.6 4.6 None PIPE10587 A1 ZPIP18040 1.5 0 1 CIRCULAR 0.021 RCP 1.1 1.1 None 0.07 2.8 3.3 Both Upstream and Downstream 13.4 4.2 Both Upstream and Downstream 15.1 3.9 Both Upstream and Downstream PIPE10624 A1 ZPIP10887 2.5 0 1 CIRCULAR 0.018 RCP 5.0 5.0 None 0.09 8.4 8.4 None 12.7 12.7 None 14.4 14.4 None PIPE10045 A1 ZPIP10615 1.5 0 1 CIRCULAR 0.043 RCP 1.7 1.7 None 0.08 3.1 3.1 None 4.7 4.7 None 5.4 5.4 None PIPE10476 A1 ZPIP14925 2 0 1 CIRCULAR 0.062 RCP 3.9 3.9 None 0.07 7.6 7.6 None 12.0 12.0 None 13.9 13.9 None PIPE10479 A1 ZPIP14933 1.5 0 1 CIRCULAR 0.157 RCP 1.6 1.6 None 0.04 2.7 2.7 None 4.0 9.6 None 4.5 10.4 Both Upstream and Downstream PIPE10647 A1 ZPIP16920 1.5 0 1 CIRCULAR 0.025 RCP 1.5 1.5 None 0.09 2.5 2.5 None 3.7 3.7 None 4.2 4.1 None PIPE10042 A1 ZPIP13476 1.5 0 1 CIRCULAR 0.061 RCP 0.7 0.7 None 0.03 1.6 1.6 None 2.5 6.3 None 2.8 6.4 Both Upstream and Downstream PIPE10255 A1 ZPIP17039 1.5 0 1 CIRCULAR 0.322 RCP 5.1 5.2 None 0.09 8.5 8.5 None 12.6 12.6 None 14.4 14.3 None PIPE10265 A1 ZPIP13863 2 0 1 CIRCULAR 0.123 RCP 6.8 6.8 None 0.09 11.4 11.4 None 17.0 17.0 None 19.3 19.4 None PIPE10284 A1 ZPIP17054 1.5 0 1 CIRCULAR 0.242 RCP 4.6 4.6 None 0.09 7.4 7.4 None 10.9 10.9 None 12.4 12.4 None PIPE10290 A1 ZPIP13892 1.5 0 1 CIRCULAR 0.033 RCP 1.6 1.7 None 0.09 2.7 2.7 None 4.0 4.0 None 4.5 4.6 None PIPE10371 A1 ZPIP10988 2 0 1 CIRCULAR 0.031 RCP 2.2 2.2 None 0.06 3.7 3.7 None 5.6 8.9 Downstream 6.3 9.5 Both Upstream and Downstream PIPE10652 A1 ZPIP12278 1.5 0 1 CIRCULAR 0.032 RCP 0.1 0.0 None 0 0.5 0.1 None 0.7 10.8 Downstream 0.4 4.4 Downstream CULV10042 A1 ZCUL074C 3 8 3 RECT_CLOSED 0.062 RCP 112.0 112.0 None 0.05 232.4 232.4 None 502.3 472.1 None 664.3 523.7 None PIPE10185 A1 ZPIP10730 1.5 0 1 CIRCULAR 0.090 RCP 2.8 2.8 None 0.09 4.5 4.5 None 6.6 6.6 None 7.4 7.4 None PIPE10416 A1 ZPIP17224 1.5 0 1 CIRCULAR 0.135 RCP 3.2 3.2 None 0.08 5.3 5.3 None 7.9 7.9 None 8.9 8.9 None PIPE10560 A1 ZPIP15904 3 0 1 CIRCULAR 0.053 CMP 0.1 0.0 None 0 0.3 0.0 None 0.4 7.1 None 0.5 19.3 None PIPE10043 A1 ZPIP13478 1.5 0 1 CIRCULAR 0.109 RCP 2.5 2.5 None 0.07 4.4 4.4 None 6.8 6.8 None 7.8 7.8 None PIPE10128 A1 ZPIP10688 2 0 1 CIRCULAR 0.009 RCP 1.3 1.3 None 0.06 2.6 2.6 None 4.0 4.0 None 4.6 4.6 None PIPE10227 A1 ZPIP13743 1.5 0 1 CIRCULAR 0.080 RCP 2.5 2.5 None 0.08 4.0 4.0 None 5.8 5.8 None 6.6 6.6 None PIPE10447 A1 ZPIP16679 2 0 1 CIRCULAR 0.126 ABS 6.5 6.5 None 0.08 10.5 10.5 None 15.7 15.7 None 17.9 17.9 None PIPE10404 A1 ZPIP11099 1.5 0 1 CIRCULAR 0.124 RCP 2.7 2.7 None 0.07 4.6 4.6 None 6.8 7.0 None 7.9 7.9 None PIPE10631 A1 ZPIP15949 1.5 0 1 CIRCULAR 0.109 RCP 2.7 2.7 None 0.08 4.3 4.3 None 6.4 6.4 Downstream 7.2 7.2 Downstream PIPE10071 A1 ZPIP13522 2 0 1 CIRCULAR 0.120 RCP 5.0 5.0 None 0.06 9.0 9.0 None 13.8 13.9 None 15.8 15.9 None PIPE10112 A1 ZPIP13565 1.5 0 1 CIRCULAR 0.170 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 9.6 None 0.0 8.8 None PIPE10151 A1 ZPIP10706 2 0 1 CIRCULAR 0.009 RCP 0.0 0.1 None 0 0.2 0.2 None 0.4 1.8 None 0.4 4.2 None PIPE10269 A1 ZPIP13867 2 0 1 CIRCULAR 0.169 RCP 5.8 5.8 None 0.06 9.6 9.6 None 14.3 25.4 None 16.3 17.5 None PIPE10400 A1 ZPIP14414 1.5 0 1 CIRCULAR 0.013 RCP 0.0 0.0 None 0 0.4 0.4 None 1.1 0.7 None 2.3 2.3 None PIPE10565 A1 ZPIP11908 2.5 0 1 CIRCULAR 0.270 RCP 13.4 13.4 None 0.06 23.3 23.4 None 35.0 35.2 None 40.0 40.4 None PIPE10044 A1 ZPIP13479 2 0 1 CIRCULAR 0.124 RCP 4.7 4.7 None 0.06 8.2 8.2 None 12.4 12.5 None 14.2 14.2 None PIPE10143 A1 ZPIP16999 4 0 1 CIRCULAR 0.093 RCP 44.3 40.9 None 0.09 88.0 58.0 None 136.6 72.3 None 157.9 78.5 None PIPE10283 A1 ZPIP13888 1.5 0 1 CIRCULAR 0.058 RCP 1.7 1.7 None 0.07 2.8 2.8 None 4.1 4.1 None 4.6 4.6 None PIPE10417 A1 ZPIP17225 1.5 0 1 CIRCULAR 0.228 PVC 3.3 3.3 None 0.06 5.3 5.3 None 7.9 7.9 None 8.9 8.9 None PIPE10035 A1 ZPIP10597 2 0 1 CIRCULAR 0.009 RCP 0.1 0.1 None 0 0.1 0.2 None 0.2 0.3 None 0.2 3.7 None PIPE10391 A1 ZPIP14328 1.5 0 1 CIRCULAR 0.079 RCP 0.0 0.0 None 0 0.0 3.8 None 0.5 4.2 Both Upstream and Downstream 0.8 5.0 Both Upstream and Downstream PIPE10463 A1 ZPIP14869 2 0 1 CIRCULAR 0.111 RCP 0.0 0.0 None 0 0.0 0.9 None 0.0 14.5 Both Upstream and Downstream 0.4 12.8 Both Upstream and Downstream PIPE10655 A1 ZPIP10754 1.5 0 1 CIRCULAR 0.062 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 2.1 None 0.0 4.5 None PIPE10055 A1 ZPIP13504 1.5 0 1 CIRCULAR 0.177 RCP 2.4 2.4 None 0.05 4.1 4.1 None 6.3 6.3 None 7.1 7.1 None PIPE10299 A1 ZPIP13916 2 0 1 CIRCULAR 0.036 RCP 2.1 2.1 None 0.05 4.0 4.0 None 6.1 6.1 None 7.0 7.0 None PIPE10673 A1 ZPIP11098 1.5 0 1 CIRCULAR 0.019 RCP 0.8 0.8 None 0.06 1.4 1.4 None 2.0 2.0 None 2.3 2.3 None PIPE10050 A1 ZPIP16661 2 0 1 CIRCULAR 0.104 RCP 2.7 2.7 None 0.04 5.4 5.4 None 8.4 8.6 None 9.6 10.8 None PIPE10175 A1 ZPIP10726 1.5 0 1 CIRCULAR 0.074 CIPCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 3.8 None PIPE10218 A1 ZPIP13736 1.5 0 1 CIRCULAR 0.041 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 2.3 None 0.0 3.3 None PIPE10435 A1 ZPIP14803 1.5 0 1 CIRCULAR 0.005 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.6 None 0.0 1.2 None PIPE10511 A1 ZPIP15520 1.5 0 1 CIRCULAR 0.056 RCP 1.1 1.1 None 0.04 2.0 2.0 None 3.2 3.2 None 3.7 3.7 None PIPE10016 A1 ZPIP10296 1.5 0 1 CIRCULAR 0.111 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 2.9 None 0.0 5.1 None PIPE10399 A1 ZPIP14413 1.5 0 1 CIRCULAR 0.018 RCP 0.0 0.0 None 0 0.0 0.0 None 0.1 0.7 None 0.6 2.0 None PIPE10004 A1 ZPIP16747 4 0 1 CIRCULAR 0.109 RCP 41.1 38.4 None 0.08 80.8 49.5 None 125.5 59.4 None 145.0 63.8 None PIPE10583 A1 ZPIP17663 1.5 0 1 CIRCULAR 0.015 RCP 0.0 0.1 None 0 0.1 0.1 None 0.1 1.5 None 0.2 1.7 None PIPE10046 A1 ZPIP10616 1.5 0 1 CIRCULAR 0.191 RCP 1.7 1.7 None 0.04 3.1 3.1 None 4.7 4.7 None 5.4 5.4 None PIPE10081 A1 ZPIP16966 2 0 1 CIRCULAR 0.162 RCP 2.9 2.9 None 0.03 6.2 6.2 None 9.8 9.8 None 11.4 11.4 None PIPE10153 A1 ZPIP10708 2.5 0 1 CIRCULAR 0.005 RCP 0.0 0.0 None 0 0.1 0.1 None 0.1 2.3 None 0.1 3.4 None PIPE10552 A1 ZPIP15773 1.5 0 1 CIRCULAR 0.010 HDPE 0.0 0.0 None 0 0.0 0.3 None 0.4 1.5 None 0.4 1.2 None PIPE10640 A1 ZPIP10982 1.5 0 1 CIRCULAR 0.085 RCP 1.3 1.3 None 0.04 2.1 2.1 None 3.2 3.2 None 3.6 3.6 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 9 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE10228 A1 ZPIP13744 1.5 0 1 CIRCULAR 0.106 RCP 1.3 1.3 None 0.04 2.3 2.3 None 3.4 3.4 None 3.8 3.9 None PIPE10419 A1 ZPIP11226 2.25 0 1 CIRCULAR 0.004 RCP 0.3 0.3 None 0.02 0.4 0.5 None 0.6 0.7 None 0.7 2.2 None PIPE10518 A1 ZPIP11697 1.5 0 1 CIRCULAR 0.044 RCP 0.7 0.7 None 0.03 1.3 1.3 None 1.9 1.9 None 2.2 2.2 None PIPE10592 A1 ZPIP16611 1.5 0 1 CIRCULAR 0.464 RCP 2.0 2.0 None 0.03 3.1 3.1 None 4.5 6.9 None 5.0 7.4 None PIPE10052 A1 ZPIP10628 2 0 1 CIRCULAR 0.065 RCP 1.5 1.5 None 0.03 2.9 2.8 None 4.4 4.4 None 5.1 5.1 None PIPE10080 A1 ZPIP16965 2 0 1 CIRCULAR 0.045 RCP 1.4 1.4 None 0.03 2.6 2.6 None 3.9 3.9 None 4.4 4.4 None PIPE10162 A1 ZPIP17015 4 0 1 CIRCULAR 0.065 RCP 10.6 10.2 None 0.03 18.5 18.0 None 28.6 28.3 None 32.8 34.3 None PIPE10292 A1 ZPIP13912 1.5 0 1 CIRCULAR 0.048 RCP 0.8 0.8 None 0.03 1.3 1.3 None 1.9 1.9 None 2.2 2.2 None PIPE10474 A1 ZPIP11372 2 0 1 CIRCULAR 0.043 RCP 1.3 1.3 None 0.03 2.5 2.5 None 3.8 3.8 None 4.4 4.4 None PIPE10481 A1 ZPIP17283 2.5 0 1 CIRCULAR 0.010 RCP 0.1 0.1 None 0 0.5 0.6 None 1.6 3.1 None 3.1 3.6 None PIPE10671 A1 ZPIP17169 3 0 1 CIRCULAR 0.013 RCP 2.4 2.4 None 0.03 4.1 4.1 None 6.1 6.2 None 7.0 7.1 None PIPE10672 A1 ZPIP17170 3 0 1 CIRCULAR 0.007 RCP 1.7 1.7 None 0.03 2.9 2.9 None 4.3 4.3 None 5.0 5.0 None PIPE10396 A1 ZPIP11096 1.5 0 1 CIRCULAR 0.359 RCP 2.1 2.1 None 0.03 3.2 3.2 None 4.7 4.7 None 5.3 5.3 None PIPE10489 A1 ZPIP15204 1 0 1 CIRCULAR 0.010 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.1 None 0.0 0.3 None PIPE10551 A1 ZPIP15772 1.5 0 1 CIRCULAR 0.021 HDPE 0.1 0.2 None 0.01 0.4 0.7 None 0.8 1.5 None 0.8 1.2 None PIPE10047 A1 ZPIP13480 1.5 0 1 CIRCULAR 0.537 RCP 1.8 1.8 None 0.02 3.0 3.0 None 4.6 4.6 None 5.2 5.2 None PIPE10216 A1 ZPIP13734 1.5 0 1 CIRCULAR 0.247 RCP 0.0 0.0 None 0 0.0 0.6 None 0.0 0.9 None 0.0 3.5 None PIPE10320 A1 ZPIP10889 1.5 0 1 CIRCULAR 0.116 RCP 0.8 0.8 None 0.02 1.2 1.3 None 1.8 1.8 None 2.1 2.1 None PIPE10488 A1 ZPIP15201 2.25 0 1 CIRCULAR 0.005 RCP 0.1 0.1 None 0 0.1 0.2 None 0.2 0.3 None 0.3 1.3 None PIPE10037 A1 ZPIP10599 1.5 0 1 CIRCULAR 0.295 RCP 0.9 0.9 None 0.02 1.5 1.5 None 2.3 2.3 None 2.6 2.6 None PIPE10146 A1 ZPIP13639 1.5 0 1 CIRCULAR 0.060 RCP 0.0 0.0 None 0 0.0 0.0 None 1.4 0.5 None 2.1 1.4 None PIPE10184 A1 ZPIP10729 1.5 0 1 CIRCULAR 0.167 RCP 0.8 0.8 None 0.02 1.3 1.3 None 1.9 1.9 None 2.2 2.2 None PIPE10664 A1 ZPIP13638 1.5 0 1 CIRCULAR 0.145 RCP 0.0 0.0 None 0 0.0 0.0 None 0.7 0.2 None 1.3 2.2 None CULV10036 A1 ZCUL002S 10 11 5 RECT_CLOSED 0.002 RCP 131.4 129.6 None 0.02 220.6 195.7 None 328.8 269.7 None 376.6 301.4 None PIPE10333 A1 ZPIP10951 1.5 0 1 CIRCULAR 0.245 RCP 0.0 0.0 None 0 0.0 0.5 None 0.0 0.5 None 0.3 2.3 None CULV10012 A1 ZCUL002J 10 11 5 RECT_CLOSED 0.002 RCP 123.2 121.3 None 0.02 205.2 174.2 None 302.0 233.8 None 343.4 256.3 None PIPE10472 A1 ZPIP14920 2 0 1 CIRCULAR 0.277 RCP 1.4 1.5 None 0.01 2.7 2.7 None 4.2 4.2 None 4.8 4.8 None CULV10011 A1 ZCUL002I 10 11 5 RECT_CLOSED 0.006 RCP 133.7 132.2 None 0.01 225.5 205.1 None 338.2 287.4 None 389.5 324.8 None PIPE10482 A1 ZPIP17284 2 0 1 CIRCULAR 0.015 RCP 0.0 0.0 None 0 0.1 0.1 None 0.3 1.4 None 0.5 0.9 None CULV10027 A1 ZCUL002Q 10 11 5 RECT_CLOSED 0.005 RCP 121.5 119.7 None 0.01 203.3 174.9 None 301.0 234.3 None 342.9 258.4 None PIPE10598 A1 ZPIP16625 3 0 1 CIRCULAR 0.110 RCP 2.3 2.3 None 0.01 3.6 3.6 None 5.2 5.2 None 5.9 5.9 None CULV10038 A1 ZCUL002R 10 11 5 RECT_CLOSED 0.006 RCP 120.5 118.9 None 0.01 202.4 175.7 None 300.9 236.1 None 343.3 261.0 None CULV10039 A1 ZCUL002R 10 11 5 RECT_CLOSED 0.006 RCP 120.2 118.5 None 0.01 202.0 175.7 None 300.6 236.4 None 343.1 261.4 None DTCH10046 A1 0 0 1 IRREGULAR 0.014 Concrete 173.4 164.5 None 0.01 343.4 312.2 None 524.8 476.9 None 600.8 537.2 None DTCH10051 A1 0 0 1 IRREGULAR 0.009 Concrete 131.4 123.7 None 0.01 252.3 221.3 None 378.5 323.1 None 422.1 349.7 None DTCH10052 A1 0 0 1 IRREGULAR 0.009 Concrete 129.5 121.5 None 0.01 249.7 218.0 None 374.7 319.8 None 418.3 347.3 None DTCH10053 A1 0 0 1 IRREGULAR 0.008 Concrete 129.6 121.5 None 0.01 248.0 216.1 None 370.7 316.6 None 414.1 343.8 None PIPE10229 A1 ZPIP13745 1.5 0 1 CIRCULAR 0.074 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.7 None PIPE10298 A1 ZPIP13915 1.5 0 1 CIRCULAR 0.469 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.9 None 0.0 1.1 None PIPE10421 A1 ZPIP14647 1.5 0 1 CIRCULAR 0.020 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.2 None PIPE10422 A1 ZPIP14649 2 0 1 CIRCULAR 0.002 PVC 0.1 0.1 None 0.01 0.1 0.1 None 0.1 0.1 None 0.1 0.2 None PIPE10606 A1 ZPIP17886 4 10 1 TRAPEZOIDAL 0.078 RCP 27.0 26.9 None 0.01 47.9 47.8 None 72.9 72.1 None 84.1 82.7 None PIPE10649 A1 ZPIP10895 1.5 0 1 CIRCULAR 0.008 RCP 0.0 0.0 None 0 0.0 0.1 None 0.1 0.2 None 0.2 0.2 None CULV10037 A1 ZCUL002S 10 11 5 RECT_CLOSED 0.014 RCP 138.1 136.3 None 0.01 231.4 208.5 None 345.9 293.0 None 397.6 330.2 None DTCH10045 A1 0 0 1 IRREGULAR 0.030 Concrete 173.5 164.6 None 0.01 343.5 312.4 None 524.9 477.1 None 601.0 537.4 None DTCH10047 A1 0 0 1 IRREGULAR 0.030 Concrete 173.3 164.4 None 0.01 343.3 312.1 None 524.6 476.7 None 600.6 537.1 None DTCH10049 A1 0 0 1 IRREGULAR 0.009 Concrete 134.6 127.4 None 0.01 257.7 227.3 None 386.3 329.1 None 429.3 353.0 None DTCH10050 A1 0 0 1 IRREGULAR 0.009 Concrete 132.8 125.4 None 0.01 254.7 224.1 None 382.0 325.9 None 425.5 351.2 None CHAN10001 A1 CH013A 0 0 1 IRREGULAR 0.010 Earthen 57.5 57.5 None 0 121.4 121.4 None 198.6 198.7 None 233.0 232.2 None CHAN10002 A1 CH013A 0 0 1 IRREGULAR 0.010 Earthen 56.5 56.5 None 0 119.0 119.0 None 194.5 194.5 None 228.4 227.8 None CHAN10003 A1 CH013A 0 0 1 IRREGULAR 0.010 Earthen 55.8 55.8 None 0.01 117.5 117.5 None 191.9 191.8 None 225.6 225.1 None CHAN10004 A1 CH013A 0 0 1 IRREGULAR 0.010 Earthen 55.0 55.0 None 0 116.1 116.1 None 187.1 187.0 Downstream 220.2 219.8 Downstream CHAN10006 A1 CH013B 0 0 1 IRREGULAR 0.010 Earthen 56.7 56.7 None 0 119.9 119.9 None 192.9 192.8 None 228.6 228.4 None CHAN10009 A1 CH013B 0 0 1 IRREGULAR 0.010 Earthen 56.3 56.3 None 0 118.6 118.5 None 191.3 191.2 None 224.4 224.2 None PIPE10100 A1 ZPIP16976 1.5 0 1 CIRCULAR 0.020 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.1 None PIPE10233 A1 ZPIP13749 1.5 0 1 CIRCULAR 0.010 CIPCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.1 0.1 None PIPE10425 A1 ZPIP11229 1.5 0 1 CIRCULAR 0.002 PVC 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.1 None CULV10016 A1 ZCUL002L 10 11 5 RECT_CLOSED 0.001 RCP 17.8 17.1 None 0 27.9 33.1 None 43.5 53.4 None 49.2 57.7 None PIPE10670 A1 ZPIP14415 1.5 0 1 CIRCULAR 0.013 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.1 None FLOW10005 A1 4 10 1 TRAPEZOIDAL 0.054 RCP 36.5 36.9 None 0.01 68.6 53.6 None 105.9 47.9 Downstream 122.2 48.5 Both Upstream and Downstream DTCH10010 A1 DD010C 0 0 1 IRREGULAR 0.038 Earthen 60.6 67.7 None 0 117.2 111.2 None 182.3 136.3 None 214.9 156.4 None DTCH10054 A1 0 0 1 IRREGULAR 0.035 Concrete 51.2 51.9 None 0 102.2 104.7 None 160.4 171.6 None 184.6 192.5 None DTCH10055 A1 0 0 1 IRREGULAR 0.011 Concrete 51.5 52.2 None 0 102.4 105.2 None 160.9 167.8 None 184.9 188.6 None DTCH10056 A1 0 0 1 IRREGULAR 0.011 Concrete 51.1 51.8 None 0 102.0 104.5 None 160.2 165.6 None 184.0 186.8 None DTCH10057 A1 0 0 1 IRREGULAR 0.011 Concrete 51.5 52.1 None 0 102.0 104.2 None 160.0 164.8 None 183.4 186.2 None DTCH10058 A1 0 0 1 IRREGULAR 0.011 Concrete 50.8 51.4 None 0 101.2 103.2 None 159.4 163.8 None 182.6 185.6 None DTCH10059 A1 0 0 1 IRREGULAR 0.011 Concrete 51.0 51.5 None 0 101.3 103.2 None 159.2 163.6 None 182.5 185.6 None DTCH10060 A1 0 0 1 IRREGULAR 0.011 Concrete 50.8 51.3 None 0 100.7 102.4 None 159.6 163.2 None 182.5 184.5 None DTCH10061 A1 0 0 1 IRREGULAR 0.035 Concrete 50.6 51.1 None 0 102.4 104.1 None 162.5 165.6 None 186.2 185.0 None CHAN10005 A1 CH013B 0 0 1 IRREGULAR 0.021 Earthen 56.6 56.6 None 0 119.6 119.6 None 192.6 192.6 Upstream 228.0 227.7 Upstream CHAN10007 A1 CH013B 0 0 1 IRREGULAR 0.010 Earthen 56.6 56.6 None 0 119.6 119.6 None 192.5 192.4 None 227.7 227.5 None CHAN10010 A1 CH013B 0 0 1 IRREGULAR 0.010 Earthen 56.4 56.4 None 0 118.7 118.6 None 191.0 191.0 None 224.5 224.3 None CHAN10011 A1 CH013B 0 0 1 IRREGULAR 0.010 Earthen 56.3 56.3 None 0 118.4 118.4 None 190.5 190.5 None 223.8 223.7 None CHAN10012 A1 CH013B 0 0 1 IRREGULAR 0.021 Earthen 56.2 56.2 None 0 118.3 118.3 None 190.4 190.4 None 223.7 223.6 None PIPE10010 A1 ZPIP12763 1.5 0 1 CIRCULAR 0.005 CIPCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10014 A1 ZPIP10245 1.5 0 1 CIRCULAR 0.018 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 10 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE10025 A1 ZPIP13367 1.5 0 1 CIRCULAR 0.037 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10026 A1 ZPIP16936 1.5 0 1 CIRCULAR 0.022 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10027 A1 ZPIP10585 1.5 0 1 CIRCULAR 0.022 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10053 A1 ZPIP10629 1.5 0 1 CIRCULAR 0.007 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10056 A1 ZPIP13505 1.5 0 1 CIRCULAR 0.324 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10059 A1 ZPIP10633 2 0 1 CIRCULAR 0.070 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10061 A1 ZPIP13511 1.5 0 1 CIRCULAR 0.015 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10063 A1 ZPIP10635 2 0 1 CIRCULAR 0.035 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10095 A1 ZPIP13551 1.5 0 1 CIRCULAR 0.173 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10097 A1 ZPIP13553 2 0 1 CIRCULAR 0.025 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10101 A1 ZPIP10657 1.5 0 1 CIRCULAR 0.020 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10104 A1 ZPIP13557 1.5 0 1 CIRCULAR 0.049 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10144 A1 ZPIP13629 2 0 1 CIRCULAR 0.047 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 Downstream PIPE10170 A1 ZPIP17017 1.5 0 1 CIRCULAR 0.117 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10171 A1 ZPIP17018 1.5 0 1 CIRCULAR 0.022 CIPCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10172 A1 ZPIP17019 1.5 0 1 CIRCULAR 0.025 CIPCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10189 A1 ZPIP13711 1.5 0 1 CIRCULAR 0.117 CIPCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10190 A1 ZPIP13712 1.5 0 1 CIRCULAR 0.242 CIPCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10191 A1 ZPIP13713 1.5 0 1 CIRCULAR 0.182 CIPCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10193 A1 ZPIP10744 1.5 0 1 CIRCULAR 0.063 CIPCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10257 A1 ZPIP10795 1.5 0 1 CIRCULAR 0.057 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10259 A1 ZPIP13808 1.5 0 1 CIRCULAR 0.010 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10262 A1 ZPIP13845 1.5 0 1 CIRCULAR 0.036 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10263 A1 ZPIP13861 1.5 0 1 CIRCULAR 0.134 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10267 A1 ZPIP13865 1.5 0 1 CIRCULAR 0.033 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10272 A1 ZPIP10828 1.5 0 1 CIRCULAR 0.017 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.1 None 0.0 0.0 None PIPE10275 A1 ZPIP13879 3 0 1 CIRCULAR 0.023 RCP 0.0 0.0 None 0 0.0 0.1 None 0.2 0.2 None 0.2 0.2 None PIPE10279 A1 ZPIP13884 1.5 0 1 CIRCULAR 0.041 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10294 A1 ZPIP13914 1.5 0 1 CIRCULAR 0.010 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10300 A1 ZPIP13917 2 0 1 CIRCULAR 0.025 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10305 A1 ZPIP10851 1.5 0 1 CIRCULAR 0.212 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10306 A1 ZPIP10852 1.5 0 1 CIRCULAR 0.005 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10309 A1 ZPIP13923 1.5 0 1 CIRCULAR 0.062 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10326 A1 ZPIP10897 1.5 0 1 CIRCULAR 0.042 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10327 A1 ZPIP14007 1.5 0 1 CIRCULAR 0.025 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10334 A1 ZPIP14116 1.5 0 1 CIRCULAR 0.042 RCP 0.3 0.1 None 0 0.5 0.0 None 0.3 0.0 None 0.2 0.0 None PIPE10362 A1 ZPIP14174 1.5 0 1 CIRCULAR 0.036 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10363 A1 ZPIP14175 1.5 0 1 CIRCULAR 0.031 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10380 A1 ZPIP14200 1.5 0 1 CIRCULAR 0.028 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10388 A1 ZPIP11041 1.5 0 1 CIRCULAR 0.002 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10397 A1 ZPIP11097 1.5 0 1 CIRCULAR 0.034 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10398 A1 ZPIP14412 3 0 1 CIRCULAR 0.009 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10409 A1 ZPIP11167 1.5 0 1 CIRCULAR 0.020 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10414 A1 ZPIP14640 1.5 0 1 CIRCULAR 0.010 PVC 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.1 0.0 None PIPE10420 A1 ZPIP14646 2.25 0 1 CIRCULAR 0.078 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.1 None 0.0 0.4 None PIPE10427 A1 ZPIP11290 1.5 0 1 CIRCULAR 0.062 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10432 A1 ZPIP11308 1 0 1 CIRCULAR 0.070 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10436 A1 ZPIP14804 1 0 1 CIRCULAR 0.379 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10455 A1 ZPIP16681 2 0 1 CIRCULAR 0.147 ABS 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None CULV10015 A1 ZCUL002K 10 11 5 RECT_CLOSED 0.003 RCP 9.4 9.5 None 0 15.3 15.9 None 22.8 26.5 None 26.0 28.6 None PIPE10499 A1 ZPIP11542 1.5 0 1 CIRCULAR 0.402 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10500 A1 ZPIP11543 1.5 0 1 CIRCULAR 0.160 RCP 0.0 0.0 None 0 0.0 0.0 None 0.1 0.3 None 0.2 0.2 None PIPE10506 A1 ZPIP11669 3.5 0 1 CIRCULAR 0.018 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None CULV10020 A1 ZCUL025A 12 6 3 RECT_CLOSED 0.008 RCP 4.2 4.2 None 0 7.0 7.0 None 10.3 10.4 None 11.7 11.9 None CULV10021 A1 ZCUL025C 12 6 3 RECT_CLOSED 0.008 RCP 0.0 0.0 None 0 0.0 0.0 None 0.5 0.3 None 0.5 0.3 None CULV10022 A1 ZCUL025D 12 6 3 RECT_CLOSED 0.007 RCP 4.2 4.2 None 0 6.9 7.0 None 10.2 10.3 None 11.7 11.8 None PIPE10524 A1 ZPIP15544 0 0 1 DUMMY 0.009 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10572 A1 ZPIP16080 1.5 0 1 CIRCULAR 0.054 CMP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10585 A1 ZPIP16505 0 0 1 DUMMY 0.140 RCP 8.6 8.6 None 0 13.9 14.0 None 20.5 20.7 None 23.3 23.4 None PIPE10602 A1 ZPIP17885 2 0 1 CIRCULAR 0.019 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10603 A1 ZPIP12279 2 0 1 CIRCULAR 0.019 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10604 A1 ZPIP12280 2 0 1 CIRCULAR 0.019 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10605 A1 ZPIP16632 10 10 1 RECT_OPEN 0.067 RCP 36.5 36.2 None 0 68.6 41.0 None 105.9 43.3 Both Upstream and Downstream 122.2 44.9 Both Upstream and Downstream FLOW10001 A1 ZCUL16747 0 0 1 DUMMY 0.078 RCP 27.0 26.9 None 0 47.9 47.8 None 72.9 72.1 None 84.1 82.7 Downstream PIPE10611 A1 PIP19089 2 0 1 CIRCULAR 0.111 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10612 A1 PIP19090 2 0 1 CIRCULAR 0.082 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None FLOW10002 A1 0 0 1 DUMMY 0.044 RCP 45.6 45.9 None 0 77.5 78.0 None 118.9 118.9 None 134.8 133.2 None PIPE10645 A1 ZPIP13412 1.5 0 1 CIRCULAR 0.307 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10646 A1 ZPIP13365 1.5 0 1 CIRCULAR 0.024 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.1 0.0 None PIPE10650 A1 ZPIP10645 2 0 1 CIRCULAR 0.182 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10654 A1 ZPIP16896 1.5 0 1 CIRCULAR 0.283 CIPCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None FLOW10003 A1 2 4 1 PARABOLIC 0.022 RCP 1.0 0.1 None 0 1.6 0.2 None 2.3 0.5 None 3.1 0.4 None FLOW10004 A1 0 0 1 IRREGULAR 0.054 EARTHEN 34.9 35.2 None 0 64.0 64.5 None 98.6 99.6 None 113.9 114.6 Downstream FLOW10006 A1 0 0 1 IRREGULAR 0.051 EARTHEN 25.0 18.8 None 0 45.7 38.9 None 71.0 65.2 None 81.3 75.8 None DTCH10001 A1 DD010A 0 0 1 IRREGULAR 0.019 Earthen 60.1 65.5 None 0 162.9 59.0 Upstream 165.2 60.4 Upstream 157.8 64.8 Upstream DTCH10002 A1 DD010A 0 0 1 IRREGULAR 0.019 Earthen 60.8 65.2 None 0 151.7 49.2 None 143.2 56.1 None 134.5 60.6 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 11 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
DTCH10003 A1 DD010A 0 0 1 IRREGULAR 0.027 Earthen 55.0 60.3 None 0 135.2 44.9 None 114.3 52.7 None 108.0 57.1 None DTCH10004 A1 DD010A 0 0 1 IRREGULAR 0.068 Earthen 52.1 56.0 Downstream 0 125.1 42.7 Downstream 97.1 50.8 Downstream 101.4 55.2 Downstream DTCH10005 A1 DD010B 0 0 1 IRREGULAR 0.108 Earthen 60.5 53.8 None 0 116.9 79.6 None 188.4 98.2 Upstream 231.4 103.8 Upstream DTCH10006 A1 DD010B 0 0 1 IRREGULAR 0.028 Earthen 60.3 54.2 None 0 116.7 74.7 None 182.6 84.7 None 208.5 89.0 None DTCH10007 A1 DD010B 0 0 1 IRREGULAR 0.024 Earthen 67.5 71.2 None 0 167.6 76.7 None 196.1 69.8 None 177.1 70.5 None DTCH10008 A1 DD010B 0 0 1 IRREGULAR 0.315 Earthen 59.1 65.2 Downstream 0 187.0 67.3 Downstream 193.0 64.1 Downstream 184.2 66.0 Downstream DTCH10009 A1 DD010C 0 0 1 IRREGULAR 0.133 Earthen 60.8 60.8 None 0 117.5 117.5 None 182.7 174.5 Upstream 215.4 204.8 Upstream DTCH10011 A1 DD010C 0 0 1 IRREGULAR 0.133 Earthen 60.6 54.7 Downstream 0 117.1 79.5 Downstream 182.1 105.2 Downstream 214.7 112.8 Downstream DTCH10012 A1 ZDD10011 0 0 1 IRREGULAR 0.167 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10013 A1 ZDD10011 0 0 1 IRREGULAR 0.071 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10014 A1 ZDD10011 0 0 1 IRREGULAR 0.071 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10015 A1 ZDD10011 0 0 1 IRREGULAR 0.071 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10016 A1 ZDD10011 0 0 1 IRREGULAR 0.071 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10017 A1 ZDD10011 0 0 1 IRREGULAR 0.167 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10018 A1 DD012 0 0 1 IRREGULAR 0.070 Earthen 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10019 A1 DD012 0 0 1 IRREGULAR 0.027 Earthen 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10020 A1 DD012 0 0 1 IRREGULAR 0.027 Earthen 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10021 A1 DD012 0 0 1 IRREGULAR 0.027 Earthen 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10022 A1 DD012 0 0 1 IRREGULAR 0.070 Earthen 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 2.2 None DTCH10023 A1 DD014 0 0 1 IRREGULAR 0.040 Concrete 5.5 5.5 None 0 10.8 10.8 None 17.9 17.9 None 20.7 20.7 None DTCH10024 A1 DD014 0 0 1 IRREGULAR 0.009 Concrete 5.4 5.4 None 0 10.6 10.6 None 17.0 17.0 None 19.6 19.6 None DTCH10025 A1 DD014 0 0 1 IRREGULAR 0.009 Concrete 4.8 4.8 None 0 9.6 9.6 None 10.6 10.6 None 10.9 10.9 None DTCH10026 A1 DD014 0 0 1 IRREGULAR 0.009 Concrete 4.3 4.3 None 0 7.0 7.0 None 11.9 11.9 None 14.1 14.1 None DTCH10027 A1 DD014 0 0 1 IRREGULAR 0.040 Concrete 3.4 3.4 None 0 8.4 8.4 None 13.7 13.6 Downstream 16.1 16.1 Downstream DTCH10028 A1 DD001A 0 0 1 IRREGULAR 0.134 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10029 A1 DD001A 0 0 1 IRREGULAR 0.118 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10030 A1 DD001A 0 0 1 IRREGULAR 0.350 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 4.6 Downstream 19.5 8.2 Downstream DTCH10031 A1 DD001B 0 0 1 IRREGULAR 0.113 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 4.5 None 13.0 6.5 None DTCH10032 A1 DD001B 0 0 1 IRREGULAR 0.083 Concrete 0.0 0.0 None 0 0.0 6.5 None 22.8 16.0 Downstream 43.3 16.7 Downstream DTCH10033 A1 DD011A 0 0 1 IRREGULAR 0.042 Earthen 7.1 7.1 None 0 13.1 13.1 None 20.4 20.4 None 23.5 23.5 None DTCH10034 A1 DD011A 0 0 1 IRREGULAR 0.018 Earthen 7.7 7.6 None 0 13.1 13.1 None 19.6 19.6 None 22.7 22.7 None DTCH10035 A1 DD011A 0 0 1 IRREGULAR 0.018 Earthen 7.9 7.9 None 0 13.8 13.8 None 20.3 20.3 None 22.6 22.6 None DTCH10036 A1 DD011A 0 0 1 IRREGULAR 0.018 Earthen 7.1 7.1 None 0 12.8 12.8 None 18.8 18.8 None 21.5 21.5 None DTCH10037 A1 DD011A 0 0 1 IRREGULAR 0.018 Earthen 6.4 6.4 None 0 11.8 11.8 None 18.1 18.1 None 20.9 20.9 None DTCH10038 A1 DD011A 0 0 1 IRREGULAR 0.018 Earthen 6.2 6.3 None 0 11.3 11.3 None 17.6 17.6 None 20.2 20.2 None DTCH10039 A1 DD011A 0 0 1 IRREGULAR 0.018 Earthen 6.6 6.5 None 0 11.3 11.3 None 17.6 17.6 None 20.2 20.2 None DTCH10040 A1 DD011A 0 0 1 IRREGULAR 0.018 Earthen 7.4 6.0 None 0 11.1 11.1 None 17.4 17.4 None 20.0 20.0 None DTCH10041 A1 DD011A 0 0 1 IRREGULAR 0.018 Earthen 5.2 5.5 None 0 10.7 10.7 None 16.9 16.9 None 19.4 19.4 None DTCH10042 A1 DD011A 0 0 1 IRREGULAR 0.018 Earthen 3.7 3.8 None 0 8.6 8.6 None 13.2 13.2 None 15.2 15.2 None DTCH10043 A1 DD011A 0 0 1 IRREGULAR 0.018 Earthen 3.7 3.9 None 0 8.6 8.6 None 13.2 13.2 None 15.1 15.1 None DTCH10044 A1 DD011A 0 0 1 IRREGULAR 0.042 Earthen 3.6 3.7 None 0 8.6 8.6 None 13.1 13.1 None 15.1 15.1 None DTCH10048 A1 0 0 1 IRREGULAR 0.115 Concrete 134.7 127.4 None 0 258.0 227.4 None 386.7 329.4 None 429.9 356.4 None DTCH10062 A1 0 0 1 IRREGULAR 0.410 Concrete 5.1 5.1 None 0 8.8 8.8 None 13.4 13.4 None 15.3 15.3 None DTCH10063 A1 0 0 1 IRREGULAR 0.047 Concrete 4.8 4.8 None 0 8.6 8.6 None 13.1 13.1 None 15.0 15.0 None DTCH10064 A1 0 0 1 IRREGULAR 0.107 Concrete 7.7 7.7 None 0 13.9 13.9 None 21.1 21.1 None 24.2 24.2 None DTCH10065 A1 0 0 1 IRREGULAR 0.029 Concrete 7.5 7.5 None 0 13.6 13.6 None 20.7 20.7 None 23.7 23.7 None DTCH10066 A1 0 0 1 IRREGULAR 0.029 Concrete 6.8 6.8 None 0 12.8 12.8 None 20.6 20.6 None 23.6 23.6 None DTCH10067 A1 0 0 1 IRREGULAR 0.107 Concrete 6.8 6.8 None 0 12.7 12.7 None 20.4 20.4 None 23.4 23.4 None DTCH10068 A1 0 0 1 IRREGULAR 0.172 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10069 A1 0 0 1 IRREGULAR 0.032 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10070 A1 0 0 1 IRREGULAR 0.032 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10071 A1 0 0 1 IRREGULAR 0.032 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10072 A1 0 0 1 IRREGULAR 0.032 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10073 A1 0 0 1 IRREGULAR 0.032 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10074 A1 0 0 1 IRREGULAR 0.032 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10075 A1 0 0 1 IRREGULAR 0.172 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10076 A1 0 0 1 IRREGULAR 0.084 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10077 A1 0 0 1 IRREGULAR 0.028 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10078 A1 0 0 1 IRREGULAR 0.028 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10079 A1 0 0 1 IRREGULAR 0.028 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10080 A1 0 0 1 IRREGULAR 0.028 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10081 A1 0 0 1 IRREGULAR 0.028 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10082 A1 0 0 1 IRREGULAR 0.084 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10083 A1 DD009 0 0 1 IRREGULAR 0.232 Earthen 82.8 38.2 None 0 114.6 47.5 None 136.9 54.9 None 145.3 57.8 None DTCH10084 A1 DD009 0 0 1 IRREGULAR 0.023 Earthen 82.8 38.2 None 0 114.6 47.5 None 136.9 54.9 None 145.3 57.8 None DTCH10085 A1 DD009 0 0 1 IRREGULAR 0.023 Earthen 82.8 38.2 None 0 114.6 47.5 None 136.9 54.9 None 145.3 57.8 None DTCH10086 A1 DD009 0 0 1 IRREGULAR 0.023 Earthen 82.8 38.2 None 0 114.6 47.5 None 136.9 54.9 None 145.3 57.8 None DTCH10087 A1 DD009 0 0 1 IRREGULAR 0.023 Earthen 82.8 38.2 None 0 114.6 47.5 None 136.9 54.9 None 145.3 57.8 None DTCH10088 A1 DD009 0 0 1 IRREGULAR 0.023 Earthen 82.8 38.2 None 0 114.6 47.5 None 136.9 54.9 None 145.3 57.8 None DTCH10089 A1 DD009 0 0 1 IRREGULAR 0.023 Earthen 82.8 38.2 None 0 114.6 47.5 None 136.9 54.9 None 145.3 57.8 None DTCH10090 A1 DD009 0 0 1 IRREGULAR 0.023 Earthen 82.8 38.2 None 0 114.6 47.5 None 136.9 54.9 None 145.3 57.8 None DTCH10091 A1 DD009 0 0 1 IRREGULAR 0.023 Earthen 82.8 38.2 None 0 114.6 47.5 None 136.9 54.9 None 145.3 57.8 None DTCH10092 A1 DD009 0 0 1 IRREGULAR 0.023 Earthen 82.8 38.2 None 0 114.6 47.5 None 136.9 54.9 None 145.3 57.8 None DTCH10093 A1 DD009 0 0 1 IRREGULAR 0.025 Earthen 82.8 38.2 None 0 114.6 47.5 None 136.9 54.9 None 145.3 57.8 None DTCH10094 A1 DD009 0 0 1 IRREGULAR 0.112 Earthen 82.8 38.2 None 0 114.6 47.5 None 136.9 54.9 None 145.3 57.8 None DTCH10095 A1 DD002 0 0 1 IRREGULAR 0.154 Earthen 28.7 22.0 None 0 54.0 45.2 None 86.3 76.7 None 99.4 90.0 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 12 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
DTCH10096 A1 DD002 0 0 1 IRREGULAR 0.033 Earthen 28.6 21.9 None 0 53.9 45.2 None 86.1 76.6 None 99.2 89.8 None DTCH10097 A1 DD002 0 0 1 IRREGULAR 0.036 Earthen 28.1 21.8 None 0 53.2 44.9 None 85.2 76.2 None 98.9 85.1 None DTCH10098 A1 DD002 0 0 1 IRREGULAR 0.107 Earthen 28.1 21.8 None 0 53.2 44.9 None 85.2 67.2 None 98.9 92.2 None DTCH10099 A1 DD018 0 0 1 IRREGULAR 0.054 Concrete 26.9 26.9 None 0 54.2 54.3 None 83.9 84.2 None 96.8 96.7 None DTCH10100 A1 DD018 0 0 1 IRREGULAR 0.023 Concrete 26.9 26.9 None 0 55.1 55.1 None 83.6 83.7 None 96.6 96.5 None DTCH10101 A1 DD018 0 0 1 IRREGULAR 0.023 Concrete 26.7 26.7 None 0 52.9 52.9 None 83.1 83.2 None 96.2 96.2 None DTCH10102 A1 DD018 0 0 1 IRREGULAR 0.023 Concrete 27.1 27.1 None 0 52.6 52.6 None 82.9 82.9 None 95.9 96.0 None DTCH10103 A1 DD018 0 0 1 IRREGULAR 0.023 Concrete 26.9 26.9 None 0 52.6 52.8 None 82.5 82.6 None 96.0 97.9 None DTCH10104 A1 DD018 0 0 1 IRREGULAR 0.023 Concrete 26.9 26.9 None 0 52.6 52.5 None 82.4 82.4 None 95.9 94.3 None DTCH10105 A1 DD018 0 0 1 IRREGULAR 0.023 Concrete 26.9 26.9 None 0 52.6 54.8 None 87.6 63.5 None 95.7 70.4 None DTCH10106 A1 DD018 0 0 1 IRREGULAR 0.023 Concrete 26.8 26.8 None 0 52.6 44.6 None 76.5 41.1 None 72.8 46.5 None DTCH10107 A1 DD018 0 0 1 IRREGULAR 0.023 Concrete 33.8 26.6 None 0 44.4 27.0 None 48.0 19.6 None 46.6 22.5 None DTCH10108 A1 DD018 0 0 1 IRREGULAR 0.054 Concrete 23.4 29.4 Downstream 0 52.0 26.8 Downstream 51.7 24.3 Downstream 46.6 28.2 Downstream DTCH10109 A1 DD011B 0 0 1 IRREGULAR 0.036 Earthen 16.9 16.8 None 0 35.9 35.9 None 59.9 61.3 None 70.3 69.4 None DTCH10110 A1 ZDD10005 0 0 1 IRREGULAR 0.005 Concrete 9.7 9.7 None 0 19.0 18.9 None 30.6 30.9 None 35.5 33.1 None DTCH10111 A1 ZDD10005 0 0 1 IRREGULAR 0.019 Concrete 9.8 9.7 None 0 19.1 19.0 None 30.7 31.0 None 35.6 33.2 None FLOW10007 A1 0 0 1 DUMMY 0.004 RCP 41.3 41.6 None 0 85.3 85.8 None 131.7 132.5 None 158.6 159.5 None PIPE10780 A2 ZPIP13258 1.75 0 1 CIRCULAR 0.005 RCP 26.6 26.6 None 2.5 48.0 47.5 Both Upstream and Downstream 74.5 73.4 Both Upstream and Downstream 87.2 85.5 Both Upstream and Downstream PIPE11188 A2 ZPIP17387 8 0 2 CIRCULAR 0.000 RCP 734.2 765.4 None 2.32 1428.2 1359.8 None 2315.1 1966.0 Upstream 2786.6 2351.9 Upstream PIPE11189 A2 ZPIP17388 8 0 2 CIRCULAR 0.000 RCP 680.2 759.2 None 2.31 1328.9 1316.6 None 2315.7 1793.9 Downstream 2561.1 2330.3 Both Upstream and Downstream CULV10069 A2 ZCUL010A 2 0 1 CIRCULAR 0.002 RCP 34.5 29.6 Both Upstream and Downstream 3.33 57.4 41.8 Both Upstream and Downstream 87.1 55.6 Both Upstream and Downstream 98.7 60.8 Both Upstream and Downstream CULV10107 A2 1.833 0 1 CIRCULAR 0.002 CMP 26.1 14.2 None 3.7 46.2 17.2 Upstream 81.1 20.9 Both Upstream and Downstream 92.6 22.0 Both Upstream and Downstream PIPE11162 A2 ZPIP17277 2 0 1 CIRCULAR 0.001 RCP 31.2 30.6 None 4.42 57.2 33.5 None 102.5 36.4 None 112.5 38.2 None PIPE11403 A2 ZPIP11886 1.5 0 1 CIRCULAR 0.002 RCP 13.0 13.8 None 2.95 22.7 20.0 Upstream 35.2 23.7 Both Upstream and Downstream 40.2 24.5 Both Upstream and Downstream PIPE10781 A2 ZPIP13259 2.25 0 1 CIRCULAR 0.005 RCP 31.6 31.6 None 1.5 57.0 56.4 Upstream 87.8 86.2 Upstream 102.8 100.4 Upstream PIPE11464 A2 ZPIP11362 2 0 1 CIRCULAR 0.013 RCP 122.5 44.5 None 1.72 94.7 73.5 Upstream 105.5 104.3 Both Upstream and Downstream 122.1 121.6 Both Upstream and Downstream PIPE11463 A2 ZPIP10968 2 0 1 CIRCULAR 0.014 RCP 71.8 44.5 Upstream 1.64 71.0 70.3 Both Upstream and Downstream 105.7 104.3 Both Upstream and Downstream 122.3 121.9 Both Upstream and Downstream PIPE10922 A2 ZPIP13829 1.833 0 1 CIRCULAR 0.006 CMP 26.4 18.1 None 2.31 48.3 25.1 Both Upstream and Downstream 84.4 31.7 Both Upstream and Downstream 97.3 34.7 Both Upstream and Downstream CULV10096 A2 ZPIP11996 1.5 0 2 CIRCULAR 0.005 CMP 25.8 17.2 Upstream 2.14 47.1 24.5 Both Upstream and Downstream 81.0 30.7 Both Upstream and Downstream 93.4 34.0 Both Upstream and Downstream PIPE10693 A2 ZPIP12853 2 0 1 CIRCULAR 0.022 CMP 28.1 28.4 None 1.55 47.9 43.9 Upstream 73.9 63.8 Both Upstream and Downstream 84.3 71.7 Both Upstream and Downstream PIPE11371 A2 PIP19034 3 0 1 CIRCULAR 0.003 RCP 59.0 61.2 None 1.67 96.8 96.4 None 147.3 125.0 None 167.8 141.6 None PIPE11424 A2 ZPIP17668 2 0 1 CIRCULAR 0.003 RCP 23.1 22.6 None 1.94 39.1 34.5 None 59.2 42.1 Upstream 67.4 44.7 Both Upstream and Downstream PIPE10921 A2 ZPIP13827 2 0 1 CIRCULAR 0.009 RCP 28.1 28.1 None 1.32 48.7 48.1 Upstream 72.4 71.1 Upstream 83.1 81.4 Both Upstream and Downstream CULV10047 A2 ZCUL16850 1.5 0 1 CIRCULAR 0.005 CMP 5.6 5.6 None 1.38 9.4 9.1 None 13.6 13.7 None 15.5 15.4 None CULV10108 A2 1.833 0 1 CIRCULAR 0.003 CMP 26.9 14.3 None 2.55 48.2 16.5 None 80.4 19.2 Upstream 92.7 20.2 Upstream PIPE10983 A2 ZPIP11025 2 0 2 CIRCULAR 0.006 Unknown 58.5 57.4 None 1.7 95.0 90.4 None 141.3 114.5 None 160.8 117.6 None CULV10109 A2 1.833 0 1 CIRCULAR 0.004 CMP 26.2 14.2 None 2.41 45.9 16.4 None 59.7 19.0 None 63.8 20.2 None PIPE10964 A2 ZPIP14210 4 0 1 CIRCULAR 0.001 RCP 53.5 53.0 None 1.18 99.3 102.0 None 151.6 142.2 None 174.6 151.3 None PIPE11498 A2 ZPIP17276 1.5 0 1 CIRCULAR 0.039 CMP 13.1 13.1 None 1.17 22.1 21.5 Upstream 33.3 32.0 Upstream 38.1 36.4 Upstream PIPE10677 A2 ZPIP10246 2 0 1 CIRCULAR 0.009 RCP 23.5 24.1 None 1.13 41.1 40.9 None 65.0 60.0 Both Upstream and Downstream 73.7 68.6 Both Upstream and Downstream PIPE10951 A2 ZPIP10973 1.5 0 1 CIRCULAR 0.015 ACP 15.9 15.9 None 1.25 27.5 29.0 None 41.9 35.6 Both Upstream and Downstream 47.8 40.0 Both Upstream and Downstream PIPE10939 A2 ZPIP14132 2 0 1 CIRCULAR 0.010 RCP 34.4 33.6 Downstream 1.49 58.1 45.2 Both Upstream and Downstream 88.5 63.3 Both Upstream and Downstream 100.5 70.6 Both Upstream and Downstream PIPE11132 A2 ZPIP14842 1.5 0 1 CIRCULAR 0.006 RCP 9.3 9.3 None 1.14 15.0 15.0 None 22.3 22.3 None 25.3 25.3 None PIPE11161 A2 ZPIP14921 2 0 1 CIRCULAR 0.003 RCP 27.9 27.9 None 2.4 52.4 30.4 Upstream 86.4 33.7 Upstream 102.2 35.6 Upstream PIPE10778 A2 ZPIP10356 1.5 0 1 CIRCULAR 0.035 RCP 20.2 20.3 None 1.04 37.3 36.2 Upstream 57.7 53.2 Both Upstream and Downstream 66.0 59.9 Both Upstream and Downstream PIPE11415 A2 2 0 1 CIRCULAR 0.002 HDPE 11.6 11.5 None 1.09 19.4 19.1 None 29.9 28.5 None 33.8 32.4 None CULV10114 A2 CUL032 2 0 1 CIRCULAR 0.016 RCP 30.8 30.8 Upstream 1.08 53.8 54.0 Upstream 75.4 77.4 Upstream 83.2 86.6 Upstream PIPE11311 A2 ZPIP16052 2 0 1 CIRCULAR 0.008 RCP 21.1 21.8 None 1.1 36.5 38.1 None 55.4 52.9 None 65.0 58.7 None PIPE10982 A2 ZPIP14260 2 0 1 CIRCULAR 0.005 Unknown 20.3 19.3 None 1.18 32.1 34.0 Upstream 50.3 43.1 Both Upstream and Downstream 58.0 47.7 Both Upstream and Downstream PIPE10762 A2 ZPIP12967 1.5 0 1 CIRCULAR 0.022 RCP 1.7 1.8 None 0.12 3.4 20.5 None 5.3 42.5 Both Upstream and Downstream 7.5 43.6 Both Upstream and Downstream PIPE11414 A2 1.5 0 1 CIRCULAR 0.013 RCP 11.6 11.5 None 0.96 19.4 19.4 None 29.8 28.5 None 33.8 33.4 Upstream PIPE11139 A2 ZPIP11334 1.75 0 1 CIRCULAR 0.009 RCP 15.5 15.5 None 1.06 28.4 25.8 Upstream 44.4 36.4 Upstream 50.8 40.8 Upstream PIPE11358 A2 ZPIP12238 1.5 0 1 CIRCULAR 0.015 CMP 18.2 20.3 None 2.9 129.5 19.9 None 89.9 18.6 Both Upstream and Downstream 72.6 19.4 Both Upstream and Downstream PIPE11365 A2 ZPIP16608 2 0 1 CIRCULAR 0.008 RCP 15.7 15.8 None 0.77 30.2 31.1 None 47.7 47.2 None 54.9 56.3 None PIPE11000 A2 ZPIP17143 1.5 0 1 CIRCULAR 0.023 RCP 13.4 13.4 None 0.85 24.4 24.3 None 37.7 37.6 None 42.9 42.8 Both Upstream and Downstream PIPE10747 A2 ZPIP18031 2 0 1 CIRCULAR 0.020 RCP 29.4 29.3 None 0.93 53.3 52.8 None 75.1 73.9 Upstream 81.7 82.3 Upstream PIPE10962 A2 ZPIP14205 3 0 1 CIRCULAR 0.008 RCP 53.0 53.0 None 0.88 97.9 102.5 None 152.3 152.0 Upstream 173.4 154.4 Both Upstream and Downstream PIPE11461 A2 ZPIP14148 1.5 0 1 CIRCULAR 0.005 RCP 6.6 6.6 None 0.92 10.9 10.9 None 16.4 18.0 Upstream 18.6 18.0 Both Upstream and Downstream PIPE10923 A2 ZPIP13868 1.5 0 1 CIRCULAR 0.008 RCP 5.9 9.7 None 1.06 10.1 13.8 Upstream 15.4 13.6 Both Upstream and Downstream 17.6 22.9 Both Upstream and Downstream PIPE10763 A2 ZPIP12968 1.5 0 1 CIRCULAR 0.017 RCP 1.7 1.8 None 0.13 3.4 23.1 None 5.4 34.8 Both Upstream and Downstream 7.2 34.3 Both Upstream and Downstream PIPE10792 A2 ZPIP13269 1.5 0 1 CIRCULAR 0.007 ACP 8.4 8.4 None 0.97 13.9 14.4 None 20.9 19.7 None 23.7 21.4 Upstream PIPE11356 A2 ZPIP17852 1.5 0 1 CIRCULAR 0.009 RCP 9.4 9.1 None 0.9 18.2 23.5 None 29.0 24.6 None 33.7 25.0 Upstream PIPE10698 A2 ZPIP16781 2 0 1 CIRCULAR 0.011 ACP 21.1 21.1 None 0.88 36.6 39.1 None 55.6 53.0 None 63.5 58.8 Upstream PIPE10822 A2 ZPIP13434 1.5 0 1 CIRCULAR 0.009 RCP 7.4 7.3 None 0.75 12.2 12.3 None 19.5 22.8 None 23.4 23.7 Upstream CULV10060 A2 ZCUL008 6.333 4.333 1 ARCH 0.002 CMP 113.4 106.9 None 1.19 176.9 162.9 None 264.8 197.1 None 291.2 207.1 None PIPE10842 A2 ZPIP13467 2 0 1 CIRCULAR 0.009 RCP 15.3 15.5 None 0.7 29.6 29.3 None 45.7 42.4 None 52.4 49.8 None PIPE11386 A2 ZPIP20014 1.5 0 1 CIRCULAR 0.010 RCP 5.1 5.1 None 0.47 8.1 18.6 None 28.6 22.8 None 32.4 24.0 None PIPE11499 A2 ZPIP17430 4 0 1 CIRCULAR 0.004 RCP 103.1 105.8 None 1.18 176.0 161.0 None 272.7 193.3 Upstream 314.5 200.8 Upstream PIPE11272 A2 ZPIP15887 2.5 0 1 CIRCULAR 0.013 RCP 41.7 41.7 None 0.89 70.3 72.6 None 106.4 96.6 Both Upstream and Downstream 120.4 102.8 Both Upstream and Downstream PIPE10737 A2 ZPIP10341 1.5 0 1 CIRCULAR 0.016 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 27.4 Both Upstream and Downstream 0.0 29.3 Both Upstream and Downstream PIPE10787 A2 ZPIP10505 2 0 1 CIRCULAR 0.012 RCP 44.9 38.1 None 1.55 78.6 47.3 None 115.1 50.5 Upstream 137.0 53.9 Both Upstream and Downstream PIPE10956 A2 ZPIP17106 1.5 0 1 CIRCULAR 0.010 RCP 9.4 9.1 None 0.87 18.2 21.0 None 29.1 22.5 None 33.7 22.9 Downstream PIPE11423 A2 ZPIP14156 1.5 0 1 CIRCULAR 0.006 RCP 0.0 0.4 None 0.04 0.1 5.4 None 0.1 11.3 None 0.1 18.4 Both Upstream and Downstream CULV10064 A2 ZCUL007B 2 2.917 1 ARCH 0.019 CMP 38.9 38.9 None 1.39 74.0 52.6 Both Upstream and Downstream 97.5 58.7 Both Upstream and Downstream 104.5 61.1 Both Upstream and Downstream PIPE11009 A2 ZPIP14342 1.5 0 1 CIRCULAR 0.034 RCP 0.0 0.0 None 0 7.8 7.0 None 28.0 33.4 Downstream 25.8 42.0 Both Upstream and Downstream PIPE11135 A2 ZPIP11333 1.5 0 1 CIRCULAR 0.010 RCP 5.4 5.6 None 0.54 8.5 8.8 None 12.3 21.4 None 13.8 22.4 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 13 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE11495 A2 ZPIP14151 2.5 0 1 CIRCULAR 0.005 RCP 26.8 31.1 None 1.06 46.4 50.4 None 69.1 59.4 Upstream 79.6 62.9 Upstream PIPE10692 A2 ZPIP12852 2.5 0 1 CIRCULAR 0.028 CMP 31.0 30.9 None 0.83 52.9 47.7 None 81.4 70.2 Upstream 92.9 79.2 Upstream PIPE10860 A2 ZPIP10704 2 0 1 CIRCULAR 0.020 RCP 24.8 24.7 None 0.77 40.7 42.6 None 61.0 59.9 None 69.3 67.9 Upstream PIPE11155 A2 ZPIP17275 1.5 0 1 CIRCULAR 0.016 RCP 13.4 0.5 None 0.03 21.8 28.4 Both Upstream and Downstream 18.9 28.3 Both Upstream and Downstream 22.1 28.2 Both Upstream and Downstream PIPE11346 A2 ZPIP17825 2 4 1 PARABOLIC 0.006 CMP 30.2 30.6 None 0.8 51.9 48.4 None 80.4 69.8 None 91.8 78.6 None PIPE11226 A2 ZPIP17481 1.5 0 1 CIRCULAR 0.032 RCP 11.9 11.9 None 0.63 22.4 22.3 None 33.7 33.7 None 38.8 38.3 None PIPE11456 A2 ZPIP16000 1.5 0 1 CIRCULAR 0.015 RCP 9.6 9.6 None 0.74 16.3 16.9 None 24.6 25.0 None 28.1 26.3 None PIPE11269 A2 ZPIP15785 3.5 0 1 CIRCULAR 0.004 RCP 57.1 59.0 None 0.88 93.6 92.8 None 142.5 120.7 None 162.4 136.0 None PIPE10710 A2 ZPIP10332 2 0 1 CIRCULAR 0.010 RCP 24.4 24.5 None 1.1 38.9 36.0 None 57.1 43.8 Both Upstream and Downstream 64.5 44.1 Both Upstream and Downstream PIPE11245 A2 ZPIP15555 1.5 0 1 CIRCULAR 0.036 RCP 13.2 31.4 Both Upstream and Downstream 1.57 19.5 34.6 Both Upstream and Downstream 25.2 37.9 Both Upstream and Downstream 28.6 39.8 Both Upstream and Downstream PIPE10784 A2 ZPIP13262 2.75 0 1 CIRCULAR 0.010 CIPCP 27.9 27.8 None 0.61 53.2 52.7 None 83.8 79.1 Upstream 97.9 90.2 Both Upstream and Downstream PIPE11401 A2 ZPIP11028 1.75 0 1 CIRCULAR 0.010 RCP 11.8 11.8 None 0.75 18.8 18.8 None 27.3 27.4 None 30.8 30.9 None PIPE10981 A2 ZPIP14259 2 0 1 CIRCULAR 0.005 Unknown 12.2 11.7 None 0.75 20.0 18.7 Both Upstream and Downstream 30.6 26.7 Both Upstream and Downstream 35.3 30.2 Both Upstream and Downstream PIPE10938 A2 ZPIP14131 2 0 1 CIRCULAR 0.019 RCP 34.1 29.3 Both Upstream and Downstream 0.95 57.7 40.8 Both Upstream and Downstream 88.0 54.4 Both Upstream and Downstream 99.0 59.8 Both Upstream and Downstream PIPE11182 A2 ZPIP15211 4 0 1 CIRCULAR 0.009 RCP 77.6 77.5 None 0.56 146.8 146.9 None 236.5 272.2 None 274.4 265.5 Both Upstream and Downstream PIPE11246 A2 ZPIP11713 4.5 0 1 CIRCULAR 0.013 RCP 395.1 353.8 Upstream 1.58 464.6 357.3 Upstream 669.3 402.4 Upstream 761.2 431.5 Upstream PIPE11426 A2 ZPIP11089 2 0 1 CIRCULAR 0.010 RCP 23.2 21.4 None 0.93 39.2 34.6 None 59.4 42.1 None 67.7 44.7 Both Upstream and Downstream PIPE10859 A2 ZPIP13608 1.5 0 1 CIRCULAR 0.008 PVC 6.2 6.1 None 0.67 9.8 9.8 None 14.4 15.8 Both Upstream and Downstream 16.3 17.4 Both Upstream and Downstream CULV10136 A2 3 0 1 CIRCULAR 0.006 RCP 95.2 76.3 Upstream 1.43 135.7 87.3 Upstream 164.7 97.0 Upstream 176.0 100.6 Upstream PIPE10924 A2 ZPIP17047 2 0 1 CIRCULAR 0.008 RCP 19.1 22.0 None 1.1 32.6 31.3 None 49.4 35.5 Both Upstream and Downstream 56.2 37.4 Both Upstream and Downstream PIPE11167 A2 ZPIP14944 2 0 1 CIRCULAR 0.003 RCP 7.3 7.3 None 0.55 13.8 13.7 None 21.4 21.3 None 27.0 24.7 None PIPE11268 A2 ZPIP15784 3.5 0 1 CIRCULAR 0.004 RCP 53.8 54.0 None 0.8 88.3 85.2 Upstream 133.0 111.6 Upstream 151.0 125.2 Upstream PIPE11107 A2 ZPIP14712 3 0 1 CIRCULAR 0.006 RCP 44.5 43.6 None 0.85 71.1 67.1 None 100.0 88.7 Upstream 110.4 94.1 Upstream PIPE11411 A2 ZPIP15224 2.5 0 1 CIRCULAR 0.011 RCP 36.8 38.2 None 0.9 63.2 56.5 None 96.3 76.1 None 110.1 77.6 Both Upstream and Downstream PIPE10841 A2 ZPIP13466 2.5 0 1 CIRCULAR 0.005 RCP 15.3 15.5 None 0.55 29.6 31.6 None 45.6 46.7 None 52.3 51.7 None CULV10077 A2 ZCUL006B 4 8 1 RECT_CLOSED 0.004 RCP 316.3 316.9 None 1.08 410.1 504.4 Upstream 512.0 536.4 Upstream 543.9 538.0 Upstream CULV10078 A2 ZCUL006D 4 8 1 RECT_CLOSED 0.004 RCP 323.5 315.6 None 1.08 410.1 504.4 None 512.0 536.4 None 544.0 538.0 None CULV10118 A2 ZCUL006F 4 8 1 RECT_CLOSED 0.004 RCP 320.0 309.1 None 1.05 410.1 446.6 Downstream 512.0 517.6 Both Upstream and Downstream 543.9 537.6 Both Upstream and Downstream PIPE10850 A2 ZPIP13567 2 0 1 CIRCULAR 0.008 RCP 7.3 7.3 None 0.35 13.8 19.3 None 21.2 35.9 Upstream 24.0 36.7 Upstream PIPE10940 A2 ZPIP14147 2 0 1 CIRCULAR 0.047 RCP 30.0 30.3 None 0.62 52.1 51.5 None 77.5 75.9 None 89.1 86.8 Upstream PIPE11008 A2 ZPIP14341 1.5 0 1 CIRCULAR 0.008 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.6 16.8 Both Upstream and Downstream CULV10054 A2 CUL005A 4 7 2 RECT_CLOSED 0.003 RCP 284.3 281.9 None 0.71 496.0 462.8 None 637.9 626.8 None 689.5 683.3 None PIPE11159 A2 ZPIP11366 4 0 1 CIRCULAR 0.004 RCP 87.3 81.0 None 0.85 156.5 120.5 None 233.4 160.3 None 269.0 165.2 None PIPE10918 A2 ZPIP13822 1.5 0 1 CIRCULAR 0.028 CMP 5.9 5.9 None 0.62 10.6 10.6 None 16.4 14.6 Downstream 18.7 16.4 Both Upstream and Downstream CULV10081 A2 CUL005B 4 7 2 RECT_CLOSED 0.003 RCP 284.8 282.6 None 0.71 497.2 464.1 Downstream 639.6 628.4 Downstream 691.5 685.1 Downstream PIPE11310 A2 ZPIP17632 5 0 1 CIRCULAR 0.005 RCP 59.2 59.2 None 0.32 155.6 147.1 None 291.3 282.1 None 326.8 318.3 None PIPE11425 A2 ZPIP17144 1.5 0 1 CIRCULAR 0.019 RCP 0.0 0.2 None 0.01 0.0 1.8 None 0.1 5.2 None 0.1 24.8 Downstream PIPE11146 A2 ZPIP11357 1 0 1 CIRCULAR 0.021 CSP 16.1 0.4 None 0.15 10.4 5.1 None 17.9 4.5 None 13.9 4.7 None PIPE10925 A2 ZPIP17049 1.5 0 1 CIRCULAR 0.012 RCP 6.8 6.8 None 0.59 11.2 11.2 None 16.7 17.5 None 19.0 19.2 None PIPE11005 A2 ZPIP14336 4 0 1 CIRCULAR 0.012 RCP 87.5 87.3 None 0.55 164.2 158.7 None 261.6 246.5 Both Upstream and Downstream 303.7 264.3 Both Upstream and Downstream PIPE10785 A2 ZPIP13263 4 0 1 CIRCULAR 0.004 RCP 86.2 78.1 None 0.82 154.5 118.5 None 230.1 157.0 None 266.2 159.0 None PIPE10828 A2 ZPIP13456 2 0 1 CIRCULAR 0.004 RCP 6.2 6.2 None 0.42 11.4 11.3 None 17.3 16.8 None 19.7 24.7 None CULV10052 A2 ZPIP10592 3 0 1 CIRCULAR 0.005 RCP 33.6 31.3 None 0.66 56.9 46.4 None 94.7 70.0 None 103.4 78.4 Upstream PIPE10837 A2 ZPIP13463 2.5 0 1 CIRCULAR 0.006 RCP 15.3 15.5 None 0.51 29.6 29.3 None 45.6 43.8 None 52.3 50.6 None PIPE10847 A2 ZPIP16952 2 0 1 CIRCULAR 0.010 RCP 11.9 11.9 None 0.53 20.8 20.7 None 32.0 34.3 None 36.4 36.7 None PIPE10858 A2 ZPIP13607 1.5 0 1 CIRCULAR 0.009 RCP 0.1 0.1 None 0 0.1 0.1 None 0.2 15.0 Downstream 0.6 16.7 Both Upstream and Downstream PIPE11102 A2 ZPIP17239 1.5 0 1 CIRCULAR 0.005 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 10.3 Both Upstream and Downstream 0.0 12.1 Both Upstream and Downstream PIPE10887 A2 ZPIP13698 2 0 1 CIRCULAR 0.012 RCP 5.9 12.6 None 0.51 8.6 19.1 None 11.7 40.3 None 13.0 40.4 None CULV10082 A2 CUL005C 4 7 2 RECT_CLOSED 0.003 RCP 284.3 281.9 None 0.68 496.1 462.8 Upstream 637.9 626.8 Upstream 689.6 683.3 Upstream PIPE11345 A2 ZPIP17823 2 4 1 PARABOLIC 0.005 RCP 65.3 29.1 None 0.71 71.8 56.1 None 80.1 61.2 Downstream 88.6 67.1 Downstream PIPE10786 A2 ZPIP10504 2 0 1 CIRCULAR 0.015 RCP 37.4 30.2 None 1.08 63.7 36.0 None 93.3 42.1 Downstream 112.0 45.4 Both Upstream and Downstream PIPE11289 A2 ZPIP17625 4 0 1 CIRCULAR 0.009 RCP 204.9 201.7 None 1.47 348.4 213.6 Both Upstream and Downstream 516.5 217.8 Both Upstream and Downstream 583.0 222.7 Both Upstream and Downstream PIPE11340 A2 ZPIP17669 2 0 1 CIRCULAR 0.015 RCP 17.6 17.5 None 0.62 30.9 30.7 None 47.3 45.8 Upstream 54.1 46.0 Upstream CULV10134 A2 ZPIP13436 3 0 1 CIRCULAR 0.005 RCP 32.5 31.8 None 0.68 60.0 48.6 None 96.1 73.3 None 105.1 76.1 None PIPE10779 A2 ZPIP10357 4 0 1 CIRCULAR 0.009 RCP 205.6 203.5 Upstream 1.5 351.0 215.7 Both Upstream and Downstream 518.0 217.1 Both Upstream and Downstream 584.1 220.5 Both Upstream and Downstream PIPE11256 A2 ZPIP11752 3 0 1 CIRCULAR 0.004 Unknown 29.5 29.4 None 0.66 48.3 44.7 None 71.9 78.7 None 83.0 72.1 Upstream PIPE10930 A2 ZPIP10946 2 0 1 CIRCULAR 0.019 RCP 17.1 17.2 None 0.55 30.1 30.0 None 45.7 45.2 None 52.2 50.6 None PIPE10920 A2 ZPIP13824 1.5 0 1 CIRCULAR 0.010 CMP 3.3 3.2 None 0.58 5.3 5.2 None 7.9 7.9 None 8.9 9.0 None PIPE10835 A2 ZPIP10608 1.5 0 1 CIRCULAR 0.004 RCP 3.4 3.4 None 0.48 5.8 5.8 None 8.6 8.3 None 9.7 11.2 None CULV10048 A2 ZCUL16849 1.5 0 1 CIRCULAR 0.011 CMP 4.9 4.3 None 0.72 10.4 6.4 None 12.8 8.6 None 14.3 9.5 None PIPE11093 A2 ZPIP14673 3 0 1 CIRCULAR 0.010 RCP 40.5 40.4 None 0.62 69.3 68.0 None 102.8 96.3 Upstream 114.6 103.0 Both Upstream and Downstream PIPE11255 A2 ZPIP15640 3 0 1 CIRCULAR 0.004 Unknown 28.7 28.5 None 0.64 46.9 43.0 None 69.8 73.9 Upstream 79.5 70.0 Both Upstream and Downstream PIPE11355 A2 ZPIP12228 5.5 0 1 CIRCULAR 0.008 RCP 220.2 227.6 None 0.77 373.1 366.8 None 594.5 456.3 Downstream 648.1 459.8 Both Upstream and Downstream PIPE11264 A2 ZPIP11823 3.5 0 1 CIRCULAR 0.004 RCP 37.5 38.1 None 0.63 61.9 73.0 None 94.9 91.5 Upstream 107.4 93.0 Upstream PIPE10794 A2 ZPIP10516 1.5 0 1 CIRCULAR 0.010 RCP 8.5 8.5 None 0.79 13.6 13.9 None 19.9 17.5 Both Upstream and Downstream 22.5 16.5 Both Upstream and Downstream PIPE10838 A2 ZPIP18032 2.5 0 1 CIRCULAR 0.006 RCP 16.6 16.8 None 0.52 32.1 32.5 None 49.4 48.9 None 56.7 49.9 None PIPE10932 A2 ZPIP10948 2 0 1 CIRCULAR 0.010 RCP 12.0 12.1 None 0.54 20.9 20.9 None 31.8 32.9 None 36.4 34.7 None PIPE11006 A2 ZPIP14337 1.917 1.167 2 VERT_ELLIPSE 0.005 RCP 6.1 6.0 None 0.43 11.7 11.7 None 18.4 18.3 None 21.3 21.3 None PIPE11114 A2 ZPIP17251 2 0 1 CIRCULAR 0.005 RCP 8.5 9.7 None 0.59 13.2 15.5 None 18.8 22.1 None 23.5 25.1 None PIPE11142 A2 ZPIP14850 1.5 0 1 CIRCULAR 0.005 RCP 2.0 0.8 None 0.11 2.9 1.0 None 25.1 3.6 None 32.9 11.4 None PIPE11244 A2 ZPIP15554 4.5 0 1 CIRCULAR 0.014 RCP 302.5 307.9 Both Upstream and Downstream 1.33 446.3 318.1 Both Upstream and Downstream 648.7 340.3 Both Upstream and Downstream 737.4 353.8 Both Upstream and Downstream PIPE11418 A2 ZPIP15909 3.5 0 1 CIRCULAR 0.002 RCP 21.1 21.2 None 0.53 36.3 36.3 None 56.2 55.1 None 63.7 61.0 None PIPE11459 A2 ZPIP15997 2.5 0 1 CIRCULAR 0.005 RCP 16.2 16.1 None 0.56 27.1 26.9 None 40.6 43.5 Downstream 46.2 44.0 Downstream CULV10133 A2 ZPIP10595 3 0 2 CIRCULAR 0.003 RCP 48.8 43.8 None 0.57 80.6 67.0 None 138.4 111.6 None 145.8 118.8 None CULV10119 A2 ZCUL006F 4 8 1 RECT_CLOSED 0.004 RCP 271.0 269.1 None 0.92 349.2 387.9 None 436.7 477.2 Downstream 462.8 445.5 Downstream PIPE11465 A2 ZPIP14395 2 0 1 CIRCULAR 0.069 RCP 32.6 32.6 None 0.55 55.5 55.4 None 84.2 81.5 None 96.2 90.4 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 14 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE10683 A2 ZPIP10285 1.5 0 1 CIRCULAR 0.005 RCP 0.0 0.0 None 0 0.0 0.0 None 0.1 10.1 Both Upstream and Downstream 0.1 11.1 Both Upstream and Downstream PIPE11046 A2 ZPIP11111 2.5 0 1 CIRCULAR 0.005 RCP 10.5 10.5 None 0.36 23.2 23.2 None 37.4 37.3 None 43.2 43.2 None CULV10103 A2 ZCUL006E 4 8 1 RECT_CLOSED 0.005 RCP 248.3 269.1 None 0.9 349.3 381.2 None 436.7 455.3 Upstream 462.8 445.2 Upstream PIPE11265 A2 ZPIP11824 3.5 0 1 CIRCULAR 0.004 RCP 38.1 38.2 None 0.64 63.0 65.1 Downstream 95.3 92.0 Downstream 108.0 88.2 Downstream PIPE11306 A2 ZPIP16034 5 0 1 CIRCULAR 0.005 RCP 57.2 57.3 None 0.31 142.6 142.5 None 236.8 234.9 None 277.2 270.9 None PIPE11322 A2 ZPIP16060 4.5 0 1 CIRCULAR 0.007 RCP 74.2 74.2 None 0.44 145.1 144.5 None 226.8 225.7 None 261.4 248.5 None PIPE10769 A2 ZPIP10353 4 0 1 CIRCULAR 0.011 RCP 204.9 200.4 Both Upstream and Downstream 1.3 349.3 224.3 Both Upstream and Downstream 517.7 224.5 Both Upstream and Downstream 585.1 224.9 Both Upstream and Downstream PIPE10788 A2 ZPIP10506 4 0 1 CIRCULAR 0.005 CIPCP 70.9 65.4 None 0.74 125.5 97.5 None 195.7 121.7 None 224.9 129.1 Upstream PIPE11309 A2 ZPIP17631 5 0 1 CIRCULAR 0.005 RCP 57.3 57.3 None 0.31 142.6 142.6 None 245.2 240.4 None 279.5 272.5 None PIPE11004 A2 ZPIP14335 4 0 1 CIRCULAR 0.016 RCP 89.7 89.4 None 0.49 167.5 161.9 None 266.1 249.2 None 308.6 266.1 Upstream CULV10070 A2 ZCUL010C 1.5 0 2 CIRCULAR 0.074 ACP 50.9 40.8 Upstream 0.72 80.0 56.6 Upstream 121.8 75.3 Upstream 137.2 82.7 Upstream PIPE10855 A2 ZPIP13569 1.5 0 1 CIRCULAR 0.012 RCP 5.8 5.8 None 0.51 10.0 9.9 None 15.1 15.1 None 17.2 16.5 None PIPE11237 A2 ZPIP11710 4 0 1 CIRCULAR 0.017 RCP 241.6 220.8 None 1.17 412.1 252.6 Both Upstream and Downstream 627.3 264.7 Both Upstream and Downstream 698.1 272.9 Both Upstream and Downstream PIPE11410 A2 ZPIP14144 2.5 0 1 CIRCULAR 0.011 RCP 34.6 36.3 None 0.86 59.6 53.1 Upstream 90.9 61.5 Upstream 104.0 61.0 Both Upstream and Downstream PIPE10755 A2 ZPIP12964 2 0 1 CIRCULAR 0.042 RCP 2.0 2.7 None 0.06 4.6 5.7 None 7.6 51.5 None 9.0 66.4 Upstream PIPE11150 A2 ZPIP14904 2 0 1 CIRCULAR 0.021 RCP 17.5 17.5 None 0.54 30.8 30.6 None 47.1 47.0 Both Upstream and Downstream 53.8 46.6 Both Upstream and Downstream PIPE11300 A2 ZPIP17627 2 0 1 CIRCULAR 0.011 RCP 11.5 11.6 None 0.48 21.1 21.2 None 32.2 31.4 None 36.9 34.2 None CULV10105 A2 ZCUL16820 4 8 1 RECT_CLOSED 0.005 RCP 242.0 241.3 None 0.79 346.5 330.7 None 433.5 413.2 Both Upstream and Downstream 459.6 438.4 Both Upstream and Downstream PIPE11447 A2 ZPIP17594 3 0 1 CIRCULAR 0.010 CIPCP 185.0 74.3 None 1.29 344.8 79.1 None 576.1 80.8 Upstream 621.8 82.4 Upstream PIPE10913 A2 ZPIP13760 4 0 1 CIRCULAR 0.006 HDPE 64.3 65.9 None 0.59 111.6 113.0 None 170.4 154.3 None 194.8 158.1 None PIPE11165 A2 ZPIP11370 4 0 1 CIRCULAR 0.002 RCP 44.6 43.1 None 0.68 84.9 64.2 None 130.5 82.2 None 148.9 90.5 None PIPE11236 A2 ZPIP15549 4 0 1 CIRCULAR 0.022 RCP 260.1 252.9 Downstream 1.17 442.8 277.1 Both Upstream and Downstream 673.9 295.1 Both Upstream and Downstream 760.4 306.0 Both Upstream and Downstream PIPE11083 A2 ZPIP11236 1.5 0 1 CIRCULAR 0.014 RCP 6.1 6.1 None 0.5 9.8 9.8 None 14.4 15.9 Both Upstream and Downstream 16.3 17.3 Both Upstream and Downstream PIPE11090 A2 ZPIP11238 3.5 0 1 CIRCULAR 0.009 RCP 52.8 52.7 None 0.56 93.0 90.9 None 138.2 127.6 None 153.0 133.3 None CULV10094 A2 ZCUL13276 8 0 1 CIRCULAR 0.006 RCP 268.6 253.4 None 0.35 478.8 476.5 None 740.5 741.3 Upstream 867.5 1019.7 Upstream CULV10106 A2 ZCUL16821 4 8 1 RECT_CLOSED 0.005 RCP 245.5 269.1 None 0.86 349.2 357.9 None 436.6 420.4 Both Upstream and Downstream 462.7 443.3 Both Upstream and Downstream PIPE10797 A2 ZPIP13284 2 0 1 CIRCULAR 0.022 RCP 17.1 17.1 None 0.51 27.2 27.1 None 39.8 42.9 None 44.9 47.0 None PIPE11086 A2 ZPIP17226 3 0 1 CIRCULAR 0.014 RCP 40.6 40.5 None 0.51 69.6 68.2 None 103.2 101.5 None 114.6 111.6 Upstream PIPE11088 A2 ZPIP17228 3 0 1 CIRCULAR 0.018 RCP 49.4 49.3 None 0.55 86.4 84.3 None 128.1 118.4 None 142.2 126.5 None CULV10085 A2 ZCUL12445 4 6 1 RECT_CLOSED 0.011 RCP 392.8 353.5 None 1.11 469.7 372.4 None 685.2 416.8 None 779.6 447.4 None PIPE10678 A2 ZPIP10247 2.5 0 1 CIRCULAR 0.017 RCP 25.7 25.7 None 0.49 44.5 44.4 None 70.0 68.6 Upstream 79.4 73.6 Both Upstream and Downstream PIPE11095 A2 ZPIP11256 3.5 0 1 CIRCULAR 0.005 RCP 45.3 44.2 None 0.65 72.2 67.8 None 100.9 92.3 None 111.5 95.2 None PIPE11286 A2 ZPIP17611 1.5 0 1 CIRCULAR 0.038 RCP 12.7 12.7 None 0.62 20.6 20.5 None 30.7 26.8 Upstream 34.8 28.5 Upstream CULV10132 A2 ZCUL14983D 7.5 12 2 RECT_CLOSED 0.002 RCP 571.3 607.1 None 0.35 1125.9 1192.6 None 1882.2 2155.4 None 2236.6 2436.8 None CULV10131 A2 ZCUL14983D 7.5 12 3 RECT_CLOSED 0.002 RCP 931.5 941.0 None 0.36 1687.2 1694.4 None 2726.6 2941.2 None 3118.0 3634.4 None PIPE10853 A2 ZPIP10666 1.5 0 1 CIRCULAR 0.013 RCP 5.8 5.8 None 0.48 10.0 9.9 None 15.1 15.1 None 17.2 16.5 None PIPE10900 A2 ZPIP13709 2.5 0 1 CIRCULAR 0.009 RCP 8.8 14.2 None 0.36 14.0 21.9 None 20.0 47.7 None 22.4 53.6 None PIPE10950 A2 ZPIP10972 2 0 1 CIRCULAR 0.010 ACP 12.4 12.4 None 0.55 20.6 20.6 None 31.5 28.3 Both Upstream and Downstream 35.7 30.7 Both Upstream and Downstream PIPE10952 A2 ZPIP10974 2.5 0 1 CIRCULAR 0.025 RCP 37.4 37.4 None 0.57 63.4 63.2 None 96.3 80.9 Both Upstream and Downstream 109.5 89.3 Both Upstream and Downstream CULV10116 A2 ZCUL14983D 7.5 12 2 RECT_CLOSED 0.002 RCP 607.6 639.3 None 0.37 1108.1 1225.6 None 1835.5 1810.3 None 2157.6 2390.1 None PIPE10689 A2 ZPIP12849 4 0 1 CIRCULAR 0.005 RCP 76.2 68.9 None 0.68 136.4 104.7 None 204.8 134.0 None 238.5 137.8 None PIPE10752 A2 ZPIP12960 4 0 1 CIRCULAR 0.012 RCP 138.1 139.7 None 0.9 234.3 224.3 Both Upstream and Downstream 348.1 217.6 Both Upstream and Downstream 394.2 210.6 Both Upstream and Downstream PIPE11154 A2 ZPIP17274 2 0 1 CIRCULAR 0.032 RCP 29.4 18.7 None 0.46 80.2 31.8 Both Upstream and Downstream 80.7 48.0 Both Upstream and Downstream 83.0 55.2 Both Upstream and Downstream CULV10086 A2 ZCUL13185 4 6 1 RECT_CLOSED 0.011 RCP 387.4 347.7 None 1.09 461.4 361.9 None 673.2 404.2 None 765.8 436.0 None PIPE10917 A2 ZPIP13821 1.5 0 1 CIRCULAR 0.050 CMP 5.9 5.9 None 0.47 10.6 10.6 None 16.4 15.2 Upstream 18.8 17.1 Both Upstream and Downstream PIPE10944 A2 ZPIP10969 2 0 1 CIRCULAR 0.025 RCP 18.9 18.8 None 0.53 33.4 35.0 None 51.4 43.4 Both Upstream and Downstream 59.0 48.2 Both Upstream and Downstream PIPE11087 A2 ZPIP17227 3 0 1 CIRCULAR 0.019 RCP 47.8 47.7 None 0.52 83.2 81.2 None 123.1 115.3 None 137.2 123.8 None CULV10049 A2 ZCUL004A 3 0 2 CIRCULAR 0.006 RCP 67.3 60.7 None 0.57 112.0 94.4 None 169.4 140.5 None 182.1 141.9 None PIPE10914 A2 ZPIP13761 4 0 1 CIRCULAR 0.006 HDPE 69.8 71.6 None 0.66 121.7 110.8 None 185.1 136.8 None 211.4 146.1 None PIPE11096 A2 ZPIP11257 3.5 0 1 CIRCULAR 0.007 RCP 54.5 53.4 None 0.61 85.6 81.1 None 119.5 108.7 None 132.7 116.9 None PIPE11106 A2 ZPIP14711 5.5 0 1 CIRCULAR 0.009 RCP 200.6 208.4 None 0.64 342.1 341.0 None 549.9 422.8 None 597.5 433.7 Both Upstream and Downstream PIPE11163 A2 ZPIP17278 3 0 1 CIRCULAR 0.002 RCP 31.2 30.3 None 1.06 58.4 34.3 None 99.7 38.2 None 113.5 38.3 None PIPE11274 A2 ZPIP11888 3.5 0 1 CIRCULAR 0.002 RCP 21.0 21.0 None 0.43 38.1 37.2 None 60.8 58.6 None 70.3 65.2 None PIPE10891 A2 ZPIP10738 1.5 0 1 CIRCULAR 0.069 RCP 5.8 12.3 None 0.45 8.4 18.7 None 11.4 36.7 Upstream 12.7 36.7 Upstream PIPE11120 A2 ZPIP14833 2 0 1 CIRCULAR 0.020 Unknown 16.0 16.1 None 0.5 26.0 25.5 None 38.6 38.7 Both Upstream and Downstream 43.8 43.1 Both Upstream and Downstream PIPE10696 A2 ZPIP16779 2 0 1 CIRCULAR 0.010 ACP 9.5 9.5 None 0.42 16.3 16.3 None 24.8 25.5 None 28.3 30.0 None PIPE11118 A2 ZPIP11326 3 0 1 CIRCULAR 0.005 Unknown 26.4 26.4 None 0.56 43.3 41.0 None 64.3 65.6 Both Upstream and Downstream 73.0 62.4 Both Upstream and Downstream PIPE11242 A2 ZPIP15552 4 0 1 CIRCULAR 0.019 RCP 232.5 214.7 None 1.1 397.3 243.5 Both Upstream and Downstream 597.1 253.9 Both Upstream and Downstream 676.3 258.4 Both Upstream and Downstream PIPE10823 A2 ZPIP13437 2 0 1 CIRCULAR 0.055 RCP 23.7 23.8 None 0.45 41.0 41.0 None 61.5 63.6 None 70.2 69.4 None PIPE10857 A2 ZPIP10669 4 0 1 CIRCULAR 0.020 RCP 89.6 89.4 None 0.44 167.3 161.7 None 265.7 258.0 Upstream 308.3 266.5 Both Upstream and Downstream PIPE11385 A2 ZPIP20013 1.5 0 1 CIRCULAR 0.081 RCP 6.6 6.6 None 0.22 44.0 27.8 None 50.7 39.3 None 55.0 39.3 None PIPE11037 A2 ZPIP11107 1.5 0 1 CIRCULAR 0.011 RCP 5.0 5.0 None 0.46 8.2 8.1 None 12.0 11.9 None 13.5 14.2 None PIPE11243 A2 ZPIP15553 4 0 1 CIRCULAR 0.020 RCP 237.7 221.5 None 1.09 405.1 247.7 Both Upstream and Downstream 611.5 259.1 Both Upstream and Downstream 694.5 264.3 Both Upstream and Downstream PIPE10832 A2 ZPIP16950 2.5 0 1 CIRCULAR 0.005 RCP 10.5 10.6 None 0.38 19.8 19.9 None 30.3 30.2 None 34.7 36.5 None PIPE10854 A2 ZPIP13568 1.5 0 1 CIRCULAR 0.015 RCP 5.9 5.9 None 0.46 10.0 10.0 None 15.1 15.1 None 17.1 16.5 None PIPE10937 A2 ZPIP17093 2 0 1 CIRCULAR 0.012 RCP 10.8 10.9 None 0.44 18.9 19.0 None 29.0 31.0 Upstream 33.3 31.8 Upstream PIPE11026 A2 ZPIP14420 2 0 1 CIRCULAR 0.017 CIPCP 10.6 10.7 None 0.41 18.5 18.6 None 28.2 27.8 None 32.3 33.0 None PIPE11160 A2 ZPIP11367 1.833 1.083 1 ARCH 0.009 CMP 2.9 2.9 None 0.47 4.6 4.7 None 6.9 7.0 None 7.8 8.0 None PIPE11271 A2 ZPIP15886 1.5 0 1 CIRCULAR 0.022 RCP 0.0 0.0 None 0 1.5 0.4 None 2.6 1.4 Both Upstream and Downstream 1.9 19.9 Both Upstream and Downstream PIPE10690 A2 ZPIP12850 4 0 1 CIRCULAR 0.005 RCP 71.3 64.7 None 0.65 126.2 98.6 None 190.6 125.9 None 222.0 126.9 Upstream PIPE10753 A2 ZPIP12962 3 0 1 CIRCULAR 0.040 RCP 88.7 88.9 None 0.67 144.4 142.8 None 213.1 170.0 Both Upstream and Downstream 241.6 169.4 Both Upstream and Downstream CULV10095 A2 ZCUL16044 8 0 1 CIRCULAR 0.006 RCP 253.6 253.6 None 0.35 477.6 476.5 None 741.2 741.8 Both Upstream and Downstream 867.9 919.1 Both Upstream and Downstream CULV10051 A2 ZCUL004C 3 0 2 CIRCULAR 0.006 RCP 65.1 58.7 None 0.56 107.5 89.8 None 163.7 135.2 None 176.3 133.4 None PIPE10902 A2 ZPIP17023 2.5 0 1 CIRCULAR 0.008 RCP 8.7 14.2 None 0.39 14.0 21.9 None 20.0 42.0 None 22.5 46.4 None PIPE10942 A2 ZPIP14150 3 0 1 CIRCULAR 0.013 RCP 33.6 35.2 None 0.46 50.0 106.7 None 74.1 114.1 None 84.5 96.7 None PIPE10943 A2 ZPIP14152 2 0 1 CIRCULAR 0.027 RCP 20.2 21.4 None 0.57 35.2 37.4 None 53.7 42.9 Both Upstream and Downstream 61.8 47.0 Both Upstream and Downstream

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 15 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE10980 A2 ZPIP14258 3 0 1 CIRCULAR 0.010 RCP 29.6 30.3 None 0.45 48.4 49.4 None 71.7 71.7 None 81.3 85.4 None PIPE11051 A2 ZPIP14440 2 0 1 CIRCULAR 0.011 RCP 12.7 12.8 None 0.54 22.0 21.9 None 34.1 28.8 None 39.1 30.1 None PIPE11391 A2 ZPIP14020 2.5 0 1 CIRCULAR 0.022 RCP 28.9 28.7 None 0.47 49.8 49.6 None 77.9 71.8 None 88.4 76.6 None PIPE11500 A2 ZPIP17430 4 0 1 CIRCULAR 0.013 RCP 103.2 106.4 None 0.65 176.8 158.4 None 268.5 202.3 None 313.2 204.6 None PIPE10720 A2 ZPIP10336 2.5 0 1 CIRCULAR 0.015 RCP 27.1 27.2 None 0.55 43.2 43.3 None 63.4 58.0 Downstream 71.8 62.1 Downstream PIPE11168 A2 ZPIP11380 2 0 1 CIRCULAR 0.006 RCP 6.1 6.0 None 0.35 11.8 11.7 None 21.8 18.3 None 28.4 21.4 None CULV10102 A2 ZCUL001E 4 8 3 RECT_CLOSED 0.002 RCP 215.1 244.4 None 0.42 368.1 399.7 None 611.2 643.7 None 708.7 728.8 None PIPE11412 A2 ZPIP14145 2.5 0 1 CIRCULAR 0.019 RCP 37.4 38.8 None 0.68 64.1 57.5 None 97.6 68.2 None 111.5 71.4 Both Upstream and Downstream PIPE10748 A2 ZPIP10345 2.5 0 1 CIRCULAR 0.051 RCP 58.7 58.7 None 0.63 96.8 96.1 None 143.6 112.5 None 162.6 114.4 Upstream PIPE10846 A2 ZPIP13470 2.5 0 1 CIRCULAR 0.038 RCP 34.6 34.7 None 0.44 63.5 62.0 None 97.8 90.0 None 111.6 98.9 Upstream PIPE10929 A2 ZPIP17092 2.5 0 1 CIRCULAR 0.010 RCP 17.1 17.3 None 0.43 30.3 30.1 None 46.1 41.7 None 52.6 50.5 None PIPE11105 A2 ZPIP11260 5 0 1 CIRCULAR 0.013 RCP 171.0 168.1 None 0.57 290.2 275.1 None 431.8 363.1 None 488.4 368.4 Both Upstream and Downstream PIPE11394 A2 ZPIP10902 2.5 0 1 CIRCULAR 0.022 RCP 28.7 28.6 None 0.47 49.7 49.3 None 77.7 70.0 None 88.3 75.6 None PIPE11116 A2 ZPIP14831 2 0 1 CIRCULAR 0.004 RCP 2.4 2.4 None 0.18 3.8 6.8 None 5.6 14.0 Both Upstream and Downstream 6.7 16.9 Both Upstream and Downstream CULV10074 A2 ZPIP17389 4 9 1 RECT_CLOSED 0.009 RCP 116.4 117.0 None 0.24 295.8 292.7 None 479.2 417.4 None 510.4 588.2 None PIPE10783 A2 ZPIP13261 2.75 0 1 CIRCULAR 0.026 CIPCP 26.8 26.8 None 0.36 51.3 51.3 None 81.1 77.7 Both Upstream and Downstream 94.5 89.3 Both Upstream and Downstream PIPE10831 A2 ZPIP16949 2.5 0 1 CIRCULAR 0.005 RCP 10.5 10.6 None 0.37 19.8 19.6 None 30.3 30.2 None 34.6 34.8 None PIPE10895 A2 ZPIP13707 2 0 1 CIRCULAR 0.004 HDPE 6.2 6.2 None 0.42 10.6 10.6 None 16.2 16.0 None 18.6 18.1 None PIPE10965 A2 ZPIP14211 2 0 1 CIRCULAR 0.004 RCP 5.8 5.8 None 0.39 10.3 10.3 None 15.6 15.5 None 17.8 18.3 None PIPE11483 A2 2.5 0 1 CIRCULAR 0.038 RCP 32.0 32.1 None 0.4 59.4 58.0 None 91.7 86.1 None 104.7 96.5 Downstream PIPE10686 A2 ZPIP12843 1.5 0 1 CIRCULAR 0.040 RCP 13.4 13.6 None 0.65 22.7 20.6 None 34.4 24.5 Both Upstream and Downstream 39.1 25.4 Both Upstream and Downstream PIPE10821 A2 ZPIP13433 2 0 1 CIRCULAR 0.013 RCP 0.3 0.2 None 0.01 0.8 22.6 None 1.0 32.1 None 1.4 31.7 None PIPE11320 A2 ZPIP16058 5 0 1 CIRCULAR 0.008 RCP 81.2 81.0 None 0.35 158.3 157.6 None 247.4 249.0 None 285.2 281.3 None PIPE11333 A2 ZPIP16121 8 0 1 CIRCULAR 0.017 RCP 337.5 336.9 None 0.29 674.5 673.1 None 1096.6 1091.3 None 1285.1 1423.6 None CULV10113 A2 ZCUL13787 4 0 1 CIRCULAR 0.008 RCP 90.4 88.0 None 0.69 149.4 134.9 None 289.9 149.8 Both Upstream and Downstream 303.6 154.7 Both Upstream and Downstream PIPE11422 A2 ZPIP16138 4 0 1 CIRCULAR 0.009 HDPE 88.2 88.0 None 0.63 153.8 161.2 None 254.2 166.0 Both Upstream and Downstream 277.4 168.0 Both Upstream and Downstream PIPE11131 A2 ZPIP14841 2 0 1 CIRCULAR 0.009 RCP 9.3 9.3 None 0.43 15.0 14.9 None 22.4 22.0 None 25.3 25.9 None CULV10117 A2 ZCUL14983E 7.5 12 1 RECT_CLOSED 0.005 RCP 412.0 424.4 None 0.35 703.8 685.9 None 1152.9 1133.7 None 1346.1 1470.9 None PIPE10746 A2 ZPIP10344 1.5 0 1 CIRCULAR 0.021 RCP 7.0 7.1 None 0.46 12.0 12.2 None 18.1 17.0 None 20.6 18.1 None PIPE10754 A2 ZPIP12963 3 0 1 CIRCULAR 0.044 RCP 88.7 88.9 None 0.64 144.4 142.7 None 213.0 166.5 Upstream 241.5 166.6 Upstream CULV10072 A2 ZPIP15219 4 9 1 RECT_CLOSED 0.009 RCP 131.3 133.3 None 0.28 442.2 492.4 None 503.2 572.5 None 524.0 567.3 Downstream PIPE11372 A2 PIP19078 2.5 0 1 CIRCULAR 0.019 RCP 17.1 17.3 None 0.31 30.6 30.8 None 47.4 47.9 None 54.0 67.3 None PIPE11468 A2 ZPIP14358 2 0 1 CIRCULAR 0.066 RCP 25.7 25.6 None 0.44 44.8 44.2 None 68.7 63.5 None 78.7 69.1 None PIPE10767 A2 ZPIP10351 2.5 0 1 CIRCULAR 0.052 RCP 51.4 51.4 None 0.55 84.8 84.7 None 125.9 99.9 Upstream 142.6 109.8 Both Upstream and Downstream CULV10098 A2 ZCUL007C 2 2.917 1 ARCH 0.100 CMP 43.8 44.0 None 0.69 82.8 60.5 Both Upstream and Downstream 113.3 70.3 Both Upstream and Downstream 121.8 74.6 Both Upstream and Downstream PIPE11387 A2 ZPIP20015 1.5 0 1 CIRCULAR 0.081 RCP 6.6 6.6 None 0.22 25.0 22.2 None 50.4 35.3 None 45.1 35.1 None PIPE10680 A2 ZPIP12776 2.5 0 1 CIRCULAR 0.022 RCP 25.7 25.6 None 0.42 44.6 44.3 None 70.1 71.7 None 79.5 71.0 Upstream PIPE10817 A2 ZPIP13425 2 0 1 CIRCULAR 0.005 RCP 5.3 5.3 None 0.33 9.6 9.6 None 14.5 14.0 None 16.5 18.4 None PIPE11238 A2 ZPIP11711 2.25 0 1 CIRCULAR 0.010 RCP 21.3 29.3 None 0.96 34.8 31.7 Both Upstream and Downstream 51.3 40.0 Both Upstream and Downstream 58.8 35.3 Both Upstream and Downstream PIPE11341 A2 ZPIP17753 4 0 1 CIRCULAR 0.009 HDPE 78.2 80.3 None 0.59 136.7 124.6 None 206.7 148.8 Downstream 238.6 158.0 Downstream PIPE11434 A2 ZPIP15216 8 0 2 CIRCULAR 0.010 RCP 493.0 506.7 None 0.27 992.1 1059.2 None 1670.0 1785.7 None 1936.7 2162.4 Both Upstream and Downstream PIPE10685 A2 ZPIP12842 1.5 0 1 CIRCULAR 0.041 RCP 10.1 10.1 None 0.47 17.2 15.7 None 26.1 24.3 Downstream 29.7 24.4 Both Upstream and Downstream PIPE10966 A2 ZPIP14212 2 0 1 CIRCULAR 0.005 RCP 5.7 5.9 None 0.38 10.3 10.7 None 14.9 15.7 None 18.2 17.9 None PIPE11002 A2 ZPIP11061 2 0 1 CIRCULAR 0.025 RCP 12.4 12.4 None 0.35 22.8 22.8 None 35.1 35.2 None 40.2 40.9 None PIPE11061 A2 ZPIP11117 2 0 1 CIRCULAR 0.014 RCP 10.0 10.0 None 0.37 17.3 17.4 None 26.5 25.9 None 30.2 30.8 None PIPE11098 A2 ZPIP14705 5.5 0 1 CIRCULAR 0.014 RCP 222.2 230.5 None 0.58 376.0 370.1 None 609.4 444.5 Upstream 653.8 455.3 Upstream CULV10062 A2 ZCUL003A 4 8 1 RECT_CLOSED 0.034 RCP 282.3 281.2 None 0.34 908.9 931.6 Both Upstream and Downstream 900.5 931.5 Both Upstream and Downstream 908.1 936.8 Both Upstream and Downstream CULV10083 A2 ZCUL003B 4 8 1 RECT_CLOSED 0.034 RCP 282.5 281.2 None 0.34 909.0 935.0 Both Upstream and Downstream 900.6 935.5 Both Upstream and Downstream 908.3 941.9 Both Upstream and Downstream PIPE11396 A2 ZPIP12866 3 0 1 CIRCULAR 0.004 RCP 16.6 16.6 None 0.39 28.5 28.5 None 42.6 42.8 None 48.3 48.7 None PIPE10936 A2 ZPIP14112 2.5 0 1 CIRCULAR 0.022 RCP 22.9 23.1 None 0.38 41.2 41.1 None 63.0 56.9 None 72.1 69.1 None PIPE10963 A2 ZPIP10999 3 0 1 CIRCULAR 0.039 RCP 52.9 52.9 None 0.4 97.7 101.0 None 152.0 144.0 None 174.2 150.7 Upstream PIPE11032 A2 ZPIP14425 2 0 1 CIRCULAR 0.008 RCP 9.1 9.2 None 0.46 15.9 16.0 None 25.2 21.0 None 29.1 23.1 None PIPE11369 A2 PIP19030 2 0 1 CIRCULAR 0.033 RCP 20.1 20.1 None 0.49 35.2 35.1 None 53.7 43.9 None 61.2 46.7 None DTCH10236 A2 ZCH10003 1.5 3 1 PARABOLIC 0.028 EARTHEN 8.4 2.6 None 0.34 15.5 5.7 None 20.9 8.5 None 21.0 8.6 Upstream PIPE10770 A2 ZPIP12972 2.5 0 1 CIRCULAR 0.049 RCP 50.0 50.0 None 0.55 82.5 82.3 None 122.3 102.9 Both Upstream and Downstream 138.5 102.5 Both Upstream and Downstream PIPE10844 A2 ZPIP10609 2.5 0 1 CIRCULAR 0.013 RCP 14.2 14.4 None 0.3 27.5 27.4 None 42.6 44.0 None 48.8 53.8 None PIPE10934 A2 ZPIP14110 2.5 0 1 CIRCULAR 0.013 RCP 18.7 18.9 None 0.41 33.0 32.9 None 50.2 44.6 None 57.4 52.0 None PIPE11175 A2 ZPIP15139 5 6 1 RECT_CLOSED 0.007 RCP 283.3 251.2 None 0.69 406.2 304.9 None 637.0 384.7 None 673.1 408.0 None PIPE11338 A2 ZPIP12004 3.5 0 1 CIRCULAR 0.013 HDPE 55.5 57.0 None 0.51 95.9 90.1 None 146.2 132.6 Both Upstream and Downstream 167.3 127.8 Both Upstream and Downstream PIPE10739 A2 ZPIP10343 2.5 0 1 CIRCULAR 0.051 RCP 43.5 43.5 None 0.47 72.3 72.2 None 107.5 93.0 Both Upstream and Downstream 121.9 103.0 Both Upstream and Downstream PIPE10773 A2 ZPIP12975 2.5 0 1 CIRCULAR 0.052 RCP 51.5 51.5 None 0.55 84.8 84.6 None 125.6 105.6 Both Upstream and Downstream 142.2 105.2 Both Upstream and Downstream PIPE10941 A2 ZPIP14149 2 0 1 CIRCULAR 0.006 RCP 6.6 6.6 None 0.37 10.9 10.7 None 16.5 24.5 None 18.7 20.0 Upstream PIPE11044 A2 ZPIP14436 3 0 1 CIRCULAR 0.033 RCP 33.9 34.0 None 0.28 110.1 119.9 None 149.6 135.8 None 137.1 135.0 None CULV10063 A2 ZCUL009A 4.083 2.75 1 RECT_CLOSED 0.010 RCP 72.3 72.2 None 0.64 97.3 97.2 None 119.9 119.8 Both Upstream and Downstream 125.7 125.6 Both Upstream and Downstream CULV10079 A2 ZCUL009B 4.083 2.75 1 RECT_CLOSED 0.010 RCP 72.4 72.2 None 0.64 97.4 97.2 None 119.9 119.8 Upstream 125.8 125.6 Upstream CULV10080 A2 ZCUL009C 4.083 2.75 1 RECT_CLOSED 0.010 RCP 72.3 72.2 None 0.64 97.3 97.2 Upstream 119.9 119.8 Both Upstream and Downstream 125.8 125.6 Both Upstream and Downstream PIPE11407 A2 1.5 0 1 CIRCULAR 0.003 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 1.7 None 0.0 6.9 None PIPE11446 A2 ZPIP15898 3 0 1 CIRCULAR 0.010 CIPCP 178.3 64.8 Upstream 1.12 335.5 65.3 Upstream 559.5 65.3 Both Upstream and Downstream 598.7 65.2 Both Upstream and Downstream PIPE11337 A2 ZPIP12003 3 0 1 CIRCULAR 0.009 RCP 38.2 39.5 None 0.62 65.5 58.9 None 99.8 69.7 Downstream 114.1 70.6 Both Upstream and Downstream PIPE11364 A2 ZPIP16573 1.5 0 1 CIRCULAR 0.020 RCP 4.9 4.9 None 0.33 8.3 8.4 None 12.8 12.7 None 14.6 16.4 None PIPE11390 A2 ZPIP17108 2 0 1 CIRCULAR 0.033 Concrete 10.5 10.5 None 0.36 18.6 18.7 None 28.6 28.6 None 32.6 32.9 None PIPE10750 A2 ZPIP12958 2.5 0 1 CIRCULAR 0.060 RCP 58.3 58.2 None 0.58 96.2 95.5 None 142.7 109.2 None 161.8 110.5 None PIPE10927 A2 ZPIP14012 3 0 1 CIRCULAR 0.006 RCP 21.6 21.7 None 0.43 37.9 43.1 None 58.8 49.7 Both Upstream and Downstream 67.3 55.2 Both Upstream and Downstream CULV10084 A2 ZCUL003C 4 8 1 RECT_CLOSED 0.034 RCP 281.2 274.2 Upstream 0.34 901.7 926.0 Both Upstream and Downstream 880.0 910.1 Both Upstream and Downstream 866.9 894.2 Both Upstream and Downstream PIPE11301 A2 ZPIP17628 5 0 1 CIRCULAR 0.011 RCP 63.1 63.2 None 0.23 157.3 156.6 None 261.3 258.2 None 306.6 299.3 None PIPE10756 A2 ZPIP10347 2 0 1 CIRCULAR 0.057 RCP 2.0 2.7 None 0.05 4.6 5.7 None 7.6 51.5 None 9.0 58.8 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 16 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE10768 A2 ZPIP10352 3 0 1 CIRCULAR 0.025 RCP 58.0 58.0 None 0.55 95.8 95.3 None 142.1 115.0 None 161.0 115.1 None PIPE10961 A2 ZPIP10995 2 0 1 CIRCULAR 0.005 RCP 2.9 2.8 None 0.18 5.8 4.8 None 6.0 16.3 Both Upstream and Downstream 6.0 17.2 Both Upstream and Downstream PIPE11117 A2 ZPIP11325 3 0 1 CIRCULAR 0.006 Unknown 26.3 26.4 None 0.53 43.2 40.9 None 64.1 52.4 Both Upstream and Downstream 72.8 54.4 Both Upstream and Downstream PIPE11240 A2 ZPIP15550 2 0 1 CIRCULAR 0.010 RCP 4.9 16.4 Upstream 0.72 8.1 21.3 Both Upstream and Downstream 15.5 31.2 Both Upstream and Downstream 19.3 24.6 Both Upstream and Downstream PIPE11283 A2 ZPIP15941 1.5 0 1 CIRCULAR 0.017 RCP 0.0 0.0 None 0 0.2 0.2 None 0.4 12.6 Both Upstream and Downstream 1.0 14.8 Both Upstream and Downstream PIPE11284 A2 ZPIP15942 1.5 0 1 CIRCULAR 0.054 RCP 0.0 0.0 None 0 0.1 0.0 None 0.1 23.3 None 0.1 26.8 None PIPE11404 A2 ZPIP14146 2.5 0 1 CIRCULAR 0.007 RCP 19.1 20.5 None 0.62 32.9 29.0 Downstream 50.8 36.4 Both Upstream and Downstream 58.1 36.0 Both Upstream and Downstream PIPE11432 A2 ZPIP11063 1.5 0 1 CIRCULAR 0.052 RCP 0.0 0.0 None 0 0.0 0.0 None 9.7 20.2 None 11.0 26.0 Both Upstream and Downstream PIPE10691 A2 ZPIP12851 1.5 0 1 CIRCULAR 0.038 RCP 12.3 12.4 None 0.61 20.6 16.3 Both Upstream and Downstream 30.5 19.9 Both Upstream and Downstream 34.7 22.0 Both Upstream and Downstream PIPE10733 A2 ZPIP12947 2 0 1 CIRCULAR 0.032 RCP 19.8 19.9 None 0.5 31.6 31.7 None 46.4 41.9 None 52.3 43.5 None PIPE10812 A2 ZPIP16933 1.5 0 1 CIRCULAR 0.059 RCP 9.2 9.2 None 0.36 16.7 16.6 None 24.9 24.8 None 28.5 27.7 None PIPE11187 A2 ZPIP11534 8 0 2 CIRCULAR 0.009 RCP 484.2 482.9 None 0.28 951.8 949.2 None 1582.9 1579.7 None 1848.1 1889.6 Both Upstream and Downstream PIPE11363 A2 ZPIP16572 3 0 1 CIRCULAR 0.012 RCP 27.4 28.0 None 0.39 44.9 45.8 None 66.6 65.1 None 75.6 78.0 None PIPE11428 A2 ZPIP10620 8 0 2 CIRCULAR 0.009 RCP 484.6 483.2 None 0.28 952.9 957.2 None 1590.6 1631.5 None 1846.7 1889.1 Both Upstream and Downstream PIPE11433 A2 ZPIP15215 8 0 2 CIRCULAR 0.010 RCP 509.4 512.4 None 0.28 1009.1 1051.9 None 1715.4 1680.5 None 1990.7 2006.1 Both Upstream and Downstream CULV10120 A2 ZCUL14983J 7.5 12 3 RECT_CLOSED 0.002 RCP 925.0 943.2 None 0.36 1692.5 1682.2 None 2673.7 2597.9 None 3018.9 2842.2 None PIPE10802 A2 ZPIP10519 2 0 1 CIRCULAR 0.038 RCP 18.4 18.4 None 0.42 29.2 30.7 None 42.8 42.2 None 48.2 47.4 Downstream PIPE11108 A2 ZPIP14713 2.5 0 1 CIRCULAR 0.076 RCP 43.4 43.5 None 0.38 77.5 75.9 None 117.9 109.8 None 134.5 120.9 None PIPE11186 A2 ZPIP11532 8 0 2 CIRCULAR 0.009 RCP 481.4 480.2 None 0.27 947.4 945.0 None 1571.2 1550.7 None 1834.2 1873.0 Downstream PIPE10702 A2 ZPIP10330 2 0 1 CIRCULAR 0.028 RCP 16.8 16.9 None 0.44 26.9 26.9 None 39.5 41.0 None 44.6 40.5 None PIPE10798 A2 ZPIP13285 2 0 1 CIRCULAR 0.041 RCP 17.2 17.2 None 0.38 27.3 27.2 None 39.9 41.3 None 45.0 48.3 None PIPE11262 A2 ZPIP15775 2.25 0 1 CIRCULAR 0.016 RCP 20.3 26.8 None 0.69 33.4 34.1 Downstream 49.4 38.6 Both Upstream and Downstream 55.9 41.2 Both Upstream and Downstream PIPE11285 A2 ZPIP17610 1.5 0 1 CIRCULAR 0.079 RCP 14.4 14.4 None 0.49 23.2 23.1 None 34.6 30.9 None 39.2 31.3 None PIPE11368 A2 PIP19029 2 0 1 CIRCULAR 0.033 RCP 17.5 17.5 None 0.42 30.8 30.7 None 47.2 42.1 None 54.0 43.8 None PIPE10897 A2 ZPIP10741 1.5 0 1 CIRCULAR 0.015 HDPE 4.7 4.7 None 0.37 7.9 7.9 None 12.0 11.9 None 13.7 13.5 None PIPE11127 A2 ZPIP11330 3 0 1 CIRCULAR 0.017 RCP 40.6 40.6 None 0.46 68.5 68.4 None 103.9 89.9 Both Upstream and Downstream 117.7 91.6 Both Upstream and Downstream CULV10121 A2 ZCUL14983J 7.5 12 3 RECT_CLOSED 0.002 RCP 920.5 938.3 None 0.36 1688.5 1671.8 None 2619.4 2639.1 None 2983.1 2759.7 None PIPE10724 A2 ZPIP12941 3 0 1 CIRCULAR 0.008 RCP 31.0 31.2 None 0.51 49.7 49.0 None 72.2 62.6 Both Upstream and Downstream 81.6 63.2 Both Upstream and Downstream CULV10087 A2 ZCUL12644B 4 6 1 RECT_CLOSED 0.026 RCP 137.0 137.2 None 0.28 499.7 484.2 None 509.6 497.7 None 503.5 518.2 None PIPE11288 A2 ZPIP11932 1.5 0 1 CIRCULAR 0.019 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 15.3 None CULV10099 A2 ZCUL12644D 4 6 1 RECT_CLOSED 0.026 RCP 136.9 137.3 None 0.28 499.8 484.2 Upstream 509.7 497.7 Upstream 503.6 518.2 Upstream PIPE11445 A2 ZPIP14253 3 0 1 CIRCULAR 0.017 RCP 185.5 74.1 None 0.86 345.1 82.2 None 589.3 86.2 None 619.0 88.7 None DTCH10233 A2 DD10102 0 0 1 IRREGULAR 0.007 Earthen 44.1 43.6 None 0.65 82.8 55.9 Upstream 113.3 65.2 Upstream 121.9 69.1 Upstream DTCH10235 A2 ZCH10092 1.5 3 1 PARABOLIC 0.050 EARTHEN 5.3 5.4 None 0.53 9.8 9.9 None 15.2 10.5 Upstream 17.5 10.6 Both Upstream and Downstream PIPE10716 A2 ZPIP12936 2 0 1 CIRCULAR 0.040 RCP 19.8 19.9 None 0.44 31.6 31.8 None 46.3 45.4 None 52.2 46.6 None PIPE10759 A2 ZPIP10350 3.5 0 1 CIRCULAR 0.049 RCP 134.1 135.8 None 0.61 226.3 224.8 None 338.1 229.7 Both Upstream and Downstream 384.2 229.5 Both Upstream and Downstream PIPE10771 A2 ZPIP12973 2.5 0 1 CIRCULAR 0.051 RCP 45.1 45.1 None 0.49 74.8 74.7 None 111.1 90.0 Both Upstream and Downstream 126.0 95.2 Both Upstream and Downstream PIPE10852 A2 ZPIP10665 2 0 1 CIRCULAR 0.008 RCP 7.3 7.3 None 0.36 12.5 12.5 None 19.0 18.9 None 21.6 21.1 None PIPE11077 A2 ZPIP14657 1.5 0 1 CIRCULAR 0.011 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 11.2 None 0.0 11.1 Both Upstream and Downstream PIPE11421 A2 ZPIP11600 4 0 1 CIRCULAR 0.020 RCP 105.4 108.5 None 0.54 180.0 161.9 None 277.9 200.3 None 321.5 207.8 None CULV10135 A2 ZPIP16940 2.5 0 1 CIRCULAR 0.014 RCP 20.1 19.6 None 0.41 41.9 37.7 None 62.3 41.5 Upstream 68.2 49.2 Both Upstream and Downstream PIPE10757 A2 ZPIP10348 3.5 0 1 CIRCULAR 0.040 RCP 100.5 101.3 None 0.5 170.6 170.2 None 255.8 205.0 None 291.2 205.2 Downstream PIPE10969 A2 ZPIP11004 7.5 0 1 CIRCULAR 0.006 RCP 267.5 276.1 None 0.45 1080.2 662.1 None 916.8 653.8 None 980.3 623.6 None PIPE11138 A2 ZPIP14849 1.25 1.75 1 ARCH 0.008 CMP 0.2 0.1 None 0.02 0.3 3.3 Downstream 0.4 4.0 Both Upstream and Downstream 0.4 5.0 Both Upstream and Downstream PIPE11325 A2 ZPIP17645 4 0 1 CIRCULAR 0.026 RCP 67.5 67.5 None 0.29 132.2 132.1 None 206.6 206.4 None 237.9 234.8 None CULV10123 A2 ZCUL14983N 7.5 12 3 RECT_CLOSED 0.002 RCP 928.7 944.2 None 0.36 1700.4 1683.7 None 2611.4 2400.0 None 2970.0 2680.5 None CULV10124 A2 ZCUL14983S 7.5 12 3 RECT_CLOSED 0.002 RCP 929.2 942.7 None 0.36 1701.0 1682.9 None 2605.4 2400.5 None 2943.2 2686.3 None CULV10125 A2 ZCUL14983S 7.5 12 3 RECT_CLOSED 0.002 RCP 930.6 943.8 None 0.36 1703.6 1685.4 None 2610.5 2411.7 None 2951.9 2691.6 None CULV10126 A2 ZCUL14983T 7.5 12 3 RECT_CLOSED 0.002 RCP 930.5 943.6 None 0.36 1703.4 1685.1 None 2610.5 2410.4 None 2952.0 2691.6 None CULV10127 A2 ZCUL14983T 7.5 12 3 RECT_CLOSED 0.002 RCP 932.7 945.0 None 0.36 1708.7 1689.4 None 2625.3 2412.5 None 2965.0 2702.6 None CULV10128 A2 ZCUL14983T 7.5 12 3 RECT_CLOSED 0.002 RCP 932.6 945.7 None 0.36 1706.9 1688.9 None 2619.0 2415.7 None 2959.5 2697.6 None CULV10129 A2 ZCUL14983N 7.5 12 3 RECT_CLOSED 0.002 RCP 928.5 943.5 None 0.36 1699.8 1682.9 None 2591.1 2389.6 None 2969.6 2680.7 None CULV10130 A2 ZCUL14983N 7.5 12 3 RECT_CLOSED 0.002 RCP 929.9 944.2 None 0.36 1702.0 1684.6 None 2605.4 2398.6 None 2943.2 2686.3 None PIPE10726 A2 ZPIP16806 3.5 0 1 CIRCULAR 0.044 RCP 103.3 104.4 None 0.49 176.0 175.4 None 264.7 205.5 Both Upstream and Downstream 301.3 213.8 Both Upstream and Downstream PIPE10810 A2 ZPIP10562 2 0 1 CIRCULAR 0.062 RCP 19.3 19.4 None 0.35 33.6 33.6 None 50.4 50.1 None 57.5 56.7 None PIPE10974 A2 ZPIP17123 4 0 1 CIRCULAR 0.005 RCP 30.7 35.7 None 0.36 49.1 57.1 None 73.4 83.8 None 82.0 99.4 None PIPE11010 A2 ZPIP17145 2 0 1 CIRCULAR 0.120 RCP 28.6 28.5 None 0.36 47.4 47.5 None 71.3 69.9 None 81.0 79.2 None CULV10073 A2 ZPIP15220 4 9 1 RECT_CLOSED 0.009 RCP 119.6 120.1 None 0.25 340.2 398.6 None 476.5 497.4 None 483.1 484.8 None PIPE11203 A2 ZPIP17455 2 0 1 CIRCULAR 0.019 RCP 11.2 11.2 None 0.36 18.9 18.6 None 28.1 28.1 Downstream 31.9 31.8 Downstream PIPE11316 A2 ZPIP11959 4 0 1 CIRCULAR 0.026 RCP 66.0 66.0 None 0.29 129.4 129.4 None 202.2 202.2 None 232.9 232.7 None PIPE11324 A2 ZPIP17644 4 0 1 CIRCULAR 0.026 RCP 66.3 66.3 None 0.29 130.1 130.0 None 203.4 203.3 None 234.3 233.7 None PIPE11374 A2 PIP16881 2.5 0 1 CIRCULAR 0.019 RCP 17.1 17.3 None 0.3 30.6 30.7 None 47.3 46.6 None 53.9 57.2 None CULV10122 A2 ZCUL14983J 7.5 12 3 RECT_CLOSED 0.002 RCP 926.5 942.5 None 0.36 1697.2 1680.4 None 2614.9 2470.7 None 2989.1 2666.6 None PIPE10801 A2 ZPIP10518 2 0 1 CIRCULAR 0.042 RCP 17.2 17.2 None 0.37 27.3 27.4 None 40.0 39.7 None 45.1 45.9 None PIPE10829 A2 ZPIP13457 2.5 0 1 CIRCULAR 0.009 RCP 10.5 10.6 None 0.27 19.7 19.8 None 30.2 31.6 None 34.5 39.3 None PIPE10851 A2 ZPIP10664 2 0 1 CIRCULAR 0.010 RCP 7.4 7.3 None 0.32 13.8 13.8 None 21.3 22.9 Both Upstream and Downstream 24.4 22.8 Both Upstream and Downstream CULV10071 A2 ZCUL14983K 7.5 12 3 RECT_CLOSED 0.002 RCP 928.8 944.5 None 0.36 1700.7 1684.1 None 2624.3 2453.2 None 2988.4 2651.8 None PIPE11233 A2 ZPIP15507 5 0 1 CIRCULAR 0.015 RCP 68.2 68.3 None 0.21 170.5 169.8 None 280.2 278.7 None 329.6 320.9 None PIPE10805 A2 ZPIP13290 2 0 1 CIRCULAR 0.044 RCP 19.8 19.9 None 0.42 31.5 31.6 None 46.2 46.9 None 52.1 47.0 None PIPE10864 A2 ZPIP13654 4 0 1 CIRCULAR 0.005 RCP 30.5 35.5 None 0.35 50.7 58.2 None 74.8 84.9 None 85.3 99.1 None PIPE11441 A2 1.5 0 1 CIRCULAR 0.018 CMP 3.6 3.5 None 0.46 5.9 5.6 None 8.8 7.5 None 10.0 7.5 None PIPE10740 A2 ZPIP12951 3 0 1 CIRCULAR 0.032 RCP 58.0 58.2 None 0.49 95.7 95.5 None 142.0 116.2 None 160.9 116.3 None PIPE10760 A2 ZPIP12965 3.5 0 1 CIRCULAR 0.049 RCP 136.1 137.9 None 0.62 230.4 220.1 None 343.9 221.5 Both Upstream and Downstream 389.5 220.0 Both Upstream and Downstream CULV10058 A2 ZPIP14435 4 9 1 RECT_CLOSED 0.009 RCP 119.3 119.8 None 0.25 320.2 318.6 None 460.7 426.6 None 469.0 466.2 None PIPE11195 A2 ZPIP15226 5 0 1 CIRCULAR 0.016 RCP 69.4 69.5 None 0.21 173.6 172.8 None 285.0 283.6 None 335.5 326.3 None PIPE11231 A2 ZPIP15505 5 0 1 CIRCULAR 0.016 RCP 69.3 69.3 None 0.21 173.1 172.4 None 284.2 283.3 None 335.0 325.8 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 17 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE11241 A2 ZPIP15551 1.5 0 1 CIRCULAR 0.011 RCP 0.0 12.1 Both Upstream and Downstream 1.09 0.9 11.4 Both Upstream and Downstream 1.7 21.6 Both Upstream and Downstream 2.4 10.8 Both Upstream and Downstream PIPE11339 A2 ZPIP16137 3.5 0 1 CIRCULAR 0.013 HDPE 55.4 56.9 None 0.5 95.7 91.4 None 146.6 104.6 Upstream 167.8 110.9 Upstream PIPE10758 A2 ZPIP10349 3.5 0 1 CIRCULAR 0.041 RCP 100.5 101.3 None 0.5 170.7 170.5 None 256.8 195.6 Downstream 292.3 196.5 Both Upstream and Downstream PIPE11232 A2 ZPIP15506 5 0 1 CIRCULAR 0.016 RCP 68.2 68.3 None 0.21 170.5 169.8 None 280.4 278.7 None 329.9 321.0 None PIPE11298 A2 ZPIP16028 5 0 1 CIRCULAR 0.015 RCP 66.2 66.3 None 0.21 165.3 164.9 None 272.1 270.8 None 320.0 312.4 None PIPE11486 A2 1 0 1 CIRCULAR 0.108 RCP 14.0 12.5 None 0.82 21.9 14.2 None 32.3 14.4 None 37.0 11.4 Downstream PIPE10826 A2 ZPIP16659 1.5 0 1 CIRCULAR 0.005 RCP 0.0 0.0 None 0 0.1 0.0 None 0.1 0.3 None 0.1 7.5 None PIPE11014 A2 ZPIP11066 2 0 1 CIRCULAR 0.021 RCP 10.4 10.4 None 0.32 18.3 18.3 None 27.9 27.8 None 31.9 31.8 Downstream CULV10089 A2 ZCUL11830 3 5 1 RECT_CLOSED 0.019 RCP 55.2 59.9 None 0.27 144.9 100.6 None 158.6 217.1 None 166.9 215.6 Downstream PIPE10856 A2 ZPIP10668 4 0 1 CIRCULAR 0.041 RCP 87.7 87.4 None 0.3 164.5 159.2 None 262.1 268.2 Downstream 303.8 275.5 Both Upstream and Downstream PIPE10863 A2 ZPIP13653 6 0 1 CIRCULAR 0.007 RCP 72.2 73.0 None 0.21 177.2 176.1 None 290.6 288.9 None 341.9 332.6 None CULV10075 A2 CUL14989A 3 4 4 RECT_CLOSED 0.015 RCP 257.8 264.2 None 0.43 636.3 573.8 None 647.5 556.4 None 734.9 581.0 None PIPE11400 A2 ZPIP11027 2 0 1 CIRCULAR 0.020 RCP 11.8 11.8 None 0.37 18.7 18.8 None 27.3 27.4 None 30.8 30.8 None PIPE10830 A2 ZPIP16948 2.5 0 1 CIRCULAR 0.007 RCP 9.6 9.7 None 0.27 18.0 18.1 None 27.6 27.6 None 31.5 33.3 None PIPE11057 A2 ZPIP14445 2 0 1 CIRCULAR 0.020 CIPCP 9.0 9.0 None 0.33 15.1 15.2 None 22.9 22.9 None 26.1 26.0 None PIPE11388 A2 PIP20028 3 0 1 CIRCULAR 0.002 RCP 9.8 9.7 None 0.35 15.5 15.7 None 81.6 22.4 None 92.1 26.4 None PIPE11475 A2 ZPIP14155 2 0 1 CIRCULAR 0.018 RCP 10.5 10.6 None 0.35 16.9 17.0 None 25.2 25.1 None 28.5 28.3 None PIPE10986 A2 ZPIP14272 2.5 0 1 CIRCULAR 0.010 RCP 13.4 13.4 None 0.32 22.6 22.6 None 34.0 34.0 None 38.8 38.7 None PIPE11015 A2 ZPIP11067 2 0 1 CIRCULAR 0.023 RCP 10.4 10.4 None 0.3 18.2 18.2 None 27.8 27.8 None 31.8 31.7 None PIPE11122 A2 ZPIP14835 2 0 1 CIRCULAR 0.009 Unknown 4.0 4.0 None 0.18 6.4 9.8 None 9.5 21.0 Both Upstream and Downstream 10.7 20.3 Both Upstream and Downstream PIPE11266 A2 ZPIP15780 2 0 1 CIRCULAR 0.004 PVC 6.7 5.0 None 0.37 10.7 7.8 None 15.6 11.2 None 15.8 12.6 None PIPE10721 A2 ZPIP10337 2 0 1 CIRCULAR 0.064 RCP 24.5 25.1 None 0.44 38.9 40.4 None 57.0 49.6 Downstream 64.3 52.8 Both Upstream and Downstream PIPE10777 A2 ZPIP10355 2 0 1 CIRCULAR 0.020 RCP 9.5 9.4 None 0.3 16.9 18.7 None 26.0 28.1 Downstream 28.8 29.4 Downstream PIPE10867 A2 ZPIP10713 3 0 1 CIRCULAR 0.033 RCP 35.4 35.4 None 0.29 63.6 62.7 None 99.2 95.4 None 114.7 111.0 None PIPE10984 A2 ZPIP11026 4 0 1 CIRCULAR 0.008 RCP 60.4 59.0 None 0.45 98.1 92.0 None 145.3 114.1 None 164.8 120.4 None PIPE11110 A2 ZPIP14779 2 0 1 CIRCULAR 0.009 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 18.6 Upstream 0.0 19.7 Both Upstream and Downstream PIPE11129 A2 ZPIP14839 2 0 1 CIRCULAR 0.023 RCP 11.7 11.7 None 0.34 18.9 18.9 None 28.3 28.1 None 32.2 32.0 None PIPE11157 A2 ZPIP14917 1.5 0 1 CIRCULAR 0.005 RCP 0.3 0.2 None 0.03 0.4 0.3 None 0.4 6.4 None 0.8 6.7 None PIPE11223 A2 ZPIP15440 2 0 1 CIRCULAR 0.077 RCP 24.5 24.5 None 0.39 39.2 39.0 None 58.0 59.8 None 65.6 57.6 None PIPE11302 A2 ZPIP17629 5 0 1 CIRCULAR 0.015 RCP 63.0 63.0 None 0.19 156.7 156.3 None 263.0 262.9 None 308.4 296.4 None PIPE11373 A2 PIP16880 2.5 0 1 CIRCULAR 0.019 RCP 17.1 17.3 None 0.31 30.5 30.7 None 47.3 47.3 None 53.9 52.1 None CULV10110 A2 ZPIP13754 3 0 2 CIRCULAR 0.011 RCP 50.2 44.5 None 0.32 85.0 68.0 None 136.9 111.7 None 154.9 126.4 None FLOW10090 A2 0 0 1 IRREGULAR 0.001 CONCRETE 0.0 1.5 None 0.09 0.0 5.0 None 0.0 11.5 None 14.9 14.9 None PIPE11171 A2 ZPIP11489 4 0 1 CIRCULAR 0.005 RCP 27.5 32.3 None 0.32 45.4 52.5 None 67.3 78.1 None 76.3 93.1 None PIPE11172 A2 ZPIP11490 7 0 1 CIRCULAR 0.006 RCP 292.5 268.5 None 0.55 442.0 318.3 None 656.1 415.7 None 691.7 445.2 None PIPE11439 A2 ZPIP12239 1.5 0 1 CIRCULAR 0.114 CMP 18.4 18.4 None 0.96 22.3 17.9 None 21.9 18.2 Both Upstream and Downstream 13.1 17.6 Both Upstream and Downstream PIPE11489 A2 ZPIP12956 3 0 1 CIRCULAR 0.058 RCP 74.6 74.9 None 0.47 122.1 121.3 None 180.4 147.5 Downstream 204.4 146.8 Both Upstream and Downstream PIPE10741 A2 ZPIP12952 3 0 1 CIRCULAR 0.045 RCP 65.4 65.6 None 0.47 107.5 107.0 None 159.3 127.8 None 180.6 126.3 Downstream PIPE11101 A2 ZPIP17238 2.5 0 1 CIRCULAR 0.116 RCP 41.7 41.7 None 0.3 70.3 70.7 None 106.4 102.4 Upstream 120.3 125.9 Both Upstream and Downstream CULV10097 A2 CUL14989B 3 4 4 RECT_CLOSED 0.017 RCP 257.9 264.0 None 0.41 654.1 582.3 None 672.0 556.8 None 735.1 580.8 None PIPE10744 A2 ZPIP12955 4 0 1 CIRCULAR 0.035 RCP 190.6 191.0 None 0.72 329.6 253.0 Both Upstream and Downstream 478.4 243.2 Both Upstream and Downstream 541.3 236.8 Both Upstream and Downstream PIPE10820 A2 ZPIP13432 2 0 1 CIRCULAR 0.007 RCP 0.3 0.1 None 0 0.9 0.7 None 1.3 10.0 None 1.5 16.7 None PIPE11185 A2 ZPIP17386 8 0 2 CIRCULAR 0.015 RCP 479.5 478.4 None 0.22 944.6 942.1 None 1566.5 1544.8 None 1828.8 1990.8 None PIPE10876 A2 ZPIP10720 4 0 1 CIRCULAR 0.005 RCP 26.2 31.0 None 0.29 43.3 50.5 None 64.3 76.7 None 72.9 92.4 None CULV10056 A2 ZPIP14238 2 6 1 RECT_CLOSED 0.016 RCP 46.3 46.6 None 0.33 83.9 78.0 None 120.5 125.1 None 136.0 125.2 None PIPE11141 A2 ZPIP11336 1.5 0 1 CIRCULAR 0.005 RCP 0.3 0.2 None 0.02 0.5 0.7 None 10.6 0.9 None 8.3 6.5 None PIPE11307 A2 ZPIP16035 1.5 0 1 CIRCULAR 0.020 RCP 4.8 4.8 None 0.32 7.7 7.7 None 11.6 11.6 None 13.2 13.1 None CULV10115 A2 ZCUL083D 7.5 12 1 RECT_CLOSED 0.009 RCP 412.1 424.6 None 0.25 703.8 686.0 None 1022.2 977.3 None 1059.8 1516.5 None PIPE10808 A2 ZPIP16926 2 0 1 CIRCULAR 0.073 RCP 18.0 18.1 None 0.3 31.3 31.3 None 46.9 46.6 None 53.5 53.0 None PIPE10862 A2 ZPIP17009 4 0 1 CIRCULAR 0.045 RCP 87.6 87.4 None 0.29 164.3 159.0 None 261.9 256.3 Both Upstream and Downstream 304.1 266.4 Both Upstream and Downstream PIPE11104 A2 ZPIP11259 5 0 1 CIRCULAR 0.013 RCP 51.5 54.8 None 0.19 97.9 98.2 None 163.4 233.0 None 183.8 258.0 Both Upstream and Downstream PIPE11303 A2 ZPIP11946 5 0 1 CIRCULAR 0.017 RCP 63.1 63.2 None 0.18 157.1 156.7 None 263.5 259.1 None 308.2 297.0 None PIPE10742 A2 ZPIP12953 4 0 1 CIRCULAR 0.039 RCP 204.0 202.2 Downstream 0.71 347.9 241.9 Both Upstream and Downstream 515.9 246.6 Both Upstream and Downstream 584.1 244.2 Both Upstream and Downstream PIPE10994 A2 ZPIP11039 2 0 1 CIRCULAR 0.036 RCP 13.8 13.8 None 0.32 22.0 22.0 None 32.5 32.5 None 36.8 36.8 None PIPE11109 A2 ZPIP11296 2 0 1 CIRCULAR 0.026 RCP 10.7 10.7 None 0.29 18.3 18.3 None 27.5 30.4 None 31.3 31.3 None PIPE10715 A2 ZPIP12935 1.5 0 1 CIRCULAR 0.041 RCP 6.2 6.2 None 0.29 9.9 9.9 None 14.6 17.6 None 16.5 18.2 None PIPE10789 A2 ZPIP10507 4 0 1 CIRCULAR 0.016 CIPCP 71.3 64.7 None 0.42 126.2 98.2 None 191.2 124.5 None 221.4 132.3 Downstream PIPE10875 A2 ZPIP13671 4 0 1 CIRCULAR 0.006 RCP 26.3 31.2 None 0.29 43.5 50.7 None 64.6 76.8 None 73.2 91.6 None PIPE11174 A2 ZPIP11492 7 0 1 CIRCULAR 0.006 RCP 285.6 260.1 None 0.51 429.2 307.5 None 641.7 402.1 None 676.6 428.1 None PIPE10761 A2 ZPIP12966 3.5 0 1 CIRCULAR 0.065 RCP 137.8 139.5 None 0.54 233.2 219.2 Downstream 348.1 220.3 Both Upstream and Downstream 394.2 216.1 Both Upstream and Downstream PIPE11124 A2 ZPIP14837 2 0 1 CIRCULAR 0.009 Unknown 4.0 4.0 None 0.19 6.3 8.3 None 9.3 17.8 Both Upstream and Downstream 10.5 17.5 Both Upstream and Downstream PIPE11177 A2 ZPIP15141 7 0 1 CIRCULAR 0.006 RCP 284.0 253.1 None 0.51 413.8 306.0 None 640.1 393.0 None 675.1 419.6 None PIPE11496 A2 ZPIP13702 6.5 0 1 CIRCULAR 0.010 RCP 116.9 117.7 None 0.22 221.8 221.3 None 381.4 380.2 None 446.1 439.0 None PIPE10723 A2 ZPIP12940 2 0 1 CIRCULAR 0.230 RCP 13.7 13.7 None 0.13 25.9 52.9 Both Upstream and Downstream 40.2 74.7 Both Upstream and Downstream 46.2 90.1 Both Upstream and Downstream PIPE11152 A2 ZPIP14906 1.25 0 1 CIRCULAR 0.012 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.4 None 0.0 5.9 None PIPE11334 A2 ZPIP16122 2 0 1 CIRCULAR 0.019 RCP 9.5 9.5 None 0.3 16.2 16.0 None 24.4 24.4 None 27.8 26.3 None PIPE11347 A2 ZPIP12197 2 4 1 PARABOLIC 0.019 RCP 42.7 27.2 None 0.34 73.8 47.0 None 75.5 61.7 Downstream 80.7 66.2 Downstream PIPE10764 A2 ZPIP12969 4 0 1 CIRCULAR 0.029 RCP 150.3 152.0 None 0.62 264.1 223.3 Both Upstream and Downstream 383.5 220.3 Both Upstream and Downstream 434.8 201.4 Both Upstream and Downstream PIPE11173 A2 ZPIP11491 7 0 1 CIRCULAR 0.007 RCP 284.8 258.0 None 0.5 422.5 306.5 None 640.5 400.1 None 675.2 426.4 None PIPE11290 A2 ZPIP17626 4 0 1 CIRCULAR 0.036 RCP 204.6 193.0 None 0.71 347.6 214.2 Both Upstream and Downstream 516.2 219.2 Both Upstream and Downstream 582.7 225.1 Both Upstream and Downstream PIPE11327 A2 ZPIP11964 3.5 0 1 CIRCULAR 0.030 RCP 39.2 39.2 None 0.22 78.0 78.0 None 121.8 121.8 None 142.1 142.1 None CULV10101 A2 ZCUL001D 4 8 3 RECT_CLOSED 0.004 RCP 209.0 246.0 None 0.28 367.4 398.9 None 610.1 642.2 None 707.4 727.1 None PIPE11466 A2 ZPIP17221 3.5 0 1 CIRCULAR 0.013 RCP 32.6 32.5 None 0.29 55.5 55.4 None 84.1 83.9 None 96.1 91.3 None PIPE10811 A2 ZPIP13413 2 0 1 CIRCULAR 0.030 RCP 10.5 10.5 None 0.27 18.8 18.8 None 28.1 28.0 None 32.1 31.4 None PIPE11147 A2 ZPIP11358 1 0 1 CIRCULAR 0.042 RCP 19.5 0.5 None 0.07 13.4 7.3 Downstream 21.8 6.5 Downstream 18.2 5.8 Downstream PIPE11361 A2 ZPIP16570 2 0 1 CIRCULAR 0.008 RCP 4.8 4.8 None 0.25 8.4 8.2 None 14.0 12.6 None 16.2 15.7 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 18 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE11474 A2 ZPIP11217 1.5 0 1 CIRCULAR 0.030 RCP 5.3 5.3 None 0.29 8.7 8.7 None 12.9 12.9 None 14.6 14.6 None PIPE11485 A2 5.5 0 1 CIRCULAR 0.009 RCP 127.9 115.5 None 0.37 212.5 177.8 None 292.9 251.0 None 308.1 247.1 Upstream PIPE10809 A2 ZPIP10561 1.5 0 1 CIRCULAR 0.005 RCP 1.8 1.9 None 0.26 3.2 3.3 None 4.8 5.0 None 5.5 5.7 None PIPE10684 A2 ZPIP12841 1.5 0 1 CIRCULAR 0.027 RCP 4.0 4.0 None 0.23 6.7 6.7 None 10.1 13.7 Upstream 11.5 13.5 Both Upstream and Downstream PIPE10997 A2 ZPIP17140 1.5 0 1 CIRCULAR 0.010 RCP 0.0 0.0 None 0 0.0 0.8 None 0.0 11.5 None 0.0 8.2 Both Upstream and Downstream PIPE11012 A2 ZPIP17147 2 0 1 CIRCULAR 0.033 RCP 10.4 10.4 None 0.25 18.2 18.2 None 27.7 27.7 None 31.7 31.8 None PIPE11033 A2 ZPIP14426 1.5 0 1 CIRCULAR 0.019 RCP 0.4 0.3 None 0.02 0.5 0.6 None 0.9 4.7 None 1.0 11.3 None PIPE11183 A2 ZPIP17384 8 0 2 CIRCULAR 0.014 RCP 413.2 413.3 None 0.19 833.7 838.4 None 1368.0 1367.6 None 1602.2 1658.2 Upstream PIPE11362 A2 ZPIP16571 3 0 1 CIRCULAR 0.013 RCP 21.3 21.3 None 0.28 34.7 34.7 None 51.5 51.5 None 58.6 59.3 None FLOW10010 A2 0 0 1 IRREGULAR 0.002 CONCRETE 5.6 8.8 None 0.29 10.0 14.6 None 15.6 21.3 None 18.2 24.0 None PIPE11018 A2 ZPIP14353 8 0 3 CIRCULAR 0.009 RCP 602.1 637.4 None 0.25 1096.4 1219.7 None 1826.1 1713.3 None 2128.1 1979.3 None PIPE11312 A2 ZPIP16053 2 0 1 CIRCULAR 0.155 RCP 25.2 25.5 None 0.29 43.0 45.1 None 64.8 61.7 None 74.7 68.3 None PIPE11416 A2 ZPIP10965 1.5 0 1 CIRCULAR 0.019 HDPE 3.8 3.8 None 0.26 6.4 6.4 None 9.9 9.9 None 11.2 11.2 None PIPE11438 A2 ZPIP15144 2 0 1 CIRCULAR 0.013 RCP 7.3 7.3 None 0.29 11.6 11.7 None 17.3 17.3 None 19.6 19.6 None PIPE10985 A2 ZPIP14261 4 0 1 CIRCULAR 0.012 RCP 60.6 59.1 None 0.37 98.3 91.9 None 145.6 113.9 None 165.5 120.4 None CULV10059 A2 ZPIP14843 2 6 1 RECT_CLOSED 0.023 RCP 48.2 49.4 None 0.29 101.9 81.7 None 131.4 131.4 None 142.1 132.3 None PIPE11261 A2 ZPIP15774 2 0 1 CIRCULAR 0.020 RCP 11.1 16.6 None 0.52 18.7 24.6 None 27.9 22.7 Both Upstream and Downstream 31.6 24.1 Both Upstream and Downstream PIPE10818 A2 ZPIP16938 2 0 1 CIRCULAR 0.044 RCP 11.8 11.8 None 0.25 21.1 21.1 None 31.6 31.4 None 36.1 35.4 None PIPE11198 A2 ZPIP11541 4 0 1 CIRCULAR 0.004 RCP 27.3 27.5 None 0.3 55.7 47.7 None 73.9 61.8 None 82.0 67.6 None PIPE11405 A2 2.5 0 1 CIRCULAR 0.019 RCP 14.5 15.5 None 0.27 25.2 24.1 None 39.0 26.8 Both Upstream and Downstream 44.5 42.3 Both Upstream and Downstream PIPE10682 A2 ZPIP10283 1.5 0 1 CIRCULAR 0.066 RCP 6.8 6.8 None 0.25 11.2 11.2 None 16.8 17.5 None 19.1 19.9 None PIPE10732 A2 ZPIP12946 1.5 0 1 CIRCULAR 0.018 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 6.1 None 0.0 10.6 Upstream PIPE10949 A2 ZPIP14159 3 0 1 CIRCULAR 0.035 RCP 40.5 40.5 None 0.32 68.4 68.1 None 103.7 90.0 Downstream 117.7 92.4 Both Upstream and Downstream PIPE11125 A2 ZPIP11328 2 0 1 CIRCULAR 0.006 Unknown 4.0 4.0 None 0.23 6.4 6.4 None 9.3 12.4 Both Upstream and Downstream 10.5 12.8 Both Upstream and Downstream PIPE11429 A2 ZPIP14157 2 0 1 CIRCULAR 0.104 RCP 26.5 25.1 None 0.34 45.0 40.3 None 68.5 50.0 None 78.0 53.5 Both Upstream and Downstream PIPE11482 A2 2 0 1 CIRCULAR 0.073 RCP 15.2 15.2 None 0.25 26.4 26.3 None 40.4 40.8 None 45.9 45.6 None PIPE10815 A2 ZPIP10589 1.5 0 1 CIRCULAR 0.010 RCP 0.9 0.9 None 0.09 1.7 1.7 None 2.6 3.4 None 3.0 7.5 None PIPE10967 A2 ZPIP17114A 5.5 0 1 CIRCULAR 0.059 RCP 265.6 272.8 None 0.33 750.7 572.8 None 773.6 573.9 None 761.3 599.9 None PIPE10998 A2 ZPIP17141 1.5 0 1 CIRCULAR 0.117 RCP 9.4 9.1 None 0.25 18.2 19.8 None 29.0 26.1 None 33.7 26.2 Both Upstream and Downstream CULV10100 A2 ZCUL001C 4 8 3 RECT_CLOSED 0.004 RCP 184.3 220.9 None 0.25 336.7 350.4 None 573.2 565.4 None 665.0 645.2 None CULV10104 A2 ZCUL16818 4 8 1 RECT_CLOSED 0.018 RCP 289.0 234.2 Upstream 0.39 371.2 321.2 Upstream 429.7 408.1 Both Upstream and Downstream 455.6 433.0 Both Upstream and Downstream PIPE10688 A2 ZPIP16778 4 0 1 CIRCULAR 0.004 RCP 26.6 26.7 None 0.3 51.2 46.9 None 72.2 59.5 None 79.6 65.1 None PIPE10697 A2 ZPIP16780 2 0 1 CIRCULAR 0.133 ACP 19.6 19.6 None 0.24 34.2 34.2 None 52.1 52.2 None 59.4 59.4 Downstream PIPE11024 A2 ZPIP11102 2.5 0 1 CIRCULAR 0.033 RCP 13.4 13.4 None 0.18 28.2 28.2 None 46.3 46.4 None 53.7 53.7 None PIPE11036 A2 ZPIP14430 1.5 0 1 CIRCULAR 0.007 RCP 1.8 1.8 None 0.21 3.0 3.0 None 4.5 4.5 None 5.0 6.3 None CULV10111 A2 5.5 0 3 CIRCULAR 0.006 RCP 171.9 203.2 Downstream 0.25 324.1 308.9 Downstream 651.0 528.5 Downstream 727.8 583.3 Downstream PIPE10790 A2 ZPIP13264 1.5 0 1 CIRCULAR 0.020 RCP 0.2 0.2 None 0.01 0.3 0.1 None 0.4 10.8 None 0.6 10.5 Upstream PIPE11222 A2 ZPIP15439 2 0 1 CIRCULAR 0.124 RCP 24.5 24.4 None 0.31 39.2 39.0 None 58.0 62.7 None 65.6 55.9 None PIPE11227 A2 ZPIP17482 1.5 0 1 CIRCULAR 0.064 RCP 6.7 6.7 None 0.25 11.0 11.0 None 16.6 16.6 None 18.8 18.8 None PIPE11239 A2 ZPIP11712 2.25 0 1 CIRCULAR 0.024 RCP 20.7 29.2 None 0.61 33.5 31.4 Both Upstream and Downstream 52.1 44.9 Both Upstream and Downstream 60.7 33.7 Both Upstream and Downstream PIPE10717 A2 ZPIP12937 3 0 1 CIRCULAR 0.015 RCP 29.5 29.6 None 0.36 47.2 47.0 None 69.0 55.1 Both Upstream and Downstream 78.1 56.3 Both Upstream and Downstream PIPE10736 A2 ZPIP12950 1.5 0 1 CIRCULAR 0.043 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 22.1 Both Upstream and Downstream 0.0 15.0 Both Upstream and Downstream PIPE10978 A2 ZPIP11024 2.5 0 1 CIRCULAR 0.012 Unknown 9.5 9.5 None 0.21 17.2 17.2 None 27.5 27.5 None 31.4 31.3 None PIPE11204 A2 ZPIP11630 2 0 1 CIRCULAR 0.028 RCP 11.0 11.1 None 0.29 18.7 19.4 None 27.9 25.4 Both Upstream and Downstream 31.6 26.0 Both Upstream and Downstream CHAN10785 A2 ZCH10096B 0 0 1 IRREGULAR 0.056 EARTHEN 89.6 87.1 None 0.4 128.4 124.9 None 170.4 148.8 None 186.5 151.9 None PIPE11039 A2 ZPIP11109 7 0 1 CIRCULAR 0.010 RCP 111.3 111.9 None 0.17 231.7 232.7 None 370.7 372.4 None 426.4 437.8 None PIPE11281 A2 ZPIP15939 5 0 1 CIRCULAR 0.034 RCP 145.6 138.6 None 0.29 256.2 226.9 None 381.6 291.4 None 445.1 324.1 None PIPE11336 A2 ZPIP12002 2 0 1 CIRCULAR 0.011 RCP 5.6 5.6 None 0.24 9.4 9.4 None 14.3 14.3 None 16.2 16.2 None PIPE11384 A2 ZPIP17114B 5.5 0 1 CIRCULAR 0.077 RCP 267.4 275.2 None 0.3 833.5 709.1 None 790.9 671.3 None 856.3 633.1 None PIPE11437 A2 ZPIP15143 5 6 1 RECT_CLOSED 0.020 RCP 282.4 250.1 None 0.42 404.8 303.5 None 635.1 383.2 None 671.1 406.1 None PIPE11097 A2 ZPIP14704 4.5 0 1 CIRCULAR 0.020 RCP 43.0 46.5 None 0.17 84.0 85.8 None 138.4 193.1 None 161.5 187.8 Both Upstream and Downstream PIPE11193 A2 ZPIP11536 7 0 1 CIRCULAR 0.010 RCP 108.4 108.9 None 0.17 226.3 227.2 None 362.1 363.5 None 417.1 427.5 None PIPE10849 A2 ZPIP13566 2 0 1 CIRCULAR 0.020 RCP 7.3 7.3 None 0.23 13.8 15.7 None 21.3 20.5 Both Upstream and Downstream 24.4 21.1 Both Upstream and Downstream PIPE11304 A2 ZPIP11948 5 0 1 CIRCULAR 0.028 RCP 60.1 60.1 None 0.14 149.5 149.3 None 259.6 259.5 None 305.6 284.8 None PIPE11321 A2 ZPIP16059 4 0 1 CIRCULAR 0.065 RCP 69.3 69.3 None 0.19 135.3 135.2 None 211.2 211.1 None 243.3 241.9 None PIPE11458 A2 ZPIP15998 2.5 0 1 CIRCULAR 0.022 RCP 16.1 16.1 None 0.26 27.0 26.7 None 40.4 39.6 Both Upstream and Downstream 46.1 40.8 Both Upstream and Downstream PIPE11497 A2 ZPIP15142 5 6 1 RECT_CLOSED 0.020 RCP 278.4 245.2 None 0.41 399.1 297.3 None 627.1 377.2 None 663.0 398.6 None PIPE11060 A2 ZPIP14449 2 0 1 CIRCULAR 0.066 CIPCP 10.0 10.1 None 0.2 17.4 17.5 None 26.6 26.5 None 30.4 32.6 None PIPE11194 A2 ZPIP11537 7 0 1 CIRCULAR 0.010 RCP 105.4 105.9 None 0.17 220.0 220.8 None 351.7 352.7 None 405.7 415.0 None PIPE11353 A2 ZPIP12218 2.5 0 1 CIRCULAR 0.004 RCP 5.7 5.7 None 0.21 10.2 10.2 None 15.7 15.7 None 18.0 17.9 None PIPE11436 A2 ZPIP15142 5 6 1 RECT_CLOSED 0.021 RCP 272.1 238.9 None 0.39 394.9 288.6 None 689.5 374.8 None 721.2 393.4 None PIPE11479 A2 ZPIP10284 4 0 1 CIRCULAR 0.007 RCP 30.4 27.5 None 0.23 47.4 46.4 None 70.6 66.0 None 81.0 76.0 None PIPE11121 A2 ZPIP14834 1.5 0 1 CIRCULAR 0.222 Unknown 12.3 12.3 None 0.25 19.9 23.2 None 29.7 29.6 Downstream 33.7 31.8 Both Upstream and Downstream PIPE11420 A2 ZPIP10768 2 0 1 CIRCULAR 0.032 HDPE 6.7 6.7 None 0.16 10.7 13.6 None 16.0 24.8 Upstream 18.1 25.9 Upstream PIPE11435 A2 PIP20029 3 0 1 CIRCULAR 0.004 RCP 9.8 9.7 None 0.23 19.1 15.3 None 81.7 22.7 None 92.2 27.0 None PIPE10796 A2 ZPIP13283 1.5 0 1 CIRCULAR 0.028 RCP 0.0 0.0 None 0 0.0 1.8 None 0.3 10.2 Both Upstream and Downstream 0.4 11.2 Both Upstream and Downstream PIPE10845 A2 ZPIP10611 1.5 0 1 CIRCULAR 0.080 RCP 5.3 5.3 None 0.18 9.6 9.6 None 14.5 14.5 None 16.6 18.4 None CULV10053 A2 ZCUL007A 2.5 2.5 1 RECT_CLOSED 0.014 RCP 27.8 30.1 None 0.49 53.7 34.8 Both Upstream and Downstream 66.8 35.5 Both Upstream and Downstream 68.4 37.8 Both Upstream and Downstream PIPE10995 A2 ZPIP11040 3 0 1 CIRCULAR 0.010 RCP 15.8 15.9 None 0.23 25.2 25.3 None 37.2 37.3 None 42.2 42.1 None PIPE10889 A2 ZPIP13700 6.5 0 1 CIRCULAR 0.018 RCP 108.0 108.9 None 0.16 215.4 214.2 None 359.5 358.6 None 421.3 421.0 None PIPE11001 A2 ZPIP11060 4 0 1 CIRCULAR 0.102 RCP 96.0 95.7 None 0.21 178.3 172.7 None 281.3 263.6 None 326.0 280.7 Downstream PIPE11076 A2 ZPIP14655 1.5 0 1 CIRCULAR 0.010 PVC 0.0 0.0 None 0 0.0 0.0 None 0.0 6.8 None 0.0 6.3 Both Upstream and Downstream PIPE11267 A2 ZPIP15782 2 0 1 CIRCULAR 0.004 PVC 2.7 3.5 None 0.24 4.6 5.4 None 7.3 7.8 None 9.1 8.7 None PIPE11357 A2 ZPIP17859 1.5 0 1 CIRCULAR 0.048 RCP 34.5 0.7 None 0.03 34.8 10.5 None 31.1 9.9 Upstream 33.7 14.0 None PIPE11375 A2 PIP19093 2 0 1 CIRCULAR 0.004 PVC 3.2 3.5 None 0.24 4.9 5.4 None 6.7 7.8 None 7.7 8.7 None PIPE11376 A2 PIP19094 2 0 1 CIRCULAR 0.004 PVC 4.4 3.5 None 0.24 7.1 5.4 None 10.4 7.8 None 10.7 8.7 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 19 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE11392 A2 ZPIP10903 3 0 1 CIRCULAR 0.048 RCP 35.1 35.1 None 0.24 59.9 59.7 None 93.1 82.4 None 105.8 89.6 None PIPE11419 A2 ZPIP10663 1.5 0 1 CIRCULAR 0.017 RCP 0.0 0.0 None 0 0.0 3.2 None 0.0 7.8 Both Upstream and Downstream 0.0 8.3 Both Upstream and Downstream PIPE10725 A2 ZPIP16805 3 0 1 CIRCULAR 0.045 RCP 28.3 28.4 None 0.2 45.2 45.1 None 66.2 81.0 Both Upstream and Downstream 74.9 85.4 Both Upstream and Downstream PIPE11184 A2 ZPIP17385 5.5 0 1 CIRCULAR 0.034 RCP 150.6 143.6 None 0.23 264.9 235.8 None 395.0 303.2 None 460.5 373.4 None PIPE11417 A2 ZPIP11889 3 0 1 CIRCULAR 0.011 HDPE 15.1 15.1 None 0.21 25.4 25.2 None 39.5 38.1 None 44.7 42.4 None PIPE11449 A2 ZPIP16024 2 0 1 CIRCULAR 0.022 RCP 5.7 5.8 None 0.17 11.5 11.6 None 17.9 17.9 None 20.5 20.4 None PIPE10909 A2 ZPIP10763 1.5 0 1 CIRCULAR 0.005 RCP 1.6 1.6 None 0.21 2.9 2.6 None 4.5 3.9 None 5.1 4.4 None PIPE11487 A2 ZPIP14448 2 0 1 CIRCULAR 0.069 CIPCP 10.1 10.1 None 0.2 17.5 17.6 None 26.7 26.7 None 30.5 30.3 None DTCH10495 A2 ZDD10025 2 3 1 PARABOLIC 0.005 Unknown 1.3 1.3 None 0.07 2.7 2.8 None 4.4 9.8 None 5.1 11.2 None PIPE10699 A2 ZPIP12863 2 0 1 CIRCULAR 0.013 RCP 4.7 4.7 None 0.18 8.7 8.8 None 13.1 13.1 None 15.1 15.1 None PIPE10727 A2 ZPIP16807 1.5 0 1 CIRCULAR 0.144 RCP 8.6 8.6 None 0.21 13.6 13.7 None 20.0 19.8 Downstream 22.5 23.0 Downstream PIPE10910 A2 ZPIP13756 5.75 0 1 CIRCULAR 0.022 RCP 69.4 69.5 None 0.12 173.6 172.8 None 284.9 283.6 None 335.4 326.3 None PIPE10928 A2 ZPIP14013 3 0 1 CIRCULAR 0.015 RCP 17.0 17.1 None 0.21 30.2 33.5 None 46.9 41.3 Downstream 53.5 48.0 Downstream PIPE11035 A2 ZPIP14429 1.5 0 1 CIRCULAR 0.005 RCP 0.9 0.9 None 0.13 1.7 1.7 None 2.6 2.5 None 3.0 4.1 None PIPE11056 A2 ZPIP14444 2 0 1 CIRCULAR 0.053 CIPCP 9.0 9.0 None 0.2 15.1 15.1 None 22.8 22.9 None 26.0 26.1 None PIPE11128 A2 ZPIP14838 3 0 1 CIRCULAR 0.053 RCP 37.5 37.5 None 0.24 63.6 63.2 None 96.6 86.5 Upstream 109.7 89.0 Both Upstream and Downstream PIPE11319 A2 ZPIP11962 1.5 0 1 CIRCULAR 0.186 RCP 7.6 7.6 None 0.17 14.5 14.5 None 22.6 22.6 None 26.1 26.1 None PIPE10848 A2 ZPIP16953 1.5 0 1 CIRCULAR 0.004 RCP 0.0 0.1 None 0.01 0.1 0.2 None 0.2 1.1 None 0.3 3.9 None PIPE10987 A2 ZPIP14273 1 0 1 CIRCULAR 0.059 RCP 2.0 2.0 None 0.23 3.0 3.0 None 4.4 4.4 None 4.9 4.9 None CULV10065 A2 ZCUL083B 8 12 1 RECT_CLOSED 0.009 RCP 407.7 420.1 None 0.22 695.8 677.8 None 1006.1 962.8 None 1041.2 1067.8 None PIPE10775 A2 ZPIP12977 1.5 0 1 CIRCULAR 0.020 RCP 3.1 3.1 None 0.21 5.0 5.0 None 7.3 7.3 None 8.3 8.2 None PIPE11007 A2 ZPIP11062 1.5 0 1 CIRCULAR 0.172 RCP 0.0 0.0 None 0 0.0 2.0 None 0.0 11.9 None 0.0 24.2 Downstream PIPE11011 A2 ZPIP17146 1.5 0 1 CIRCULAR 0.065 RCP 0.0 0.0 None 0 0.0 0.0 None 0.4 0.0 None 0.7 15.0 None PIPE11091 A2 ZPIP11239 1.5 0 1 CIRCULAR 0.031 RCP 3.0 3.0 None 0.16 5.9 5.9 None 9.1 9.1 None 10.3 10.3 None PIPE11398 A2 ZPIP10714 6.5 0 1 CIRCULAR 0.021 RCP 111.7 112.5 None 0.15 218.3 217.4 None 367.9 367.8 None 429.9 427.5 None PIPE10707 A2 ZPIP12930 3 0 1 CIRCULAR 0.038 RCP 40.7 39.9 None 0.31 64.9 64.5 None 95.2 71.8 Both Upstream and Downstream 107.6 71.2 Both Upstream and Downstream CULV10066 A2 ZCUL083C 8 12 1 RECT_CLOSED 0.009 RCP 408.1 420.7 None 0.22 696.0 678.0 None 1003.6 957.6 None 1038.0 1043.7 None PIPE11206 A2 ZPIP15412 1.5 0 1 CIRCULAR 0.061 RCP 4.6 4.6 None 0.18 8.3 8.3 None 12.5 12.5 None 14.3 14.3 None PIPE10704 A2 ZPIP12927 3 0 1 CIRCULAR 0.038 RCP 40.8 39.9 None 0.31 64.9 77.5 Downstream 95.2 71.8 Both Upstream and Downstream 107.6 70.2 Both Upstream and Downstream PIPE10999 A2 ZPIP17142 1.5 0 1 CIRCULAR 0.088 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 13.6 None 0.0 16.7 Both Upstream and Downstream PIPE11047 A2 ZPIP11112 2.5 0 1 CIRCULAR 0.038 RCP 10.5 10.5 None 0.13 23.2 23.2 None 37.2 37.1 None 43.1 43.0 None PIPE11053 A2 ZPIP17177 2 0 1 CIRCULAR 0.052 RCP 7.2 7.2 None 0.14 14.9 14.9 None 23.9 23.9 None 27.7 27.7 None CULV10092 A2 ZCUL083F 8 12 1 RECT_CLOSED 0.009 RCP 408.2 421.1 None 0.22 696.1 678.1 None 1003.7 959.3 None 1038.3 1032.8 None PIPE11156 A2 ZPIP11363 5.5 0 1 CIRCULAR 0.017 RCP 127.9 115.7 None 0.26 202.3 178.5 None 281.7 227.3 None 309.3 230.7 Downstream PIPE11280 A2 ZPIP15938 5 0 1 CIRCULAR 0.055 RCP 145.6 138.5 None 0.23 256.2 226.9 None 381.6 291.5 None 444.8 324.2 None PIPE11352 A2 ZPIP16515 2.5 0 1 CIRCULAR 0.004 RCP 4.5 4.5 None 0.16 8.1 8.1 None 12.6 12.6 None 14.4 14.5 None PIPE11455 A2 ZPIP17150 1.5 0 1 CIRCULAR 0.135 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 20.3 None PIPE10735 A2 ZPIP12949 1.5 0 1 CIRCULAR 0.201 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 24.9 Both Upstream and Downstream 0.1 24.5 Both Upstream and Downstream PIPE11178 A2 ZPIP15145 2 0 1 CIRCULAR 0.012 RCP 4.7 4.7 None 0.19 7.6 7.6 None 11.4 11.4 None 12.9 12.9 None PIPE11481 A2 ZPIP14778 4.5 0 1 CIRCULAR 0.047 CIPCP 43.1 46.6 None 0.13 84.2 86.0 None 138.6 220.6 Upstream 161.7 191.4 Both Upstream and Downstream PIPE10708 A2 ZPIP12931 1.5 0 1 CIRCULAR 0.009 RCP 1.2 1.2 None 0.11 1.8 1.8 None 2.6 5.7 None 3.0 5.2 None PIPE10827 A2 ZPIP16660 1.5 0 1 CIRCULAR 0.015 RCP 0.0 0.0 None 0 0.0 0.0 None 0.1 0.4 None 0.1 6.6 None PIPE10911 A2 ZPIP13757 3 0 1 CIRCULAR 0.088 RCP 31.6 31.6 None 0.16 57.0 56.4 None 87.7 86.2 None 102.8 100.4 None PIPE10948 A2 ZPIP14154 2 0 1 CIRCULAR 0.063 RCP 10.8 10.8 None 0.19 17.3 17.4 None 25.6 25.7 None 29.0 29.0 None PIPE11133 A2 ZPIP11331 2 0 1 CIRCULAR 0.010 RCP 4.2 4.2 None 0.19 6.5 6.6 None 9.4 10.4 None 10.6 11.4 None PIPE11328 A2 ZPIP11965 4 0 1 CIRCULAR 0.048 RCP 46.0 46.0 None 0.15 88.6 88.6 None 136.1 136.2 None 159.0 159.0 None PIPE11406 A2 2.5 0 1 CIRCULAR 0.006 RCP 5.0 5.0 None 0.16 8.3 8.4 None 12.5 11.6 Both Upstream and Downstream 14.2 16.2 Both Upstream and Downstream PIPE10681 A2 ZPIP16751 1 0 1 CIRCULAR 0.036 RCP 0.0 0.0 None 0 0.0 0.1 None 0.0 2.4 None 0.0 3.4 Both Upstream and Downstream PIPE10803 A2 ZPIP10520 2 0 1 CIRCULAR 0.031 RCP 5.9 5.9 None 0.15 9.4 9.4 None 13.7 14.1 None 15.5 19.9 None CULV10061 A2 ZCUL083A 8 12 1 RECT_CLOSED 0.011 RCP 408.3 421.7 None 0.2 696.2 678.2 None 1002.9 964.7 None 1045.3 1026.4 None PIPE11149 A2 ZPIP14903 1.5 0 1 CIRCULAR 0.010 RCP 0.0 0.0 None 0 0.0 0.2 None 0.2 2.6 Downstream 0.2 5.2 Both Upstream and Downstream CULV10088 A2 ZCUL12644C 4 6 2 RECT_CLOSED 0.028 RCP 134.7 135.4 None 0.13 484.9 484.2 None 496.5 497.7 None 503.1 518.2 None PIPE11318 A2 ZPIP11961 4 0 1 CIRCULAR 0.049 RCP 46.0 46.0 None 0.15 88.6 88.6 None 136.1 136.3 None 159.1 159.2 None PIPE11397 A2 ZPIP12865 3 0 1 CIRCULAR 0.018 RCP 15.3 15.3 None 0.17 26.1 26.1 None 38.9 39.0 None 44.1 44.4 None PIPE11443 A2 ZPIP14264 2 0 1 CIRCULAR 0.006 Unknown 3.3 3.3 None 0.19 5.3 5.3 None 7.8 7.8 None 8.8 8.8 None PIPE10700 A2 ZPIP12864 3 0 1 CIRCULAR 0.011 RCP 11.5 11.4 None 0.16 19.9 19.9 None 29.8 29.9 None 33.8 34.1 None PIPE11170 A2 ZPIP15137 7 0 1 CIRCULAR 0.021 RCP 114.9 115.4 None 0.12 239.4 240.5 None 383.6 385.7 None 441.5 453.2 None PIPE11192 A2 ZPIP11535 7 0 1 CIRCULAR 0.021 RCP 114.9 115.4 None 0.12 239.4 240.5 None 383.6 385.7 None 441.5 453.2 None PIPE11409 A2 ZPIP15225 2 0 1 CIRCULAR 0.008 HDPE 0.6 0.7 None 0.03 1.0 1.0 None 1.5 6.0 None 1.7 9.8 Upstream PIPE10719 A2 ZPIP10335 1.5 0 1 CIRCULAR 0.209 RCP 1.2 1.2 None 0.02 1.9 1.9 None 2.7 21.7 Both Upstream and Downstream 3.1 23.2 Both Upstream and Downstream PIPE10791 A2 ZPIP13268 1.5 0 1 CIRCULAR 0.220 ACP 8.5 8.5 None 0.17 14.1 14.4 None 21.0 21.0 None 23.8 23.7 Downstream PIPE11144 A2 ZPIP14899 1.5 0 1 CIRCULAR 0.013 RCP 1.8 1.8 None 0.15 3.3 3.4 None 4.9 5.0 None 5.7 5.8 None PIPE11166 A2 ZPIP14943 1.5 0 1 CIRCULAR 0.005 RCP 1.3 1.3 None 0.18 2.0 2.0 None 3.8 3.0 None 4.0 3.4 None PIPE11297 A2 ZPIP16023 2 0 1 CIRCULAR 0.022 HDPE 4.8 4.8 None 0.14 9.3 9.3 None 14.3 14.3 None 16.3 16.3 None PIPE11314 A2 ZPIP17641 2.5 0 1 CIRCULAR 0.117 RCP 18.4 18.4 None 0.13 36.6 36.6 None 58.2 58.2 None 67.4 67.4 None PIPE10871 A2 ZPIP13666 1.5 0 1 CIRCULAR 0.084 RCP 4.3 4.3 None 0.14 8.1 8.1 None 12.3 12.3 None 14.1 14.1 None PIPE11040 A2 ZPIP14431 7 0 1 CIRCULAR 0.021 RCP 111.3 111.9 None 0.12 231.7 232.7 None 370.7 372.4 None 426.5 437.8 None PIPE11052 A2 ZPIP17175 2 0 1 CIRCULAR 0.126 RCP 15.4 15.5 None 0.19 26.3 26.1 None 40.3 35.4 None 46.1 38.1 None PIPE11085 A2 ZPIP14668 1.5 0 1 CIRCULAR 0.026 RCP 0.0 0.0 None 0 0.1 0.1 None 0.2 0.3 None 0.3 7.8 Both Upstream and Downstream PIPE11176 A2 ZPIP15140 5 6 1 RECT_CLOSED 0.043 RCP 284.0 252.2 None 0.29 407.7 306.0 None 639.9 387.1 None 676.5 411.1 None PIPE11190 A2 ZPIP17390 7 0 1 CIRCULAR 0.024 RCP 116.3 116.8 None 0.12 244.2 246.1 None 406.2 415.2 None 447.5 460.7 None CULV10076 A2 ZCUL083E 8 12 1 RECT_CLOSED 0.011 RCP 378.7 393.3 Upstream 0.19 646.2 634.0 Upstream 909.0 916.9 Upstream 947.7 960.7 Upstream PIPE11402 A2 ZPIP15411 1.5 0 1 CIRCULAR 0.120 RCP 3.9 4.0 None 0.11 6.6 13.9 Both Upstream and Downstream 10.0 16.6 Both Upstream and Downstream 11.4 17.0 Both Upstream and Downstream PIPE10904 A2 ZPIP17025 2.5 0 1 CIRCULAR 0.018 RCP 7.2 7.2 None 0.13 13.6 13.6 None 22.4 22.3 None 25.5 25.4 None PIPE11381 A2 ZPIP18017 1.5 0 1 CIRCULAR 0.016 HDPE 1.7 1.7 None 0.13 3.3 3.3 None 5.2 5.2 None 6.0 6.0 None PIPE10711 A2 ZPIP10333 1.5 0 1 CIRCULAR 0.017 RCP 0.0 0.0 None 0 0.0 0.2 None 0.1 6.2 Downstream 0.1 6.2 Both Upstream and Downstream

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 20 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE10765 A2 ZPIP12970 3 0 1 CIRCULAR 0.052 RCP 40.8 39.9 None 0.26 65.0 65.1 Both Upstream and Downstream 95.2 67.0 Both Upstream and Downstream 107.7 68.3 Both Upstream and Downstream PIPE11089 A2 ZPIP11237 3 0 1 CIRCULAR 0.207 RCP 52.8 52.6 None 0.17 93.0 90.9 None 138.2 127.4 None 153.0 135.4 None PIPE11111 A2 ZPIP14780 2 0 1 CIRCULAR 0.005 RCP 1.0 0.9 None 0.06 19.5 7.3 None 23.7 7.3 None 27.0 7.0 None PIPE11123 A2 ZPIP14836 1.5 0 1 CIRCULAR 0.036 RCP 0.0 0.0 None 0 0.0 0.6 None 0.0 11.2 Both Upstream and Downstream 0.0 9.0 Both Upstream and Downstream CULV10090 A2 ZCUL15103A 3 7 3 RECT_CLOSED 0.028 RCP 124.9 124.9 None 0.1 258.7 258.7 None 467.8 455.1 None 555.3 555.9 None PIPE10834 A2 ZPIP10607 1.5 0 1 CIRCULAR 0.095 RCP 4.6 4.6 None 0.14 8.3 8.3 None 12.6 12.6 None 14.3 14.4 None PIPE10975 A2 ZPIP14254 1.5 0 1 CIRCULAR 0.034 RCP 3.1 3.1 None 0.16 5.0 5.0 None 7.5 7.5 None 8.5 8.5 None PIPE11041 A2 ZPIP14432 7 0 1 CIRCULAR 0.026 RCP 115.8 116.3 None 0.11 241.0 242.1 None 388.1 388.5 None 445.0 456.7 None PIPE11158 A2 ZPIP14918 1.5 0 1 CIRCULAR 0.045 RCP 0.6 0.4 None 0.02 0.9 0.3 None 1.0 9.6 None 0.9 9.9 None PIPE11191 A2 ZPIP17391 7 0 1 CIRCULAR 0.026 RCP 116.3 116.8 None 0.11 243.6 244.9 None 399.8 390.6 None 447.5 459.7 None PIPE11277 A2 ZPIP17598 2 0 1 CIRCULAR 0.057 RCP 8.8 8.8 None 0.16 14.2 14.2 None 21.0 21.0 None 23.8 23.8 None PIPE11287 A2 ZPIP11912 1.5 0 1 CIRCULAR 0.041 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 7.6 Downstream 0.0 9.3 Downstream PIPE10718 A2 ZPIP12938 1.5 0 1 CIRCULAR 0.042 RCP 1.2 1.2 None 0.06 1.9 1.9 None 2.7 8.8 Downstream 3.1 9.4 Both Upstream and Downstream PIPE10730 A2 ZPIP10340 2 0 1 CIRCULAR 0.094 RCP 9.3 9.3 None 0.13 14.8 14.8 None 21.7 23.4 None 24.5 29.9 None PIPE10885 A2 ZPIP13690 1.5 0 1 CIRCULAR 0.059 HDPE 2.8 2.8 None 0.11 5.9 5.9 None 9.4 9.4 None 10.9 10.9 None PIPE10926 A2 ZPIP17050 2 0 1 CIRCULAR 0.024 RCP 4.8 4.8 None 0.14 8.8 8.8 None 13.1 13.1 None 15.1 15.1 None PIPE11062 A2 ZPIP14537 1.5 0 1 CIRCULAR 0.069 RCP 4.1 4.1 None 0.15 6.9 6.9 None 10.4 10.4 None 11.8 11.8 None PIPE11079 A2 ZPIP14660 1.5 0 1 CIRCULAR 0.016 RCP 2.1 2.1 None 0.16 3.4 3.4 None 5.0 5.0 None 5.7 5.7 None PIPE11224 A2 ZPIP15441 1.5 0 1 CIRCULAR 0.009 RCP 0.0 0.0 None 0 0.0 0.1 None 0.1 6.0 None 0.1 4.3 None PIPE11457 A2 ZPIP15999 1.5 0 1 CIRCULAR 0.049 RCP 0.0 0.0 None 0 0.0 0.0 None 0.1 12.4 Downstream 0.6 9.9 Both Upstream and Downstream PIPE10705 A2 ZPIP12928 1.5 0 1 CIRCULAR 0.155 RCP 8.5 8.5 None 0.2 13.6 16.6 None 19.9 18.7 Both Upstream and Downstream 22.5 17.2 Both Upstream and Downstream PIPE11477 A2 ZPIP14224 2.5 0 1 CIRCULAR 0.027 RCP 10.5 10.6 None 0.16 16.9 17.0 None 107.2 24.9 None 107.7 28.1 None PIPE10833 A2 ZPIP16951 1.5 0 1 CIRCULAR 0.036 RCP 1.2 1.2 None 0.06 2.3 2.3 None 3.5 6.9 None 4.0 8.1 None PIPE11031 A2 ZPIP11106 1.5 0 1 CIRCULAR 0.013 RCP 0.1 0.1 None 0.01 0.1 0.1 None 0.1 4.2 None 0.2 4.7 None PIPE11058 A2 ZPIP14446 2 0 1 CIRCULAR 0.053 CIPCP 6.2 6.3 None 0.14 10.5 10.5 None 15.9 15.9 None 18.1 18.1 None PIPE11263 A2 ZPIP17556 1.5 0 1 CIRCULAR 0.014 PVC 0.6 0.2 None 0.02 0.8 5.0 None 1.3 4.9 Upstream 1.3 4.9 Upstream PIPE11326 A2 ZPIP11963 2.5 0 1 CIRCULAR 0.031 RCP 7.0 7.0 None 0.1 15.1 15.1 None 24.6 24.6 None 28.7 29.0 None PIPE11440 A2 1.5 0 1 CIRCULAR 0.080 RCP 9.3 11.9 None 0.4 86.6 10.7 None 48.5 17.1 Both Upstream and Downstream 32.5 11.8 Both Upstream and Downstream PIPE10731 A2 ZPIP12945 2 0 1 CIRCULAR 0.076 RCP 9.3 9.3 None 0.15 14.8 14.8 None 21.7 21.7 None 24.5 24.4 None PIPE10861 A2 ZPIP13641 1.5 0 1 CIRCULAR 0.115 RCP 0.0 0.0 None 0 0.0 0.0 None 0.1 7.6 Downstream 0.1 13.8 Both Upstream and Downstream PIPE11030 A2 ZPIP17174 2.5 0 1 CIRCULAR 0.072 RCP 10.5 10.5 None 0.1 23.1 23.1 None 37.1 37.0 None 43.0 43.0 None PIPE11064 A2 ZPIP11198 2 0 1 CIRCULAR 0.084 RCP 9.8 9.8 None 0.15 15.5 15.5 None 22.7 22.7 None 25.6 25.6 None PIPE11399 A2 ZPIP13755 2 0 1 CIRCULAR 0.033 RCP 0.0 0.0 None 0 0.1 0.2 None 0.7 14.4 None 1.3 16.2 None PIPE10745 A2 ZPIP12957 1.5 0 1 CIRCULAR 0.024 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 1.7 None 0.0 6.3 None PIPE10816 A2 ZPIP10590 1.5 0 1 CIRCULAR 0.129 RCP 4.5 4.5 None 0.12 8.2 8.2 None 12.5 12.5 None 14.2 14.3 None PIPE10869 A2 ZPIP13659 1.5 0 1 CIRCULAR 0.005 RCP 1.1 1.1 None 0.14 1.7 1.7 None 2.5 2.6 None 2.9 2.9 None PIPE10898 A2 ZPIP10742 1.5 0 1 CIRCULAR 0.117 HDPE 4.3 4.3 None 0.12 7.7 7.7 None 11.8 11.8 None 13.5 13.5 None PIPE11115 A2 ZPIP14830 2 0 1 CIRCULAR 0.032 RCP 2.5 2.5 None 0.06 3.9 6.8 None 5.8 11.7 Both Upstream and Downstream 6.5 14.8 Both Upstream and Downstream PIPE11383 A2 ZPIP18021 1.5 0 1 CIRCULAR 0.035 HDPE 2.3 2.3 None 0.12 4.1 4.1 None 6.3 6.3 None 7.3 7.3 None PIPE10907 A2 ZPIP13750 4 0 1 CIRCULAR 0.014 HDPE 18.7 18.8 None 0.11 34.1 34.2 None 50.4 53.0 None 55.8 61.0 None PIPE10931 A2 ZPIP10947 1.5 0 1 CIRCULAR 0.038 RCP 0.0 0.0 None 0 0.0 0.1 None 0.0 6.5 None 0.0 7.4 None PIPE10970 A2 ZPIP11014 8 4 2 RECT_CLOSED 0.006 RCP 126.5 113.0 None 0.17 203.9 174.0 None 276.4 252.1 Upstream 305.1 245.3 Both Upstream and Downstream PIPE11197 A2 ZPIP15229 8 4 2 RECT_CLOSED 0.006 RCP 127.9 115.5 None 0.17 206.6 177.8 None 292.8 251.9 None 308.3 247.8 Both Upstream and Downstream PIPE11282 A2 ZPIP15940 3 0 1 CIRCULAR 0.012 RCP 0.3 0.3 None 0 0.4 0.7 None 0.9 21.5 Both Upstream and Downstream 1.5 25.9 Both Upstream and Downstream PIPE11143 A2 ZPIP17262 1 0 1 CIRCULAR 0.279 RCP 0.0 0.0 None 0 0.3 0.1 None 36.2 1.5 None 33.8 6.7 None CHAN10108 A2 CH027C 0 0 1 IRREGULAR 0.010 Concrete 257.6 264.1 None 0.16 445.6 431.5 None 643.4 554.5 None 734.8 579.6 None PIPE10679 A2 ZPIP12775 2 0 1 CIRCULAR 0.010 RCP 0.0 0.2 None 0.01 0.2 0.4 None 0.7 4.9 None 0.7 7.6 Both Upstream and Downstream PIPE10824 A2 ZPIP13448 2.5 0 1 CIRCULAR 0.113 RCP 15.3 15.5 None 0.11 29.6 29.3 None 45.6 44.5 None 52.3 46.5 None PIPE11279 A2 ZPIP11895 1.5 0 1 CIRCULAR 0.027 RCP 0.0 0.0 None 0 25.5 5.8 None 26.8 6.1 None 26.4 5.8 None CULV10093 A2 ZCUL14187 3.5 8.2 3 RECT_CLOSED 0.021 RCP 126.0 126.0 None 0.08 260.9 260.9 None 450.5 448.4 None 586.0 555.6 None PIPE11494 A2 2 0 1 CIRCULAR 0.094 ACP 7.7 7.7 Downstream 0.11 13.4 13.4 Downstream 20.4 20.5 Downstream 23.3 23.4 Downstream PIPE11259 A2 ZPIP15642 2 0 1 CIRCULAR 0.021 RCP 0.8 0.8 None 0.03 1.4 1.4 None 2.0 9.9 None 2.3 10.7 None PIPE11408 A2 ZPIP15225 2 0 1 CIRCULAR 0.008 HDPE 0.7 0.7 None 0.03 1.1 1.1 None 1.6 7.7 None 1.8 6.6 Downstream PIPE10749 A2 ZPIP10346 1.5 0 1 CIRCULAR 0.355 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 18.4 None 0.0 19.9 None PIPE10894 A2 ZPIP13706 2.5 0 1 CIRCULAR 0.066 HDPE 9.7 9.7 None 0.09 18.2 18.2 None 29.8 29.8 None 33.9 33.8 None PIPE10738 A2 ZPIP10342 1.5 0 1 CIRCULAR 0.165 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 7.9 None 0.0 13.3 None CULV10050 A2 ZCUL004B 3 0 2 CIRCULAR 0.110 RCP 76.2 58.7 None 0.13 105.7 91.8 None 162.3 138.5 None 176.7 135.7 None PIPE10870 A2 ZPIP13660 1.5 0 1 CIRCULAR 0.008 RCP 1.1 1.1 None 0.11 1.7 1.7 None 2.6 2.6 None 2.9 2.9 None PIPE11112 A2 ZPIP14781 1.5 0 1 CIRCULAR 0.006 RCP 0.7 0.0 None 0 2.6 0.0 None 2.4 0.7 None 4.3 2.5 None PIPE11113 A2 ZPIP17250 2 0 1 CIRCULAR 0.006 RCP 1.8 0.2 None 0.01 3.6 0.4 None 4.0 1.0 None 7.5 5.4 None PIPE11209 A2 ZPIP17464 1.5 0 1 CIRCULAR 0.192 RCP 4.6 4.6 None 0.1 8.3 8.3 None 12.6 12.6 None 14.3 14.3 None PIPE11296 A2 ZPIP16022 2 0 1 CIRCULAR 0.022 HDPE 3.2 3.2 None 0.09 6.0 6.0 None 9.2 9.2 None 10.5 10.5 None CULV10112 A2 5.5 0 3 CIRCULAR 0.034 RCP 176.3 163.5 None 0.09 303.8 285.4 None 518.7 486.6 None 603.2 575.0 None PIPE10714 A2 ZPIP12934 1.5 0 1 CIRCULAR 0.009 RCP 1.2 1.2 None 0.12 1.9 1.9 None 2.7 2.7 None 3.1 3.1 None PIPE10882 A2 ZPIP13687 2.5 0 1 CIRCULAR 0.006 HDPE 3.0 3.0 None 0.1 5.2 5.3 None 8.0 8.0 None 9.1 9.1 None PIPE11071 A2 ZPIP14634 3 0 1 CIRCULAR 0.014 RCP 7.7 7.8 None 0.1 13.3 13.8 None 20.7 20.9 None 23.9 24.1 None PIPE11260 A2 ZPIP15643 2 0 1 CIRCULAR 0.021 RCP 0.8 0.8 None 0.02 1.3 1.8 None 2.0 12.8 None 2.2 9.8 Downstream PIPE11305 A2 ZPIP16033 5 0 1 CIRCULAR 0.121 RCP 56.8 56.8 None 0.06 141.4 141.4 None 232.9 232.6 None 275.0 268.9 None CULV10091 A2 ZCUL084E 5.5 0 1 CIRCULAR 0.014 RCP 43.7 52.2 None 0.13 77.7 69.5 None 138.4 108.4 None 186.6 117.1 None PIPE11359 A2 ZPIP16568 1.5 0 1 CIRCULAR 0.010 RCP 0.0 0.0 None 0 0.0 0.1 None 0.1 0.1 None 0.1 3.1 None PIPE11360 A2 ZPIP16569 1.5 0 1 CIRCULAR 0.010 RCP 0.0 0.0 None 0 0.0 0.0 None 0.1 0.1 None 0.1 3.1 None PIPE10743 A2 ZPIP12954 2.5 0 1 CIRCULAR 0.153 RCP 15.7 15.7 None 0.1 28.4 31.6 Both Upstream and Downstream 43.8 39.9 Both Upstream and Downstream 50.1 46.3 Both Upstream and Downstream PIPE10976 A2 ZPIP11022 1.5 0 1 CIRCULAR 0.011 RCP 1.2 1.2 None 0.11 1.9 1.9 None 2.8 2.8 None 3.2 3.2 None PIPE11021 A2 ZPIP17161 3 0 1 CIRCULAR 0.015 RCP 7.7 7.8 None 0.1 13.4 13.8 None 20.7 20.9 None 23.9 24.1 None CULV10067 A2 ZCUL084C 5.5 0 1 CIRCULAR 0.014 RCP 44.4 48.7 None 0.12 77.0 68.1 None 138.1 102.7 None 182.3 113.5 None PIPE11295 A2 ZPIP16021 2 0 1 CIRCULAR 0.026 HDPE 3.2 3.2 None 0.09 6.0 6.0 None 9.2 9.2 None 10.6 10.6 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 21 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE11453 A2 ZPIP11115 2 0 1 CIRCULAR 0.182 RCP 7.2 7.2 None 0.07 14.9 14.9 None 23.9 23.9 None 27.6 27.7 None PIPE10709 A2 ZPIP12932 2.5 0 1 CIRCULAR 0.174 RCP 24.4 23.5 None 0.14 38.9 35.8 None 57.0 46.3 Both Upstream and Downstream 64.4 47.3 Both Upstream and Downstream PIPE11181 A2 ZPIP17365 2 0 1 CIRCULAR 0.010 Unknown 0.0 0.0 None 0 0.0 1.1 None 0.0 7.4 Both Upstream and Downstream 0.0 6.2 Both Upstream and Downstream PIPE11273 A2 ZPIP15908 3 0 1 CIRCULAR 0.036 RCP 0.0 0.7 None 0.01 7.7 1.8 None 8.0 3.8 Both Upstream and Downstream 7.7 35.2 Both Upstream and Downstream FLOW10016 A2 0 0 1 IRREGULAR 0.028 CONCRETE 9.4 4.0 Downstream 0.03 17.3 6.0 Downstream 23.8 21.6 Downstream 24.9 31.6 Downstream PIPE10703 A2 ZPIP10331 2 0 1 CIRCULAR 0.031 RCP 4.1 4.1 None 0.1 6.5 6.5 None 9.6 9.6 None 10.8 10.8 None PIPE10991 A2 ZPIP17134 3 0 1 CIRCULAR 0.041 RCP 13.7 13.7 None 0.1 21.8 21.8 None 32.3 32.3 None 36.6 36.6 None PIPE11092 A2 ZPIP14672 1.5 0 1 CIRCULAR 0.133 RCP 3.1 3.1 None 0.08 6.0 6.0 None 9.1 9.1 None 10.4 10.4 None PIPE11196 A2 ZPIP15228 2 0 1 CIRCULAR 0.210 RCP 6.8 10.6 None 0.1 12.1 17.4 None 19.2 25.3 None 22.4 28.5 None PIPE11205 A2 ZPIP11638 2 0 1 CIRCULAR 0.017 RCP 0.0 0.0 None 0 0.0 0.2 None 0.0 7.6 None 0.0 8.2 None PIPE11488 A2 ZPIP11887 1.5 0 1 CIRCULAR 0.046 RCP 0.0 0.0 None 0 0.0 0.0 Downstream 0.0 0.0 Downstream 0.0 6.1 Downstream PIPE11153 A2 ZPIP14907 1 0 1 CIRCULAR 0.062 RCP 11.4 0.6 None 0.07 10.2 4.1 None 14.9 3.6 None 13.7 2.4 None PIPE11413 A2 ZPIP12200 2.5 0 1 CIRCULAR 0.070 RCP 0.6 0.7 None 0.01 1.0 1.0 None 1.5 23.7 None 1.7 28.1 Downstream PIPE10884 A2 ZPIP13689 4 0 1 CIRCULAR 0.014 HDPE 12.3 12.4 None 0.07 23.1 23.2 None 35.2 36.5 None 39.1 42.1 None PIPE11034 A2 ZPIP14427 2 0 1 CIRCULAR 0.010 RCP 0.9 0.9 None 0.04 1.7 1.8 None 2.6 2.9 None 3.0 5.6 None PIPE11059 A2 ZPIP14447 2 0 1 CIRCULAR 0.137 CIPCP 6.3 6.3 None 0.09 10.6 10.6 None 16.1 16.1 None 18.3 18.3 None PIPE11151 A2 ZPIP14905 1.5 0 1 CIRCULAR 0.029 RCP 0.0 0.0 None 0 0.0 0.1 None 0.0 3.6 Downstream 0.0 4.4 Both Upstream and Downstream PIPE10766 A2 ZPIP12971 1.5 0 1 CIRCULAR 0.295 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 10.8 None 0.0 13.9 None PIPE10935 A2 ZPIP14111 2.5 0 1 CIRCULAR 0.452 RCP 22.9 23.1 None 0.08 41.2 41.0 None 62.9 56.8 None 72.0 67.5 None PIPE11070 A2 ZPIP11219 3 0 1 CIRCULAR 0.016 RCP 6.5 6.7 None 0.08 11.0 11.4 None 17.1 17.2 None 19.7 19.8 None PIPE11080 A2 ZPIP14661 2 0 1 CIRCULAR 0.011 PVC 2.1 2.1 None 0.09 3.3 3.4 None 5.0 5.0 None 5.6 5.7 None PIPE11084 A2 ZPIP14667 1.5 0 1 CIRCULAR 0.053 RCP 0.0 0.0 None 0 0.1 0.0 None 0.1 1.7 None 0.1 5.9 Both Upstream and Downstream PIPE11202 A2 ZPIP15343 1.5 0 1 CIRCULAR 0.115 RCP 3.1 3.1 None 0.09 5.0 5.0 None 7.4 7.4 None 8.4 8.4 None PIPE11247 A2 ZPIP11714 3.5 0 1 CIRCULAR 0.044 RCP 10.7 62.5 Upstream 0.3 18.3 60.7 Both Upstream and Downstream 28.0 69.4 Both Upstream and Downstream 32.2 51.4 Both Upstream and Downstream PIPE11467 A2 ZPIP11221 2 0 1 CIRCULAR 0.049 RCP 4.0 4.0 None 0.08 7.1 7.1 None 10.7 10.8 None 12.3 12.3 None PIPE10840 A2 ZPIP13465 1.5 0 1 CIRCULAR 0.004 RCP 0.0 0.0 None 0 0.0 0.2 None 0.1 1.5 None 0.1 1.5 None PIPE10960 A2 ZPIP10994 3 0 1 CIRCULAR 0.298 RCP 22.8 22.8 None 0.06 44.2 47.7 None 70.3 80.6 Both Upstream and Downstream 79.5 78.4 Both Upstream and Downstream CULV10055 A2 ZCUL15633 16 36 1 RECT_CLOSED 0.005 RCP 1079.7 1112.4 None 0.08 1990.3 1952.1 None 3140.2 2849.2 None 3498.7 3137.5 None PIPE10971 A2 ZPIP14237 1 0 1 CIRCULAR 0.013 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.5 None 0.0 0.9 None PIPE11048 A2 ZPIP14437 2 0 1 CIRCULAR 0.406 RCP 11.3 11.3 None 0.08 19.1 19.1 None 28.4 28.4 None 32.1 32.1 None PIPE11082 A2 ZPIP11234 2 0 1 CIRCULAR 0.175 RCP 7.5 7.5 None 0.08 12.2 12.2 None 18.2 18.2 None 20.6 20.7 Downstream PIPE11313 A2 ZPIP17640 1.5 0 1 CIRCULAR 0.064 RCP 1.9 1.9 None 0.07 3.3 3.3 None 5.0 5.0 None 5.7 5.7 None PIPE10825 A2 ZPIP16658 1.5 0 1 CIRCULAR 0.059 RCP 0.0 0.0 None 0 0.0 3.3 None 0.0 4.6 None 0.0 5.3 Downstream PIPE11140 A2 ZPIP11335 1.5 0 1 CIRCULAR 0.270 RCP 0.0 0.0 None 0 0.1 0.0 None 24.3 3.6 None 32.3 11.4 None PIPE11351 A2 ZPIP18029 4 0 1 CIRCULAR 0.012 RCP 12.4 12.9 None 0.08 19.7 20.5 None 28.5 30.0 None 32.2 33.8 None PIPE11444 A2 ZPIP11327 1.5 0 1 CIRCULAR 0.144 RCP 0.0 0.0 None 0 0.0 4.2 None 0.0 12.1 Downstream 0.0 8.6 Both Upstream and Downstream PIPE10886 A2 ZPIP13691 3 0 1 CIRCULAR 0.015 HDPE 5.0 5.0 None 0.06 8.9 8.9 None 13.7 13.7 None 15.7 15.8 None PIPE10888 A2 ZPIP13699 1.5 0 1 CIRCULAR 0.392 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 15.1 None 0.0 12.9 None PIPE11029 A2 ZPIP17173 1.5 0 1 CIRCULAR 0.235 RCP 2.1 2.1 None 0.04 5.5 5.5 None 8.9 8.9 None 10.4 10.4 None PIPE11308 A2 ZPIP17630 1.5 0 1 CIRCULAR 0.020 RCP 0.0 0.0 None 0 0.3 0.0 None 9.7 0.0 None 11.6 3.0 None PIPE11473 A2 ZPIP11013 2 0 1 CIRCULAR 0.107 RCP 5.3 5.3 None 0.07 8.7 8.7 None 12.9 12.9 None 14.6 14.6 None PIPE11484 A2 0 0 1 IRREGULAR 0.055 CONCRETE 9.0 9.3 None 0.06 18.4 17.7 None 26.5 27.6 None 30.6 31.8 Downstream PIPE10868 A2 ZPIP10715 6 0 1 CIRCULAR 0.162 RCP 69.6 70.1 None 0.04 174.0 173.2 None 285.6 284.2 None 336.1 327.1 None PIPE10880 A2 ZPIP13684 4 0 1 CIRCULAR 0.015 HDPE 9.3 9.3 None 0.05 17.7 17.8 None 27.9 27.9 None 32.3 32.4 None PIPE11201 A2 ZPIP15341 1.5 0 1 CIRCULAR 0.078 RCP 1.0 1.0 None 0.03 1.5 1.5 None 2.2 2.3 None 2.4 5.5 None PIPE11370 A2 PIP19033 3 0 1 CIRCULAR 0.003 RCP 2.3 3.1 None 0.08 3.9 4.6 None 5.9 6.2 None 6.9 7.0 None PIPE11460 A2 ZPIP15996 1.5 0 1 CIRCULAR 0.052 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 2.5 None 0.0 4.7 None PIPE11480 A2 ZPIP17240 4.5 0 1 CIRCULAR 0.163 RCP 38.7 39.6 None 0.05 79.4 80.9 None 129.4 129.7 Downstream 151.3 153.8 Downstream PIPE10836 A2 ZPIP13462 2.5 0 1 CIRCULAR 0.445 RCP 15.3 15.5 None 0.06 29.6 30.2 None 45.6 44.8 None 52.3 50.5 None PIPE11081 A2 ZPIP14664 2 0 1 CIRCULAR 0.019 PVC 2.0 2.1 None 0.07 3.3 3.3 None 5.0 5.0 None 5.6 5.7 None PIPE11329 A2 ZPIP16064 1.5 0 1 CIRCULAR 0.090 RCP 1.9 1.9 None 0.06 3.3 3.3 None 5.0 5.0 None 5.7 5.7 None FLOW10012 A2 0 0 1 IRREGULAR 0.027 RCP 6.9 6.9 None 0.06 11.6 11.2 None 18.2 18.3 None 20.9 20.4 None PIPE10734 A2 ZPIP12948 2 0 1 CIRCULAR 0.086 RCP 4.2 4.2 None 0.06 6.7 6.7 None 9.7 9.7 None 11.0 11.0 None CULV10057 A2 ZCUL084B 2 8 2 RECT_CLOSED 0.029 RCP 39.4 42.1 None 0.08 73.3 57.2 None 117.2 81.5 None 162.8 89.7 None PIPE11038 A2 ZPIP11108 1.5 0 1 CIRCULAR 0.012 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.2 None 0.0 2.0 None PIPE11278 A2 ZPIP11894 1.5 0 1 CIRCULAR 0.583 RCP 0.0 0.0 None 0 0.0 5.9 None 0.0 12.6 Both Upstream and Downstream 0.0 13.4 Both Upstream and Downstream PIPE11430 A2 ZPIP11064 6.5 0 1 CIRCULAR 0.013 RCP 31.2 31.8 None 0.05 55.5 56.0 None 85.5 86.5 None 98.1 98.8 None PIPE11431 A2 ZPIP11064 6.5 0 1 CIRCULAR 0.013 RCP 31.5 32.0 None 0.05 56.0 56.4 None 86.2 86.9 None 98.9 99.3 None PIPE10722 A2 ZPIP12939 1.5 0 1 CIRCULAR 0.096 RCP 1.2 1.2 None 0.04 1.9 1.9 None 2.7 3.4 None 3.1 5.3 Downstream PIPE10892 A2 ZPIP13704 2.5 0 1 CIRCULAR 0.020 HDPE 3.0 3.0 None 0.05 5.3 5.3 None 8.0 8.0 None 9.1 9.1 None PIPE10903 A2 ZPIP17024 1.5 0 1 CIRCULAR 0.355 RCP 2.9 2.9 None 0.05 5.6 5.6 None 8.9 8.9 None 10.2 10.2 None PIPE10776 A2 ZPIP10354 1.5 0 1 CIRCULAR 0.271 RCP 3.1 3.1 None 0.06 5.0 5.0 None 7.3 7.3 None 8.2 8.2 None PIPE11027 A2 ZPIP17171 1.5 0 1 CIRCULAR 0.009 RCP 0.1 0.1 None 0 0.1 0.1 None 0.1 1.6 None 0.1 1.5 None PIPE11427 A2 ZPIP11064 6.5 0 1 CIRCULAR 0.013 RCP 30.0 30.5 None 0.05 51.0 51.4 None 77.1 77.3 None 87.9 88.1 None PIPE10695 A2 ZPIP10291 1.5 0 1 CIRCULAR 0.040 RCP 1.3 0.3 None 0.02 1.7 0.9 None 2.0 1.5 None 1.3 2.8 None PIPE11331 A2 ZPIP16066 2 0 1 CIRCULAR 0.451 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 15.8 None 0.0 21.5 None FLOW10011 A2 0 0 1 IRREGULAR 0.026 RCP 1.9 5.1 None 0.05 3.8 8.8 Downstream 6.1 13.5 Downstream 7.1 15.8 Downstream CHAN10109 A2 CH027C 0 0 1 IRREGULAR 0.062 Concrete 257.3 263.4 None 0.06 629.1 562.3 None 650.6 554.4 None 733.6 579.3 None PIPE10800 A2 ZPIP13288 1.5 0 1 CIRCULAR 0.334 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 2.2 None 0.0 8.1 None PIPE10881 A2 ZPIP13686 2 0 1 CIRCULAR 0.020 HDPE 1.4 1.4 None 0.04 2.4 2.4 None 3.7 3.7 None 4.2 4.2 None PIPE11072 A2 ZPIP14635 3 0 1 CIRCULAR 0.056 RCP 6.5 6.7 None 0.04 11.0 11.4 None 17.0 17.2 None 19.7 19.7 None PIPE11073 A2 ZPIP14636 3 0 1 CIRCULAR 0.051 RCP 6.5 6.7 None 0.04 11.0 11.4 None 17.0 17.2 None 19.7 19.7 None PIPE11291 A2 ZPIP11939 2 0 1 CIRCULAR 0.015 RCP 1.2 1.2 None 0.04 2.1 2.1 None 3.2 3.2 None 3.6 3.6 None PIPE11367 A2 PIP16811 6.5 0 1 CIRCULAR 0.013 RCP 28.0 28.1 None 0.05 46.7 46.6 None 70.3 69.5 None 80.0 79.2 None PIPE11393 A2 ZPIP10904 1.5 0 1 CIRCULAR 0.004 RCP 0.1 0.1 None 0.01 0.2 0.1 None 0.2 0.6 None 0.2 0.8 None PIPE10793 A2 ZPIP10515 2 0 1 CIRCULAR 0.319 RCP 2.1 2.1 None 0.02 3.3 3.3 None 4.8 12.2 Downstream 5.4 14.8 Both Upstream and Downstream

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 22 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE10865 A2 ZPIP13655 4 0 1 CIRCULAR 0.276 RCP 26.0 30.8 None 0.04 43.1 50.3 None 63.9 76.4 None 72.5 92.5 None PIPE11230 A2 ZPIP11687 5 0 1 CIRCULAR 0.015 RCP 11.8 11.9 None 0.04 22.2 22.3 None 33.5 33.7 None 38.5 38.5 None PIPE11476 A2 ZPIP14223 2 0 1 CIRCULAR 0.026 RCP 0.0 0.0 None 0 0.1 0.0 None 18.4 3.9 None 20.5 4.4 None CHAN10138 A2 ZCH10061 0 0 1 IRREGULAR 0.006 EARTHEN 338.6 338.2 None 0.03 677.8 676.7 None 1101.1 1096.2 None 1290.3 1386.8 None PIPE10701 A2 ZPIP10329 1.5 0 1 CIRCULAR 0.321 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 1.0 None 0.0 6.7 None PIPE10706 A2 ZPIP12929 1.5 0 1 CIRCULAR 0.211 RCP 0.0 0.0 None 0 0.0 0.7 None 0.0 4.4 Both Upstream and Downstream 0.0 5.5 Both Upstream and Downstream PIPE10713 A2 ZPIP12933 1.5 0 1 CIRCULAR 0.073 RCP 1.2 1.2 None 0.04 1.9 1.9 None 2.7 2.7 None 3.1 3.1 None PIPE10988 A2 ZPIP14274 1.5 0 1 CIRCULAR 0.024 RCP 0.7 0.7 None 0.04 1.8 1.1 None 7.9 1.7 None 12.6 1.9 None PIPE10989 A2 ZPIP14275 2 0 1 CIRCULAR 0.028 RCP 1.5 1.5 None 0.04 2.5 2.5 None 3.7 3.7 None 4.1 4.2 None PIPE11294 A2 ZPIP16020 2 0 1 CIRCULAR 0.175 HDPE 3.2 3.2 None 0.03 6.1 6.1 None 9.3 9.3 None 10.6 10.6 None PIPE11299 A2 ZPIP16029 5 0 1 CIRCULAR 0.016 RCP 11.7 11.8 None 0.04 21.8 22.1 None 33.2 33.3 None 38.1 35.8 None PIPE10751 A2 ZPIP12959 1.5 0 1 CIRCULAR 0.455 RCP 3.4 3.4 None 0.05 5.7 5.5 None 8.5 7.3 None 9.7 7.4 None PIPE10774 A2 ZPIP12976 1.5 0 1 CIRCULAR 0.661 RCP 3.1 3.1 None 0.04 5.0 5.0 None 7.4 7.4 None 8.3 8.3 None PIPE10968 A2 ZPIP11003 1.5 0 1 CIRCULAR 0.159 RCP 0.0 0.0 None 0 0.0 3.5 None 0.0 4.4 None 0.0 4.4 None PIPE11068 A2 ZPIP14628 3 0 1 CIRCULAR 0.012 RCP 2.6 3.0 None 0.04 4.1 4.7 None 6.1 6.2 None 6.9 7.0 None PIPE11148 A2 ZPIP14901 1.5 0 1 CIRCULAR 0.050 RCP 0.0 0.0 None 0 1.1 0.2 None 0.6 0.5 None 0.7 2.5 None CULV10068 A2 ZCUL084D 5.5 0 1 CIRCULAR 0.066 RCP 40.2 41.6 None 0.05 69.9 58.9 None 134.8 84.3 None 158.4 89.4 None PIPE11169 A2 ZPIP15134 2 0 1 CIRCULAR 0.017 RCP 1.1 1.1 None 0.04 1.7 1.7 None 2.6 2.6 None 2.9 2.9 None PIPE11248 A2 ZPIP19006 2.5 0 1 CIRCULAR 0.027 RCP 2.5 2.5 None 0.04 4.0 4.0 None 5.9 5.9 None 6.6 6.6 None PIPE11293 A2 ZPIP11941 2 0 1 CIRCULAR 0.028 HDPE 1.2 1.2 None 0.03 2.1 2.1 None 3.2 3.2 None 3.6 3.6 None PIPE10795 A2 ZPIP10517 2 0 1 CIRCULAR 0.268 RCP 4.2 4.2 None 0.04 6.7 6.7 None 9.8 9.8 None 11.0 11.0 None PIPE10899 A2 ZPIP13708 1.5 0 1 CIRCULAR 0.169 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 3.7 None PIPE11016 A2 ZPIP11070 4 0 1 CIRCULAR 0.444 RCP 21.0 21.0 None 0.02 37.5 37.1 None 59.4 58.4 None 69.0 88.9 None PIPE11103 A2 ZPIP11258 4.5 0 1 CIRCULAR 0.853 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 179.2 None 0.0 160.0 Both Upstream and Downstream PIPE11252 A2 ZPIP15613 1.5 0 1 CIRCULAR 0.054 RCP 0.8 0.8 None 0.03 1.3 1.3 None 2.0 2.0 None 2.2 2.2 None PIPE10879 A2 ZPIP10723 1.5 0 1 CIRCULAR 0.086 HDPE 0.9 0.9 None 0.03 1.5 1.5 None 2.3 2.3 None 2.6 2.6 None PIPE11225 A2 ZPIP11670 1.5 0 1 CIRCULAR 0.013 RCP 1.0 0.9 None 0.07 1.8 0.6 None 3.7 1.1 None 13.7 1.0 None PIPE11249 A2 ZPIP11740 2.5 0 1 CIRCULAR 0.013 RCP 1.4 1.4 None 0.03 2.2 2.2 None 3.3 3.3 None 3.7 3.7 None PIPE11253 A2 ZPIP15624 1.5 0 1 CIRCULAR 0.083 PVC 0.9 0.9 None 0.03 1.4 1.4 None 2.0 2.0 None 2.3 2.3 None PIPE11254 A2 ZPIP15627 1.5 0 1 CIRCULAR 0.067 PVC 0.9 0.9 None 0.03 1.4 1.4 None 2.0 2.0 None 2.3 2.3 None PIPE11462 A2 ZPIP11069 1.5 0 1 CIRCULAR 0.116 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 3.0 None PIPE10712 A2 ZPIP10334 2 0 1 CIRCULAR 0.170 RCP 2.6 2.6 None 0.03 4.0 4.0 None 5.8 5.8 None 6.5 6.5 None PIPE10804 A2 ZPIP13289 1.5 0 1 CIRCULAR 0.661 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 3.7 None 0.0 6.1 None PIPE11003 A2 ZPIP14334 2 0 1 CIRCULAR 0.049 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 3.7 None PIPE11017 A2 ZPIP11071 6 0 1 CIRCULAR 0.037 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 58.0 None PIPE11251 A2 ZPIP11742 1.5 0 1 CIRCULAR 0.010 RCP 0.3 0.3 None 0.03 0.5 0.5 None 0.7 0.7 None 0.8 0.8 None PIPE11257 A2 ZPIP11754 1.5 0 1 CIRCULAR 0.094 RCP 0.9 0.9 None 0.03 1.4 1.4 None 2.0 2.0 None 2.3 2.3 None PIPE11258 A2 ZPIP15641 1.5 0 1 CIRCULAR 0.094 RCP 0.8 0.8 None 0.03 1.4 1.4 None 2.0 2.0 None 2.3 2.3 None CHAN10140 A2 ZCH10061 0 0 1 IRREGULAR 0.006 EARTHEN 338.0 337.7 None 0.02 676.5 675.3 None 1100.0 1094.3 None 1287.9 1292.1 None DTCH10237 A2 BD031 1.5 3 1 PARABOLIC 0.054 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 Downstream 0.0 3.2 Downstream PIPE10694 A2 ZPIP10290 1.5 0 1 CIRCULAR 0.030 RCP 0.7 0.1 None 0.01 0.6 0.1 None 0.8 1.0 None 0.5 0.9 None PIPE10839 A2 ZPIP13464 1.5 0 1 CIRCULAR 0.200 RCP 0.8 0.8 None 0.02 1.4 1.4 None 2.1 2.1 None 2.4 2.4 None PIPE10972 A2 ZPIP17121 1.5 0 1 CIRCULAR 0.075 RCP 0.2 0.3 None 0.01 8.3 0.5 None 4.4 1.2 None 2.5 1.4 None PIPE11028 A2 ZPIP17172 1.5 0 1 CIRCULAR 0.355 RCP 0.7 0.7 None 0.01 1.7 1.7 None 2.7 2.7 None 3.2 3.1 None CHAN10122 A2 ZCH10007 0 0 1 IRREGULAR 0.008 Concrete 344.9 360.0 None 0.02 715.0 708.5 None 842.6 809.1 None 879.8 835.6 None CHAN10123 A2 ZCH10007 0 0 1 IRREGULAR 0.008 Concrete 362.8 370.3 None 0.02 682.7 677.4 None 808.9 777.2 None 862.6 835.4 None CHAN10137 A2 ZCH10061 0 0 1 IRREGULAR 0.030 EARTHEN 338.6 338.3 None 0.01 678.2 677.1 None 1101.5 1096.8 None 1291.0 1422.4 None CHAN10141 A2 ZCH10061 0 0 1 IRREGULAR 0.006 EARTHEN 336.9 336.8 None 0.01 676.5 675.3 None 1099.8 1094.2 None 1287.6 1274.4 None PIPE10933 A2 ZPIP14109 1.5 0 1 CIRCULAR 0.009 RCP 0.1 0.1 None 0.01 0.1 0.1 None 0.2 0.8 None 0.2 0.4 None PIPE10959 A2 ZPIP10993 1.5 0 1 CIRCULAR 0.080 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 1.1 None PIPE11164 A2 ZPIP17279 2 0 1 CIRCULAR 0.007 RCP 6.3 1.4 None 0.07 7.6 0.8 None 7.6 0.8 None 7.2 0.8 None PIPE11200 A2 ZPIP11599 1.5 0 1 CIRCULAR 0.034 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.8 None PIPE11250 A2 ZPIP11741 2.5 0 1 CIRCULAR 0.014 RCP 0.8 0.8 None 0.02 1.3 1.3 None 1.9 1.9 None 2.1 2.1 None CHAN10050 A2 CH004B 0 0 1 IRREGULAR 0.002 Concrete 325.0 319.5 None 0.02 410.1 509.0 None 512.1 578.1 None 544.0 595.2 None CHAN10051 A2 CH004B 0 0 1 IRREGULAR 0.002 Concrete 331.8 322.3 None 0.02 410.1 530.1 None 512.2 590.4 Downstream 544.1 582.8 Downstream DTCH10191 A2 0 0 1 IRREGULAR 0.002 Concrete 35.7 36.6 None 0.01 74.4 75.9 None 122.3 122.5 None 143.4 145.5 None CHAN10113 A2 0 0 1 IRREGULAR 0.001 Earthen 30.5 30.5 None 0.01 58.3 57.3 None 92.7 86.7 None 106.7 99.1 None CHAN10124 A2 ZCH10007 0 0 1 IRREGULAR 0.008 Concrete 414.6 414.5 None 0.02 671.1 672.4 None 811.9 779.9 None 865.3 840.3 None CHAN10139 A2 ZCH10061 0 0 1 IRREGULAR 0.006 EARTHEN 338.5 338.2 None 0.01 677.1 676.0 None 1100.4 1095.2 None 1289.0 1321.3 None CHAN10143 A2 ZCH10061 0 0 1 IRREGULAR 0.006 EARTHEN 334.7 334.4 None 0.01 673.9 672.0 None 1097.6 1092.3 None 1285.0 1262.6 None CHAN10144 A2 ZCH10061 0 0 1 IRREGULAR 0.006 EARTHEN 334.5 334.2 None 0.01 671.8 670.2 None 1097.3 1093.2 None 1284.5 1261.2 None CHAN10153 A2 ZCH10032 0 0 1 IRREGULAR 0.003 Concrete 283.5 282.2 None 0.01 496.8 462.1 None 640.0 628.7 None 692.0 685.5 None CHAN10157 A2 ZCH10032 0 0 1 IRREGULAR 0.006 Concrete 280.7 279.5 None 0.02 687.8 672.6 None 710.6 709.2 None 705.3 698.5 None CHAN10165 A2 ZCH10121 0 0 1 IRREGULAR 0.015 Earthen 270.1 237.6 None 0.02 584.7 280.2 None 737.9 465.5 None 817.4 554.8 None CHAN10188 A2 0 0 1 IRREGULAR 0.020 Concrete 72.9 73.5 None 0.01 155.0 155.6 None 248.3 248.3 Upstream 293.2 293.6 Upstream CHAN10784 A2 0 0 1 IRREGULAR 0.012 EARTHEN 0.0 23.8 None 0.01 0.0 41.2 None 0.0 62.0 Downstream 67.1 66.5 Downstream PIPE10877 A2 ZPIP10721 2 0 1 CIRCULAR 0.058 HDPE 0.5 0.5 None 0.01 1.0 1.0 None 1.6 1.6 None 1.8 1.8 None PIPE11074 A2 ZPIP17220 3.5 0 1 CIRCULAR 0.011 RCP 0.0 0.2 None 0 0.3 0.6 None 0.7 1.9 None 0.9 3.1 None PIPE11478 A2 ZPIP11005 2 0 1 CIRCULAR 0.045 RCP 0.0 0.0 None 0 3.7 0.7 None 73.0 1.9 None 92.1 1.2 None DTCH10179 A2 0 0 1 IRREGULAR 0.018 Concrete 59.6 55.0 None 0.01 97.6 78.6 None 151.1 106.1 None 172.0 119.0 None CHAN10112 A2 0 0 1 IRREGULAR 0.002 Earthen 48.6 48.5 None 0.01 85.9 83.9 None 128.7 116.9 None 142.8 124.3 None CHAN10119 A2 ZCH10007 0 0 1 IRREGULAR 0.008 Concrete 313.4 317.4 None 0.01 729.2 736.9 None 844.5 814.9 None 882.2 836.3 None CHAN10120 A2 ZCH10007 0 0 1 IRREGULAR 0.008 Concrete 313.3 317.0 None 0.01 720.4 725.3 None 839.1 809.1 None 879.5 836.1 None CHAN10189 A2 0 0 1 IRREGULAR 0.026 Concrete 72.9 73.5 None 0.01 155.0 155.5 None 248.2 248.3 None 293.2 293.6 None DTCH10240 A2 0 0 1 IRREGULAR 0.018 EARTHEN 43.9 44.1 None 0.01 72.7 72.2 None 116.4 110.0 None 127.2 119.9 None PIPE10687 A2 ZPIP16776 1.5 0 1 CIRCULAR 0.009 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.2 None 0.0 0.2 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 23 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE11022 A2 ZPIP17163 4 0 1 CIRCULAR 0.001 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 1.0 None PIPE11099 A2 ZPIP14706 1.5 0 1 CIRCULAR 0.259 ACP 0.0 0.0 None 0 0.0 0.3 None 0.3 0.6 None 0.4 0.8 Downstream PIPE11292 A2 ZPIP11940 2 0 1 CIRCULAR 0.414 HDPE 1.2 1.2 None 0.01 2.1 2.1 None 3.2 3.2 None 3.6 3.6 None PIPE11354 A2 ZPIP12227 1.5 0 1 CIRCULAR 0.323 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.5 Downstream 0.0 1.0 Downstream CHAN10043 A2 ZCH10099 0 0 1 IRREGULAR 0.003 Concrete 282.3 281.2 None 0.01 885.6 901.9 Upstream 874.6 901.6 Upstream 882.6 906.0 Upstream CHAN10044 A2 ZCH10099 0 0 1 IRREGULAR 0.003 Concrete 282.3 281.2 None 0.01 845.7 865.6 None 833.3 865.3 None 842.1 868.6 None CHAN10079 A2 CH027E 0 0 1 IRREGULAR 0.004 Concrete 259.6 265.0 None 0.01 440.4 429.8 None 661.5 549.0 None 753.0 571.0 None CHAN10080 A2 CH027E 0 0 1 IRREGULAR 0.004 Concrete 255.3 260.0 None 0.01 434.5 422.9 None 650.5 546.5 None 741.3 569.9 None DTCH10193 A2 CH026 0 0 1 IRREGULAR 0.014 Concrete 40.1 43.6 None 0 81.9 83.3 None 133.0 303.2 Upstream 155.4 296.6 Upstream CHAN10114 A2 0 0 1 IRREGULAR 0.001 Earthen 21.3 21.3 None 0 44.5 44.6 None 73.7 73.4 None 89.1 89.3 None CHAN10121 A2 ZCH10007 0 0 1 IRREGULAR 0.008 Concrete 312.8 315.2 None 0.01 710.5 710.8 None 834.7 805.1 None 877.3 835.9 None CHAN10130 A2 0 0 1 IRREGULAR 0.023 Concrete 25.0 25.1 None 0.01 50.3 50.1 None 73.2 74.1 None 81.1 83.6 None CHAN10142 A2 ZCH10061 0 0 1 IRREGULAR 0.006 EARTHEN 335.5 335.4 None 0.01 675.4 673.8 None 1098.5 1092.8 None 1286.0 1266.9 None CHAN10145 A2 ZCH10061 0 0 1 IRREGULAR 0.030 EARTHEN 334.5 334.2 None 0 672.3 670.3 None 1098.0 1093.1 None 1285.6 1264.4 Downstream CHAN10150 A2 ZCH10076 0 0 1 IRREGULAR 0.014 EARTHEN 79.3 79.3 None 0.01 138.8 138.7 None 215.1 215.0 None 251.1 251.1 None CHAN10152 A2 ZCH10032 0 0 1 IRREGULAR 0.009 Concrete 284.7 282.7 None 0.01 497.3 463.9 Upstream 640.2 628.9 Upstream 692.2 685.6 Upstream CHAN10154 A2 ZCH10032 0 0 1 IRREGULAR 0.009 Concrete 283.2 281.7 None 0.01 496.9 461.0 None 639.8 628.6 None 692.0 685.6 None CHAN10156 A2 ZCH10032 0 0 1 IRREGULAR 0.006 Concrete 287.9 286.6 None 0.01 508.4 472.4 None 652.6 641.1 None 707.6 699.8 None CHAN10158 A2 ZCH10032 0 0 1 IRREGULAR 0.020 Concrete 275.1 273.3 Downstream 0.01 869.9 878.9 Downstream 848.1 872.9 Downstream 835.4 857.9 Downstream CHAN10167 A2 ZCH10121 0 0 1 IRREGULAR 0.075 Earthen 266.1 232.0 None 0.01 377.6 279.7 None 725.0 356.1 None 762.7 369.7 None CHAN10178 A2 0 0 1 IRREGULAR 0.005 Concrete 96.3 96.8 None 0 200.9 201.5 None 320.0 320.2 None 376.6 377.5 None FLOW10014 A2 4 15 1 TRAPEZOIDAL 0.028 RCP 18.7 18.8 None 0 30.3 34.2 None 43.4 53.1 None 48.0 61.0 None CHAN10192 A2 ZCH10121 0 0 1 IRREGULAR 0.029 Earthen 326.8 288.8 None 0.02 464.4 301.0 None 681.8 342.1 None 776.5 373.3 None PIPE10806 A2 ZPIP16924 1.5 0 1 CIRCULAR 0.029 RCP 0.0 0.0 None 0 0.0 0.0 None 0.1 0.2 None 0.1 0.2 None PIPE10807 A2 ZPIP16925 1.5 0 1 CIRCULAR 0.009 RCP 0.0 0.0 None 0 0.1 0.1 None 0.1 0.1 None 0.1 0.1 None PIPE10866 A2 ZPIP17011 1.5 0 1 CIRCULAR 0.010 RCP 0.0 0.0 None 0 0.1 0.0 None 0.1 0.1 None 0.1 0.1 None PIPE10919 A2 ZPIP13823 1.5 0 1 CIRCULAR 0.010 CMP 0.0 0.0 None 0.01 0.1 0.1 None 0.1 0.1 None 0.1 0.1 None PIPE11043 A2 ZPIP14434A 1.5 0 1 CIRCULAR 0.083 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.2 None PIPE11066 A2 ZPIP11200 1.5 0 1 CIRCULAR 0.018 HDPE 0.0 0.0 None 0 0.0 0.0 None 0.1 0.1 None 0.1 0.1 None PIPE11075 A2 ZPIP11220 3.5 0 1 CIRCULAR 0.007 RCP 0.0 0.0 None 0 0.0 0.2 None 0.0 0.8 None 0.0 1.1 None PIPE11119 A2 ZPIP14832 1.5 0 1 CIRCULAR 0.348 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.7 Downstream 0.0 0.6 Downstream PIPE11180 A2 ZPIP11494 1.5 0 1 CIRCULAR 0.005 RCP 0.0 0.0 None 0 0.0 0.0 None 0.1 0.1 None 0.1 0.1 None PIPE11235 A2 ZPIP17483 1.5 0 1 CIRCULAR 0.013 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.1 None 0.0 0.1 None PIPE11395 A2 ZPIP11368 1.833 1.083 1 ARCH 0.010 CMP 0.5 0.1 None 0.02 0.3 0.1 None 0.4 0.1 None 0.5 0.1 None PIPE11442 A2 ZPIP14263 2 0 1 CIRCULAR 0.006 ABS 0.0 0.1 None 0 0.1 0.1 None 0.1 0.1 None 0.1 0.2 None PIPE11472 A2 ZPIP16674 2 0 1 CIRCULAR 0.094 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.4 None 0.0 0.7 None CHAN10024 A2 CH004A 0 0 1 IRREGULAR 0.002 Concrete 315.2 285.7 None 0.01 410.2 482.9 None 512.3 566.9 Upstream 544.3 561.6 Upstream CHAN10025 A2 CH004A 0 0 1 IRREGULAR 0.002 Concrete 309.5 273.6 None 0.01 410.4 454.7 None 512.5 541.6 Downstream 544.7 550.1 Downstream CHAN10026 A2 CH027A 0 0 1 IRREGULAR 0.015 Concrete 257.8 264.2 None 0 656.4 571.3 None 666.5 556.5 None 734.9 580.9 None CHAN10027 A2 CH027A 0 0 1 IRREGULAR 0.016 Concrete 257.8 264.3 None 0 677.4 547.6 None 694.1 556.6 None 734.9 580.8 None DTCH10117 A2 DD028 0 0 1 IRREGULAR 0.010 Earthen 0.0 0.0 None 0 9.1 44.8 None 22.5 50.3 None 17.7 45.9 None DTCH10118 A2 DD028 0 0 1 IRREGULAR 0.012 Earthen 0.0 0.0 None 0 30.1 77.1 None 56.5 91.0 None 51.3 87.4 None CHAN10029 A2 ZCH004A 0 0 1 IRREGULAR 0.004 Concrete 291.8 285.1 None 0 503.8 471.5 None 641.2 630.1 None 693.6 686.4 None CHAN10031 A2 ZCH004A 0 0 1 IRREGULAR 0.010 Concrete 283.4 280.8 None 0 494.3 460.4 Downstream 634.8 624.0 Downstream 685.9 680.1 Downstream CHAN10032 A2 ZCH10115 0 0 1 IRREGULAR 0.014 Concrete 131.0 132.9 None 0 376.6 435.1 None 493.1 551.2 None 518.5 544.3 Upstream CHAN10033 A2 ZCH10115 0 0 1 IRREGULAR 0.014 Concrete 132.7 133.4 None 0 518.3 486.5 Downstream 581.2 561.4 Downstream 544.9 563.0 Downstream CHAN10035 A2 ZCH10055 0 0 1 IRREGULAR 0.011 Concrete 120.0 113.3 None 0 191.4 173.1 None 280.3 214.1 None 299.1 230.6 None DTCH10124 A2 ZDD10025 0 0 1 IRREGULAR 0.147 Unknown 0.8 1.2 None 0 2.1 2.8 None 3.6 49.9 None 4.3 105.6 Downstream CHAN10046 A2 ZCH10126 0 0 1 IRREGULAR 0.001 Concrete 113.1 106.8 None 0 176.6 162.9 None 264.3 197.1 None 291.0 207.1 None CHAN10048 A2 ZCH004B 0 0 1 IRREGULAR 0.004 Concrete 299.9 284.1 None 0 472.3 476.4 None 589.1 614.1 Upstream 634.3 631.2 Upstream CHAN10049 A2 ZCH004B 0 0 1 IRREGULAR 0.003 Concrete 291.1 271.0 None 0 470.2 446.5 None 587.4 597.1 Downstream 632.2 630.2 Downstream CHAN10062 A2 ZCH10056A 0 0 1 IRREGULAR 0.013 EARTHEN 13.5 13.7 None 0 21.6 22.0 None 32.4 32.9 None 37.1 37.4 None CHAN10063 A2 ZCH10056A 0 0 1 IRREGULAR 0.004 EARTHEN 12.0 12.1 None 0 18.8 19.0 None 28.5 28.8 None 32.7 33.1 None CHAN10072 A2 ZCH10096B 0 0 1 IRREGULAR 0.009 EARTHEN 91.1 90.7 None 0 125.6 127.8 None 169.5 170.5 None 185.8 186.1 None CHAN10077 A2 CH027E 0 0 1 IRREGULAR 0.009 Concrete 272.4 279.3 None 0 448.8 446.1 Upstream 678.3 553.9 Upstream 766.6 573.2 Upstream CHAN10078 A2 CH027E 0 0 1 IRREGULAR 0.004 Concrete 267.3 273.4 None 0.01 446.0 438.8 None 672.5 551.9 None 762.3 572.4 None CHAN10081 A2 CH027E 0 0 1 IRREGULAR 0.009 Concrete 253.9 258.1 None 0 433.0 420.1 None 639.7 543.6 None 719.0 568.7 None DTCH10151 A2 BD005A 0 0 1 IRREGULAR 0.009 Unknown 9.5 9.5 None 0 17.1 17.0 None 26.2 26.4 None 30.1 30.4 None DTCH10167 A2 0 0 1 IRREGULAR 0.008 Concrete 63.2 59.0 None 0 104.2 84.9 None 160.1 115.2 None 183.1 128.9 None DTCH10168 A2 0 0 1 IRREGULAR 0.008 Concrete 62.9 59.8 None 0 103.2 84.5 None 156.8 114.0 None 178.5 127.7 None DTCH10177 A2 0 0 1 IRREGULAR 0.036 Concrete 59.2 54.9 None 0 97.9 78.6 None 151.4 106.2 None 172.3 119.2 None DTCH10178 A2 0 0 1 IRREGULAR 0.018 Concrete 59.7 55.1 None 0.01 98.0 78.7 None 151.6 106.3 None 172.4 119.2 None DTCH10180 A2 0 0 1 IRREGULAR 0.036 Concrete 59.2 54.9 None 0 97.4 78.4 None 150.7 106.1 None 171.6 118.9 None CHAN10099 A2 0 0 1 IRREGULAR 0.044 Concrete 96.4 96.9 None 0 201.2 201.8 None 320.9 321.0 None 377.7 378.7 None CHAN10103 A2 CH040A 0 0 1 IRREGULAR 0.004 Earthen 20.5 20.6 None 0 41.3 41.5 None 64.8 63.4 None 73.5 73.7 None CHAN10106 A2 0 0 1 IRREGULAR 0.019 Concrete 100.0 100.5 None 0 208.6 209.2 None 333.3 333.5 None 392.1 393.0 None DTCH10185 A2 DD003 0 0 1 IRREGULAR 0.036 Unknown 25.0 25.0 None 0 42.7 41.9 None 64.8 61.9 None 73.8 68.4 None DTCH10190 A2 0 0 1 IRREGULAR 0.055 Concrete 35.8 36.6 None 0 74.5 76.0 None 122.9 123.3 None 144.0 146.1 None DTCH10192 A2 0 0 1 IRREGULAR 0.055 Concrete 35.7 36.6 None 0 74.4 75.9 None 122.0 122.5 None 143.0 175.0 None DTCH10194 A2 CH026 0 0 1 IRREGULAR 0.034 Concrete 40.2 43.6 None 0 81.9 83.3 None 133.0 237.2 Downstream 155.4 211.3 Downstream DTCH10195 A2 ZPIP12196 0 0 1 IRREGULAR 0.018 RCP 29.7 30.1 None 0 51.5 50.9 None 76.9 75.5 None 88.5 86.6 None DTCH10196 A2 ZPIP12196 0 0 1 IRREGULAR 0.007 RCP 29.7 29.9 None 0 51.4 51.4 None 75.4 74.6 None 87.7 87.7 None CHAN10110 A2 0 0 1 IRREGULAR 0.015 Concrete 95.6 96.2 None 0 199.4 200.0 None 315.8 316.0 None 371.1 372.0 None CHAN10111 A2 0 0 1 IRREGULAR 0.010 Concrete 95.6 96.2 None 0 199.3 200.0 None 315.8 316.0 None 371.0 372.0 None CHAN10118 A2 ZCH10007 0 0 1 IRREGULAR 0.052 Concrete 313.5 317.2 None 0 734.9 750.3 None 847.1 817.1 None 883.6 836.5 None CHAN10125 A2 ZCH10007 0 0 1 IRREGULAR 0.052 Concrete 378.8 392.6 Downstream 0.01 646.9 635.6 Downstream 894.5 881.6 Downstream 916.0 920.6 Downstream

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 24 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
DTCH10205 A2 DD005 0 0 1 IRREGULAR 0.046 Concrete 23.9 24.1 None 0 42.8 42.7 None 65.4 59.2 None 74.9 69.3 None DTCH10206 A2 DD005 0 0 1 IRREGULAR 0.019 Concrete 23.7 23.9 None 0 42.3 42.2 None 63.8 58.6 None 74.4 67.1 None CHAN10129 A2 0 0 1 IRREGULAR 0.021 Concrete 26.8 27.1 None 0 54.8 54.4 None 76.7 78.0 None 84.2 87.2 None CHAN10132 A2 0 0 1 IRREGULAR 0.021 Concrete 17.4 17.5 None 0 35.2 35.3 None 55.7 55.4 None 65.3 65.4 None CHAN10149 A2 ZCH10076 0 0 1 IRREGULAR 0.014 EARTHEN 84.4 84.4 None 0 146.3 146.3 None 230.6 230.6 None 269.6 269.6 None DTCH10226 A2 0 0 1 IRREGULAR 0.032 EARTHEN 97.7 98.5 None 0 160.2 125.2 Upstream 192.0 149.7 Upstream 207.8 157.2 Upstream DTCH10227 A2 0 0 1 IRREGULAR 0.015 EARTHEN 97.6 91.0 None 0.01 147.0 105.1 None 172.9 122.7 None 186.7 128.2 None DTCH10228 A2 0 0 1 IRREGULAR 0.032 EARTHEN 94.4 77.3 Downstream 0 134.9 87.5 Downstream 163.7 96.8 Downstream 175.1 100.3 Downstream CHAN10155 A2 ZCH10032 0 0 1 IRREGULAR 0.020 Concrete 288.1 287.0 None 0 506.1 470.3 None 652.9 641.0 None 707.2 699.5 None CHAN10166 A2 ZCH10121 0 0 1 IRREGULAR 0.018 Earthen 266.2 232.4 None 0.01 377.8 279.7 None 755.4 358.5 None 896.6 372.4 None CHAN10171 A2 0 0 1 IRREGULAR 0.017 Concrete 95.8 96.3 None 0 199.7 200.4 None 316.6 316.8 None 372.0 373.0 None CHAN10172 A2 0 0 1 IRREGULAR 0.006 Concrete 95.7 96.2 None 0 199.7 200.4 None 316.7 316.9 None 372.0 373.0 None CHAN10173 A2 0 0 1 IRREGULAR 0.015 Concrete 95.7 96.2 None 0 199.6 200.3 None 316.6 316.8 None 371.9 372.8 None CHAN10175 A2 0 0 1 IRREGULAR 0.004 Concrete 96.6 97.1 None 0 201.8 202.4 None 320.8 321.0 None 376.7 377.7 None CHAN10177 A2 0 0 1 IRREGULAR 0.029 Concrete 96.7 97.3 None 0 202.1 202.7 None 321.1 321.3 None 377.3 378.3 None DTCH10241 A2 0 0 1 IRREGULAR 0.018 EARTHEN 43.5 43.6 None 0.01 72.8 70.8 None 119.5 109.6 None 127.6 121.2 None DTCH10242 A2 0 0 1 IRREGULAR 0.018 EARTHEN 43.2 43.3 None 0 72.1 72.8 None 98.6 108.1 None 108.6 116.6 None CHAN10190 A2 ZPIP17822 0 0 1 IRREGULAR 0.002 RCP 64.3 61.1 None 0 134.3 151.4 None 141.1 141.4 None 181.9 140.5 None PIPE10728 A2 ZPIP10338 1.5 0 1 CIRCULAR 0.015 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10729 A2 ZPIP10339 1.5 0 1 CIRCULAR 0.124 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10772 A2 ZPIP12974 1 0 1 CIRCULAR 0.593 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 Downstream 0.0 0.0 Downstream PIPE10782 A2 ZPIP13260 2.25 0 1 CIRCULAR 0.008 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10799 A2 ZPIP13287 1.5 0 1 CIRCULAR 0.158 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10813 A2 ZPIP16934 1.5 0 1 CIRCULAR 0.022 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10814 A2 ZPIP16935 1.5 0 1 CIRCULAR 0.022 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10819 A2 ZPIP13431 1.5 0 1 CIRCULAR 0.027 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10843 A2 ZPIP13468 1.5 0 1 CIRCULAR 0.438 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10872 A2 ZPIP13667 1.5 0 1 CIRCULAR 0.026 RCP 0.0 0.0 None 0 0.4 0.0 None 1.2 0.0 None 1.6 0.0 None PIPE10873 A2 ZPIP13668 1.5 0 1 CIRCULAR 0.044 HDPE 0.0 0.0 None 0 0.1 0.0 None 0.4 0.0 None 0.8 0.0 None PIPE10874 A2 ZPIP13669 0 0 1 DUMMY 0.023 RCP 14.3 23.1 None 0 20.0 41.6 None 28.2 64.3 None 35.1 73.7 None PIPE10878 A2 ZPIP10722 1.5 0 1 CIRCULAR 0.102 HDPE 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10883 A2 ZPIP13688 1.5 0 1 CIRCULAR 0.047 HDPE 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10890 A2 ZPIP13701 1.5 0 1 CIRCULAR 0.234 HDPE 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10893 A2 ZPIP13705 2.5 0 1 CIRCULAR 0.152 HDPE 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10896 A2 ZPIP10740 1.5 0 1 CIRCULAR 0.007 HDPE 0.2 0.0 None 0 1.4 0.0 None 3.0 0.0 None 3.3 0.0 None PIPE10901 A2 ZPIP13710 2 0 1 CIRCULAR 0.175 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10905 A2 ZPIP13737 1.5 0 1 CIRCULAR 0.013 HDPE 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10906 A2 ZPIP13748 2 0 1 CIRCULAR 0.056 HDPE 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10908 A2 ZPIP13751 1.5 0 1 CIRCULAR 0.014 HDPE 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10912 A2 ZPIP13758 2.25 0 1 CIRCULAR 0.075 Unknown 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10915 A2 ZPIP13813 1.5 0 1 CIRCULAR 0.011 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10916 A2 ZPIP13814 1.5 0 1 CIRCULAR 0.049 CMP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10945 A2 ZPIP10970 1.5 0 1 CIRCULAR 0.144 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10946 A2 ZPIP10971 1.5 0 1 CIRCULAR 0.036 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10947 A2 ZPIP14153 1.5 0 1 CIRCULAR 0.036 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10953 A2 ZPIP14160 1.5 0 1 CIRCULAR 0.027 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10954 A2 ZPIP17105 2 0 1 CIRCULAR 0.094 ACP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10955 A2 ZPIP10986 2 0 1 CIRCULAR 0.010 ACP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10957 A2 ZPIP17107 1.5 0 1 CIRCULAR 0.039 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10958 A2 ZPIP10992 1.5 0 1 CIRCULAR 1.179 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10973 A2 ZPIP17122 1.5 0 1 CIRCULAR 0.009 RCP 0.0 0.1 None 0 0.1 0.1 None 0.3 0.1 None 0.2 0.0 None PIPE10977 A2 ZPIP11023 2 0 1 CIRCULAR 0.009 Unknown 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10979 A2 ZPIP14255 2.5 0 1 CIRCULAR 0.055 Unknown 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10990 A2 ZPIP14292 2 0 1 CIRCULAR 0.033 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10992 A2 ZPIP17135 1.5 0 1 CIRCULAR 0.363 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10993 A2 ZPIP17136 2 0 1 CIRCULAR 0.219 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE10996 A2 ZPIP14312 1.5 0 1 CIRCULAR 0.038 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11013 A2 ZPIP11065 2 0 1 CIRCULAR 0.069 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11019 A2 ZPIP14354 1.5 0 1 CIRCULAR 0.186 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11020 A2 ZPIP14355 1.5 0 1 CIRCULAR 0.074 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 1.5 0.0 None PIPE11023 A2 ZPIP11090 1.5 0 1 CIRCULAR 0.023 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11025 A2 ZPIP14419 1.5 0 1 CIRCULAR 0.442 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11042 A2 ZPIP14433 1.5 0 1 CIRCULAR 0.783 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11045 A2 ZPIP11110 1.5 0 1 CIRCULAR 0.262 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11049 A2 ZPIP14438 2 0 1 CIRCULAR 0.027 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11050 A2 ZPIP14439 1.5 0 1 CIRCULAR 0.051 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11054 A2 ZPIP11113 1.5 0 1 CIRCULAR 0.032 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11055 A2 ZPIP11114 2 0 1 CIRCULAR 0.034 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11063 A2 ZPIP17196 1.5 0 1 CIRCULAR 0.011 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.1 None PIPE11065 A2 ZPIP11199 1.5 0 1 CIRCULAR 0.019 HDPE 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11067 A2 ZPIP14598 1.5 0 1 CIRCULAR 0.036 HDPE 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11069 A2 ZPIP14630 1.5 0 1 CIRCULAR 0.376 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11078 A2 ZPIP11231 1.5 0 1 CIRCULAR 0.016 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11094 A2 ZPIP14674 1.5 0 1 CIRCULAR 0.034 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11100 A2 ZPIP14707 1.5 0 1 CIRCULAR 0.413 ACP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 Downstream PIPE11126 A2 ZPIP11329 1.5 0 1 CIRCULAR 0.058 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 25 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE11130 A2 ZPIP14840 1.5 0 1 CIRCULAR 0.013 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.1 0.1 None PIPE11134 A2 ZPIP11332 2 0 1 CIRCULAR 0.010 RCP 0.1 0.0 None 0 0.1 0.0 None 0.3 0.1 None 0.4 0.1 None PIPE11136 A2 ZPIP14844 1.5 0 1 CIRCULAR 0.009 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11137 A2 ZPIP14845 2 0 1 CIRCULAR 0.009 Unknown 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11145 A2 ZPIP14900 1.5 0 1 CIRCULAR 0.049 RCP 0.1 0.0 None 0 0.2 0.1 None 0.1 0.0 None 0.1 0.0 None PIPE11179 A2 ZPIP11493 1.5 0 1 CIRCULAR 0.006 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11199 A2 ZPIP17426 1.5 0 1 CIRCULAR 0.007 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11207 A2 ZPIP15413 1.5 0 1 CIRCULAR 0.010 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11208 A2 ZPIP17463 1.5 0 1 CIRCULAR 0.134 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11210 A2 ZPIP17465 1.5 0 1 CIRCULAR 0.009 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11211 A2 ZPIP11642 2 0 1 CIRCULAR 0.012 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11212 A2 ZPIP11643 1.5 0 1 CIRCULAR 0.115 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11213 A2 ZPIP11644 1.5 0 1 CIRCULAR 0.017 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11214 A2 ZPIP15417 2 0 1 CIRCULAR 0.105 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11215 A2 ZPIP15418 2 0 1 CIRCULAR 0.010 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11216 A2 ZPIP15419 1.5 0 1 CIRCULAR 0.054 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11217 A2 ZPIP15420 4 0 1 CIRCULAR 0.012 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11218 A2 ZPIP15421 1.5 0 1 CIRCULAR 0.030 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11219 A2 ZPIP15422 2 0 1 CIRCULAR 0.014 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11220 A2 ZPIP15423 3.5 0 1 CIRCULAR 0.105 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11221 A2 ZPIP15424 1.75 0 1 CIRCULAR 0.010 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11228 A2 ZPIP11685 1.5 0 1 CIRCULAR 0.119 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11229 A2 ZPIP11686 1.5 0 1 CIRCULAR 0.063 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11234 A2 ZPIP15508 5 0 1 CIRCULAR 0.015 RCP 0.0 0.0 None 0 0.0 0.1 None 0.1 0.1 None 0.1 0.1 None PIPE11270 A2 ZPIP15884 1.5 0 1 CIRCULAR 0.046 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11275 A2 ZPIP15917 1.25 0 1 CIRCULAR 0.057 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11276 A2 ZPIP17597 2 0 1 CIRCULAR 0.036 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11315 A2 ZPIP17642 1.5 0 1 CIRCULAR 0.952 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11317 A2 ZPIP11960 1.5 0 1 CIRCULAR 0.290 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11323 A2 ZPIP17643 1.5 0 1 CIRCULAR 0.187 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11330 A2 ZPIP16065 1.5 0 1 CIRCULAR 0.056 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11332 A2 ZPIP16067 2 0 1 CIRCULAR 0.058 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11335 A2 ZPIP16134 1.5 0 1 CIRCULAR 0.043 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11342 A2 ZPIP12191 0 0 1 DUMMY 0.002 RCP 11.5 11.7 None 0 18.6 18.9 None 28.0 28.1 None 31.9 32.0 None PIPE11343 A2 ZPIP12192 0 0 1 DUMMY 0.038 RCP 0.1 0.0 None 0 0.2 0.0 None 0.2 0.0 None 0.2 0.0 None PIPE11344 A2 ZPIP16475 0 0 1 DUMMY 0.009 RCP 14.8 15.5 None 0 26.9 25.8 None 43.4 36.4 None 49.8 40.8 None PIPE11348 A2 ZPIP16480 0 0 1 DUMMY 0.019 RCP 7.3 9.7 None 0 11.2 15.5 None 16.4 22.1 None 22.3 25.2 None PIPE11349 A2 ZPIP17826 0 0 1 DUMMY 0.002 RCP 54.4 53.4 None 0 85.9 81.1 Downstream 120.3 108.7 Downstream 133.4 116.9 Downstream PIPE11350 A2 ZPIP16503 0 0 1 DUMMY 0.002 Earthen 43.1 43.1 None 0 84.7 64.2 None 131.5 82.2 None 152.5 90.5 None PIPE11366 A2 PIP19015 6.5 0 1 CIRCULAR 0.013 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.5 None 0.0 0.4 None PIPE11377 A2 PIP19117 1.5 0 1 CIRCULAR 1.083 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11378 A2 ZPIP18013 1.5 0 1 CIRCULAR 0.070 HDPE 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11379 A2 ZPIP18014 2 0 1 CIRCULAR 0.003 HDPE 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11380 A2 ZPIP18016 1.5 0 1 CIRCULAR 0.037 HDPE 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11382 A2 ZPIP18020 1 0 1 CIRCULAR 0.035 HDPE 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11389 A2 ZPIP14434B 1.5 0 1 CIRCULAR 0.083 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None FLOW10008 A2 0 0 1 DUMMY 0.016 RCP 28.5 29.3 Downstream 0 50.2 52.8 Downstream 70.6 73.9 Downstream 78.2 82.3 Downstream FLOW10009 A2 0 0 1 DUMMY 0.012 RCP 12.7 12.9 None 0 20.1 20.4 None 29.0 29.9 None 32.8 33.7 None PIPE11448 A2 ZPIP11947 2 0 1 CIRCULAR 0.020 RCP 0.1 0.1 None 0 0.1 0.1 None 0.2 0.1 None 0.2 0.1 None PIPE11450 A2 ZPIP11105 1.5 0 1 CIRCULAR 0.137 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11451 A2 ZPIP11104 1.5 0 1 CIRCULAR 0.029 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11452 A2 ZPIP11103 1.5 0 1 CIRCULAR 0.088 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11454 A2 ZPIP12229 0 0 1 DUMMY 0.107 RCP 0.7 0.7 None 0 1.7 1.7 None 2.7 2.7 None 3.1 3.1 None PIPE11469 A2 ZPIP14356 1.5 0 1 CIRCULAR 0.117 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11470 A2 ZPIP14357 1.5 0 1 CIRCULAR 0.043 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11471 A2 ZPIP16673 1.5 0 1 CIRCULAR 0.016 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11490 A2 0 0 1 DUMMY 0.061 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11491 A2 0 0 1 DUMMY 0.065 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11492 A2 0 0 1 DUMMY -0.020 RCP 4.7 5.6 None 0 7.9 8.8 None 11.6 21.4 Downstream 13.2 22.4 Downstream PIPE11493 A2 0 0 1 DUMMY 0.333 RCP 95.2 76.3 None 0 161.5 87.3 None 167.1 97.0 Downstream 182.6 100.6 Downstream CHAN10014 A2 ZCH10093 0 0 1 IRREGULAR 0.010 EARTHEN 3.2 2.2 None 0 4.9 2.0 None 7.0 6.8 None 7.9 6.6 None CHAN10015 A2 ZCH10093 0 0 1 IRREGULAR 0.010 EARTHEN 2.5 1.6 None 0 3.9 4.8 None 4.9 10.2 None 5.2 9.9 Downstream CHAN10016 A2 ZCH10094 0 0 1 IRREGULAR 0.006 EARTHEN 26.4 17.9 None 0 47.0 23.0 Upstream 84.0 28.2 Upstream 96.2 30.9 Upstream CHAN10017 A2 ZCH10094 0 0 1 IRREGULAR 0.006 EARTHEN 26.2 20.3 None 0 46.3 18.5 Downstream 82.8 22.5 Downstream 94.2 24.1 Downstream CHAN10018 A2 ZCH10144 0 0 1 IRREGULAR 0.029 EARTHEN 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None CHAN10019 A2 ZCH10144 0 0 1 IRREGULAR 0.008 EARTHEN 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None CHAN10020 A2 ZCH10144 0 0 1 IRREGULAR 0.008 EARTHEN 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None CHAN10021 A2 ZCH10144 0 0 1 IRREGULAR 0.008 EARTHEN 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None CHAN10022 A2 ZCH10144 0 0 1 IRREGULAR 0.008 EARTHEN 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None CHAN10023 A2 ZCH10144 0 0 1 IRREGULAR 0.029 EARTHEN 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10112 A2 ZDD10009 0 0 1 IRREGULAR 0.077 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10113 A2 ZDD10009 0 0 1 IRREGULAR 0.023 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10114 A2 ZDD10009 0 0 1 IRREGULAR 0.023 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10115 A2 ZDD10009 0 0 1 IRREGULAR 0.077 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10116 A2 DD028 0 0 1 IRREGULAR 0.037 Earthen 0.0 0.0 None 0 0.0 7.8 None 0.0 11.1 None 0.0 10.2 None DTCH10119 A2 DD028 0 0 1 IRREGULAR 0.043 Earthen 3.4 3.6 None 0 44.8 96.9 None 72.9 113.5 None 69.7 106.3 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 26 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
DTCH10120 A2 BD003 0 0 1 IRREGULAR 0.063 Concrete 7.4 7.4 None 0 13.1 13.1 None 19.8 19.8 None 22.6 22.6 None DTCH10121 A2 BD003 0 0 1 IRREGULAR 0.008 Concrete 6.6 6.6 None 0 12.2 12.2 None 18.8 18.8 None 21.5 21.6 None DTCH10122 A2 BD003 0 0 1 IRREGULAR 0.008 Concrete 7.1 7.1 None 0 11.3 11.7 None 17.4 17.5 None 20.0 20.1 None DTCH10123 A2 BD003 0 0 1 IRREGULAR 0.063 Concrete 6.5 6.7 None 0 11.0 11.4 None 17.0 17.2 None 19.7 19.7 None CHAN10028 A2 ZCH004A 0 0 1 IRREGULAR 0.011 Concrete 300.6 287.5 None 0 509.1 481.1 None 646.5 647.9 Upstream 700.4 692.9 Upstream CHAN10030 A2 ZCH004A 0 0 1 IRREGULAR 0.004 Concrete 285.8 281.9 None 0 496.9 465.5 None 635.7 624.6 None 686.8 680.4 None CHAN10034 A2 ZCH10055 0 0 1 IRREGULAR 0.032 Concrete 120.0 113.4 None 0 191.0 174.0 None 285.8 211.4 None 315.6 223.0 None CHAN10036 A2 ZCH10055 0 0 1 IRREGULAR 0.032 Concrete 119.9 113.3 Downstream 0 190.8 181.0 Downstream 250.9 236.0 Downstream 272.0 264.4 Downstream CHAN10037 A2 ZCH022 0 0 1 IRREGULAR 0.079 Concrete 81.1 81.0 None 0 158.2 157.5 None 247.3 246.7 None 285.1 271.4 None CHAN10038 A2 ZCH022 0 0 1 IRREGULAR 0.012 Concrete 81.2 81.1 None 0 159.0 158.7 None 245.9 242.8 None 283.3 269.9 None CHAN10039 A2 ZCH022 0 0 1 IRREGULAR 0.012 Concrete 80.1 80.1 None 0 156.4 156.3 None 245.0 242.3 None 283.8 271.5 None CHAN10040 A2 ZCH022 0 0 1 IRREGULAR 0.011 Concrete 64.7 64.7 None 0 135.0 135.0 None 215.1 213.8 None 251.8 243.7 None CHAN10041 A2 ZCH022 0 0 1 IRREGULAR 0.014 Concrete 50.8 50.8 None 0 125.0 125.0 None 205.3 205.0 None 242.4 235.8 None CHAN10042 A2 ZCH022 0 0 1 IRREGULAR 0.082 Concrete 50.7 50.7 None 0 124.7 124.7 None 204.9 204.7 None 242.0 235.5 None DTCH10125 A2 ZDD10027 0 0 1 IRREGULAR 0.161 Unknown 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10126 A2 ZDD10027 0 0 1 IRREGULAR 0.050 Unknown 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10127 A2 ZDD10027 0 0 1 IRREGULAR 0.050 Unknown 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10128 A2 ZDD10027 0 0 1 IRREGULAR 0.050 Unknown 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10129 A2 ZDD10027 0 0 1 IRREGULAR 0.050 Unknown 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 29.0 None DTCH10130 A2 ZDD10027 0 0 1 IRREGULAR 0.050 Unknown 0.0 0.0 None 0 0.0 0.0 None 0.0 57.5 None 0.0 66.3 None DTCH10131 A2 ZDD10027 0 0 1 IRREGULAR 0.161 Unknown 0.0 0.0 None 0 0.0 35.9 Downstream 0.0 70.4 Downstream 0.0 82.7 Downstream CHAN10045 A2 ZCH10126 0 0 1 IRREGULAR 0.007 Concrete 113.2 106.9 None 0 176.8 162.9 None 264.6 197.1 None 291.1 207.1 None CHAN10047 A2 ZCH10126 0 0 1 IRREGULAR 0.007 Concrete 113.0 106.7 None 0 176.6 162.9 None 264.1 197.2 None 291.0 207.2 None CHAN10052 A2 ZCH10130 0 0 1 IRREGULAR 0.018 Concrete 55.1 59.8 None 0 141.1 100.5 None 157.8 217.9 None 166.2 218.5 Upstream CHAN10053 A2 ZCH10130 0 0 1 IRREGULAR 0.019 Concrete 55.0 59.8 None 0 155.9 100.4 None 159.7 205.9 Downstream 166.7 203.4 Downstream DTCH10132 A2 ZDD10001 0 0 1 IRREGULAR 0.305 Unknown 2.2 2.2 None 0 5.5 5.5 None 8.9 8.9 None 10.4 10.4 None DTCH10133 A2 ZDD10020 0 0 1 IRREGULAR 0.021 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10134 A2 ZDD10020 0 0 1 IRREGULAR 0.021 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10135 A2 ZDD10020 0 0 1 IRREGULAR 0.021 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10136 A2 ZDD10020 0 0 1 IRREGULAR 0.021 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10137 A2 ZDD10020 0 0 1 IRREGULAR 0.021 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10138 A2 ZDD10020 0 0 1 IRREGULAR 0.021 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10139 A2 ZDD10020 0 0 1 IRREGULAR 0.062 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10140 A2 ZDD10022 0 0 1 IRREGULAR 0.112 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10141 A2 ZDD10022 0 0 1 IRREGULAR 0.034 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10142 A2 ZDD10022 0 0 1 IRREGULAR 0.029 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10143 A2 ZDD10022 0 0 1 IRREGULAR 0.248 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10144 A2 ZDD10008 0 0 1 IRREGULAR 0.076 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10145 A2 ZDD10008 0 0 1 IRREGULAR 0.017 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10146 A2 ZDD10008 0 0 1 IRREGULAR 0.017 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10147 A2 ZDD10008 0 0 1 IRREGULAR 0.017 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10148 A2 ZDD10008 0 0 1 IRREGULAR 0.076 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None CHAN10054 A2 ZCH10133 0 0 1 IRREGULAR 0.461 EARTHEN 16.1 16.2 None 0 28.7 28.9 None 44.3 44.5 None 50.8 51.0 None CHAN10055 A2 ZCH10133 0 0 1 IRREGULAR 0.461 EARTHEN 16.0 16.2 None 0 28.7 28.9 None 44.6 44.5 None 50.7 50.9 None CHAN10056 A2 CH017B 0 0 1 IRREGULAR 0.121 Concrete 60.3 60.0 None 0 111.0 114.3 None 169.8 160.5 None 196.3 169.7 None CHAN10057 A2 CH017B 0 0 1 IRREGULAR 0.010 Concrete 56.5 56.3 None 0 106.5 104.3 None 158.2 151.4 None 186.1 170.3 None CHAN10058 A2 CH017B 0 0 1 IRREGULAR 0.010 Concrete 59.5 58.3 None 0 102.2 102.9 None 148.4 144.1 None 175.1 166.3 None CHAN10059 A2 CH017B 0 0 1 IRREGULAR 0.121 Concrete 58.1 57.2 None 0 102.2 100.0 None 148.1 145.2 None 175.8 166.6 None CHAN10060 A2 CH017C 0 0 1 IRREGULAR 0.060 Concrete 145.6 138.5 None 0 256.9 227.2 None 381.8 294.2 None 445.6 325.2 None CHAN10061 A2 CH017C 0 0 1 IRREGULAR 0.033 Concrete 145.6 138.5 None 0 256.2 226.9 None 381.6 291.3 None 444.7 324.2 None CHAN10064 A2 ZCH10056A 0 0 1 IRREGULAR 0.004 EARTHEN 10.3 10.3 None 0 16.0 16.1 None 24.3 24.5 None 28.1 28.4 None CHAN10065 A2 ZCH10056A 0 0 1 IRREGULAR 0.004 EARTHEN 8.0 7.5 None 0 13.7 15.4 None 20.6 21.0 None 24.3 14.0 None CHAN10066 A2 ZCH10056A 0 0 1 IRREGULAR 0.013 EARTHEN 7.8 7.3 None 0 13.3 10.0 None 20.0 10.3 None 23.5 10.3 None CHAN10067 A2 ZCH10056B 0 0 1 IRREGULAR 0.027 EARTHEN 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None CHAN10068 A2 ZCH10056B 0 0 1 IRREGULAR 0.190 EARTHEN 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 1.5 None CHAN10069 A2 ZCH10096A 0 0 1 IRREGULAR 0.009 EARTHEN 72.3 72.2 None 0 97.3 97.2 None 119.9 119.8 None 125.7 125.6 None CHAN10070 A2 ZCH10096A 0 0 1 IRREGULAR 0.005 EARTHEN 72.2 72.2 None 0 97.3 97.2 None 119.9 119.8 None 125.7 125.6 None CHAN10071 A2 ZCH10096B 0 0 1 IRREGULAR 0.069 EARTHEN 91.8 91.4 None 0 126.2 130.0 None 172.6 171.6 None 189.4 187.5 None CHAN10073 A2 ZCH10096B 0 0 1 IRREGULAR 0.009 EARTHEN 89.0 88.6 None 0 124.6 125.4 None 167.2 170.7 None 183.1 184.8 None CHAN10074 A2 ZCH10096B 0 0 1 IRREGULAR 0.009 EARTHEN 88.5 88.2 None 0 124.3 124.8 None 165.0 169.3 None 181.3 183.7 None CHAN10075 A2 ZCH10096B 0 0 1 IRREGULAR 0.009 EARTHEN 87.2 87.0 None 0 123.7 123.9 None 162.7 166.4 None 178.4 173.5 None CHAN10076 A2 ZCH10096B 0 0 1 IRREGULAR 0.009 EARTHEN 86.7 86.1 None 0 123.4 117.0 None 161.6 138.3 None 176.5 144.4 None DTCH10149 A2 BD005A 0 0 1 IRREGULAR 0.019 Unknown 10.2 10.3 None 0 18.2 18.3 None 27.7 27.9 None 31.8 31.6 None DTCH10150 A2 BD005A 0 0 1 IRREGULAR 0.009 Unknown 10.0 10.0 None 0 17.8 17.9 None 27.5 27.7 None 31.5 31.3 None DTCH10152 A2 BD005A 0 0 1 IRREGULAR 0.019 Unknown 8.9 8.9 None 0 25.9 17.1 None 25.9 26.3 None 29.7 30.2 None DTCH10153 A2 BD005B 0 0 1 IRREGULAR 0.465 Unknown 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10154 A2 BD005B 0 0 1 IRREGULAR 0.010 Unknown 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10155 A2 BD005B 0 0 1 IRREGULAR 0.011 Unknown 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10156 A2 BD005B 0 0 1 IRREGULAR 0.097 Unknown 0.0 0.0 None 0 0.0 0.0 None 0.7 0.6 None 0.7 0.8 None DTCH10157 A2 CH040B 0 0 1 IRREGULAR 0.005 Earthen 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10158 A2 CH040B 0 0 1 IRREGULAR 0.002 Earthen 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10159 A2 CH040B 0 0 1 IRREGULAR 0.002 Earthen 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10160 A2 CH040B 0 0 1 IRREGULAR 0.002 Earthen 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10161 A2 CH040B 0 0 1 IRREGULAR 0.002 Earthen 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10162 A2 CH040B 0 0 1 IRREGULAR 0.002 Earthen 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10163 A2 CH040B 0 0 1 IRREGULAR 0.002 Earthen 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 27 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
DTCH10164 A2 CH040B 0 0 1 IRREGULAR 0.002 Earthen 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10165 A2 CH040B 0 0 1 IRREGULAR 0.002 Earthen 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10166 A2 CH040B 0 0 1 IRREGULAR 0.005 Earthen 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None CHAN10082 A2 ZCH10209 0 0 1 IRREGULAR 0.011 Concrete 5.5 5.5 None 0 9.0 8.7 None 13.4 12.4 None 15.3 13.8 None CHAN10083 A2 ZCH10209 0 0 1 IRREGULAR 0.011 Concrete 5.1 4.6 None 0 8.9 6.9 None 13.0 9.2 None 14.6 10.3 None CHAN10084 A2 CH10212 0 0 1 IRREGULAR 0.221 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None CHAN10085 A2 CH10212 0 0 1 IRREGULAR 0.043 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None CHAN10086 A2 CH10212 0 0 1 IRREGULAR 0.043 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None CHAN10087 A2 CH10212 0 0 1 IRREGULAR 0.221 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 32.2 0.0 None CHAN10088 A2 0 0 1 IRREGULAR 0.003 Concrete 27.2 14.7 None 0 48.5 17.7 None 84.9 20.9 Upstream 96.6 21.9 Upstream CHAN10089 A2 0 0 1 IRREGULAR 0.003 Concrete 27.1 14.3 None 0 48.4 16.7 None 81.9 19.5 Downstream 94.1 20.5 Downstream CHAN10090 A2 0 0 1 IRREGULAR 0.003 Concrete 26.7 14.2 None 0 47.6 16.4 None 77.1 19.1 None 89.4 20.2 None CHAN10091 A2 0 0 1 IRREGULAR 0.003 Concrete 26.2 14.2 None 0 46.3 16.4 None 66.6 19.0 None 73.7 20.0 None CHAN10092 A2 0 0 1 IRREGULAR 0.052 Concrete 37.4 32.6 None 0 63.7 48.8 None 95.1 68.2 None 107.8 75.8 None CHAN10093 A2 0 0 1 IRREGULAR 0.034 Concrete 37.4 32.4 None 0 63.6 46.0 None 92.9 52.5 None 113.0 51.7 Downstream DTCH10169 A2 0 0 1 IRREGULAR 0.166 Concrete 62.4 58.7 None 0 102.7 86.7 None 155.3 134.7 None 176.9 131.4 None DTCH10170 A2 0 0 1 IRREGULAR 0.082 Concrete 58.7 51.6 None 0 98.0 73.6 None 150.4 101.0 None 170.3 112.1 None DTCH10171 A2 0 0 1 IRREGULAR 0.023 Concrete 57.1 51.5 None 0 96.5 73.5 None 148.6 100.8 None 168.8 111.9 None DTCH10172 A2 0 0 1 IRREGULAR 0.024 Concrete 56.9 51.8 None 0 95.9 73.7 None 147.5 101.0 None 168.6 112.0 None DTCH10173 A2 0 0 1 IRREGULAR 0.024 Concrete 55.9 51.4 None 0 94.6 73.4 None 145.4 100.5 None 166.4 111.5 None DTCH10174 A2 0 0 1 IRREGULAR 0.023 Concrete 58.0 52.6 None 0 97.7 74.6 None 143.0 100.3 None 163.4 110.9 None DTCH10175 A2 0 0 1 IRREGULAR 0.024 Concrete 56.5 52.0 None 0 93.0 73.8 None 143.8 99.0 None 162.9 111.1 None DTCH10176 A2 0 0 1 IRREGULAR 0.085 Concrete 56.2 51.9 None 0 92.6 73.7 None 142.9 98.9 None 162.4 110.8 None CHAN10094 A2 ZCH10210 0 0 1 IRREGULAR 0.153 Concrete 4.9 4.3 None 0 8.9 6.4 None 12.8 8.6 None 14.3 9.5 None CHAN10095 A2 ZCH10210 0 0 1 IRREGULAR 0.019 Concrete 4.5 4.1 None 0 7.4 6.2 None 12.0 8.4 None 13.5 9.3 None CHAN10096 A2 ZCH10210 0 0 1 IRREGULAR 0.019 Concrete 1.9 1.9 None 0 3.9 3.9 None 13.3 6.1 None 14.7 7.1 None CHAN10097 A2 ZCH10210 0 0 1 IRREGULAR 0.153 Concrete 1.9 1.9 None 0 3.9 3.9 None 66.5 6.1 None 62.5 7.1 None DTCH10181 A2 0 0 1 IRREGULAR 0.127 Concrete 3.1 3.1 None 0 4.9 4.9 None 7.2 7.2 None 8.2 8.2 None DTCH10182 A2 0 0 1 IRREGULAR 0.054 Concrete 2.9 2.9 None 0 4.7 4.7 None 7.0 7.0 None 7.9 7.9 None DTCH10183 A2 0 0 1 IRREGULAR 0.127 Concrete 2.9 2.9 None 0 4.7 4.7 None 6.9 6.9 None 7.9 7.9 None CHAN10098 A2 0 0 1 IRREGULAR 0.279 Concrete 96.4 96.9 None 0 201.2 201.8 None 320.8 321.0 None 377.7 378.6 None CHAN10100 A2 0 0 1 IRREGULAR 0.066 Concrete 96.4 96.9 None 0 201.1 201.8 None 320.8 321.0 None 377.7 378.6 None CHAN10101 A2 0 0 1 IRREGULAR 0.077 Concrete 96.4 96.9 None 0 201.0 201.6 None 320.8 320.9 None 377.7 378.6 None CHAN10102 A2 CH040A 0 0 1 IRREGULAR 0.014 Earthen 21.1 21.1 None 0 41.6 42.2 None 65.9 64.7 None 75.7 77.1 None CHAN10104 A2 CH040A 0 0 1 IRREGULAR 0.014 Earthen 20.1 20.1 None 0 40.0 40.4 None 59.0 60.3 None 67.1 70.1 None CHAN10105 A2 0 0 1 IRREGULAR 0.052 Concrete 100.0 100.5 None 0 208.6 209.2 None 333.3 333.5 None 392.2 393.1 None CHAN10107 A2 0 0 1 IRREGULAR 0.052 Concrete 100.0 100.5 None 0 208.5 209.2 None 333.2 333.4 None 392.1 393.0 None DTCH10184 A2 DD003 0 0 1 IRREGULAR 0.167 Unknown 25.2 25.3 None 0 42.9 42.6 None 64.8 61.7 None 74.2 68.3 None DTCH10186 A2 DD003 0 0 1 IRREGULAR 0.037 Unknown 24.4 24.4 None 0 41.8 41.1 None 63.6 61.6 None 72.5 68.1 None DTCH10187 A2 DD003 0 0 1 IRREGULAR 0.037 Unknown 23.8 23.8 None 0 40.9 40.2 None 62.5 61.2 None 71.2 67.6 None DTCH10188 A2 DD003 0 0 1 IRREGULAR 0.037 Unknown 23.3 23.2 None 0 40.5 39.8 None 62.1 61.0 None 71.0 67.5 None DTCH10189 A2 DD003 0 0 1 IRREGULAR 0.167 Unknown 23.3 23.2 None 0 40.5 39.8 None 62.1 61.0 None 70.9 67.5 None DTCH10197 A2 ZPIP12196 0 0 1 IRREGULAR 0.018 RCP 28.6 28.5 None 0 47.5 55.4 None 70.9 82.0 Downstream 81.6 90.6 Downstream DTCH10198 A2 ZDD10018 0 0 1 IRREGULAR 0.066 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10199 A2 ZDD10018 0 0 1 IRREGULAR 0.023 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10200 A2 ZDD10018 0 0 1 IRREGULAR 0.023 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10201 A2 ZDD10018 0 0 1 IRREGULAR 0.066 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10202 A2 ZDD10010 0 0 1 IRREGULAR 0.108 Unknown 0.5 0.5 None 0 1.0 1.0 None 1.6 1.6 None 1.9 1.9 None DTCH10203 A2 ZDD10010 0 0 1 IRREGULAR 0.019 Unknown 0.4 0.4 None 0 0.8 0.8 None 1.4 1.4 None 1.6 1.6 None DTCH10204 A2 ZDD10010 0 0 1 IRREGULAR 0.108 Unknown 0.4 0.4 None 0 0.8 0.8 None 1.4 1.4 None 1.6 1.6 None CHAN10115 A2 0 0 1 IRREGULAR 0.002 Earthen 21.0 21.0 None 0 43.4 43.5 None 70.4 70.0 None 85.0 85.3 None CHAN10116 A2 0 0 1 IRREGULAR 0.111 EARTHEN 3.3 3.3 None 0 6.3 6.3 None 10.1 10.1 None 11.6 11.6 None CHAN10117 A2 0 0 1 IRREGULAR 0.026 EARTHEN 2.2 2.2 None 0 4.5 4.5 None 7.5 7.5 None 8.9 8.9 None DTCH10207 A2 DD005 0 0 1 IRREGULAR 0.019 Concrete 23.2 23.3 None 0 40.8 40.8 None 62.9 58.3 None 72.7 66.9 None DTCH10208 A2 DD005 0 0 1 IRREGULAR 0.019 Concrete 23.0 23.1 None 0 40.3 40.6 None 62.3 57.7 None 71.6 64.5 None DTCH10209 A2 DD005 0 0 1 IRREGULAR 0.019 Concrete 23.1 23.3 None 0 40.4 40.1 None 61.5 37.6 None 70.1 34.9 None DTCH10210 A2 DD005 0 0 1 IRREGULAR 0.046 Concrete 22.9 23.0 None 0 40.1 28.6 Downstream 53.7 28.3 Downstream 53.6 30.7 Downstream DTCH10211 A2 0 0 1 IRREGULAR 0.020 EARTHEN 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10212 A2 0 0 1 IRREGULAR 0.006 EARTHEN 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10213 A2 0 0 1 IRREGULAR 0.006 EARTHEN 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10214 A2 0 0 1 IRREGULAR 0.006 EARTHEN 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.4 None DTCH10215 A2 0 0 1 IRREGULAR 0.006 EARTHEN 0.0 0.0 None 0 0.1 0.1 None 0.8 0.9 None 1.3 1.4 None DTCH10216 A2 0 0 1 IRREGULAR 0.020 EARTHEN 0.5 0.5 None 0 0.6 0.6 None 2.0 2.2 None 2.9 3.1 None DTCH10217 A2 0 0 1 IRREGULAR 0.030 EARTHEN 9.9 10.1 None 0 15.6 15.9 None 21.1 21.6 None 24.4 25.1 None DTCH10218 A2 0 0 1 IRREGULAR 0.009 EARTHEN 9.6 9.8 None 0 14.6 14.8 None 19.1 19.7 None 23.8 24.6 None DTCH10219 A2 0 0 1 IRREGULAR 0.009 EARTHEN 9.4 9.6 None 0 14.0 14.2 None 18.4 18.7 None 21.4 21.9 None DTCH10220 A2 0 0 1 IRREGULAR 0.009 EARTHEN 7.9 8.0 None 0 14.7 14.9 None 19.3 26.3 None 22.7 35.6 None DTCH10221 A2 0 0 1 IRREGULAR 0.009 EARTHEN 7.8 7.8 None 0 13.7 16.3 None 21.6 36.4 None 23.3 57.5 None DTCH10222 A2 0 0 1 IRREGULAR 0.030 EARTHEN 7.8 7.8 None 0 13.6 12.2 None 15.4 47.5 Downstream 19.3 72.6 Downstream DTCH10223 A2 0 0 1 IRREGULAR 0.035 EARTHEN 9.7 9.9 None 0 16.6 14.9 None 22.5 49.6 Upstream 28.3 74.0 Upstream DTCH10224 A2 0 0 1 IRREGULAR 0.006 EARTHEN 10.2 10.0 None 0 16.8 16.1 None 28.4 62.7 None 35.4 87.4 None DTCH10225 A2 0 0 1 IRREGULAR 0.035 EARTHEN 11.5 11.0 None 0 19.4 22.7 Downstream 35.0 75.6 Downstream 42.5 103.2 Downstream CHAN10126 A2 0 0 1 IRREGULAR 0.102 Concrete 30.4 30.8 None 0 53.8 54.0 None 75.4 77.4 None 83.2 86.6 None CHAN10127 A2 0 0 1 IRREGULAR 0.020 Concrete 29.4 29.9 None 0 52.9 53.1 None 74.7 76.7 None 82.5 86.0 None CHAN10128 A2 0 0 1 IRREGULAR 0.023 Concrete 26.3 26.7 None 0 53.8 53.5 None 74.8 76.5 None 82.3 85.5 None CHAN10131 A2 0 0 1 IRREGULAR 0.026 Concrete 17.6 17.7 None 0 35.5 35.7 None 56.3 56.0 None 65.8 66.0 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 28 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
CHAN10133 A2 0 0 1 IRREGULAR 0.034 Concrete 15.9 15.9 None 0 31.5 31.7 None 51.0 50.5 None 60.8 60.6 None CHAN10134 A2 0 0 1 IRREGULAR 0.019 Concrete 15.9 16.0 None 0 32.0 32.2 None 51.4 50.9 None 61.4 61.2 None CHAN10135 A2 0 0 1 IRREGULAR 0.020 Concrete 15.8 15.9 None 0 31.5 31.7 None 50.5 50.1 None 60.3 60.1 None CHAN10136 A2 0 0 1 IRREGULAR 0.056 Concrete 15.8 15.8 None 0 31.3 31.5 None 50.0 49.6 Downstream 59.8 59.5 Downstream CHAN10146 A2 ZCH10076 0 0 1 IRREGULAR 0.034 EARTHEN 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None CHAN10147 A2 ZCH10076 0 0 1 IRREGULAR 0.014 EARTHEN 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None CHAN10148 A2 ZCH10076 0 0 1 IRREGULAR 0.014 EARTHEN 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None CHAN10151 A2 ZCH10076 0 0 1 IRREGULAR 0.034 EARTHEN 71.5 71.5 None 0 96.6 97.0 Downstream 126.1 126.7 Downstream 135.5 136.3 Downstream CHAN10159 A2 0 0 1 IRREGULAR 0.127 EARTHEN 9.2 9.2 None 0 16.2 16.2 None 24.8 24.8 None 28.3 28.3 None CHAN10160 A2 0 0 1 IRREGULAR 0.127 EARTHEN 9.1 9.2 None 0 16.1 16.2 None 24.7 24.7 None 28.1 28.2 None CHAN10161 A2 CH017A 0 0 1 IRREGULAR 0.025 Concrete 90.8 83.5 None 0 163.1 127.5 None 244.5 169.3 None 280.6 176.7 None CHAN10162 A2 CH017A 0 0 1 IRREGULAR 0.021 Concrete 90.3 83.0 None 0 162.3 126.8 None 243.6 167.6 None 278.6 174.3 None DTCH10229 A2 ZDD10012 0 0 1 IRREGULAR 0.144 Unknown 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10230 A2 ZDD10012 0 0 1 IRREGULAR 1.839 Unknown 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None CHAN10163 A2 CH027D 0 0 1 IRREGULAR 0.184 Concrete 222.8 231.4 None 0 375.8 371.1 None 600.5 446.1 None 654.9 456.7 None CHAN10164 A2 CH027D 0 0 1 IRREGULAR 0.241 Concrete 222.4 231.2 None 0 375.2 370.9 Downstream 599.3 446.1 Downstream 654.4 456.7 Downstream DTCH10231 A2 DD10035 0 0 1 IRREGULAR 0.041 Concrete 10.4 10.5 None 0 18.5 18.7 None 28.4 28.6 None 32.5 32.1 None DTCH10232 A2 DD10035 0 0 1 IRREGULAR 0.041 Concrete 10.4 10.5 None 0 18.4 18.6 None 28.3 28.5 None 32.4 32.2 None CHAN10168 A2 0 0 1 IRREGULAR 0.032 Concrete 5.7 5.7 None 0 11.5 11.5 None 17.8 17.8 None 20.4 20.4 None CHAN10169 A2 0 0 1 IRREGULAR 0.026 Concrete 5.6 5.6 None 0 11.4 11.4 None 15.8 15.8 None 18.9 18.9 None CHAN10170 A2 0 0 1 IRREGULAR 0.016 Concrete 2.8 2.8 None 0 6.4 6.4 None 8.9 8.9 Downstream 12.1 12.1 Downstream CHAN10174 A2 0 0 1 IRREGULAR 0.030 Concrete 96.6 97.2 None 0 201.9 202.5 None 320.6 320.8 None 376.5 377.5 None CHAN10176 A2 0 0 1 IRREGULAR 0.038 Concrete 96.6 97.1 None 0 201.7 202.4 None 320.2 320.5 None 376.2 377.2 None CHAN10179 A2 0 0 1 IRREGULAR 0.033 Concrete 96.2 96.7 None 0 200.5 201.2 None 319.7 319.8 None 376.3 377.2 None CHAN10180 A2 0 0 1 IRREGULAR 0.013 Concrete 0.2 0.1 None 0 0.3 0.2 None 0.5 0.4 None 0.6 0.4 None CHAN10181 A2 0 0 1 IRREGULAR 0.009 Concrete 0.4 0.4 None 0 0.8 0.8 None 1.3 1.2 None 1.6 1.4 None CHAN10182 A2 0 0 1 IRREGULAR 0.030 Concrete 1.4 1.5 None 0 3.2 3.3 None 5.1 5.1 None 5.8 5.9 None CHAN10183 A2 0 0 1 IRREGULAR 0.028 Concrete 1.4 1.4 None 0 3.2 3.2 None 5.0 5.0 None 5.7 5.7 None CHAN10184 A2 0 0 1 IRREGULAR 0.156 Concrete 0.7 0.7 None 0 1.5 1.5 None 2.3 2.3 None 2.6 2.6 None CHAN10185 A2 0 0 1 IRREGULAR 0.123 Concrete 0.7 0.7 None 0 1.5 1.5 None 2.3 2.3 None 2.6 2.6 None CHAN10186 A2 0 0 1 IRREGULAR 0.182 Concrete 7.2 7.2 None 0 14.9 14.9 None 23.9 23.9 None 27.6 27.7 None CHAN10187 A2 0 0 1 IRREGULAR 0.182 Concrete 7.2 7.2 None 0 14.9 14.9 None 23.9 23.9 None 27.6 27.6 None DTCH10234 A2 ZDD10020 0 0 1 IRREGULAR 0.124 Concrete 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None FLOW10013 A2 0 0 1 DUMMY 0.007 RCP 10.7 10.7 None 0 19.0 19.0 None 29.8 29.8 None 34.0 34.0 None FLOW10015 A2 4 15 1 TRAPEZOIDAL 0.034 RCP 2.9 2.9 None 0 2.4 5.0 None 5.4 7.7 None 8.7 8.7 None DTCH10238 A2 0 0 1 IRREGULAR 0.057 EARTHEN 43.3 43.4 None 0 77.4 75.9 None 117.5 108.8 None 134.5 120.5 None DTCH10239 A2 0 0 1 IRREGULAR 0.018 EARTHEN 45.2 45.3 None 0 73.0 72.5 None 117.0 108.0 None 131.4 119.5 None DTCH10243 A2 0 0 1 IRREGULAR 0.057 EARTHEN 42.8 43.0 None 0 69.4 66.4 None 96.6 87.7 Downstream 106.6 92.9 Downstream CHAN10191 A2 ZPIP17822 0 0 1 IRREGULAR 0.015 RCP 59.6 54.5 None 0 215.5 224.6 None 189.7 217.6 None 185.1 191.6 None DTCH10487 A2 ZDD10014 0 0 1 IRREGULAR 0.335 Unknown 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10488 A2 ZDD10026 0 0 1 IRREGULAR 0.067 Unknown 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10489 A2 ZDD10002 0 0 1 IRREGULAR 0.008 Unknown 0.9 0.9 None 0 2.2 2.2 None 3.6 3.6 None 4.2 4.2 None DTCH10490 A2 ZDD10004 0 0 1 IRREGULAR 0.326 Unknown 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10491 A2 ZDD10024 0 0 1 IRREGULAR 0.060 Unknown 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10492 A2 ZDD10023 0 0 1 IRREGULAR 0.054 Unknown 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10493 A2 ZDD10001 0 0 1 IRREGULAR 0.113 Unknown 2.1 2.1 None 0 5.5 5.5 None 8.9 8.9 None 10.4 10.4 None DTCH10494 A2 ZDD10028 2 3 1 PARABOLIC 0.151 Unknown 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 Downstream 0.0 0.0 Downstream DTCH10496 A2 CH040C 0 0 1 IRREGULAR 0.394 Earthen 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10497 A2 ZDD10021 0 0 1 IRREGULAR 0.127 Concrete 0.4 0.4 None 0 0.6 0.7 None 0.9 0.9 None 1.0 1.0 None DTCH10498 A2 0 0 1 IRREGULAR 0.018 Concrete 3.5 3.5 None 0 5.7 5.6 None 8.6 7.4 None 9.8 7.4 None PIPE14818 A2 3 0 1 CIRCULAR 0.000 RCP 0.0 23.2 None 2.65 0.0 37.5 None 0.0 54.7 None 63.1 63.0 None PIPE14819 A2 3 0 1 CIRCULAR 0.003 RCP 0.0 23.1 None 0.63 0.0 37.3 None 0.0 54.8 None 63.0 63.0 None PIPE14814 A2 3 0 1 CIRCULAR 0.004 RCP 0.0 23.1 None 0.57 0.0 37.5 None 0.0 55.9 None 65.3 65.3 None PIPE14811 A2 3 0 1 CIRCULAR 0.004 RCP 0.0 23.2 None 0.55 0.0 37.7 None 0.0 55.3 None 63.1 63.1 None PIPE14803 A2 4.5 0 1 CIRCULAR 0.010 RCP 0.0 87.9 None 0.45 0.0 152.3 None 0.0 224.1 None 262.5 262.4 None CULV10258 A2 3.5 10 1 RECT_CLOSED 0.004 RCP 0.0 98.2 None 0.33 0.0 167.0 None 0.0 298.9 None 306.7 306.7 None PIPE14812 A2 3 0 1 CIRCULAR 0.009 RCP 0.0 23.2 None 0.37 0.0 37.7 None 0.0 55.3 None 63.4 63.4 None PIPE14807 A2 2.5 0 1 CIRCULAR 0.028 RCP 0.0 23.5 None 0.34 0.0 38.1 None 0.0 57.0 None 64.3 64.3 None PIPE14806 A2 3 0 1 CIRCULAR 0.012 RCP 0.0 23.1 None 0.32 0.0 37.3 None 0.0 55.0 None 63.3 63.3 None PIPE14808 A2 3 0 1 CIRCULAR 0.015 RCP 0.0 23.6 None 0.29 0.0 38.2 None 0.0 57.3 None 64.6 64.6 None CULV10259 A2 2.5 8 2 RECT_CLOSED 0.007 RCP 0.0 176.4 None 0.49 0.0 197.6 None 0.0 236.4 None 285.0 285.0 None PIPE14817 A2 6.5 0 1 CIRCULAR 0.006 RCP 0.0 98.7 None 0.25 0.0 167.8 None 0.0 244.5 None 286.0 286.0 None CULV10260 A2 2.5 8 2 RECT_CLOSED 0.008 RCP 0.0 170.3 Downstream 0.43 0.0 166.4 Downstream 0.0 234.1 Downstream 281.4 281.4 Downstream PIPE14805 A2 6.5 0 1 CIRCULAR 0.006 RCP 0.0 98.7 None 0.24 0.0 167.6 None 0.0 243.8 None 285.8 285.8 None PIPE14815 A2 3 0 1 CIRCULAR 0.035 RCP 0.0 23.6 None 0.19 0.0 38.3 None 0.0 57.2 None 67.1 67.1 None PIPE14816 A2 3 0 1 CIRCULAR 0.049 RCP 0.0 23.6 None 0.16 0.0 38.3 None 0.0 57.3 None 77.0 76.9 None PIPE14813 A2 3 0 1 CIRCULAR 0.036 RCP 0.0 23.2 None 0.18 0.0 37.7 None 0.0 55.2 None 63.0 63.0 None PIPE14820 A2 1 0 1 CIRCULAR 0.009 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.9 None 0.0 1.1 None PIPE14809 A2 4 0 1 CIRCULAR 0.008 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 12.1 None 17.6 17.6 None CHAN10794 A2 0.262 0 1 IRREGULAR 0.009 EARTHEN 0.0 158.2 Upstream 0.02 0.0 282.6 Upstream 0.0 509.5 Upstream 587.9 587.9 Upstream CHAN10791 A2 0 0 1 IRREGULAR 0.013 CONCRETE 0.0 155.4 None 0.01 0.0 281.6 None 0.0 507.6 None 588.9 588.7 None CHAN10792 A2 0 0 1 IRREGULAR 0.020 CONCRETE 0.0 156.3 None 0 0.0 284.6 None 0.0 507.0 None 588.1 588.0 None CHAN10790 A2 0 0 1 IRREGULAR 0.013 EARTHEN 0.0 156.4 None 0 0.0 281.3 None 0.0 507.2 None 587.1 587.1 None CHAN10793 A2 0 0 1 IRREGULAR 0.037 CONCRETE 0.0 155.8 None 0 0.0 277.9 None 0.0 492.2 None 568.0 568.1 None PIPE14804 A2 2 0 1 CIRCULAR 0.014 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE14810 A2 4 0 1 CIRCULAR 0.033 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 29 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
FLOW10091 A2 0 0 1 DUMMY 0.012 RCP 0.0 98.7 None 0 0.0 167.6 None 0.0 243.8 None 285.8 285.8 None FLOW10092 A2 0 0 1 DUMMY 0.006 RCP 0.0 98.2 None 0 0.0 167.0 None 0.0 300.2 None 308.0 308.0 None PIPE11928 A3 ZPIP11347 1.5 0 1 CIRCULAR 0.006 RCP 56.0 40.5 Both Upstream and Downstream 5.17 90.5 52.8 Both Upstream and Downstream 133.4 66.2 Both Upstream and Downstream 153.2 71.9 Both Upstream and Downstream PIPE11995 A3 ZPIP17423 1.5 0 1 CIRCULAR 0.001 PVC 10.8 9.2 Upstream 3.41 18.0 13.4 Upstream 27.1 18.1 Upstream 30.9 20.1 Upstream PIPE11871 A3 ZPIP11140 2 0 2 CIRCULAR 0.001 RCP 43.5 44.2 Both Upstream and Downstream 2.56 86.2 75.3 Both Upstream and Downstream 110.5 107.7 Both Upstream and Downstream 126.5 123.9 Both Upstream and Downstream PIPE11796 A3 ZPIP13803 1.5 0 1 CIRCULAR 0.004 RCP 15.1 14.5 Downstream 2.32 25.8 23.7 Both Upstream and Downstream 39.2 34.9 Both Upstream and Downstream 44.9 39.6 Both Upstream and Downstream PIPE11654 A3 ZPIP16773 1.083 0 1 CIRCULAR 0.005 CMP 7.2 4.9 Upstream 2.9 12.2 6.8 Upstream 18.3 8.8 Upstream 20.8 9.6 Upstream PIPE11655 A3 ZPIP16774 1.083 0 1 CIRCULAR 0.006 CMP 7.2 4.9 None 2.68 12.2 6.8 None 18.3 8.8 None 20.8 9.6 None PIPE12066 A3 ZPIP17503 1.5 0 1 CIRCULAR 0.001 RCP 8.7 9.0 None 2.46 15.3 15.3 None 26.0 17.5 Upstream 28.6 18.7 Upstream PIPE12202 A3 ZPIP15865 4 0 1 CIRCULAR 0.000 HDPE 30.5 24.7 None 1.84 90.4 52.7 Both Upstream and Downstream 78.8 70.0 Both Upstream and Downstream 85.5 65.0 Both Upstream and Downstream CULV10154 A3 CUL13262 3.583 2.25 1 ARCH 0.003 CMP 26.3 19.5 None 0.88 50.0 35.5 None 72.3 94.5 Upstream 83.4 106.1 Both Upstream and Downstream PIPE12290 A3 ZPIP11574 1.5 0 1 CIRCULAR 0.001 RCP 0.1 2.9 None 0.96 0.8 6.0 Both Upstream and Downstream 5.7 15.4 Both Upstream and Downstream 13.0 12.2 Both Upstream and Downstream PIPE12133 A3 ZPIP16083 1 0 1 CIRCULAR 0.042 CMP 9.0 7.2 Upstream 1.83 15.0 10.5 Upstream 41.0 14.1 Both Upstream and Downstream 43.8 15.9 Both Upstream and Downstream PIPE12210 A3 ZPIP14864 2 0 1 CIRCULAR 0.003 RCP 15.9 16.1 None 1.4 27.2 27.1 None 41.3 40.1 Upstream 47.3 45.7 Upstream PIPE12015 A3 ZPIP15401 2.5 0 1 CIRCULAR 0.002 RCP 28.4 34.2 None 2.06 39.2 58.2 None 42.2 64.2 None 45.0 65.2 None PIPE11801 A3 ZPIP17042 3.25 0 1 CIRCULAR 0.001 RCP 53.2 52.4 None 2.01 89.3 88.0 None 139.5 98.2 Upstream 158.9 100.7 Upstream PIPE11929 A3 ZPIP14874 2 0 1 CIRCULAR 0.007 RCP 57.8 40.9 Both Upstream and Downstream 2.17 93.9 53.1 Both Upstream and Downstream 138.2 66.6 Both Upstream and Downstream 158.7 72.4 Both Upstream and Downstream PIPE11898 A3 ZPIP11209 1.5 0 1 CIRCULAR 0.002 RCP 0.0 0.0 None 0 0.0 0.0 None 0.1 0.1 None 0.1 18.1 None PIPE11799 A3 ZPIP17040 3.5 0 1 CIRCULAR 0.001 RCP 60.6 60.6 None 1.95 100.9 97.3 None 163.9 108.9 None 183.1 112.2 None PIPE11925 A3 ZPIP14866 2.5 0 1 CIRCULAR 0.003 RCP 27.7 27.6 None 1.18 51.9 48.3 Both Upstream and Downstream 81.3 71.7 Both Upstream and Downstream 93.4 81.6 Both Upstream and Downstream PIPE11953 A3 ZPIP11498 2.5 0 1 CIRCULAR 0.005 CMP 29.4 27.6 None 1.71 47.5 38.0 Upstream 68.2 48.6 Upstream 77.7 53.3 Upstream PIPE12156 A3 ZPIP16535 1.5 0 1 CIRCULAR 0.002 RCP 4.9 5.0 None 1.18 8.3 9.0 None 12.5 13.4 None 14.2 13.8 None PIPE11927 A3 ZPIP11346 2 0 1 CIRCULAR 0.010 RCP 57.8 40.9 Both Upstream and Downstream 1.81 93.9 53.0 Both Upstream and Downstream 138.4 66.5 Both Upstream and Downstream 158.8 72.2 Both Upstream and Downstream PIPE11931 A3 ZPIP17269 2 0 1 CIRCULAR 0.011 RCP 62.1 42.5 Both Upstream and Downstream 1.8 101.3 55.0 Both Upstream and Downstream 149.3 68.9 Both Upstream and Downstream 171.4 74.8 Both Upstream and Downstream PIPE11800 A3 ZPIP17041 3 0 1 CIRCULAR 0.001 RCP 31.0 30.2 None 1.37 53.1 56.5 None 82.0 66.9 Both Upstream and Downstream 94.6 68.9 Both Upstream and Downstream PIPE12302 A3 ZPIP10920 2.5 0 1 CIRCULAR 0.004 RCP 73.4 50.7 None 2.06 110.5 60.3 Upstream 247.7 72.0 Upstream 239.3 77.0 Upstream PIPE11642 A3 ZPIP16768 3.5 0 1 CIRCULAR 0.005 CIPCP 362.4 182.5 Upstream 2.86 605.4 192.5 Upstream 894.2 196.6 Upstream 998.4 198.3 Upstream PIPE11782 A3 ZPIP10625 1.5 0 1 CIRCULAR 0.006 RCP 0.1 2.8 None 0.33 0.1 22.3 Both Upstream and Downstream 0.2 24.6 Both Upstream and Downstream 0.2 25.4 Both Upstream and Downstream PIPE12225 A3 2.5 0 1 CIRCULAR 0.002 RCP 26.4 23.9 None 1.29 48.6 38.0 None 74.9 51.4 None 82.9 54.1 Upstream PIPE12164 A3 PIP19069 4 0 2 CIRCULAR 0.005 CIPCP 524.9 138.0 None 0.8 903.3 253.2 None 1258.3 482.9 Upstream 1371.1 486.5 Upstream PIPE11906 A3 ZPIP14764 3 0 1 CIRCULAR 0.004 HDPE 64.5 64.5 None 1.52 102.0 99.8 None 149.7 113.5 None 169.3 116.0 None PIPE12163 A3 PIP19068 4 0 2 CIRCULAR 0.005 CIPCP 523.5 134.9 None 0.78 896.8 247.9 None 1245.9 471.7 Both Upstream and Downstream 1355.5 471.1 Both Upstream and Downstream PIPE12161 A3 ZPIP17908 1.5 0 1 CIRCULAR 0.006 RCP 7.7 7.7 None 0.92 12.8 12.8 None 19.5 19.5 None 22.5 22.4 None PIPE11855 A3 ZPIP14300 3 3 3 RECT_CLOSED 0.009 RCP 1.0 88.5 None 0.36 2.4 346.4 None 4.0 568.2 Upstream 4.6 632.2 Upstream PIPE12249 A3 ZPIP10627 3.5 0 1 CIRCULAR 0.004 RCP 64.8 79.6 None 1.32 104.1 113.6 Upstream 153.8 143.9 Upstream 172.9 154.5 Upstream PIPE11602 A3 ZPIP16641 2 0 1 CIRCULAR 0.009 RCP 11.8 11.8 None 0.54 24.0 24.0 None 37.8 37.7 None 44.4 55.5 None PIPE12176 A3 ZPIP20005 3 0 1 CIRCULAR 0.010 RCP 45.1 65.6 Both Upstream and Downstream 0.98 73.3 103.0 Both Upstream and Downstream 108.0 149.1 Both Upstream and Downstream 124.4 169.7 Both Upstream and Downstream PIPE11797 A3 ZPIP13804 2.5 0 1 CIRCULAR 0.006 RCP 69.6 45.0 Both Upstream and Downstream 1.42 114.2 58.3 Both Upstream and Downstream 168.1 72.9 Both Upstream and Downstream 192.1 79.3 Both Upstream and Downstream CULV10155 A3 CUL16010 3.583 2.25 1 ARCH 0.003 CMP 22.2 17.5 None 0.78 45.5 33.7 None 68.7 49.8 None 79.7 55.9 Upstream PIPE11798 A3 ZPIP17038 2.5 0 1 CIRCULAR 0.006 RCP 67.5 44.5 Both Upstream and Downstream 1.42 110.9 57.5 Both Upstream and Downstream 163.5 71.9 Both Upstream and Downstream 187.6 78.2 Both Upstream and Downstream PIPE11905 A3 ZPIP14763 3 0 1 CIRCULAR 0.005 HDPE 64.5 64.6 None 1.39 102.0 99.8 None 149.7 113.5 None 172.5 116.0 None PIPE11794 A3 ZPIP16667 2.5 0 1 CIRCULAR 0.007 RCP 83.0 49.9 None 1.41 136.3 63.7 Upstream 199.8 79.8 Upstream 228.8 86.8 Upstream PIPE11795 A3 ZPIP13802 2.5 0 1 CIRCULAR 0.007 RCP 83.0 50.4 Upstream 1.43 136.1 63.5 Both Upstream and Downstream 200.6 79.5 Both Upstream and Downstream 228.5 86.4 Both Upstream and Downstream PIPE11689 A3 ZPIP16844 2.25 0 1 CIRCULAR 0.006 RCP 14.1 26.7 None 1.13 30.4 35.9 None 51.9 62.6 None 59.7 56.8 Upstream PIPE12016 A3 ZPIP17456 2.5 0 1 CIRCULAR 0.004 RCP 28.0 33.3 None 1.29 38.2 57.2 None 40.3 61.6 Upstream 42.2 62.4 Upstream PIPE12123 A3 ZPIP15943 1.5 0 1 CIRCULAR 0.016 RCP 0.0 0.7 None 0.05 0.1 0.3 None 0.5 28.1 None 0.6 31.6 None CHAN10282 A3 0 0 1 IRREGULAR 0.009 Concrete 4.2 4.8 None 0.03 7.2 8.7 None 11.7 12.9 None 13.9 408.5 None PIPE11780 A3 ZPIP13222 1.5 0 1 CIRCULAR 0.051 RCP 31.7 31.2 None 1.32 50.8 44.6 Upstream 74.8 52.5 Upstream 84.7 56.1 Upstream PIPE12186 A3 PIP10617 3.5 0 1 CIRCULAR 0.002 RCP 47.7 40.9 None 0.83 111.4 82.0 None 158.6 110.1 None 172.8 117.0 None PIPE12162 A3 ZPIP17911 1.5 0 1 CIRCULAR 0.023 RCP 39.2 19.0 None 1.19 67.3 26.7 None 103.4 34.2 None 120.9 37.5 Upstream PIPE12195 A3 PIP10789 4 0 1 CIRCULAR 0.003 RCP 77.4 73.2 None 0.89 152.7 125.2 None 230.6 172.5 None 262.0 192.9 None PIPE12182 A3 ZPIP11353 4 0 1 CIRCULAR 0.003 RCP 77.4 73.2 None 0.89 152.8 125.2 None 230.7 172.5 None 262.3 192.9 None PIPE11653 A3 ZPIP16772 1.083 0 1 CIRCULAR 0.004 CMP 2.6 1.9 Both Upstream and Downstream 1.18 4.4 2.6 Both Upstream and Downstream 6.5 3.3 Both Upstream and Downstream 7.4 3.6 Both Upstream and Downstream PIPE12287 A3 ZPIP15295 1.5 0 1 CIRCULAR 0.002 RCP 0.0 0.1 None 0.02 0.3 2.9 Both Upstream and Downstream 8.1 10.6 Both Upstream and Downstream 7.5 11.1 Both Upstream and Downstream PIPE11700 A3 ZPIP13073 1.5 0 1 CIRCULAR 0.010 RCP 7.8 7.8 None 0.74 12.8 13.2 None 19.1 20.7 None 21.7 22.8 None PIPE12264 A3 ZPIP10918 2.5 0 1 CIRCULAR 0.005 RCP 65.1 43.4 None 1.49 99.3 50.3 Both Upstream and Downstream 218.7 59.0 Both Upstream and Downstream 207.3 63.0 Both Upstream and Downstream PIPE12267 A3 ZPIP17099 2.5 0 1 CIRCULAR 0.004 RCP 56.9 37.7 Both Upstream and Downstream 1.46 95.1 44.6 Both Upstream and Downstream 197.1 52.3 Both Upstream and Downstream 180.8 55.9 Both Upstream and Downstream PIPE11688 A3 ZPIP16843 6.5 0 1 CIRCULAR 0.006 CIPCP 514.3 484.3 None 1.43 854.7 500.1 None 1228.9 671.7 None 1388.7 715.9 None PIPE11926 A3 ZPIP11343 2.5 0 1 CIRCULAR 0.013 RCP 38.7 38.6 None 0.84 70.5 61.8 Both Upstream and Downstream 109.0 86.0 Both Upstream and Downstream 124.9 96.7 Both Upstream and Downstream PIPE12316 A3 ZPIP11344 2.5 0 1 CIRCULAR 0.013 RCP 40.4 40.5 None 0.87 67.9 63.3 Upstream 115.5 86.3 Both Upstream and Downstream 136.0 96.8 Both Upstream and Downstream PIPE12059 A3 ZPIP17500 3.5 0 1 CIRCULAR 0.006 RCP 77.8 81.3 None 1.06 128.0 117.9 Both Upstream and Downstream 189.7 146.9 Both Upstream and Downstream 213.2 158.1 Both Upstream and Downstream PIPE11783 A3 ZPIP10626 3.5 0 1 CIRCULAR 0.006 RCP 77.4 79.7 None 1.04 126.4 115.1 Both Upstream and Downstream 185.2 145.0 Both Upstream and Downstream 207.0 155.7 Both Upstream and Downstream PIPE11806 A3 ZPIP10821 2.5 0 1 CIRCULAR 0.038 CMP 27.5 27.4 None 0.63 48.5 49.9 None 77.3 76.3 None 89.3 87.6 None PIPE11917 A3 ZPIP11338 1.5 0 1 CIRCULAR 0.008 PVC 5.4 5.4 None 0.59 9.8 9.8 None 15.0 16.2 None 17.2 18.4 None PIPE12215 A3 ZPIP11046 1.5 0 1 CIRCULAR 0.027 RCP 10.3 10.7 None 0.62 19.8 20.6 None 32.5 31.2 Both Upstream and Downstream 36.9 34.6 Both Upstream and Downstream PIPE12269 A3 ZPIP17101 2.5 0 1 CIRCULAR 0.006 RCP 63.5 42.2 Upstream 1.37 99.7 49.2 Both Upstream and Downstream 212.9 57.6 Both Upstream and Downstream 201.6 61.6 Both Upstream and Downstream PIPE12148 A3 ZPIP17847 4 0 1 CIRCULAR 0.000 HDPE 12.1 20.8 None 0.76 17.5 33.3 None 35.9 47.8 None 46.2 53.9 None PIPE11687 A3 ZPIP13032 6.5 0 1 CIRCULAR 0.005 CIPCP 504.5 354.9 None 1.06 835.8 466.5 None 1202.7 585.1 None 1353.8 645.4 None PIPE12222 A3 ZPIP11342 2.25 0 1 CIRCULAR 0.004 RCP 10.3 10.3 None 0.51 22.6 22.4 None 36.7 36.3 None 42.7 38.8 None PIPE12288 A3 ZPIP11572 2 3.167 1 HORIZ_ELLIPSE 0.004 RCP 22.6 22.7 None 0.86 40.3 33.9 Both Upstream and Downstream 86.9 44.4 Both Upstream and Downstream 72.7 50.6 Both Upstream and Downstream PIPE12301 A3 ZPIP10919 2.5 0 1 CIRCULAR 0.007 RCP 66.1 44.5 None 1.34 98.9 51.3 Both Upstream and Downstream 222.9 60.1 Both Upstream and Downstream 211.7 64.2 Both Upstream and Downstream PIPE12268 A3 ZPIP17100 2.5 0 1 CIRCULAR 0.005 RCP 59.5 40.1 Both Upstream and Downstream 1.33 96.0 46.0 Both Upstream and Downstream 201.5 54.1 Both Upstream and Downstream 188.9 57.8 Both Upstream and Downstream CULV10176 A3 CUL063 3 0 2 CIRCULAR 0.038 RCP 528.4 194.0 None 0.74 881.2 262.5 None 1174.1 485.5 Both Upstream and Downstream 1357.4 500.1 Both Upstream and Downstream PIPE11753 A3 ZPIP13188 1.5 0 1 CIRCULAR 0.026 RCP 12.8 12.9 None 0.76 20.6 20.6 None 30.3 29.2 None 34.2 31.7 None PIPE12198 A3 6.5 0 1 CIRCULAR 0.005 CIPCP 506.5 351.4 None 1.05 836.5 466.3 None 1204.4 594.6 None 1357.1 623.1 None PIPE11712 A3 ZPIP13091 6 0 1 CIRCULAR 0.006 CIPCP 492.7 318.8 None 1.12 809.0 435.4 None 1186.6 529.7 None 1342.9 526.7 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 30 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
CULV10173 A3 ZCUL16585 3 8 3 RECT_CLOSED 0.001 RCP 509.6 178.6 None 0.65 803.8 262.5 None 1174.7 485.5 Both Upstream and Downstream 1358.6 500.1 Both Upstream and Downstream PIPE12200 A3 6.5 0 1 CIRCULAR 0.005 CIPCP 504.5 338.3 None 1.01 830.7 475.6 None 1206.9 565.0 None 1362.0 605.6 None PIPE11633 A3 ZPIP16762 1.5 0 1 CIRCULAR 0.020 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 29.9 None 0.2 26.4 Both Upstream and Downstream PIPE12228 A3 ZPIP12825 1.5 0 1 CIRCULAR 0.004 RCP 0.0 0.0 None 0 0.0 10.9 None 0.9 17.5 None 1.3 11.5 Downstream PIPE12073 A3 ZPIP11856 4 0 1 CIRCULAR 0.000 HDPE 12.2 15.2 None 0.64 16.2 25.5 None 29.6 35.9 None 46.3 42.0 None PIPE12129 A3 ZPIP11958 1.5 0 1 CIRCULAR 0.016 ACP 9.9 9.9 None 0.75 17.0 16.4 None 25.5 23.0 None 29.0 23.4 None PIPE11973 A3 ZPIP11546 1.5 0 1 CIRCULAR 0.017 RCP 7.2 7.2 None 0.53 13.1 13.1 None 19.9 19.9 None 22.8 23.9 None CULV10139 A3 ZCUL072A 2 0 3 CIRCULAR 0.029 RCP 45.1 75.2 Both Upstream and Downstream 0.65 73.4 120.1 Both Upstream and Downstream 108.2 176.3 Both Upstream and Downstream 124.6 201.7 Both Upstream and Downstream PIPE11784 A3 ZPIP16969 2 0 1 CIRCULAR 0.004 RCP 8.2 8.2 None 0.59 13.2 13.2 None 19.5 20.6 None 22.0 23.6 None PIPE12040 A3 ZPIP11653 1.5 0 1 CIRCULAR 0.014 RCP 7.6 7.6 None 0.61 12.9 12.8 None 19.2 20.2 None 21.8 21.5 None PIPE11748 A3 ZPIP13183 2.5 0 1 CIRCULAR 0.006 RCP 20.9 20.9 None 0.66 34.1 34.4 None 50.6 49.6 None 57.4 54.3 None CULV10147 A3 ZCUL065A 3 6 3 RECT_CLOSED 0.002 RCP 192.5 223.3 None 0.74 323.2 354.9 None 484.1 476.8 Upstream 551.9 513.3 Upstream PIPE11542 A3 ZPIP10219 2 0 1 CIRCULAR 0.003 RCP 8.3 8.6 None 0.65 14.2 13.6 None 21.3 19.8 None 26.0 22.3 None PIPE12120 A3 ZPIP11884 2.25 0 1 CIRCULAR 0.005 RCP 8.8 8.8 None 0.4 20.0 20.5 None 32.9 33.1 None 38.9 36.8 Both Upstream and Downstream PIPE12246 A3 3 0 1 CIRCULAR 0.011 RCP 46.3 50.4 Both Upstream and Downstream 0.72 74.6 74.5 Both Upstream and Downstream 110.0 104.4 Both Upstream and Downstream 126.8 117.6 Both Upstream and Downstream PIPE12147 A3 ZPIP17846 2.5 0 1 CIRCULAR 0.002 HDPE 8.0 10.1 None 0.58 14.0 16.0 None 26.6 24.6 None 48.8 28.2 None CULV10140 A3 CUL080A 2.5 3 1 RECT_CLOSED 0.006 RCP 30.6 29.4 None 0.57 53.0 49.1 None 73.7 75.5 None 84.8 82.7 None PIPE11718 A3 ZPIP10444 1.5 0 1 CIRCULAR 0.025 RCP 10.4 10.4 None 0.63 17.0 17.4 None 25.4 25.8 None 28.8 26.1 Upstream PIPE12179 A3 ZPIP20009 1.5 0 1 CIRCULAR 0.002 RCP 2.7 2.7 None 0.61 4.3 4.3 None 6.3 6.3 None 7.1 7.1 None PIPE11725 A3 ZPIP13165 1.5 0 1 CIRCULAR 0.010 RCP 3.8 3.8 None 0.36 6.1 7.8 None 9.2 14.4 Upstream 10.4 16.2 Both Upstream and Downstream PIPE11827 A3 ZPIP10854 2.5 0 1 CIRCULAR 0.020 RCP 23.0 23.0 None 0.4 48.3 48.2 None 76.0 86.1 Upstream 88.4 89.8 Both Upstream and Downstream PIPE12031 A3 ZPIP15431 2.5 0 1 CIRCULAR 0.017 RCP 31.7 31.9 None 0.59 52.4 52.3 None 78.6 77.1 None 89.4 83.2 None PIPE11587 A3 ZPIP12750 1.5 0 1 CIRCULAR 0.008 RCP 1.2 1.2 None 0.13 1.9 12.5 None 2.8 13.7 Both Upstream and Downstream 3.2 14.5 Both Upstream and Downstream PIPE11937 A3 ZPIP14880 2.5 0 1 CIRCULAR 0.014 RCP 35.9 34.1 None 0.7 61.3 53.0 None 96.7 71.0 None 113.1 74.2 Upstream PIPE12024 A3 ZPIP15425 3 0 1 CIRCULAR 0.005 RCP 20.4 20.5 None 0.43 35.2 35.4 None 53.2 59.4 None 60.9 71.8 None PIPE12244 A3 ZPIP17457 3.5 0 1 CIRCULAR 0.007 RCP 74.6 69.4 None 0.82 123.1 104.0 Both Upstream and Downstream 183.6 122.1 Both Upstream and Downstream 207.0 128.0 Both Upstream and Downstream PIPE11637 A3 ZPIP10270 2 0 1 CIRCULAR 0.026 RCP 24.3 24.2 None 0.66 39.8 38.9 None 59.6 53.2 Both Upstream and Downstream 67.9 55.7 Both Upstream and Downstream PIPE11645 A3 ZPIP10276 2.75 0 1 CIRCULAR 0.008 RCP 20.4 22.6 None 0.48 32.9 37.7 None 50.6 67.9 None 55.7 70.8 None PIPE12220 A3 PIP10785 4.5 0 1 CIRCULAR 0.004 RCP 70.6 66.7 None 0.57 141.1 113.5 None 213.7 158.6 None 242.8 176.3 None PIPE11850 A3 ZPIP14279 2 0 1 CIRCULAR 0.013 RCP 12.7 13.8 None 0.54 18.1 23.2 None 35.8 34.1 None 40.3 38.6 None PIPE12165 A3 PIP19070 4 0 2 CIRCULAR 0.007 HDPE 111.9 146.5 None 0.59 189.7 227.8 None 273.1 280.6 None 310.2 369.8 None PIPE12166 A3 PIP19071 4 0 2 CIRCULAR 0.007 HDPE 112.7 147.7 None 0.6 191.5 229.9 None 275.8 283.8 None 313.4 366.2 None PIPE12241 A3 ZPIP10413 4 0 1 CIRCULAR 0.010 CIPCP 69.5 70.5 None 0.57 114.6 116.9 None 174.4 171.6 None 197.2 181.8 None PIPE11692 A3 ZPIP10384 2 0 1 CIRCULAR 0.009 RCP 8.7 19.7 None 0.9 16.5 20.7 None 28.1 36.4 None 31.5 32.3 Downstream PIPE11830 A3 ZPIP13928 1.5 0 1 CIRCULAR 0.040 RCP 11.9 11.9 None 0.57 25.9 25.8 None 41.2 29.5 Both Upstream and Downstream 47.7 30.8 Both Upstream and Downstream CULV10175 A3 CUL16857 6 8 1 RECT_CLOSED 0.003 RCP 437.7 172.9 None 0.43 741.2 294.7 None 1637.7 572.8 None 1670.0 590.2 None PIPE11656 A3 ZPIP16775 1.5 0 1 CIRCULAR 0.014 ACP 7.3 7.3 None 0.58 12.2 12.1 None 18.2 18.5 Upstream 20.6 18.2 Upstream PIPE11730 A3 ZPIP10458 2 0 1 CIRCULAR 0.017 RCP 18.8 18.8 None 0.63 30.9 30.6 None 46.6 42.8 Both Upstream and Downstream 53.1 43.0 Both Upstream and Downstream PIPE11897 A3 ZPIP11208 1.5 0 1 CIRCULAR 0.005 RCP 0.0 0.0 None 0 0.0 0.0 None 1.1 3.7 None 1.4 11.0 None PIPE11620 A3 ZPIP10262 4.5 0 1 CIRCULAR 0.007 CIPCP 362.8 182.5 None 1.3 606.5 192.5 None 897.8 199.1 None 998.1 200.5 None PIPE11708 A3 ZPIP10412 1.5 0 1 CIRCULAR 0.009 RCP 3.3 4.2 None 0.42 5.1 5.2 None 6.8 14.9 None 7.3 14.4 None PIPE11814 A3 ZPIP13904 2 0 1 CIRCULAR 0.014 RCP 11.0 11.0 None 0.41 21.5 21.5 None 33.4 33.4 None 38.5 38.5 None PIPE12127 A3 ZPIP11956 1.5 0 1 CIRCULAR 0.016 ACP 7.2 7.2 None 0.55 12.1 11.7 None 18.1 17.3 None 20.6 18.6 None PIPE11635 A3 ZPIP10268 2 0 1 CIRCULAR 0.038 RCP 24.4 24.3 None 0.55 39.9 39.0 None 59.8 55.2 Both Upstream and Downstream 68.1 62.0 Both Upstream and Downstream CHAN10284 A3 CH050A 0 0 1 IRREGULAR 0.002 Concrete 96.6 114.5 None 0.73 153.0 175.0 None 213.5 208.4 None 237.3 221.9 None PIPE11910 A3 ZPIP14788 4 0 2 CIRCULAR 0.008 HDPE 106.3 139.2 None 0.55 178.9 215.1 None 256.6 262.9 None 291.0 354.4 None CULV10151 A3 CUL080B 2.5 3 1 RECT_CLOSED 0.006 RCP 0.9 24.9 None 0.48 1.5 41.7 None 0.3 62.9 None 0.3 72.0 None PIPE12009 A3 ZPIP17447 1.5 0 1 CIRCULAR 0.011 RCP 7.4 8.1 None 0.75 12.0 10.6 Both Upstream and Downstream 18.0 13.6 Both Upstream and Downstream 20.4 15.0 Both Upstream and Downstream CULV10141 A3 ZCUL15170 3 7 1 RECT_CLOSED 0.004 RCP 84.5 114.5 None 0.74 129.1 171.1 None 177.6 204.7 None 197.9 216.1 None PIPE12284 A3 ZPIP15292 1.5 0 1 CIRCULAR 0.005 RCP 2.0 6.1 None 0.82 3.4 4.5 Both Upstream and Downstream 8.7 7.4 Both Upstream and Downstream 5.7 10.3 Both Upstream and Downstream PIPE11646 A3 ZPIP10277 2.75 0 1 CIRCULAR 0.010 RCP 21.4 22.6 None 0.44 34.4 37.7 None 52.1 68.0 None 58.0 71.7 None PIPE12012 A3 ZPIP11633 2 0 1 CIRCULAR 0.041 RCP 28.1 32.5 None 0.71 36.6 56.3 Upstream 36.6 62.8 Upstream 36.6 63.7 Upstream PIPE11647 A3 ZPIP12829 2.75 0 1 CIRCULAR 0.010 RCP 22.1 22.7 None 0.43 35.7 37.7 None 53.5 68.1 None 59.9 71.8 None PIPE11734 A3 ZPIP13171 1.5 0 1 CIRCULAR 0.015 RCP 6.2 6.3 None 0.5 10.0 10.1 None 14.9 14.2 None 16.8 17.3 None PIPE11974 A3 ZPIP11547 1.5 0 1 CIRCULAR 0.028 RCP 7.0 7.0 None 0.4 12.9 12.8 None 19.7 18.8 None 22.5 23.9 None PIPE12039 A3 ZPIP11652 2.5 0 1 CIRCULAR 0.020 RCP 29.9 30.1 None 0.52 49.6 49.5 None 74.3 75.4 None 84.4 78.9 Upstream CHAN10300 A3 CH060A 0 0 1 IRREGULAR 0.006 Earthen 178.6 176.0 Upstream 0.35 619.4 600.2 Upstream 736.9 659.4 Upstream 780.5 696.1 Upstream PIPE11826 A3 ZPIP10853 3 0 1 CIRCULAR 0.016 RCP 34.2 34.2 None 0.4 70.4 71.4 None 108.7 108.5 None 126.6 115.6 None PIPE11829 A3 ZPIP13927 1.5 0 1 CIRCULAR 0.050 RCP 11.7 11.7 None 0.5 25.6 25.0 None 40.8 29.2 Upstream 47.3 31.9 Both Upstream and Downstream PIPE11582 A3 ZPIP12746 1.5 0 1 CIRCULAR 0.027 RCP 9.7 9.7 None 0.56 15.7 15.6 None 23.2 23.4 None 26.3 23.5 None PIPE11805 A3 ZPIP13866 3 0 1 CIRCULAR 0.031 CMP 26.2 26.2 None 0.41 46.6 46.7 None 74.9 73.9 None 86.5 85.2 Upstream PIPE11907 A3 ZPIP14765 3 0 1 CIRCULAR 0.017 HDPE 63.4 63.6 None 0.74 100.5 98.4 None 147.4 112.0 Upstream 166.8 114.4 Upstream CHAN10281 A3 0 0 1 IRREGULAR 0.009 Concrete 3.7 4.3 None 0.12 4.7 7.1 None 6.9 10.4 None 7.8 49.3 None CULV10152 A3 CUL055A 3.583 2.25 1 ARCH 0.025 CMP 31.9 24.9 None 0.38 54.1 41.2 None 76.3 76.4 None 88.0 86.3 Downstream PIPE12126 A3 ZPIP11955 1.5 0 1 CIRCULAR 0.015 ACP 7.1 7.2 None 0.55 12.1 12.2 None 18.0 16.8 None 20.5 17.2 None PIPE12128 A3 ZPIP11957 1.5 0 1 CIRCULAR 0.017 ACP 7.2 7.2 None 0.53 12.1 11.7 None 18.1 19.3 None 20.6 18.1 None PIPE12151 A3 ZPIP16524 3.75 2.417 1 VERT_ELLIPSE 0.005 RCP 28.0 22.8 None 0.47 41.0 38.4 None 62.7 59.3 None 67.0 64.2 None PIPE12026 A3 ZPIP15428 3 0 1 CIRCULAR 0.005 RCP 20.5 20.6 None 0.44 35.4 35.5 None 53.5 53.8 None 61.2 61.8 None PIPE11543 A3 ZPIP12715 1.5 0 1 CIRCULAR 0.031 RCP 9.8 9.8 None 0.53 15.8 15.7 None 23.3 23.5 None 26.4 24.0 Upstream PIPE12011 A3 ZPIP11632 2 0 1 CIRCULAR 0.045 RCP 28.1 32.5 None 0.67 36.7 56.2 None 36.7 61.6 None 36.6 62.8 None PIPE11601 A3 ZPIP16640 2 0 1 CIRCULAR 0.026 RCP 11.8 11.8 None 0.32 24.0 24.1 None 37.5 37.7 None 44.6 47.2 None PIPE11621 A3 ZPIP10263 5 0 1 CIRCULAR 0.010 CIPCP 399.5 215.2 None 0.97 666.5 255.3 None 982.1 288.8 None 1078.3 286.8 None PIPE11746 A3 ZPIP13181 1.5 0 1 CIRCULAR 0.018 RCP 7.0 7.0 None 0.49 11.0 11.0 None 16.0 15.7 None 18.0 18.2 None PIPE12184 A3 ZPIP15154 3.5 0 1 CIRCULAR 0.013 CMP 38.7 33.2 None 0.54 81.6 60.5 None 118.4 76.7 None 135.3 80.0 None PIPE11584 A3 ZPIP10233 5.5 0 1 CIRCULAR 0.021 RCP 196.7 197.6 None 0.41 335.7 337.4 None 497.0 574.3 Both Upstream and Downstream 549.4 610.1 Both Upstream and Downstream PIPE11938 A3 ZPIP14881 2.5 0 1 CIRCULAR 0.021 RCP 34.1 32.3 None 0.55 58.3 50.7 None 92.0 74.4 Upstream 102.2 74.6 Both Upstream and Downstream

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 31 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE11667 A3 ZPIP10366 1.5 0 1 CIRCULAR 0.027 RCP 6.0 6.0 None 0.35 9.5 9.5 None 13.9 16.1 None 15.6 21.5 None PIPE11717 A3 ZPIP10443 2.25 0 1 CIRCULAR 0.011 RCP 16.5 16.5 None 0.52 27.4 26.1 None 41.1 40.0 None 46.9 40.2 None CULV10137 A3 ZCUL12204 4 8 1 RECT_CLOSED 0.002 RCP 110.6 120.6 None 0.57 168.8 191.2 None 241.4 248.0 None 253.0 267.7 None PIPE12018 A3 ZPIP11635 3.5 0 1 CIRCULAR 0.004 RCP 44.5 44.4 None 0.66 73.2 91.9 None 111.3 82.4 Both Upstream and Downstream 126.7 84.1 Both Upstream and Downstream PIPE11840 A3 ZPIP17070 1.5 0 1 CIRCULAR 0.010 RCP 4.5 4.6 None 0.45 7.3 7.5 None 11.2 11.2 None 12.8 12.8 None PIPE12022 A3 ZPIP15406 3 0 1 CIRCULAR 0.012 RCP 38.5 38.6 None 0.53 63.7 77.0 None 97.3 91.0 Both Upstream and Downstream 110.9 91.2 Both Upstream and Downstream PIPE12251 A3 ZPIP15290 1.5 0 1 CIRCULAR 0.005 RCP 2.1 6.5 None 0.87 3.4 3.4 Both Upstream and Downstream 6.6 4.7 Both Upstream and Downstream 5.5 9.2 Both Upstream and Downstream CHAN10221 A3 CH10142C 0 0 1 IRREGULAR 0.005 Earthen 199.0 225.6 None 0.72 314.6 362.0 Upstream 326.2 417.8 Upstream 268.2 388.0 Upstream DTCH10276 A3 DD055A 0 0 1 IRREGULAR 0.001 CONCRETE 522.0 178.6 None 0.45 921.3 262.3 None 1171.5 485.5 Both Upstream and Downstream 1353.8 500.1 Both Upstream and Downstream PIPE12017 A3 ZPIP11634 3.5 0 1 CIRCULAR 0.004 RCP 48.0 47.4 None 0.74 79.4 80.9 Downstream 120.4 82.0 Both Upstream and Downstream 136.8 78.8 Both Upstream and Downstream PIPE12064 A3 ZPIP15559 1.5 0 1 CIRCULAR 0.002 RCP 0.7 3.6 None 0.7 1.1 5.8 None 1.7 5.7 None 1.6 6.3 Downstream PIPE12124 A3 ZPIP11929 3.5 0 3 CIRCULAR 0.003 RCP 81.4 91.2 None 0.56 127.3 141.7 None 169.9 176.2 None 187.8 200.3 None PIPE11682 A3 ZPIP10379 6 0 1 CIRCULAR 0.015 CIPCP 499.0 325.6 None 0.72 820.0 444.9 None 1199.0 543.5 None 1362.6 549.8 None PIPE11804 A3 ZPIP10820 2.5 0 1 CIRCULAR 0.058 CMP 26.5 26.7 None 0.5 41.7 42.1 None 63.3 58.8 None 75.2 65.0 None PIPE11836 A3 ZPIP13972 2 0 1 CIRCULAR 0.005 RCP 7.2 7.2 None 0.44 11.3 11.4 None 16.5 17.3 None 18.6 19.9 None CHAN10285 A3 CH050A 0 0 1 IRREGULAR 0.002 Concrete 93.7 112.5 None 0.62 146.9 172.3 None 204.8 206.4 None 228.7 221.7 None PIPE11588 A3 ZPIP12751 1.5 0 1 CIRCULAR 0.033 RCP 8.6 8.6 None 0.45 13.7 13.7 None 20.2 20.1 None 22.8 23.1 None PIPE11661 A3 ZPIP12992 1.75 0 1 CIRCULAR 0.096 RCP 27.2 27.3 None 0.56 47.7 47.7 None 72.1 58.0 Upstream 82.3 59.7 Upstream PIPE12285 A3 ZPIP15293 1.5 0 1 CIRCULAR 0.004 RCP 0.0 0.0 None 0 0.7 2.9 Both Upstream and Downstream 25.6 4.0 Both Upstream and Downstream 7.5 8.4 Both Upstream and Downstream PIPE11534 A3 ZPIP12709 4.5 0 1 CIRCULAR 0.015 RCP 99.7 100.1 None 0.42 172.8 173.1 None 254.5 255.5 None 281.5 290.4 None PIPE11681 A3 ZPIP10378 6 0 1 CIRCULAR 0.015 CIPCP 496.1 322.7 None 0.72 814.9 440.6 None 1193.3 526.5 None 1354.6 537.9 None PIPE11720 A3 ZPIP10446 1.5 0 1 CIRCULAR 0.019 RCP 6.8 6.8 None 0.47 11.1 12.0 None 16.6 18.4 None 18.8 17.4 None CULV10146 A3 CUL051A 4 0 1 CIRCULAR 0.010 RCP 99.9 89.7 None 0.63 166.3 131.4 Upstream 214.6 160.8 Upstream 232.2 172.0 Upstream PIPE12197 A3 PIP10825 2 0 1 CIRCULAR 0.025 PVC 32.4 30.5 None 0.85 60.0 39.4 None 91.5 42.5 None 103.3 43.1 None PIPE11828 A3 ZPIP10855 2.5 0 1 CIRCULAR 0.056 RCP 34.4 34.4 None 0.35 70.7 71.6 None 109.1 107.5 None 127.0 114.5 Upstream PIPE12051 A3 ZPIP17471 2 0 1 CIRCULAR 0.011 RCP 9.9 9.9 None 0.43 17.0 16.2 None 25.5 23.1 None 29.1 27.4 None PIPE12199 A3 ZPIP18000 1.5 0 1 CIRCULAR 0.024 RCP 5.7 5.3 None 0.33 9.3 9.2 None 11.0 17.4 None 11.9 19.1 None PIPE12294 A3 ZPIP15301 2 3.167 2 HORIZ_ELLIPSE 0.004 RCP 34.7 35.1 None 0.67 63.7 50.4 Both Upstream and Downstream 115.5 53.9 Both Upstream and Downstream 107.6 61.3 Both Upstream and Downstream PIPE11908 A3 ZPIP11288 4 0 1 CIRCULAR 0.005 HDPE 65.7 65.5 None 0.64 104.2 105.2 None 153.0 117.6 None 173.3 119.4 None PIPE11613 A3 ZPIP10259 7 0 1 CIRCULAR 0.013 CIPCP 314.0 314.6 None 0.49 530.0 518.4 None 784.0 702.8 Upstream 866.9 742.8 Both Upstream and Downstream PIPE11636 A3 ZPIP10269 2 0 1 CIRCULAR 0.095 RCP 28.2 28.1 None 0.4 46.3 45.1 None 69.5 70.7 Both Upstream and Downstream 79.0 80.5 Both Upstream and Downstream PIPE11650 A3 ZPIP16769 1.5 0 1 CIRCULAR 0.096 RCP 10.2 10.2 None 0.31 17.1 17.1 None 25.4 30.3 None 28.8 37.7 None CHAN10218 A3 CH10142B 0 0 1 IRREGULAR 0.005 Earthen 236.3 243.9 Downstream 1.08 417.2 249.5 Downstream 596.3 249.0 Downstream 646.6 262.3 Downstream PIPE11698 A3 ZPIP10404 3 0 1 CIRCULAR 0.013 RCP 29.5 29.8 None 0.39 50.4 50.2 None 76.0 75.4 None 86.9 88.2 None PIPE11764 A3 ZPIP10468 3 0 1 CIRCULAR 0.036 RCP 54.4 54.7 None 0.43 91.1 91.1 None 139.1 135.7 None 158.0 145.4 None PIPE12021 A3 ZPIP15405 3 0 1 CIRCULAR 0.011 RCP 38.7 38.8 None 0.56 64.1 73.9 None 98.0 79.6 Both Upstream and Downstream 111.8 79.4 Both Upstream and Downstream PIPE11872 A3 ZPIP14488 2 0 2 CIRCULAR 0.058 RCP 43.8 44.2 Both Upstream and Downstream 0.41 86.0 75.3 Both Upstream and Downstream 110.5 108.1 Both Upstream and Downstream 126.5 124.1 Both Upstream and Downstream PIPE11934 A3 ZPIP14877 2.5 0 1 CIRCULAR 0.020 RCP 30.4 28.3 None 0.49 53.1 44.7 None 83.0 64.5 Downstream 91.2 66.1 Downstream PIPE11924 A3 ZPIP14863 2.25 0 1 CIRCULAR 0.010 RCP 8.7 8.7 None 0.28 20.1 20.1 None 33.0 32.1 None 38.4 35.3 Upstream CULV10167 A3 ZCUL13915 4 8 1 RECT_CLOSED 0.003 RCP 112.3 122.8 None 0.5 170.4 196.4 None 248.3 256.4 None 261.4 277.7 None PIPE12280 A3 ZPIP15285 2 0 1 CIRCULAR 0.009 PVC 7.7 9.1 None 0.41 8.2 14.5 None 24.1 21.2 None 25.7 25.0 None PIPE11711 A3 ZPIP10415 2.5 0 1 CIRCULAR 0.038 RCP 38.8 39.0 None 0.49 66.2 69.2 None 99.3 87.5 None 112.8 89.1 Upstream PIPE12007 A3 ZPIP15333 2 0 1 CIRCULAR 0.008 RCP 8.1 8.3 None 0.41 13.4 13.5 None 20.0 19.8 None 22.7 22.9 None PIPE12247 A3 3 0 1 CIRCULAR 0.011 RCP 46.5 39.1 Both Upstream and Downstream 0.56 74.9 53.5 Both Upstream and Downstream 110.1 70.3 Both Upstream and Downstream 127.1 78.0 Both Upstream and Downstream PIPE12154 A3 ZPIP16527 3.75 2.417 1 VERT_ELLIPSE 0.005 RCP 19.8 19.2 None 0.39 32.1 32.2 None 48.4 50.0 None 57.6 54.3 Upstream PIPE12231 A3 ZPIP10469 1.5 0 1 CIRCULAR 0.137 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 31.3 None 0.0 43.3 None PIPE11984 A3 ZPIP11550 3 0 1 CIRCULAR 0.006 RCP 19.0 19.0 None 0.37 33.0 32.7 None 49.5 49.0 None 56.3 57.3 None PIPE11713 A3 ZPIP13093 4 0 1 CIRCULAR 0.003 CIPCP 17.6 14.9 None 0.22 23.7 24.4 None 37.1 65.3 None 42.6 72.1 None PIPE11914 A3 ZPIP14827 7 10 1 RECT_CLOSED 0.002 RCP 551.1 208.0 None 0.41 827.2 334.6 None 1264.2 536.7 None 1392.1 559.2 Downstream PIPE11986 A3 ZPIP15286 2 0 1 CIRCULAR 0.007 PVC 6.9 7.7 None 0.41 6.7 12.4 None 20.0 18.2 None 21.8 20.4 None PIPE12065 A3 ZPIP17502 1.5 0 1 CIRCULAR 0.002 RCP 1.9 3.1 None 0.66 4.0 5.5 None 6.7 5.8 Downstream 5.8 5.1 Both Upstream and Downstream PIPE11846 A3 ZPIP14135 2 3.167 1 HORIZ_ELLIPSE 0.003 RCP 6.6 22.7 None 0.92 13.4 30.5 None 17.3 27.3 Both Upstream and Downstream 19.1 26.8 Both Upstream and Downstream PIPE11581 A3 ZPIP12745 2 0 1 CIRCULAR 0.024 RCP 15.0 15.1 None 0.43 24.3 24.1 None 35.9 35.7 None 40.8 37.8 None PIPE11936 A3 ZPIP14879 2.5 0 1 CIRCULAR 0.023 RCP 30.4 28.2 None 0.46 52.6 44.6 None 81.2 64.0 None 88.9 66.0 None PIPE11985 A3 ZPIP15250 2 0 1 CIRCULAR 0.026 RCP 13.0 13.1 None 0.36 23.3 23.2 None 35.3 34.3 None 40.3 39.2 None PIPE11994 A3 ZPIP17422 3 0 1 CIRCULAR 0.010 RCP 28.2 27.0 None 0.4 47.9 47.6 None 73.2 64.4 None 83.9 72.2 None PIPE12035 A3 ZPIP15435 1.5 0 1 CIRCULAR 0.086 RCP 11.7 11.7 None 0.38 19.4 19.4 None 28.9 28.8 None 32.8 32.6 None PIPE12175 A3 ZPIP20004 1.5 0 1 CIRCULAR 0.018 RCP 0.0 4.7 Both Upstream and Downstream 0.33 0.0 8.3 Both Upstream and Downstream 0.0 12.9 Both Upstream and Downstream 0.0 15.1 Both Upstream and Downstream PIPE11644 A3 ZPIP10275 2.5 0 1 CIRCULAR 0.027 RCP 20.2 19.7 None 0.29 31.5 36.0 None 49.9 68.1 None 68.3 71.2 None PIPE11648 A3 ZPIP12830 7 0 1 CIRCULAR 0.017 CIPCP 319.1 309.5 Downstream 0.43 538.4 539.0 Downstream 797.2 720.8 Downstream 879.6 749.1 Downstream PIPE11686 A3 ZPIP13028 1.5 0 1 CIRCULAR 0.032 RCP 5.2 5.2 None 0.28 8.5 8.4 None 12.5 12.8 None 14.1 19.6 None PIPE11640 A3 ZPIP16766 7 0 1 CIRCULAR 0.017 CIPCP 316.1 314.2 None 0.44 533.4 546.0 None 790.3 740.0 None 873.7 745.9 Upstream PIPE11977 A3 ZPIP15245 2 0 1 CIRCULAR 0.019 RCP 10.5 10.6 None 0.33 19.0 19.0 None 28.9 28.0 None 33.1 32.7 None PIPE11643 A3 ZPIP10274 4.5 0 1 CIRCULAR 0.012 CIPCP 363.5 182.7 None 0.97 607.5 195.5 None 901.5 195.0 None 1001.8 194.5 None PIPE12052 A3 ZPIP11673 2 0 1 CIRCULAR 0.018 RCP 9.9 9.9 None 0.33 17.0 16.2 None 25.6 27.5 None 29.1 30.9 None PIPE11757 A3 ZPIP13189 1.75 0 1 CIRCULAR 0.061 RCP 12.5 12.6 None 0.32 22.4 22.4 None 34.0 36.3 None 38.9 39.8 None PIPE11603 A3 ZPIP12787 4 0 1 CIRCULAR 0.036 RCP 87.6 87.6 None 0.32 148.2 148.4 None 219.2 220.5 None 249.7 276.2 None PIPE11624 A3 ZPIP12807 3 0 1 CIRCULAR 0.022 RCP 32.3 32.4 None 0.33 57.7 57.8 None 87.9 87.6 None 100.6 99.8 None PIPE11634 A3 ZPIP16763 2.5 0 1 CIRCULAR 0.029 RCP 27.4 27.5 None 0.4 43.1 43.1 None 62.7 62.4 None 70.6 70.3 None PIPE11714 A3 ZPIP13141 3 0 1 CIRCULAR 0.008 RCP 24.5 24.1 None 0.41 40.4 38.9 None 60.5 62.0 None 67.3 58.8 None PIPE12046 A3 ZPIP15481 2.5 0 1 CIRCULAR 0.008 RCP 17.1 14.7 None 0.41 29.4 23.2 None 44.1 35.1 None 50.4 35.5 Downstream PIPE11707 A3 ZPIP10411 1.5 0 1 CIRCULAR 0.009 RCP 0.0 2.4 None 0.24 0.0 0.6 None 1.3 9.9 None 1.8 9.8 None PIPE11721 A3 ZPIP13145 1.5 0 1 CIRCULAR 0.021 RCP 5.7 5.7 None 0.38 9.3 9.7 None 14.0 15.6 None 15.9 15.0 None PIPE11768 A3 ZPIP13198 4 0 1 CIRCULAR 0.014 RCP 59.0 59.2 None 0.35 98.4 97.8 None 149.7 151.6 None 170.0 169.5 None DTCH10271 A3 DD055B 0 0 1 IRREGULAR 0.006 CONCRETE 438.4 158.5 None 0.3 735.8 267.4 None 1159.7 503.0 None 1345.7 517.5 None PIPE11517 A3 ZPIP12698 5 0 1 CIRCULAR 0.033 CIPCP 139.3 139.9 None 0.34 242.8 243.5 None 358.2 358.7 None 403.7 402.4 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 32 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE11987 A3 ZPIP17409 1.5 0 1 CIRCULAR 0.008 PVC 3.3 3.3 None 0.36 4.1 5.4 None 8.4 8.1 None 9.5 9.2 None PIPE12125 A3 ZPIP15995 4 0 3 CIRCULAR 0.005 RCP 102.8 134.6 None 0.44 185.9 208.6 None 285.1 262.1 None 329.3 302.1 None PIPE12248 A3 6.5 0 1 CIRCULAR 0.016 CIPCP 502.6 331.7 None 0.58 825.8 462.2 None 1211.3 548.9 None 1371.3 557.8 None PIPE11628 A3 ZPIP10266 5 0 1 CIRCULAR 0.032 CIPCP 140.8 141.4 None 0.35 245.3 246.1 None 362.7 365.4 None 405.7 388.1 None PIPE11695 A3 ZPIP13072 3 0 1 CIRCULAR 0.018 RCP 29.6 29.8 None 0.33 50.5 50.2 None 76.3 75.5 None 87.4 87.2 None PIPE12194 A3 PIP10788 4 0 1 CIRCULAR 0.016 RCP 70.6 66.7 None 0.36 141.3 113.6 None 214.0 158.6 None 243.4 176.3 None PIPE12243 A3 ZPIP13176 3 0 1 CIRCULAR 0.052 RCP 52.5 52.8 None 0.35 88.0 88.0 None 134.5 136.2 None 152.8 145.3 None PIPE11747 A3 ZPIP13182 1.75 0 1 CIRCULAR 0.016 RCP 5.0 5.1 None 0.25 9.8 9.8 None 15.2 15.2 None 17.5 18.8 None PIPE12293 A3 ZPIP15300 2 3.167 2 HORIZ_ELLIPSE 0.004 RCP 34.8 34.1 None 0.65 64.0 52.4 Both Upstream and Downstream 116.6 46.3 Both Upstream and Downstream 107.9 49.9 Both Upstream and Downstream PIPE11538 A3 ZPIP12713 1.5 0 1 CIRCULAR 0.018 RCP 5.1 5.1 None 0.36 8.1 8.1 None 11.9 11.9 None 13.4 13.4 None PIPE11669 A3 ZPIP12997 1.75 0 1 CIRCULAR 0.092 RCP 15.4 15.5 None 0.32 28.7 28.7 None 44.0 42.9 Downstream 50.4 45.5 Downstream PIPE11716 A3 ZPIP13144 1.5 0 1 CIRCULAR 0.010 RCP 1.1 1.1 None 0.1 1.7 2.6 None 2.6 14.7 None 2.9 9.8 None PIPE11990 A3 ZPIP11590 2 0 1 CIRCULAR 0.021 RCP 8.6 8.7 None 0.27 16.0 16.0 None 24.4 27.4 None 27.9 30.6 None PIPE11750 A3 ZPIP13185 1.5 0 1 CIRCULAR 0.070 RCP 10.4 10.4 None 0.38 16.8 16.8 None 24.8 24.0 None 28.1 25.9 None PIPE11841 A3 ZPIP17071 6.5 0 1 CIRCULAR 0.003 RCP 108.7 118.4 None 0.43 167.8 185.5 None 240.2 237.9 None 251.8 255.6 None PIPE11842 A3 ZPIP17072 6.5 0 1 CIRCULAR 0.003 RCP 109.3 117.4 None 0.43 175.4 183.7 None 266.5 236.7 None 278.3 253.6 None PIPE11843 A3 ZPIP17073 6.5 0 1 CIRCULAR 0.003 RCP 110.4 117.2 None 0.42 179.9 183.9 None 281.8 241.3 None 305.4 261.4 None PIPE11941 A3 ZPIP11352 6 0 2 CIRCULAR 0.004 RCP 186.5 229.3 None 0.41 317.1 354.4 None 461.0 451.5 None 523.1 519.2 None PIPE12178 A3 ZPIP20007 3.5 0 1 CIRCULAR 0.015 HDPE 62.8 62.9 None 0.52 99.6 109.3 None 146.0 110.9 Both Upstream and Downstream 165.1 113.2 Both Upstream and Downstream PIPE11631 A3 ZPIP16760 2.75 0 1 CIRCULAR 0.034 RCP 31.6 31.7 None 0.32 49.6 49.7 None 72.3 84.8 None 81.5 90.6 Downstream PIPE11885 A3 ZPIP14599 2 0 1 CIRCULAR 0.016 RCP 9.9 9.9 None 0.35 15.8 15.8 None 23.4 23.2 None 26.5 26.1 None PIPE11975 A3 ZPIP15243 1.5 0 1 CIRCULAR 0.013 RCP 3.8 3.8 None 0.32 6.5 6.5 None 9.8 9.8 None 11.1 11.1 None PIPE12135 A3 ZPIP11973 2.5 0 1 CIRCULAR 0.116 RCP 58.0 58.0 None 0.41 93.5 174.9 None 676.6 149.6 Both Upstream and Downstream 688.7 129.3 Both Upstream and Downstream CULV10169 A3 CUL033B 4 6 1 RECT_CLOSED 0.003 RCP 80.2 55.1 Both Upstream and Downstream 0.32 127.0 67.1 Both Upstream and Downstream 384.3 139.7 Both Upstream and Downstream 371.8 160.7 Both Upstream and Downstream PIPE12292 A3 ZPIP15299 2 3.167 2 HORIZ_ELLIPSE 0.004 RCP 39.6 36.8 None 0.71 68.6 52.9 Both Upstream and Downstream 132.4 47.6 Both Upstream and Downstream 122.0 47.9 Both Upstream and Downstream PIPE11751 A3 ZPIP13186 1.5 0 1 CIRCULAR 0.084 RCP 10.4 10.4 None 0.34 16.8 16.8 None 24.8 24.8 None 28.1 27.6 None PIPE11770 A3 ZPIP13200 4 0 1 CIRCULAR 0.015 RCP 56.5 56.8 None 0.32 94.4 94.2 None 143.8 145.2 None 163.3 159.6 None PIPE11919 A3 ZPIP14855 2 0 1 CIRCULAR 0.030 RCP 12.0 12.0 None 0.3 21.0 20.9 None 31.7 31.4 None 36.1 35.7 None PIPE11563 A3 ZPIP16736 3.5 0 1 CIRCULAR 0.043 RCP 77.2 74.9 None 0.36 129.7 122.8 None 193.8 169.0 None 220.5 187.6 None PIPE11632 A3 ZPIP16761 6.5 0 1 CIRCULAR 0.013 CIPCP 168.7 169.4 None 0.32 290.0 290.3 None 428.4 461.8 Downstream 472.5 472.0 Both Upstream and Downstream PIPE11988 A3 ZPIP17410 2 0 1 CIRCULAR 0.007 PVC 6.3 6.3 None 0.34 6.1 10.1 None 15.9 15.0 None 17.6 16.9 None PIPE12048 A3 ZPIP15483 1.5 0 1 CIRCULAR 0.015 RCP 7.2 4.9 None 0.39 12.2 6.8 None 18.4 9.4 None 20.9 11.4 None PIPE11728 A3 ZPIP13168 2 0 1 CIRCULAR 0.034 RCP 13.2 13.2 None 0.32 21.6 21.6 None 32.7 33.9 Downstream 37.3 37.4 Downstream PIPE11763 A3 ZPIP13195 1.5 0 1 CIRCULAR 0.008 RCP 3.1 3.1 None 0.33 4.7 5.3 None 6.0 7.3 None 7.0 8.3 None PIPE12032 A3 ZPIP15432 1.5 0 1 CIRCULAR 0.006 RCP 0.1 0.1 None 0.01 0.2 0.2 None 0.3 7.0 None 0.3 7.4 None PIPE12146 A3 ZPIP17845 4 0 1 CIRCULAR 0.001 RCP 18.7 15.8 None 0.32 21.3 24.9 None 33.4 37.9 None 37.6 43.9 None PIPE12158 A3 ZPIP12240 2 0 1 CIRCULAR 0.032 RCP 12.0 12.0 None 0.3 21.0 20.9 None 31.7 31.3 None 36.1 35.7 None PIPE12216 A3 ZPIP15200 6 0 2 CIRCULAR 0.005 RCP 187.2 230.0 None 0.39 318.2 356.3 None 463.0 458.9 None 525.4 520.8 None PIPE11626 A3 ZPIP12810 5.5 0 1 CIRCULAR 0.008 RCP 106.7 104.9 None 0.35 176.5 169.5 None 261.0 237.9 None 292.0 265.1 None PIPE11670 A3 ZPIP12998 1.75 0 1 CIRCULAR 0.028 RCP 7.3 7.3 None 0.28 13.6 13.6 None 20.9 20.9 None 24.0 23.3 None PIPE11672 A3 ZPIP16814 2 0 1 CIRCULAR 0.048 RCP 17.1 17.2 None 0.35 26.9 26.9 None 39.3 38.9 None 44.2 43.8 None PIPE11852 A3 ZPIP11038 2 0 1 CIRCULAR 0.005 RCP 5.0 4.9 None 0.31 8.4 8.0 None 12.5 12.6 None 13.1 13.9 None CHAN10288 A3 CH050B 0 0 1 IRREGULAR 0.003 Concrete 87.8 111.3 None 0.33 144.8 170.8 None 203.1 206.6 None 228.0 294.7 None PIPE11521 A3 ZPIP12702 5 0 1 CIRCULAR 0.039 CIPCP 140.7 141.3 None 0.32 245.6 246.2 None 363.1 369.6 None 404.1 386.8 Downstream PIPE11565 A3 ZPIP10227 3.5 0 1 CIRCULAR 0.043 RCP 75.1 72.8 None 0.35 126.4 119.6 None 189.1 164.3 None 215.1 182.3 None PIPE12047 A3 ZPIP15482 2.5 0 1 CIRCULAR 0.010 RCP 17.0 14.7 None 0.36 29.3 22.6 None 43.8 35.5 None 49.9 35.5 None PIPE12050 A3 ZPIP17470 2 0 1 CIRCULAR 0.017 RCP 9.9 9.9 None 0.34 17.0 16.2 None 25.5 24.3 None 29.1 25.6 None PIPE12145 A3 ZPIP16518 4 0 1 CIRCULAR 0.001 HDPE 31.6 15.3 Upstream 0.31 30.0 25.5 Both Upstream and Downstream 52.0 37.8 Both Upstream and Downstream 50.9 42.8 Both Upstream and Downstream PIPE12315 A3 ZPIP16492 10 10 1 RECT_OPEN 0.004 RCP 520.0 138.0 None 0.25 899.8 252.9 None 1252.4 483.0 Downstream 1369.1 486.2 Downstream PIPE11662 A3 ZPIP12993 1.75 0 1 CIRCULAR 0.086 RCP 15.5 15.5 None 0.33 28.7 28.7 None 44.1 39.8 Both Upstream and Downstream 50.5 40.1 Both Upstream and Downstream PIPE11807 A3 ZPIP13885 3 0 1 CIRCULAR 0.023 RCP 85.2 52.4 None 0.52 139.6 64.5 None 202.8 80.7 None 233.8 87.8 Downstream PIPE11923 A3 ZPIP11341 1.5 0 1 CIRCULAR 0.005 RCP 1.8 1.8 None 0.24 2.8 2.8 None 4.0 6.5 None 4.5 6.4 None PIPE11943 A3 ZPIP14884 3 0 1 CIRCULAR 0.013 RCP 26.7 26.8 None 0.35 41.6 41.7 None 61.7 59.2 None 71.8 65.3 None PIPE12227 A3 ZPIP10264 1.5 0 1 CIRCULAR 0.326 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 49.0 None 0.0 51.7 Both Upstream and Downstream PIPE12289 A3 ZPIP11573 1.5 0 1 CIRCULAR 0.007 RCP 0.0 0.3 None 0.03 2.0 3.9 Both Upstream and Downstream 16.1 8.7 Both Upstream and Downstream 23.2 7.8 Both Upstream and Downstream PIPE11585 A3 ZPIP10234 3.5 0 1 CIRCULAR 0.043 RCP 73.3 70.9 None 0.34 123.4 116.7 None 184.8 160.2 None 210.2 177.8 None PIPE11590 A3 ZPIP16743 1.5 0 1 CIRCULAR 0.026 RCP 3.2 3.2 None 0.19 5.1 5.1 None 7.4 7.4 None 8.3 14.2 None PIPE11594 A3 ZPIP12781 5.5 0 1 CIRCULAR 0.011 RCP 116.1 115.0 None 0.32 191.5 184.4 None 282.7 307.5 Downstream 317.1 305.4 Both Upstream and Downstream PIPE11735 A3 ZPIP13172 1.5 0 1 CIRCULAR 0.036 RCP 6.2 6.3 None 0.31 10.0 10.0 None 14.8 14.9 None 16.8 16.9 None PIPE12020 A3 ZPIP11637 3 0 1 CIRCULAR 0.026 RCP 33.0 33.1 None 0.31 54.9 54.9 None 84.3 82.5 Downstream 96.3 92.2 Downstream PIPE12029 A3 ZPIP11649 1.5 0 1 CIRCULAR 0.077 RCP 8.9 8.9 None 0.3 14.9 14.8 None 22.1 21.9 None 25.1 24.9 None PIPE12181 A3 ZPIP14888 4 0 1 CIRCULAR 0.012 RCP 44.1 44.7 None 0.28 76.6 77.9 None 118.3 119.2 None 134.7 135.4 None PIPE12192 A3 PIP10682 4 0 1 CIRCULAR 0.007 RCP 25.1 22.8 None 0.19 56.6 49.9 None 86.9 89.6 None 100.2 103.1 None PIPE12219 A3 PIP10784 4 0 1 CIRCULAR 0.009 RCP 30.8 28.8 None 0.21 67.4 59.8 None 101.8 101.2 None 117.2 116.0 None PIPE11715 A3 ZPIP13143 2.25 0 1 CIRCULAR 0.027 RCP 17.5 17.5 None 0.35 29.0 27.9 None 43.6 50.0 None 49.7 42.4 None PIPE11819 A3 ZPIP10843 2 0 1 CIRCULAR 0.040 RCP 10.9 10.9 None 0.24 21.4 21.3 None 33.3 33.2 None 38.3 38.2 None PIPE11991 A3 ZPIP15320 2 0 1 CIRCULAR 0.025 RCP 8.6 8.7 None 0.24 15.9 16.0 None 24.4 24.9 None 28.0 30.1 None PIPE12067 A3 ZPIP17504 1.5 0 1 CIRCULAR 0.002 RCP 3.1 3.0 None 0.61 6.4 4.9 None 10.4 4.3 Both Upstream and Downstream 9.4 4.2 Both Upstream and Downstream PIPE11731 A3 ZPIP10459 1.5 0 1 CIRCULAR 0.024 RCP 0.0 0.0 None 0 0.0 0.1 None 0.0 12.5 Downstream 0.0 13.3 Both Upstream and Downstream PIPE11945 A3 ZPIP14886 3 0 1 CIRCULAR 0.014 RCP 27.2 27.4 None 0.34 42.4 42.5 None 62.8 60.2 None 73.0 66.4 None PIPE12191 A3 PIP10681 4 0 1 CIRCULAR 0.008 RCP 25.1 22.8 None 0.18 56.8 49.9 None 87.1 88.6 None 100.3 103.1 None PIPE12213 A3 ZPIP12169 2.5 0 1 CIRCULAR 0.015 RCP 9.9 13.4 None 0.27 18.1 25.0 None 34.4 37.4 Both Upstream and Downstream 34.6 41.6 Both Upstream and Downstream PIPE11638 A3 ZPIP12818 1.5 0 1 CIRCULAR 0.016 RCP 4.3 4.3 None 0.32 6.6 6.6 None 9.6 9.6 None 10.8 10.8 None PIPE11756 A3 ZPIP10467 1.5 0 1 CIRCULAR 0.009 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 4.0 None 0.0 8.1 None PIPE11835 A3 ZPIP13971 1.5 0 1 CIRCULAR 0.007 RCP 2.7 2.7 None 0.31 4.3 4.3 None 6.3 6.3 None 7.1 7.1 None PIPE11944 A3 ZPIP14885 3 0 1 CIRCULAR 0.014 RCP 26.8 26.9 None 0.34 41.7 41.8 None 61.9 59.3 None 72.0 65.5 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 33 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
CHAN10223 A3 CH10142D 0 0 1 IRREGULAR 0.006 Earthen 198.5 225.6 None 0.48 288.4 358.6 Upstream 276.1 413.6 Upstream 262.9 384.4 Upstream CHAN10312 A3 CH062B 6 25 1 TRAPEZOIDAL 0.003 Earthen 1.0 86.0 None 0.11 2.4 342.9 None 3.9 568.2 None 4.5 632.2 None PIPE11608 A3 ZPIP10255 3 0 1 CIRCULAR 0.047 RCP 37.9 38.0 None 0.26 67.0 67.2 None 101.3 101.6 None 115.5 116.2 None PIPE11703 A3 ZPIP10409 1.5 0 1 CIRCULAR 0.050 RCP 5.9 5.9 None 0.25 10.4 10.4 None 15.7 15.7 None 17.9 19.1 None PIPE12041 A3 ZPIP15438 1.5 0 1 CIRCULAR 0.064 RCP 7.6 7.6 None 0.29 12.8 12.8 None 19.1 19.1 None 21.7 21.5 None PIPE11527 A3 ZPIP12705 1.5 0 1 CIRCULAR 0.095 RCP 5.0 5.0 None 0.15 12.1 12.1 None 19.6 19.6 None 22.9 26.0 None PIPE11710 A3 ZPIP10414 5.5 0 1 CIRCULAR 0.018 CIPCP 399.5 215.2 None 0.56 666.4 255.6 None 982.0 308.4 None 1078.3 307.9 None PIPE11578 A3 ZPIP10231 2 0 1 CIRCULAR 0.052 RCP 16.6 16.7 None 0.32 26.8 26.2 Downstream 39.6 39.2 Downstream 44.9 40.8 Downstream PIPE11678 A3 ZPIP13023 3 0 1 CIRCULAR 0.010 RCP 16.6 14.0 None 0.21 27.4 24.3 None 40.7 44.9 None 46.0 53.4 None PIPE11968 A3 ZPIP15193 7 10 1 RECT_CLOSED 0.003 RCP 451.8 172.9 None 0.24 778.0 284.3 None 1617.7 548.1 None 1328.2 562.3 None PIPE12054 A3 ZPIP17485 2.25 0 1 CIRCULAR 0.023 RCP 7.1 7.1 None 0.15 13.8 13.8 None 21.6 31.8 None 24.9 36.6 None PIPE11512 A3 ZPIP12696 1.5 0 1 CIRCULAR 0.022 RCP 4.4 4.4 None 0.28 7.2 7.2 None 10.7 10.7 None 12.1 12.1 None PIPE11775 A3 ZPIP13204 1.5 0 1 CIRCULAR 0.094 RCP 8.7 8.7 None 0.27 14.8 14.8 None 22.3 22.3 None 25.3 25.3 None PIPE11779 A3 ZPIP13221 2 0 2 CIRCULAR 0.036 RCP 27.4 27.5 None 0.32 43.0 43.1 None 62.6 68.7 None 70.6 67.5 None PIPE11816 A3 ZPIP13906 3 0 1 CIRCULAR 0.014 RCP 19.5 19.6 None 0.25 35.1 35.2 None 53.4 53.4 None 61.1 61.1 None PIPE11951 A3 ZPIP11391 5 0 1 CIRCULAR 0.002 RCP 33.1 36.1 None 0.28 52.4 57.9 None 84.2 89.1 None 81.3 101.0 None PIPE11954 A3 ZPIP15153 3.5 0 1 CIRCULAR 0.012 RCP 38.0 32.4 None 0.29 80.1 59.0 None 114.5 85.1 None 130.8 87.2 None PIPE12081 A3 ZPIP15854 2.5 0 1 CIRCULAR 0.005 HDPE 8.3 8.3 None 0.3 13.9 13.2 None 21.9 19.3 None 47.6 21.8 None PIPE11666 A3 ZPIP10365 1.75 0 1 CIRCULAR 0.030 RCP 6.0 6.1 None 0.22 9.5 9.6 None 13.9 17.7 None 15.7 21.1 None CHAN10287 A3 CH050B 0 0 1 IRREGULAR 0.003 Concrete 89.6 111.5 None 0.33 145.0 171.8 None 203.4 206.7 None 228.1 258.5 None PIPE12278 A3 ZPIP17297 2.5 0 1 CIRCULAR 0.005 RCP 7.9 7.9 None 0.27 12.8 12.8 None 19.0 17.8 None 19.0 22.6 None PIPE11551 A3 ZPIP10222 1.5 0 1 CIRCULAR 0.018 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 9.5 None 0.0 10.7 None PIPE12019 A3 ZPIP11636 1.5 0 1 CIRCULAR 0.044 RCP 0.0 0.0 None 0 0.0 19.9 None 0.0 18.0 Both Upstream and Downstream 0.0 16.5 Both Upstream and Downstream PIPE12193 A3 PIP10783 4 0 1 CIRCULAR 0.010 RCP 26.2 24.0 None 0.17 59.0 51.8 None 90.1 92.1 None 103.9 105.8 None CULV10171 A3 ZCUL16856 6 14 1 RECT_CLOSED 0.002 RCP 446.0 172.2 None 0.23 755.5 281.8 None 1570.6 534.9 None 1591.5 564.2 None PIPE11580 A3 ZPIP12744 1.5 0 1 CIRCULAR 0.009 RCP 2.8 2.8 None 0.28 4.5 4.5 None 6.5 6.6 None 7.4 7.5 None PIPE11622 A3 ZPIP12805 1.5 0 1 CIRCULAR 0.046 RCP 0.0 0.0 None 0 0.0 8.9 None 0.9 16.6 None 1.2 16.7 Both Upstream and Downstream PIPE12000 A3 ZPIP11594 2 0 1 CIRCULAR 0.028 RCP 9.9 10.1 None 0.26 16.4 16.5 None 24.4 24.3 None 27.8 28.0 None PIPE12180 A3 ZPIP20018 4 0 2 CIRCULAR 0.087 RCP 98.7 126.7 None 0.15 164.3 193.1 None 232.4 233.1 Upstream 261.9 623.4 Upstream CHAN10277 A3 0 0 1 IRREGULAR 0.012 Concrete 5.8 5.3 None 0.31 7.5 8.9 None 9.5 12.1 None 10.2 12.6 None PIPE11774 A3 ZPIP13203 1.5 0 1 CIRCULAR 0.108 RCP 8.6 8.7 None 0.25 14.8 14.8 None 22.3 22.3 None 25.3 25.3 None PIPE11909 A3 ZPIP14786 2.5 0 1 CIRCULAR 0.010 HDPE 9.2 9.2 None 0.23 15.7 15.8 None 23.6 23.7 None 26.9 29.4 None PIPE12014 A3 ZPIP15400 2.5 0 1 CIRCULAR 0.045 RCP 28.8 33.3 None 0.38 38.7 57.5 None 39.5 62.4 Downstream 39.9 63.1 Downstream CULV10177 A3 ZCUL069A 3 8 3 RECT_CLOSED 0.006 RCP 508.6 172.7 None 0.25 781.1 262.8 None 1175.5 485.5 Both Upstream and Downstream 1359.7 500.2 Both Upstream and Downstream PIPE11599 A3 ZPIP10251 4.5 0 1 CIRCULAR 0.045 RCP 102.5 102.9 None 0.25 177.2 177.6 None 260.5 261.8 None 287.7 298.4 None PIPE11607 A3 ZPIP16757 3 0 1 CIRCULAR 0.050 RCP 39.2 39.2 None 0.26 64.2 64.2 None 94.3 94.3 None 107.9 107.9 None PIPE11671 A3 ZPIP16813 2 0 1 CIRCULAR 0.072 RCP 17.1 17.2 None 0.28 27.0 27.0 None 39.3 39.0 None 44.3 43.8 None PIPE11699 A3 ZPIP10405 3 0 1 CIRCULAR 0.017 RCP 20.4 20.5 None 0.24 35.2 35.5 None 53.5 53.9 None 61.2 62.0 None PIPE11844 A3 ZPIP10893 5 0 1 CIRCULAR 0.003 RCP 34.0 35.5 None 0.26 52.5 57.4 None 80.9 86.7 None 78.8 98.5 None CHAN10303 A3 CH001 0 0 1 IRREGULAR 0.008 Concrete 510.0 184.8 None 0.27 834.3 262.5 None 1174.4 485.5 Both Upstream and Downstream 1358.0 500.1 Both Upstream and Downstream CULV10174 A3 ZCUL064A 6 14 1 RECT_CLOSED 0.002 RCP 438.0 167.3 None 0.21 741.7 277.4 None 1639.2 542.1 None 1671.4 562.7 None PIPE11595 A3 ZPIP12782 5 0 1 CIRCULAR 0.066 CIPCP 136.7 137.3 None 0.24 238.6 239.2 None 351.7 353.6 None 396.5 413.7 None PIPE11709 A3 ZPIP13090 5.5 0 1 CIRCULAR 0.021 CIPCP 400.5 215.6 None 0.51 668.1 259.2 None 984.8 297.4 None 1079.5 300.2 None PIPE11918 A3 ZPIP11339 2 0 1 CIRCULAR 0.044 RCP 11.2 11.1 None 0.24 19.6 19.5 None 29.6 29.4 None 33.8 33.6 None PIPE12061 A3 ZPIP15556 2 0 1 CIRCULAR 0.008 RCP 0.3 0.2 None 0.01 0.4 11.9 None 0.5 13.7 None 0.5 14.8 None PIPE12217 A3 ZCUL16848 6 0 1 CIRCULAR 0.020 RCP 164.6 175.2 None 0.29 271.6 284.3 None 406.1 393.5 Downstream 465.2 425.7 Both Upstream and Downstream PIPE12282 A3 ZPIP11570 1.5 0 1 CIRCULAR 0.008 RCP 0.2 6.7 None 0.72 1.1 5.1 Both Upstream and Downstream 0.7 6.5 Both Upstream and Downstream 0.6 6.6 Both Upstream and Downstream PIPE11610 A3 ZPIP10257 2.5 0 1 CIRCULAR 0.043 RCP 22.7 22.8 None 0.27 35.8 35.8 None 52.1 51.8 None 58.7 59.6 None PIPE11971 A3 ZPIP15199 6 0 2 CIRCULAR 0.008 RCP 186.5 229.1 None 0.31 317.2 355.1 None 460.9 452.2 None 523.9 518.6 None PIPE12063 A3 ZPIP15558 2.5 0 1 CIRCULAR 0.006 RCP 9.6 9.5 None 0.3 17.6 19.0 None 29.1 20.1 None 32.6 21.8 None PIPE12152 A3 ZPIP16525 1.5 0 1 CIRCULAR 0.025 RCP 4.5 4.6 None 0.27 7.3 7.3 None 10.9 11.4 None 12.2 11.7 None CHAN10279 A3 0 0 1 IRREGULAR 0.012 Concrete 4.7 5.1 None 0.29 7.5 8.1 None 9.0 11.5 None 9.4 12.2 None PIPE12279 A3 ZPIP17298 2.5 0 1 CIRCULAR 0.037 Unknown 56.2 44.8 Both Upstream and Downstream 0.57 94.9 48.9 Both Upstream and Downstream 193.5 51.6 Both Upstream and Downstream 177.9 55.1 Both Upstream and Downstream PIPE11546 A3 ZPIP12718 4.5 0 1 CIRCULAR 0.029 RCP 94.4 92.3 None 0.28 157.3 149.5 None 233.9 207.9 None 265.4 231.8 None PIPE11773 A3 ZPIP10474 1.5 0 1 CIRCULAR 0.119 RCP 8.6 8.7 None 0.24 14.8 14.8 None 22.2 24.7 None 25.3 25.2 None PIPE11867 A3 ZPIP14310 1.5 0 1 CIRCULAR 0.016 RCP 2.0 2.1 None 0.15 5.7 3.2 None 9.4 10.6 None 12.5 9.2 None CHAN10306 A3 CH062A 6 25 1 TRAPEZOIDAL 0.006 Earthen 0.0 111.1 None 0.11 0.0 374.7 None 0.0 625.7 None 0.0 701.8 None CHAN10307 A3 CH062A 6 25 1 TRAPEZOIDAL 0.006 Earthen 0.0 104.2 None 0.1 0.0 375.1 None 0.0 624.6 None 0.0 701.1 None CHAN10308 A3 CH062A 6 25 1 TRAPEZOIDAL 0.006 Earthen 0.0 96.6 None 0.09 0.0 371.4 None 0.0 623.9 None 0.0 700.0 None PIPE11652 A3 ZPIP16643 1.5 0 1 CIRCULAR 0.140 RCP 6.7 6.7 None 0.17 10.7 12.2 None 15.7 23.6 None 17.7 26.6 None PIPE11693 A3 ZPIP10400 1.5 0 1 CIRCULAR 0.060 RCP 5.7 5.7 None 0.22 9.1 9.1 None 12.0 17.3 None 14.2 17.5 None PIPE11755 A3 ZPIP10466 1.5 0 1 CIRCULAR 0.073 RCP 7.3 7.3 None 0.26 11.7 11.7 None 17.2 17.2 None 19.4 19.4 None PIPE11771 A3 ZPIP13201 2 0 1 CIRCULAR 0.023 RCP 5.9 5.9 None 0.17 9.4 9.4 None 13.9 16.6 None 15.8 23.1 None PIPE11776 A3 ZPIP13205 2.5 0 1 CIRCULAR 0.107 RCP 38.9 39.1 None 0.29 66.3 68.9 None 99.4 87.6 None 113.1 90.9 Downstream PIPE11861 A3 ZPIP14303 1.5 0 1 CIRCULAR 0.007 RCP 1.9 1.9 None 0.21 3.0 3.0 None 5.3 4.4 None 5.3 5.9 None PIPE11571 A3 ZPIP12737 3 0 1 CIRCULAR 0.049 RCP 32.2 32.4 None 0.22 57.7 57.8 None 88.1 87.8 None 100.7 99.9 None PIPE11724 A3 ZPIP13164 1.5 0 1 CIRCULAR 0.006 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 7.2 None 0.0 5.5 None PIPE11949 A3 ZPIP11374 3 0 1 CIRCULAR 0.002 RCP 6.4 7.0 None 0.24 9.8 11.0 Downstream 13.4 17.7 Downstream 13.6 20.1 Both Upstream and Downstream PIPE12034 A3 ZPIP15434 2 0 1 CIRCULAR 0.055 RCP 12.7 12.7 None 0.24 21.3 21.4 None 32.0 32.0 None 36.4 35.6 Downstream PIPE12071 A3 ZPIP11854 3 0 1 CIRCULAR 0.006 HDPE 12.6 12.6 None 0.25 19.9 20.3 None 20.7 30.2 None 36.4 34.3 None PIPE12106 A3 ZPIP15874 2.5 0 1 CIRCULAR 0.005 HDPE 12.2 7.3 None 0.25 15.9 11.6 None 19.3 17.2 None 21.3 19.5 None PIPE12114 A3 ZPIP15878 2.5 0 1 CIRCULAR 0.006 RCP 8.2 8.3 None 0.26 13.9 13.2 None 23.3 19.3 None 48.0 21.8 None PIPE12115 A3 ZPIP15879 2.5 0 1 CIRCULAR 0.006 RCP 8.1 8.3 None 0.26 13.9 13.2 None 25.0 19.3 None 48.4 21.8 None PIPE12224 A3 2.5 0 1 CIRCULAR 0.024 RCP 17.1 14.7 None 0.23 29.5 23.7 None 46.1 41.9 None 50.7 42.9 Both Upstream and Downstream CHAN10280 A3 0 0 1 IRREGULAR 0.012 Concrete 4.2 4.9 None 0.25 7.4 7.4 None 9.1 11.0 None 9.2 12.8 None PIPE11520 A3 ZPIP12701 1.5 0 1 CIRCULAR 0.256 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 35.4 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 34 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE11532 A3 ZPIP10215 4 0 1 CIRCULAR 0.064 RCP 82.2 82.3 None 0.23 139.8 139.9 None 208.0 209.1 None 237.1 238.4 None PIPE11604 A3 ZPIP12788 4 0 1 CIRCULAR 0.061 RCP 80.5 80.5 None 0.23 136.9 137.0 None 204.4 204.7 None 233.0 233.6 None PIPE11677 A3 ZPIP13002 2 0 1 CIRCULAR 0.045 RCP 12.4 12.4 None 0.26 19.5 19.4 None 28.4 28.2 None 32.1 31.8 None PIPE11758 A3 ZPIP13190 1.5 0 1 CIRCULAR 0.010 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.2 None 0.0 6.9 None PIPE12239 A3 ZPIP14861 5.5 0 2 CIRCULAR 0.004 CIPCP 174.1 114.0 None 0.31 189.9 162.3 None 327.6 218.7 None 331.8 244.1 None CHAN10309 A3 CH062A 6 25 1 TRAPEZOIDAL 0.006 Earthen 0.0 88.4 None 0.09 0.0 353.9 None 0.0 613.3 None 0.0 659.6 None PIPE12318 A3 PIP16815 2 0 1 CIRCULAR 0.005 RCP 3.6 3.6 Both Upstream and Downstream 0.23 6.8 5.5 Both Upstream and Downstream 10.7 9.0 Both Upstream and Downstream 11.5 10.2 Both Upstream and Downstream PIPE11530 A3 ZPIP12708 1.5 0 1 CIRCULAR 0.021 RCP 3.7 3.8 None 0.25 6.0 6.0 None 8.7 8.7 None 9.8 9.9 None PIPE11586 A3 ZPIP10235 2 0 1 CIRCULAR 0.053 RCP 15.2 20.0 None 0.38 24.2 34.1 Downstream 35.5 34.9 Both Upstream and Downstream 40.1 33.9 Both Upstream and Downstream PIPE11684 A3 ZPIP13026 1.5 0 1 CIRCULAR 0.015 RCP 3.2 2.9 None 0.23 5.8 5.3 None 7.0 7.3 None 9.4 8.2 None CULV10153 A3 CUL055B 3.583 2.25 1 ARCH 0.046 CMP 16.8 14.5 None 0.16 37.7 28.2 None 48.3 65.5 None 56.1 57.3 None PIPE12095 A3 ZPIP15866 4 0 1 CIRCULAR 0.005 RCP 32.0 25.6 None 0.25 86.2 42.3 Both Upstream and Downstream 73.0 72.3 Both Upstream and Downstream 88.3 66.9 Both Upstream and Downstream PIPE12260 A3 ZPIP14000 4.5 0 1 CIRCULAR 0.003 RCP 24.4 24.2 None 0.24 38.7 39.3 None 53.6 56.7 None 51.3 65.5 None PIPE11519 A3 ZPIP12700 4.5 0 1 CIRCULAR 0.058 RCP 104.6 105.1 None 0.22 180.8 181.2 None 265.6 266.9 None 295.2 305.4 None PIPE11550 A3 ZPIP10221 3 0 1 CIRCULAR 0.064 RCP 39.8 39.8 None 0.24 64.9 64.9 None 95.3 95.3 None 109.1 109.1 None PIPE11560 A3 ZPIP12727 1.5 0 1 CIRCULAR 0.021 RCP 3.7 3.7 None 0.24 5.9 5.9 None 8.7 8.6 None 9.7 9.7 None PIPE11733 A3 ZPIP13170 2 0 1 CIRCULAR 0.020 RCP 5.0 5.0 None 0.16 10.1 10.1 None 18.0 18.0 None 20.5 20.5 None PIPE11792 A3 ZPIP10786 2 0 2 CIRCULAR 0.018 CMP 8.0 8.0 None 0.24 12.9 13.0 None 15.1 18.3 Downstream 17.2 21.2 Downstream PIPE12273 A3 ZPIP14484 2 0 1 CIRCULAR 0.005 RCP 3.1 3.6 Both Upstream and Downstream 0.23 6.8 4.9 Both Upstream and Downstream 11.0 8.7 Both Upstream and Downstream 11.5 9.9 Both Upstream and Downstream CULV10170 A3 ZCUL16855 6 14 1 RECT_CLOSED 0.003 RCP 446.5 172.9 None 0.2 756.3 281.9 None 1554.3 538.0 None 1577.2 556.9 None PIPE11845 A3 ZPIP10959 2 3.167 1 HORIZ_ELLIPSE 0.004 RCP 5.4 14.3 None 0.56 12.1 20.0 Downstream 18.0 16.4 Both Upstream and Downstream 19.1 15.9 Both Upstream and Downstream PIPE11989 A3 ZPIP11589 2 0 1 CIRCULAR 0.027 RCP 7.0 7.0 None 0.19 13.1 13.1 None 20.0 20.0 None 23.0 23.4 None CULV10178 A3 ZCUL069A 3 8 3 RECT_CLOSED 0.008 RCP 478.5 164.8 None 0.22 689.2 249.1 None 1129.6 468.1 Both Upstream and Downstream 1302.5 478.6 Both Upstream and Downstream CHAN10314 A3 CH062B 6 25 1 TRAPEZOIDAL 0.006 Earthen 0.5 65.3 None 0.06 1.5 311.3 None 2.5 565.8 None 3.0 631.1 None CHAN10317 A3 CH062B 6 25 1 TRAPEZOIDAL 0.006 Earthen 0.5 53.5 None 0.05 1.3 286.9 None 2.3 563.4 None 2.7 630.1 None CHAN10319 A3 CH062B 6 25 1 TRAPEZOIDAL 0.006 Earthen 2.3 49.0 None 0.05 5.0 271.5 None 8.5 566.6 None 10.1 634.9 None CHAN10320 A3 CH062B 6 25 1 TRAPEZOIDAL 0.006 Earthen 1.9 46.5 None 0.05 4.4 261.7 None 11.0 565.2 None 19.7 634.6 None CHAN10321 A3 CH062B 6 25 1 TRAPEZOIDAL 0.006 Earthen 1.8 45.8 None 0.05 5.0 260.9 None 35.3 562.9 None 86.9 634.1 None PIPE11536 A3 ZPIP12711 3 0 1 CIRCULAR 0.079 RCP 37.8 37.9 None 0.2 66.8 67.0 None 101.0 101.3 None 115.2 115.9 None CULV10138 A3 CUL066 3.5 8.5 2 RECT_CLOSED 0.007 RCP 192.7 219.3 None 0.34 333.8 360.2 Both Upstream and Downstream 372.5 421.7 Both Upstream and Downstream 284.3 395.2 Both Upstream and Downstream PIPE11870 A3 ZPIP11138 2.75 0 1 CIRCULAR 0.051 CSP 14.0 14.1 Both Upstream and Downstream 0.22 27.1 25.9 Both Upstream and Downstream 35.4 34.7 Both Upstream and Downstream 40.6 39.9 Both Upstream and Downstream CULV10144 A3 ZCUL14827 7 10 1 RECT_CLOSED 0.005 RCP 412.4 230.5 Both Upstream and Downstream 0.25 794.7 363.4 Both Upstream and Downstream 1284.6 530.7 Both Upstream and Downstream 1421.9 564.6 Both Upstream and Downstream PIPE11888 A3 ZPIP17211 2 0 1 CIRCULAR 0.035 RCP 9.9 9.9 None 0.23 15.8 15.8 None 61.1 23.2 None 148.6 26.1 None PIPE11952 A3 ZPIP11497 3 0 2 CIRCULAR 0.005 RCP 30.6 26.3 None 0.29 49.6 39.8 None 71.7 50.9 None 81.8 55.8 None CULV10149 A3 ZCUL16854 6 14 1 RECT_CLOSED 0.003 RCP 447.1 172.8 None 0.2 757.8 282.0 None 1692.2 531.6 None 1373.8 548.0 None PIPE12088 A3 ZPIP11866 2 0 1 CIRCULAR 0.005 HDPE 3.6 3.6 None 0.23 15.4 5.7 None 15.7 8.4 None 30.3 9.5 None PIPE12099 A3 ZPIP17587 7 10 1 RECT_CLOSED 0.005 RCP 421.0 235.4 Both Upstream and Downstream 0.26 794.4 385.6 Both Upstream and Downstream 1282.1 533.5 Both Upstream and Downstream 1421.2 569.1 Both Upstream and Downstream PIPE12117 A3 ZPIP17588 4 0 1 CIRCULAR 0.001 RCP 19.1 10.8 None 0.22 23.1 17.2 None 28.3 25.4 None 31.7 30.3 None PIPE12211 A3 ZPIP14865 1.5 0 1 CIRCULAR 0.004 RCP 1.5 1.5 None 0.22 2.5 2.5 None 3.7 3.7 None 4.3 4.3 None CHAN10313 A3 CH062B 6 25 1 TRAPEZOIDAL 0.006 Earthen 0.6 69.6 None 0.07 1.6 328.7 None 2.7 569.3 None 3.2 632.3 None CHAN10318 A3 CH062B 6 25 1 TRAPEZOIDAL 0.006 Earthen 0.4 50.6 None 0.05 1.2 279.7 None 2.2 562.7 None 2.6 629.8 None PIPE11612 A3 ZPIP12795 3 0 1 CIRCULAR 0.043 RCP 26.2 26.3 None 0.19 48.0 48.0 None 73.5 73.5 None 84.3 84.4 None PIPE11860 A3 ZPIP11044 1.5 0 1 CIRCULAR 0.007 RCP 1.8 1.8 None 0.21 4.0 2.9 None 8.7 4.2 None 8.0 5.3 None CULV10150 A3 ZCUL066 3.5 8.5 2 RECT_CLOSED 0.007 RCP 191.8 218.5 None 0.34 336.2 359.4 Both Upstream and Downstream 380.9 420.2 Both Upstream and Downstream 291.4 393.7 Both Upstream and Downstream PIPE12094 A3 ZPIP11869 7 10 1 RECT_CLOSED 0.005 RCP 454.8 229.7 None 0.25 789.2 361.4 Both Upstream and Downstream 1271.0 533.2 Both Upstream and Downstream 1410.6 556.9 Both Upstream and Downstream CHAN10305 A3 CH062A 6 25 1 TRAPEZOIDAL 0.008 Earthen 0.0 117.2 Upstream 0.1 0.0 380.3 Upstream 0.0 631.0 Upstream 0.0 705.0 Upstream CHAN10316 A3 CH062B 6 25 1 TRAPEZOIDAL 0.006 Earthen 0.5 56.6 None 0.06 1.3 296.5 None 2.3 564.1 None 2.8 630.4 None PIPE11691 A3 ZPIP16846 1.5 0 1 CIRCULAR 0.019 RCP 1.1 5.1 None 0.35 1.5 4.9 None 1.5 9.5 None 1.6 8.8 Downstream PIPE11729 A3 ZPIP10457 1.5 0 1 CIRCULAR 0.031 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 9.4 None 0.0 11.0 None PIPE11765 A3 ZPIP10470 4 0 1 CIRCULAR 0.036 RCP 64.5 64.7 None 0.24 107.2 107.6 None 162.6 160.9 None 184.6 164.3 None PIPE11767 A3 ZPIP13197 2 0 1 CIRCULAR 0.020 RCP 5.8 5.8 None 0.18 9.4 9.4 None 13.8 16.6 None 15.6 19.2 None PIPE11963 A3 ZPIP11519 7 10 1 RECT_CLOSED 0.005 RCP 490.7 210.0 None 0.23 820.6 337.7 Downstream 1267.0 529.2 Both Upstream and Downstream 1393.3 550.9 Both Upstream and Downstream PIPE12044 A3 ZPIP11655 2.5 0 1 CIRCULAR 0.012 RCP 10.0 10.0 None 0.22 16.1 16.2 None 23.8 23.9 None 26.9 27.1 None PIPE12093 A3 ZPIP11868 7 10 1 RECT_CLOSED 0.005 RCP 483.9 210.8 None 0.23 820.6 336.1 Both Upstream and Downstream 1267.3 527.4 Both Upstream and Downstream 1393.3 547.1 Both Upstream and Downstream PIPE12098 A3 ZPIP17586 7 10 1 RECT_CLOSED 0.005 RCP 441.8 228.2 Downstream 0.25 789.2 366.1 Both Upstream and Downstream 1271.0 530.8 Both Upstream and Downstream 1410.6 553.8 Both Upstream and Downstream PIPE12253 A3 ZPIP11134 1.5 0 1 CIRCULAR 0.009 RCP 2.2 2.3 Both Upstream and Downstream 0.23 3.8 3.4 Both Upstream and Downstream 5.9 5.3 Both Upstream and Downstream 6.5 6.1 Both Upstream and Downstream PIPE12255 A3 ZPIP14860 2 0 1 CIRCULAR 0.007 PVC 4.2 4.2 None 0.22 6.8 6.8 None 10.1 10.1 None 11.4 11.5 None PIPE11555 A3 ZPIP16733 4 0 1 CIRCULAR 0.075 RCP 94.3 92.0 None 0.23 156.9 149.5 None 233.1 208.1 None 265.1 231.6 None PIPE11665 A3 ZPIP10364 1.5 0 1 CIRCULAR 0.021 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.3 None 0.0 8.9 None PIPE11704 A3 ZPIP13079 1.5 0 1 CIRCULAR 0.085 RCP 5.9 5.9 None 0.19 10.4 10.4 None 15.7 15.7 None 17.9 17.9 None PIPE11958 A3 ZPIP17375 7 10 1 RECT_CLOSED 0.006 RCP 447.8 172.9 None 0.18 761.7 282.0 None 1615.7 529.7 None 1314.4 573.4 None PIPE12277 A3 ZPIP14964 2 0 1 CIRCULAR 0.013 RCP 5.6 5.6 None 0.21 9.1 9.1 None 13.6 13.8 None 15.7 15.6 None PIPE11510 A3 ZPIP12693 3 0 1 CIRCULAR 0.020 RCP 15.6 15.6 None 0.17 30.5 30.5 None 47.2 47.2 None 54.2 54.2 None PIPE11516 A3 ZPIP12697 5 0 1 CIRCULAR 0.057 CIPCP 106.7 107.1 None 0.2 184.0 184.5 None 270.2 271.5 None 300.8 312.2 None PIPE11557 A3 ZPIP10223 4 0 1 CIRCULAR 0.075 RCP 92.7 90.4 None 0.23 154.4 147.1 None 229.4 204.5 None 260.9 227.6 None PIPE11680 A3 ZPIP13025 3 0 1 CIRCULAR 0.009 RCP 10.2 10.2 None 0.16 17.2 18.2 None 25.6 32.8 None 29.0 37.1 None PIPE11866 A3 ZPIP11047 1.5 0 1 CIRCULAR 0.032 RCP 0.0 0.0 None 0 0.0 0.0 None 1.0 10.9 None 2.3 10.9 None PIPE11983 A3 ZPIP11549 3 0 1 CIRCULAR 0.014 RCP 15.6 15.6 None 0.19 27.5 27.5 None 41.6 40.7 None 47.6 46.4 None PIPE12055 A3 ZPIP11688 2.25 0 1 CIRCULAR 0.015 RCP 4.9 4.9 None 0.13 7.9 7.9 None 11.8 12.1 None 13.4 21.8 None PIPE12137 A3 ZCUL16847 6 0 1 CIRCULAR 0.030 RCP 162.1 172.5 Downstream 0.24 271.2 287.9 Both Upstream and Downstream 406.4 394.7 Both Upstream and Downstream 464.6 425.8 Both Upstream and Downstream PIPE12171 A3 PIP19084 3 0 2 CIRCULAR 0.007 RCP 36.2 32.0 None 0.28 59.0 48.8 None 85.8 62.6 None 98.0 65.9 None PIPE12223 A3 ZPIP14862 5.5 0 2 CIRCULAR 0.004 CIPCP 148.7 113.9 None 0.3 181.5 151.9 None 301.4 196.8 None 291.9 217.3 None CHAN10283 A3 CH050A 0 0 1 IRREGULAR 0.014 Concrete 100.6 118.1 None 0.31 157.0 176.3 None 217.9 210.1 None 244.1 222.4 None PIPE11606 A3 ZPIP16756 3 0 1 CIRCULAR 0.084 RCP 40.6 40.6 None 0.21 66.1 66.1 None 96.9 96.9 None 110.9 110.9 None PIPE11723 A3 ZPIP16887 1.5 0 1 CIRCULAR 0.009 RCP 0.0 0.0 None 0 0.0 0.1 None 0.0 6.1 None 0.0 5.6 None PIPE11903 A3 ZPIP14622 3 0 2 CIRCULAR 0.006 RCP 31.8 27.6 None 0.27 51.8 41.8 None 75.1 53.3 None 85.8 58.5 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 35 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE11960 A3 ZPIP17377 7 10 1 RECT_CLOSED 0.006 RCP 493.0 207.4 None 0.21 832.2 333.5 None 1264.3 536.2 None 1391.8 559.0 None CULV10172 A3 ZCUL064B 6 14 1 RECT_CLOSED 0.004 RCP 446.1 173.3 None 0.18 755.6 282.1 None 1574.9 537.2 None 1605.6 563.4 None PIPE11533 A3 ZPIP10216 4 0 1 CIRCULAR 0.095 RCP 85.9 85.8 None 0.19 145.3 145.5 None 215.7 217.2 None 245.8 248.6 None PIPE11809 A3 ZPIP17062 3 0 1 CIRCULAR 0.058 RCP 29.0 29.0 None 0.18 51.7 51.7 None 78.3 78.4 None 89.5 89.6 None PIPE11894 A3 ZPIP14612 7 10 1 RECT_CLOSED 0.006 RCP 449.9 175.4 None 0.18 762.4 284.2 None 1335.3 530.6 None 1291.2 549.9 None PIPE11899 A3 ZPIP14616 3 0 2 CIRCULAR 0.007 RCP 36.1 32.0 None 0.28 59.1 48.9 None 85.6 66.1 Downstream 91.5 63.9 Downstream PIPE11900 A3 ZPIP14617 3 0 2 CIRCULAR 0.007 RCP 36.0 32.0 None 0.28 57.4 47.8 Downstream 76.1 66.2 Both Upstream and Downstream 82.2 63.9 Both Upstream and Downstream PIPE11959 A3 ZPIP17376 7 10 1 RECT_CLOSED 0.006 RCP 491.9 204.9 None 0.21 830.7 329.5 None 1263.4 534.9 None 1389.4 557.2 None PIPE11965 A3 ZPIP11521 7 10 1 RECT_CLOSED 0.006 RCP 491.8 204.7 None 0.21 830.6 329.1 None 1264.7 535.1 None 1389.4 557.2 None PIPE11966 A3 ZPIP11522 7 10 1 RECT_CLOSED 0.006 RCP 451.3 176.5 None 0.18 764.1 285.1 None 1297.1 532.1 None 1293.8 548.0 None PIPE11967 A3 ZPIP15192 7 10 1 RECT_CLOSED 0.006 RCP 450.6 175.8 None 0.18 763.2 284.5 None 1292.5 529.6 None 1293.0 549.5 None PIPE11539 A3 ZPIP12714 3 0 1 CIRCULAR 0.090 RCP 40.1 40.1 None 0.2 65.5 65.5 None 96.1 96.1 None 110.0 110.0 None PIPE11591 A3 ZPIP16744 2 0 1 CIRCULAR 0.028 RCP 7.9 8.0 None 0.21 12.6 12.6 None 18.3 18.4 None 20.7 20.7 None PIPE11679 A3 ZPIP13024 3 0 1 CIRCULAR 0.010 RCP 10.1 10.2 None 0.15 17.1 17.3 None 25.7 30.1 None 29.3 36.4 None PIPE11732 A3 ZPIP13169 1.5 0 1 CIRCULAR 0.057 RCP 5.1 5.2 None 0.2 8.2 8.3 None 12.2 12.3 None 13.8 13.9 None PIPE11935 A3 ZPIP14878 2.5 0 1 CIRCULAR 0.069 RCP 27.3 24.8 None 0.23 48.6 39.5 None 74.3 57.6 None 83.0 59.0 None PIPE12108 A3 ZPIP15876 3 0 1 CIRCULAR 0.005 HDPE 14.6 9.4 None 0.21 14.4 15.0 None 25.0 22.2 None 27.7 25.1 None PIPE12240 A3 ZPIP11525 5.5 0 2 CIRCULAR 0.005 RCP 122.4 118.5 None 0.26 191.8 164.4 None 285.4 225.1 None 320.9 250.7 None PIPE12242 A3 ZPIP10225 4 0 1 CIRCULAR 0.075 RCP 88.5 86.2 None 0.22 147.7 140.5 None 219.7 195.0 None 249.9 216.8 None CHAN10224 A3 CH10142D 0 0 1 IRREGULAR 0.014 Earthen 197.4 225.0 Downstream 0.33 278.6 355.6 Downstream 248.2 410.2 Downstream 259.1 380.7 Downstream PIPE11615 A3 ZPIP12798 3.5 0 1 CIRCULAR 0.050 CIPCP 31.6 31.7 None 0.16 49.6 49.7 None 72.3 104.2 None 81.4 104.8 Both Upstream and Downstream PIPE11659 A3 ZPIP12990 1.5 0 1 CIRCULAR 0.042 RCP 4.5 4.5 None 0.21 7.1 7.1 None 10.4 10.4 None 11.7 11.7 None PIPE12006 A3 ZPIP15332 2 0 1 CIRCULAR 0.034 RCP 8.0 8.2 None 0.19 13.4 13.4 None 19.9 19.8 None 22.6 22.8 None PIPE12119 A3 ZPIP11880 1.75 0 1 CIRCULAR 0.010 RCP 3.1 3.2 None 0.2 5.1 5.1 None 7.5 7.6 None 8.6 8.6 None PIPE12291 A3 ZPIP15298 2.417 3.75 2 HORIZ_ELLIPSE 0.004 RCP 43.1 35.7 None 0.42 74.3 47.9 Both Upstream and Downstream 144.0 45.5 Both Upstream and Downstream 132.7 45.6 Both Upstream and Downstream PIPE11545 A3 ZPIP12717 5.5 0 1 CIRCULAR 0.019 RCP 98.5 97.5 None 0.21 163.7 156.4 None 243.1 217.9 None 271.0 242.8 None PIPE11921 A3 ZPIP14857 1.5 0 1 CIRCULAR 0.007 RCP 1.8 1.8 None 0.2 2.9 2.9 None 4.2 4.2 None 4.7 4.7 None PIPE11922 A3 ZPIP14858 1.5 0 1 CIRCULAR 0.007 RCP 1.8 1.8 None 0.2 2.9 2.9 None 4.2 4.2 None 4.8 4.8 None CHAN10310 A3 CH062A 6 25 1 TRAPEZOIDAL 0.008 Earthen 0.0 88.4 None 0.07 0.0 351.4 None 0.0 573.6 None 0.0 630.3 None PIPE11589 A3 ZPIP12752 2 0 1 CIRCULAR 0.050 RCP 11.1 11.1 None 0.22 17.7 17.9 None 25.9 25.4 Downstream 29.3 26.4 Downstream PIPE12170 A3 PIP19083 3 0 2 CIRCULAR 0.007 RCP 33.0 28.8 None 0.25 53.7 43.7 None 78.3 55.7 None 89.5 59.9 None PIPE11946 A3 ZPIP14887 3 0 1 CIRCULAR 0.010 RCP 11.7 12.0 None 0.18 19.5 19.6 None 29.3 29.0 None 33.4 33.5 None PIPE12087 A3 ZPIP11865 2.5 0 1 CIRCULAR 0.004 HDPE 5.2 5.2 None 0.19 15.3 8.1 None 15.8 11.9 None 33.6 13.4 None PIPE12107 A3 ZPIP15875 3 0 1 CIRCULAR 0.005 HDPE 16.0 9.4 None 0.19 16.7 15.1 None 25.0 22.3 None 27.8 25.0 None PIPE12149 A3 ZPIP16522 3.5 0 1 CIRCULAR 0.015 HDPE 22.9 22.5 None 0.18 39.2 38.2 None 57.7 59.2 None 67.4 64.0 None PIPE12262 A3 ZPIP14002 3 0 1 CIRCULAR 0.016 RCP 15.7 15.7 None 0.18 25.7 25.7 None 38.4 38.2 None 43.2 43.3 None PIPE11572 A3 ZPIP10229 3.5 0 1 CIRCULAR 0.049 RCP 36.8 36.9 None 0.17 64.9 65.0 None 98.5 98.1 None 112.7 111.5 None PIPE11663 A3 ZPIP12994 1.5 0 1 CIRCULAR 0.050 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 11.3 Both Upstream and Downstream 0.0 11.8 Both Upstream and Downstream PIPE11863 A3 ZPIP14305 1.5 0 1 CIRCULAR 0.010 RCP 4.6 1.9 None 0.18 3.7 3.1 None 3.5 4.6 None 3.8 5.2 None PIPE11901 A3 ZPIP11211 3 0 2 CIRCULAR 0.008 RCP 33.0 28.8 None 0.24 53.7 43.7 None 78.2 55.6 None 89.4 60.9 None PIPE11961 A3 ZPIP11517 7 10 1 RECT_CLOSED 0.007 RCP 504.6 209.0 None 0.19 820.3 336.1 None 1266.1 534.1 Downstream 1392.7 555.4 Both Upstream and Downstream PIPE12286 A3 ZPIP15294 1.5 0 1 CIRCULAR 0.010 RCP 0.0 0.0 None 0 1.0 4.5 Both Upstream and Downstream 5.4 4.5 Both Upstream and Downstream 1.7 5.1 Both Upstream and Downstream PIPE12121 A3 ZPIP11885 1.75 0 1 CIRCULAR 0.168 RCP 7.3 7.3 None 0.11 16.6 16.6 None 27.1 27.1 None 31.5 31.5 Downstream PIPE12174 A3 ZPIP13075 3 0 1 CIRCULAR 0.073 RCP 29.6 29.8 None 0.17 50.5 50.3 None 76.3 75.5 None 87.4 87.4 None PIPE12252 A3 ZPIP14483 1.5 0 1 CIRCULAR 0.008 RCP 1.9 1.9 Both Upstream and Downstream 0.2 3.0 2.6 Both Upstream and Downstream 4.5 4.0 Both Upstream and Downstream 5.0 4.6 Both Upstream and Downstream CHAN10222 A3 CH10142C 0 0 1 IRREGULAR 0.032 Earthen 198.7 225.5 None 0.29 303.6 360.4 Downstream 307.5 415.6 Downstream 265.6 386.1 Downstream CHAN10278 A3 0 0 1 IRREGULAR 0.012 Concrete 5.6 5.3 None 0.21 7.3 8.7 None 8.7 11.9 None 9.1 12.4 None PIPE11523 A3 ZPIP10212 1.5 0 1 CIRCULAR 0.032 RCP 3.5 3.5 None 0.19 5.4 5.5 None 7.9 7.9 None 8.9 8.9 None PIPE11583 A3 ZPIP16740 1.5 0 1 CIRCULAR 0.019 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 6.8 None 0.0 6.9 Downstream PIPE11660 A3 ZPIP12991 1.5 0 1 CIRCULAR 0.017 RCP 2.3 2.4 None 0.17 3.9 3.9 None 5.8 5.8 None 6.6 6.6 None PIPE11823 A3 ZPIP13909 3 0 1 CIRCULAR 0.101 RCP 33.3 33.3 None 0.16 58.9 58.9 None 88.9 89.2 None 101.6 102.0 None PIPE11824 A3 ZPIP13925 4 0 1 CIRCULAR 0.040 RCP 42.3 42.3 None 0.15 84.9 84.9 None 132.1 125.2 None 152.8 136.3 None CULV10142 A3 ZCUL067B 4 6 3 RECT_CLOSED 0.021 RCP 9.7 45.7 None 0.03 27.7 260.1 None 54.1 562.5 None 128.7 634.5 None PIPE11896 A3 ZPIP14615 4 0 1 CIRCULAR 0.009 RCP 20.9 20.8 None 0.16 36.8 36.7 None 56.2 56.1 None 64.4 64.4 None PIPE12008 A3 ZPIP11622 1.5 0 1 CIRCULAR 0.008 RCP 0.6 2.1 None 0.22 0.9 2.9 Downstream 1.3 4.0 Both Upstream and Downstream 1.5 4.4 Both Upstream and Downstream PIPE11702 A3 ZPIP16860 3 0 1 CIRCULAR 0.078 RCP 29.5 29.8 None 0.16 50.3 50.2 None 76.0 75.4 None 87.1 87.1 None PIPE11821 A3 ZPIP10845 2.5 0 1 CIRCULAR 0.056 RCP 13.5 13.5 None 0.14 25.7 25.7 None 39.8 39.8 None 45.8 45.7 None PIPE11822 A3 ZPIP10846 3 0 1 CIRCULAR 0.106 RCP 33.3 33.3 None 0.15 59.2 58.7 None 89.0 89.5 Downstream 101.7 102.0 Downstream PIPE12089 A3 ZPIP15859 2.5 0 1 CIRCULAR 0.005 HDPE 5.1 5.1 None 0.18 15.0 8.0 None 19.3 11.9 None 38.4 13.5 None PIPE12234 A3 ZPIP15991 2 0 1 CIRCULAR 0.005 RCP 0.0 2.1 None 0.13 0.0 10.5 Downstream 0.4 11.2 Both Upstream and Downstream 1.0 7.3 Both Upstream and Downstream CHAN10286 A3 CH050A 0 0 1 IRREGULAR 0.014 Concrete 89.8 110.3 None 0.21 143.7 170.3 None 201.4 204.7 None 225.6 241.8 None PIPE12310 A3 ZPIP17213 1.5 0 1 CIRCULAR -0.010 RCP 0.0 0.0 None 0 0.1 0.0 None 9.7 0.1 None 147.3 4.9 None PIPE11569 A3 ZPIP12735 2 0 1 CIRCULAR 0.081 RCP 8.2 8.2 None 0.13 16.5 16.5 None 25.9 25.9 None 29.9 29.9 None PIPE11573 A3 ZPIP12739 3 0 1 CIRCULAR 0.080 RCP 27.3 27.4 None 0.14 49.8 49.8 None 76.2 76.2 None 87.3 87.3 None PIPE11574 A3 ZPIP12740 2.5 0 1 CIRCULAR 0.050 RCP 13.4 13.5 None 0.15 24.3 24.3 None 37.1 37.1 None 42.5 42.4 None PIPE11576 A3 ZPIP16738 2 0 1 CIRCULAR 0.064 RCP 7.3 7.3 None 0.13 14.4 14.4 None 22.6 22.6 None 26.1 26.1 None PIPE11706 A3 ZPIP16861 4 0 1 CIRCULAR 0.015 CIPCP 23.9 21.2 Downstream 0.14 36.6 36.4 Downstream 59.6 64.3 Downstream 72.2 70.6 Downstream PIPE11858 A3 ZPIP11042 1.5 0 1 CIRCULAR 0.010 RCP 1.9 1.9 None 0.17 3.0 3.0 None 4.4 4.4 None 4.9 4.9 None PIPE11930 A3 ZPIP17268 1.5 0 1 CIRCULAR 0.010 RCP 0.3 2.5 Both Upstream and Downstream 0.24 0.5 2.5 Both Upstream and Downstream 0.7 4.1 Both Upstream and Downstream 0.8 4.7 Both Upstream and Downstream PIPE12060 A3 ZPIP15543 3 0 1 CIRCULAR 0.005 RCP 6.7 6.7 None 0.14 12.0 12.0 None 18.0 17.9 None 20.5 21.6 None PIPE12097 A3 ZPIP17585 4 0 1 CIRCULAR 0.004 RCP 32.1 15.0 Downstream 0.17 30.0 25.9 Both Upstream and Downstream 52.9 37.6 Both Upstream and Downstream 51.0 42.0 Both Upstream and Downstream PIPE12111 A3 ZPIP11874 1.5 0 1 CIRCULAR 0.005 HDPE 2.6 1.3 None 0.18 2.0 2.1 None 3.2 3.1 None 3.6 3.5 None PIPE12187 A3 PIP10622 3.5 0 1 CIRCULAR 0.030 RCP 38.7 33.2 None 0.19 81.6 60.5 None 118.5 78.4 None 135.4 80.0 None PIPE12235 A3 ZPIP17446 2.5 0 1 CIRCULAR 0.005 RCP 5.8 8.4 None 0.29 9.3 14.2 Both Upstream and Downstream 14.4 13.8 Both Upstream and Downstream 16.6 13.3 Both Upstream and Downstream PIPE11568 A3 ZPIP12733 2.5 0 1 CIRCULAR 0.043 RCP 12.0 12.0 None 0.14 22.0 22.0 None 33.7 33.7 None 38.6 38.5 None PIPE11623 A3 ZPIP12806 3 0 1 CIRCULAR 0.089 RCP 28.4 28.5 None 0.14 51.5 51.6 None 78.8 78.7 None 90.2 90.2 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 36 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE11818 A3 ZPIP13908 3 0 1 CIRCULAR 0.028 RCP 15.1 15.1 None 0.14 28.1 28.1 None 43.3 43.2 None 49.7 49.6 None PIPE12068 A3 ZPIP17578 3.5 0 1 CIRCULAR 0.006 HDPE 12.6 12.6 None 0.16 18.6 20.7 None 19.1 30.4 None 36.6 34.6 None CULV10157 A3 ZCUL11918E 3 5 3 RECT_CLOSED 0.009 RCP 82.6 92.9 None 0.2 129.4 144.3 None 172.7 183.6 None 191.5 211.2 None CHAN10290 A3 ZCH10206 0 0 1 IRREGULAR 0.031 Concrete 98.7 126.8 None 0.1 164.3 193.3 None 232.4 233.8 Downstream 261.9 556.3 Downstream PIPE12313 A3 ZPIP15195 2 8 1 RECT_CLOSED 0.013 RCP 24.2 27.9 None 0.15 46.9 47.3 None 164.5 71.8 None 317.3 81.4 None PIPE11522 A3 ZPIP10211 1.5 0 1 CIRCULAR 0.067 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 12.1 None PIPE11743 A3 ZPIP13178 1.5 0 1 CIRCULAR 0.081 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 10.2 None 0.0 13.1 None PIPE11772 A3 ZPIP10473 1.5 0 1 CIRCULAR 0.029 RCP 0.5 0.9 None 0.05 1.5 5.6 None 1.3 4.9 None 1.6 7.9 None PIPE11847 A3 ZPIP14230 1.5 0 1 CIRCULAR 0.055 RCP 4.0 4.0 None 0.16 6.5 6.5 None 9.6 9.6 None 11.1 10.9 None PIPE11865 A3 ZPIP14307 1.5 0 1 CIRCULAR 0.008 RCP 0.9 1.4 None 0.15 2.1 2.4 None 3.5 3.7 None 4.0 4.2 None CULV10145 A3 ZCUL11918C 3 5 3 RECT_CLOSED 0.009 RCP 82.6 92.9 None 0.2 129.4 144.3 None 172.7 183.6 None 191.5 211.0 None PIPE12169 A3 PIP19076 3 0 1 CIRCULAR 0.105 RCP 31.8 31.9 None 0.15 53.1 53.0 None 81.5 81.2 None 93.0 95.2 None PIPE12276 A3 ZPIP14825 1.5 0 1 CIRCULAR 0.007 RCP 9.9 4.0 Both Upstream and Downstream 0.46 2.8 1.9 Both Upstream and Downstream 4.4 3.0 Both Upstream and Downstream 4.7 3.8 Both Upstream and Downstream PIPE11567 A3 ZPIP12732 1.5 0 1 CIRCULAR 0.037 RCP 3.4 3.4 None 0.17 5.3 5.3 None 7.8 7.8 None 8.7 8.7 None PIPE11596 A3 ZPIP12783 3.5 0 1 CIRCULAR 0.053 RCP 31.5 31.3 None 0.14 57.5 57.2 None 87.8 87.4 None 100.6 100.0 None PIPE11657 A3 ZPIP10282 1.5 0 1 CIRCULAR 0.015 ACP 0.0 0.0 None 0 0.1 0.1 None 0.1 3.6 Downstream 0.1 5.5 Both Upstream and Downstream PIPE11745 A3 ZPIP13180 2 0 1 CIRCULAR 0.034 RCP 7.0 7.0 None 0.17 11.0 11.0 None 16.0 15.7 None 18.1 18.1 None PIPE11838 A3 ZPIP13974 1.5 0 1 CIRCULAR 0.027 RCP 2.9 2.9 None 0.17 4.5 4.5 None 6.5 6.5 None 7.4 7.4 None PIPE11998 A3 ZPIP11592 2.5 0 1 CIRCULAR 0.025 RCP 9.8 10.0 None 0.16 16.4 16.5 None 24.4 24.3 None 27.8 27.9 None PIPE12028 A3 ZPIP11648 3 0 1 CIRCULAR 0.005 RCP 6.7 6.6 None 0.14 12.0 11.9 None 17.8 17.5 None 20.4 20.3 None PIPE12209 A3 ZPIP14614 4 0 1 CIRCULAR 0.011 RCP 21.0 21.1 None 0.14 36.8 37.0 None 56.2 56.6 None 64.4 64.8 None PIPE11505 A3 ZPIP12684 1.5 0 1 CIRCULAR 0.084 RCP 4.4 4.4 None 0.14 7.4 7.4 None 11.2 11.2 None 12.8 12.8 None PIPE11508 A3 ZPIP12691 1.5 0 1 CIRCULAR 0.082 RCP 4.4 4.4 None 0.15 7.4 7.4 None 11.2 11.2 None 12.8 12.8 None PIPE11697 A3 ZPIP10403 3.5 0 1 CIRCULAR 0.033 RCP 26.1 26.0 None 0.14 43.8 43.9 None 64.1 66.8 None 72.9 76.5 None PIPE11719 A3 ZPIP10445 1.5 0 1 CIRCULAR 0.019 RCP 0.0 0.0 None 0 0.0 0.9 None 0.0 6.1 None 0.0 6.0 None PIPE12075 A3 ZPIP15839 2.5 0 1 CIRCULAR 0.005 HDPE 4.6 4.6 None 0.16 7.3 7.3 None 11.5 10.7 None 16.7 12.0 None PIPE12090 A3 ZPIP15860 2.5 0 1 CIRCULAR 0.006 HDPE 5.2 5.2 None 0.16 15.2 8.1 None 17.0 11.9 None 36.4 13.4 None CULV10156 A3 ZCUL11918D 3 5 3 RECT_CLOSED 0.009 RCP 81.3 91.1 None 0.19 127.1 141.6 None 169.4 176.2 None 187.6 199.9 None PIPE12295 A3 ZPIP15928 5.5 12 3 RECT_CLOSED 0.005 RCP 300.1 283.7 None 0.12 821.3 725.2 None 1039.6 896.1 None 1105.3 975.3 None PIPE12306 A3 PIP19074 5.5 12 3 RECT_CLOSED 0.005 RCP 299.3 285.6 None 0.12 822.2 725.1 None 1041.2 896.1 None 1106.8 975.4 None PIPE11674 A3 ZPIP10367 1.5 0 1 CIRCULAR 0.009 RCP 1.6 1.6 None 0.16 2.5 2.5 None 3.6 3.6 None 4.1 4.1 None PIPE11970 A3 ZPIP15198 6 0 2 CIRCULAR 0.022 RCP 186.2 228.5 None 0.18 316.7 354.4 None 459.9 450.0 None 523.1 513.4 None PIPE12010 A3 ZPIP11631 1.5 0 1 CIRCULAR 0.028 RCP 0.0 0.0 None 0 0.0 5.3 None 0.0 7.4 None 0.0 7.2 None PIPE12172 A3 PIP19091 3.5 0 1 CIRCULAR 0.036 CIPCP 19.8 19.8 None 0.12 38.2 38.1 None 58.9 58.9 None 67.7 67.7 None PIPE12173 A3 PIP19092 3.5 0 1 CIRCULAR 0.036 CIPCP 19.8 19.8 None 0.12 38.2 38.2 None 59.0 59.0 None 67.8 67.8 None PIPE11562 A3 ZPIP16735 3.5 0 1 CIRCULAR 0.006 RCP 11.4 11.5 None 0.15 18.2 18.3 None 26.6 26.8 None 30.3 30.2 None PIPE11593 A3 ZPIP10250 5.5 0 1 CIRCULAR 0.042 RCP 109.6 107.9 None 0.16 181.3 174.6 None 268.1 252.6 None 300.0 271.3 Downstream PIPE11864 A3 ZPIP14306 1.5 0 1 CIRCULAR 0.010 RCP 1.2 1.4 None 0.14 2.3 2.4 None 3.7 3.7 None 4.2 4.2 None PIPE12043 A3 ZPIP11654 2.5 0 1 CIRCULAR 0.038 RCP 11.7 11.8 None 0.15 19.4 19.5 None 28.8 29.4 None 32.6 31.8 None PIPE12150 A3 ZPIP16523 1.5 0 1 CIRCULAR 0.012 HDPE 0.0 0.0 None 0 0.0 0.0 None 0.0 0.9 None 0.0 4.7 None PIPE12167 A3 PIP19072 3 0 1 CIRCULAR 0.105 RCP 29.0 29.2 None 0.14 48.8 48.8 None 75.2 75.1 None 85.9 85.8 None PIPE12168 A3 PIP19075 3 0 1 CIRCULAR 0.105 RCP 29.0 29.1 None 0.13 48.8 48.7 None 75.3 75.0 None 86.0 85.7 None PIPE12185 A3 PIP10606 3.5 0 1 CIRCULAR 0.051 RCP 41.3 35.9 None 0.16 87.2 66.2 None 129.2 87.3 None 156.8 90.5 None DTCH10275 A3 DD055A 0 0 1 IRREGULAR 0.001 CONCRETE 471.2 157.6 None 0.12 745.5 270.2 None 1173.0 500.4 Upstream 1352.8 517.6 Upstream PIPE11600 A3 ZPIP16639 4.5 0 1 CIRCULAR 0.149 RCP 102.2 102.7 None 0.14 176.8 177.1 None 260.0 261.1 None 287.5 297.6 None PIPE11808 A3 ZPIP17061 1.5 0 1 CIRCULAR 0.041 RCP 2.9 2.9 None 0.14 4.8 4.8 None 7.2 7.2 None 8.2 8.2 None PIPE12189 A3 PIP10624 4 0 1 CIRCULAR 0.035 RCP 25.1 22.8 None 0.09 57.2 50.0 None 87.4 89.8 None 100.3 104.5 None PIPE12190 A3 PIP10681 4 0 1 CIRCULAR 0.035 RCP 25.1 22.8 None 0.09 57.4 50.1 None 87.9 90.2 None 100.8 104.2 None CULV10168 A3 CUL033A 4 6 1 RECT_CLOSED 0.019 RCP 80.2 57.6 Both Upstream and Downstream 0.13 131.8 69.1 Both Upstream and Downstream 396.6 145.9 Both Upstream and Downstream 383.3 168.6 Both Upstream and Downstream CHAN10315 A3 CH062B 6 25 1 TRAPEZOIDAL 0.015 Earthen 0.5 72.5 None 0.04 1.5 310.0 None 2.5 565.3 None 3.0 630.8 None PIPE11513 A3 ZPIP10208 3.5 0 1 CIRCULAR 0.079 CIPCP 28.9 28.8 None 0.12 53.4 53.2 None 81.7 81.4 None 93.6 93.3 None PIPE11673 A3 ZPIP16815 1.5 0 1 CIRCULAR 0.010 RCP 1.5 1.5 None 0.15 2.4 2.5 None 3.5 3.6 None 3.9 4.0 None PIPE11741 A3 ZPIP13175 3 0 1 CIRCULAR 0.062 RCP 19.9 20.0 None 0.12 34.3 34.4 None 54.1 53.4 None 61.4 62.5 None PIPE11891 A3 ZPIP11204 2 0 1 CIRCULAR 0.014 RCP 4.0 4.0 None 0.15 6.3 6.3 None 9.2 9.1 None 10.4 10.2 None PIPE11969 A3 ZPIP15196 2 0 1 CIRCULAR 0.037 RCP 6.1 6.1 None 0.14 9.9 9.9 None 14.6 14.7 None 16.6 16.6 None PIPE12074 A3 ZPIP15838 2.5 0 1 CIRCULAR 0.006 HDPE 4.6 4.7 None 0.15 7.3 7.3 None 11.5 10.7 None 16.7 12.1 None PIPE12257 A3 ZPIP11618 1.5 4 1 RECT_CLOSED 0.011 RCP 6.4 6.4 None 0.13 10.4 10.5 None 15.8 15.8 None 17.9 17.9 None CHAN10289 A3 ZCH10206 0 0 1 IRREGULAR 0.031 Concrete 98.7 126.9 None 0.1 164.3 193.7 None 232.4 234.3 None 262.0 474.5 None PIPE11528 A3 ZPIP12706 1.5 0 1 CIRCULAR 0.009 RCP 1.4 1.4 None 0.14 2.2 2.2 None 3.2 3.2 None 3.6 3.6 None PIPE11541 A3 ZPIP10218 3 0 1 CIRCULAR 0.065 RCP 20.8 20.8 None 0.12 36.7 36.7 None 55.5 55.5 None 63.3 63.3 None PIPE11658 A3 ZPIP12989 1.5 0 1 CIRCULAR 0.038 RCP 2.9 2.9 None 0.14 4.6 4.6 None 6.7 6.8 None 7.6 7.6 None PIPE11664 A3 ZPIP10363 1.5 0 1 CIRCULAR 0.040 RCP 3.0 3.0 None 0.14 4.7 4.7 None 6.9 6.9 None 7.7 7.8 None PIPE11996 A3 ZPIP17425 3 0 1 CIRCULAR 0.018 RCP 11.7 11.9 None 0.13 19.3 19.5 None 28.8 28.7 None 32.9 33.2 None PIPE12013 A3 ZPIP15399 1.5 0 1 CIRCULAR 0.022 RCP 0.0 0.0 None 0 0.0 2.6 None 0.0 6.5 None 0.0 5.8 None PIPE12056 A3 ZPIP11689 2.25 0 1 CIRCULAR 0.014 RCP 4.9 4.9 None 0.13 7.9 7.9 None 11.8 11.8 None 13.4 13.4 None PIPE12072 A3 ZPIP11855 4 0 1 CIRCULAR 0.005 HDPE 12.4 13.3 None 0.13 17.2 22.5 None 26.0 34.0 None 43.4 37.0 None PIPE11815 A3 ZPIP13905 2 0 1 CIRCULAR 0.093 RCP 6.6 6.6 None 0.1 13.4 13.4 None 21.1 21.1 None 24.4 24.5 None PIPE11964 A3 ZPIP15188 7 11 1 RECT_CLOSED 0.005 RCP 141.9 140.8 Both Upstream and Downstream 0.14 253.4 246.7 Both Upstream and Downstream 394.7 367.5 Both Upstream and Downstream 296.3 366.7 Both Upstream and Downstream PIPE12104 A3 ZPIP15872 2.5 0 1 CIRCULAR 0.005 HDPE 7.6 4.0 None 0.14 15.3 6.3 None 10.8 9.3 None 11.7 10.6 None PIPE12134 A3 ZPIP11972 5.5 0 1 CIRCULAR 0.017 RCP 64.8 65.1 None 0.15 107.4 178.2 None 598.7 168.7 Both Upstream and Downstream 623.0 158.3 Both Upstream and Downstream CULV10160 A3 ZCUL070D 2 6 3 RECT_CLOSED 0.004 RCP 54.2 26.5 None 0.12 91.1 44.6 None 133.6 66.2 None 146.3 75.5 None PIPE11502 A3 ZPIP16727 1.5 0 1 CIRCULAR 0.042 RCP 2.7 2.7 None 0.12 4.4 4.4 None 6.6 6.6 None 7.5 7.5 None PIPE11511 A3 ZPIP12694 3.5 0 1 CIRCULAR 0.055 RCP 24.7 24.7 None 0.1 46.4 46.4 None 71.3 71.3 None 81.8 81.8 None PIPE11549 A3 ZPIP10220 2 0 1 CIRCULAR 0.039 RCP 6.1 6.1 None 0.14 9.5 9.5 None 13.8 13.8 None 15.5 15.6 None PIPE11558 A3 ZPIP10224 1.5 0 1 CIRCULAR 0.120 RCP 4.9 4.9 None 0.13 7.7 7.7 None 11.3 11.3 None 12.7 12.7 None PIPE11579 A3 ZPIP10232 3.5 0 1 CIRCULAR 0.036 RCP 36.8 34.2 None 0.18 59.0 51.7 None 87.0 62.1 None 98.5 66.2 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 37 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE11778 A3 ZPIP10476 1.5 0 1 CIRCULAR 0.074 RCP 3.5 3.5 None 0.12 5.9 5.9 None 8.9 8.9 None 10.1 10.1 None PIPE11876 A3 ZPIP14493 1.5 0 1 CIRCULAR 0.017 RCP 0.4 0.1 None 0.01 1.2 18.6 Both Upstream and Downstream 10.0 9.3 Both Upstream and Downstream 18.8 4.7 Both Upstream and Downstream CULV10148 A3 ZCUL13955 7 11 1 RECT_CLOSED 0.005 RCP 133.7 138.2 Both Upstream and Downstream 0.13 261.9 226.6 Both Upstream and Downstream 399.2 370.0 Both Upstream and Downstream 300.2 369.8 Both Upstream and Downstream PIPE12042 A3 ZPIP15444 2.5 0 1 CIRCULAR 0.008 RCP 4.9 5.0 None 0.13 7.8 7.9 None 11.4 11.5 None 12.8 13.0 None PIPE12102 A3 ZPIP11872 2 0 1 CIRCULAR 0.005 HDPE 4.8 2.1 None 0.14 15.8 3.3 None 5.9 4.9 None 6.0 5.5 None PIPE12136 A3 ZPIP11974 5.5 0 1 CIRCULAR 0.013 RCP 58.4 58.4 None 0.15 94.4 195.8 None 664.9 150.4 Both Upstream and Downstream 631.8 134.4 Both Upstream and Downstream PIPE12177 A3 ZPIP20006 3.5 0 1 CIRCULAR 0.097 RCP 61.0 61.2 None 0.2 97.3 108.2 None 142.8 108.5 Both Upstream and Downstream 161.5 110.9 Both Upstream and Downstream CULV10162 A3 ZCUL13082 3 5 2 RECT_CLOSED 0.031 RCP 78.6 81.7 None 0.14 127.8 127.6 None 267.5 181.3 None 323.1 198.7 None PIPE11525 A3 ZPIP12703 2 0 1 CIRCULAR 0.035 RCP 5.6 5.6 None 0.13 8.8 8.8 None 12.8 12.8 None 14.4 14.5 None PIPE11556 A3 ZPIP16734 1.5 0 1 CIRCULAR 0.012 RCP 1.6 1.6 None 0.13 2.5 2.5 None 3.6 3.6 None 4.0 4.0 None PIPE11893 A3 ZPIP14610 2 8 1 RECT_CLOSED 0.017 RCP 22.8 23.0 None 0.11 39.8 40.0 None 60.8 60.9 None 69.6 69.8 None PIPE12084 A3 ZPIP15858 2 0 1 CIRCULAR 0.004 HDPE 1.9 1.8 None 0.13 10.8 2.9 None 17.9 4.3 None 26.2 4.8 None CULV10161 A3 ZCUL16808B 2 6 3 RECT_CLOSED 0.009 RCP 61.0 61.2 None 0.19 97.3 100.7 None 142.8 108.5 Both Upstream and Downstream 161.5 110.5 Both Upstream and Downstream PIPE11561 A3 ZPIP12728 2 0 1 CIRCULAR 0.035 RCP 5.4 5.5 None 0.13 8.6 8.6 None 12.5 12.5 None 14.1 14.2 None PIPE11754 A3 ZPIP10465 2.5 0 1 CIRCULAR 0.206 RCP 20.9 20.9 None 0.11 34.1 34.4 None 50.6 52.4 None 57.4 62.2 None PIPE11761 A3 ZPIP13193 1.75 0 1 CIRCULAR 0.023 RCP 2.2 2.2 None 0.09 4.4 4.4 None 6.9 6.9 None 7.9 7.9 None PIPE12023 A3 ZPIP17459 3 0 1 CIRCULAR 0.202 RCP 33.0 33.1 None 0.11 55.0 73.2 None 84.4 99.3 Both Upstream and Downstream 96.3 99.8 Both Upstream and Downstream PIPE12053 A3 ZPIP17484 2.25 0 1 CIRCULAR 0.017 RCP 4.9 4.9 None 0.12 8.0 8.0 None 11.8 11.8 None 13.4 13.4 None PIPE12233 A3 ZPIP16084 5.5 0 1 CIRCULAR 0.013 RCP 0.1 1.7 None 0 0.1 126.4 None 15.8 98.2 Both Upstream and Downstream 37.3 125.5 Both Upstream and Downstream CULV10165 A3 ZCUL16808A 2 6 3 RECT_CLOSED 0.010 RCP 61.6 60.8 None 0.18 96.8 99.5 None 142.2 110.5 Both Upstream and Downstream 160.8 111.0 Both Upstream and Downstream PIPE11766 A3 ZPIP13196 1.5 0 1 CIRCULAR 0.178 RCP 0.0 0.0 None 0 0.0 0.2 None 0.0 10.8 None 0.0 14.4 None PIPE11889 A3 ZPIP17212 2 0 1 CIRCULAR 0.037 RCP 5.0 5.0 None 0.12 8.1 8.1 None 12.1 12.1 None 13.7 13.7 None PIPE12092 A3 ZPIP17584 4 10 1 TRAPEZOIDAL 0.000 CMP 10.0 8.3 None 0.12 17.5 13.1 None 28.3 19.3 None 49.2 21.8 None CHAN10297 A3 CH043B 4 4 1 TRAPEZOIDAL 0.003 Concrete 77.2 60.2 Both Upstream and Downstream 0.12 122.5 76.3 Both Upstream and Downstream 373.3 138.7 Both Upstream and Downstream 360.0 159.2 Both Upstream and Downstream PIPE11616 A3 ZPIP12802 2.75 0 1 CIRCULAR 0.034 RCP 1.8 1.8 None 0.02 2.9 2.9 None 4.2 33.1 None 4.8 30.2 None PIPE11873 A3 ZPIP14489 1.5 0 1 CIRCULAR 0.058 RCP 2.9 2.9 Both Upstream and Downstream 0.11 4.7 4.7 Both Upstream and Downstream 7.1 6.9 Both Upstream and Downstream 8.1 7.9 Both Upstream and Downstream PIPE12132 A3 ZPIP16082 7 11 1 RECT_CLOSED 0.005 RCP 132.0 120.9 None 0.11 205.5 304.8 Downstream 327.8 294.8 Both Upstream and Downstream 395.8 329.2 Both Upstream and Downstream PIPE11739 A3 ZPIP10461 3 0 1 CIRCULAR 0.062 RCP 15.7 15.7 None 0.09 27.3 27.4 None 43.6 42.9 None 49.5 49.7 None PIPE11812 A3 ZPIP13902 1.5 0 1 CIRCULAR 0.010 RCP 1.2 1.2 None 0.11 1.9 1.9 None 2.7 2.7 None 3.1 3.1 None PIPE11820 A3 ZPIP10844 2.5 0 1 CIRCULAR 0.140 RCP 13.5 13.5 None 0.09 25.7 25.7 None 39.8 39.7 None 45.7 45.6 None PIPE11832 A3 ZPIP13930 2.5 0 1 CIRCULAR 0.085 RCP 11.1 11.1 None 0.09 20.5 20.5 None 31.4 31.4 None 36.0 36.0 None CHAN10296 A3 CH060C 0 0 1 IRREGULAR 0.001 Earthen 671.8 437.4 Both Upstream and Downstream 0.15 759.4 596.1 Both Upstream and Downstream 767.1 784.1 Both Upstream and Downstream 1070.9 857.4 Both Upstream and Downstream PIPE12304 A3 PIP19073 5.5 12 3 RECT_CLOSED 0.005 RCP 186.8 180.1 None 0.08 639.2 607.0 None 763.2 669.2 None 803.3 707.1 None PIPE12305 A3 PIP19074 5.5 12 3 RECT_CLOSED 0.005 RCP 188.3 181.2 None 0.08 641.3 609.5 None 769.3 673.1 None 812.2 711.6 None PIPE12085 A3 ZPIP11863 2 0 1 CIRCULAR 0.005 HDPE 1.8 1.8 None 0.11 15.0 2.9 None 17.5 4.2 None 26.0 4.8 None PIPE11501 A3 ZPIP10191 1.5 0 1 CIRCULAR 0.067 RCP 3.0 3.0 None 0.11 4.7 4.7 None 6.8 6.8 None 7.6 7.6 None PIPE11537 A3 ZPIP12712 1.5 0 1 CIRCULAR 0.030 RCP 2.0 2.0 None 0.11 3.1 3.1 None 4.5 4.6 None 5.1 5.2 None PIPE11605 A3 ZPIP16755 2 0 1 CIRCULAR 0.108 RCP 7.7 7.7 None 0.1 12.4 12.4 None 18.4 18.4 None 20.9 20.9 None PIPE11859 A3 ZPIP11043 1.5 0 1 CIRCULAR 0.029 RCP 1.9 1.9 None 0.11 3.0 3.0 None 4.4 4.4 None 5.0 5.0 None PIPE12069 A3 ZPIP17579 2.5 0 1 CIRCULAR 0.006 HDPE 3.4 3.4 None 0.11 5.3 5.3 None 10.9 7.7 None 14.1 8.7 None PIPE12076 A3 ZPIP15840 2.5 0 1 CIRCULAR 0.006 HDPE 3.4 3.4 None 0.11 5.3 5.3 None 10.9 7.8 None 14.1 8.7 None PIPE12086 A3 ZPIP11864 2 0 1 CIRCULAR 0.006 HDPE 1.8 1.8 None 0.11 13.2 2.8 None 17.6 4.2 None 26.2 4.7 None PIPE11509 A3 ZPIP12692 3.5 0 1 CIRCULAR 0.072 CIPCP 18.4 18.4 None 0.08 35.4 35.4 None 54.7 54.7 None 62.8 62.8 None PIPE11554 A3 ZPIP16732 2 0 1 CIRCULAR 0.132 RCP 8.7 8.7 None 0.11 13.6 13.6 None 19.8 19.8 None 22.2 22.3 None PIPE11769 A3 ZPIP13199 1.5 0 1 CIRCULAR 0.092 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 8.8 None 0.0 8.7 None PIPE11831 A3 ZPIP13929 1.5 0 1 CIRCULAR 0.162 RCP 0.0 0.0 None 0 0.0 7.5 None 0.0 8.7 Both Upstream and Downstream 0.0 11.6 Both Upstream and Downstream PIPE11837 A3 ZPIP13973 1.5 0 1 CIRCULAR 0.067 RCP 2.9 2.9 None 0.11 4.5 4.6 None 6.6 6.6 None 7.4 7.4 None PIPE12037 A3 ZPIP15437 1.5 0 1 CIRCULAR 0.020 RCP 1.2 1.2 None 0.08 2.2 2.2 None 3.5 3.6 None 4.0 4.0 None PIPE12122 A3 ZPIP17607 3 0 1 CIRCULAR 0.022 RCP 0.0 7.1 None 0.07 1.0 1.9 None 5.1 31.6 None 7.3 26.9 None PIPE12188 A3 PIP10623 4 0 1 CIRCULAR 0.071 RCP 25.2 22.9 None 0.06 58.1 50.5 None 87.8 91.3 None 100.6 104.3 None PIPE12218 A3 PIP10826 2 0 2 CIRCULAR 0.380 PVC 40.1 37.8 None 0.14 73.4 55.9 None 111.2 70.4 None 126.0 76.3 None CHAN10299 A3 CH043C 4 4 1 TRAPEZOIDAL 0.003 Concrete 83.9 62.6 Both Upstream and Downstream 0.12 107.9 81.7 Both Upstream and Downstream 338.2 124.8 Both Upstream and Downstream 321.9 139.1 Both Upstream and Downstream PIPE11535 A3 ZPIP12710 3 0 1 CIRCULAR 0.084 RCP 16.5 16.5 None 0.09 29.2 29.2 None 44.1 44.1 None 50.2 50.2 None PIPE11813 A3 ZPIP13903 1.5 0 1 CIRCULAR 0.009 RCP 1.0 1.0 None 0.1 1.6 1.6 None 2.3 2.3 None 2.6 2.6 None PIPE11868 A3 ZPIP14482 1.5 0 1 CIRCULAR 0.012 RCP 1.2 1.2 None 0.1 1.8 1.8 None 2.6 2.7 None 3.0 3.0 None PIPE11553 A3 ZPIP12722 1.5 0 1 CIRCULAR 0.086 RCP 2.9 2.9 None 0.1 4.6 4.6 None 6.7 6.7 None 7.6 7.6 None PIPE11564 A3 ZPIP16737 2.5 0 1 CIRCULAR 0.063 RCP 7.2 7.2 None 0.07 14.3 14.3 None 22.5 22.5 None 26.0 26.2 None PIPE12155 A3 ZPIP12231 1.5 0 1 CIRCULAR 0.079 RCP 2.8 2.8 None 0.1 4.4 4.4 None 6.5 6.5 None 7.3 7.3 None PIPE11577 A3 ZPIP16739 2 0 1 CIRCULAR 0.085 RCP 4.2 4.2 None 0.06 8.8 8.8 None 13.9 13.9 None 16.1 16.1 None PIPE11649 A3 ZPIP12831 5.5 0 1 CIRCULAR 0.008 RCP 25.6 29.5 Downstream 0.1 41.7 47.0 Downstream 63.8 86.8 Downstream 71.3 71.6 Downstream PIPE11877 A3 ZPIP14495 7 11 1 RECT_CLOSED 0.005 RCP 132.0 120.9 Downstream 0.11 186.8 219.4 Both Upstream and Downstream 328.2 295.3 Both Upstream and Downstream 250.8 262.7 Both Upstream and Downstream PIPE12038 A3 ZPIP11651 1.5 0 1 CIRCULAR 0.018 RCP 0.0 0.0 None 0 0.0 0.0 None 0.1 3.3 None 0.1 3.3 None PIPE12091 A3 ZPIP17581 4 10 1 TRAPEZOIDAL 0.000 CMP 13.1 14.8 None 0.09 35.5 24.0 None 43.2 36.2 None 55.6 40.5 None PIPE12311 A3 ZPIP17214 1.5 0 1 CIRCULAR 0.006 RCP 0.6 0.6 None 0.08 1.1 1.1 None 3.4 1.7 None 60.4 1.9 None PIPE12033 A3 ZPIP15433 1.5 0 1 CIRCULAR 0.101 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 8.5 None 0.0 7.7 None PIPE12070 A3 ZPIP17580 3 0 1 CIRCULAR 0.006 HDPE 4.6 4.6 None 0.09 8.8 7.3 None 11.9 10.6 None 16.7 12.0 None PIPE12082 A3 ZPIP15855 2.333 0 1 CIRCULAR 0.015 HDPE 3.6 3.6 None 0.09 5.7 5.7 None 8.3 8.3 None 9.4 9.4 None PIPE12265 A3 ZPIP10960 3 0 1 CIRCULAR 0.008 RCP 7.1 11.6 Both Upstream and Downstream 0.19 16.3 15.4 Both Upstream and Downstream 43.3 12.1 Both Upstream and Downstream 26.8 13.9 Both Upstream and Downstream PIPE11690 A3 ZPIP19000 1.5 0 1 CIRCULAR 0.048 RCP 0.0 1.3 None 0.06 1.5 1.4 None 1.5 4.5 None 1.6 5.0 None PIPE11851 A3 ZPIP17129 1.5 0 1 CIRCULAR 0.013 RCP 1.0 1.1 None 0.09 1.8 1.7 None 2.4 2.4 Both Upstream and Downstream 2.7 2.7 Both Upstream and Downstream PIPE12263 A3 ZPIP14003 4.5 0 1 CIRCULAR 0.003 RCP 8.0 8.0 None 0.08 12.7 12.9 None 16.1 19.2 None 17.4 23.2 None PIPE12281 A3 ZPIP17411 3.167 5 1 HORIZ_ELLIPSE 0.026 RCP 50.2 50.3 Downstream 0.22 86.7 57.9 Both Upstream and Downstream 166.2 49.0 Both Upstream and Downstream 157.5 50.2 Both Upstream and Downstream PIPE11904 A3 ZPIP14762 1.5 0 1 CIRCULAR 0.081 HDPE 1.3 1.3 None 0.04 3.2 3.2 None 5.3 5.3 None 6.2 6.2 None PIPE12112 A3 ZPIP11875 1.5 0 1 CIRCULAR 0.024 HDPE 6.4 1.3 None 0.08 5.4 2.1 None 3.4 3.1 None 3.8 3.5 None PIPE12212 A3 ZPIP14311 2.5 0 1 CIRCULAR 0.016 RCP 3.3 2.9 None 0.05 8.6 4.6 None 10.9 14.4 Downstream 13.1 10.9 Downstream CHAN10276 A3 0 0 1 IRREGULAR 0.012 Concrete 4.5 5.7 None 0.1 6.8 9.1 None 8.6 12.3 None 9.4 12.7 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 38 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE11629 A3 ZPIP10267 1.5 0 1 CIRCULAR 0.060 RCP 2.0 2.0 None 0.08 3.2 3.2 None 4.7 4.7 None 5.3 5.3 None CULV10143 A3 ZCUL13009 7 10 1 RECT_CLOSED 0.010 RCP 235.1 245.1 Both Upstream and Downstream 0.19 445.9 236.1 Both Upstream and Downstream 594.5 250.9 Both Upstream and Downstream 664.7 264.8 Both Upstream and Downstream PIPE11956 A3 ZPIP15183 7 10 1 RECT_CLOSED 0.010 RCP 235.3 244.3 Both Upstream and Downstream 0.19 447.0 242.5 Both Upstream and Downstream 596.6 249.9 Both Upstream and Downstream 667.1 263.5 Both Upstream and Downstream PIPE11957 A3 ZPIP15184 7 10 1 RECT_CLOSED 0.010 RCP 234.9 243.6 Both Upstream and Downstream 0.19 447.9 243.2 Both Upstream and Downstream 598.1 249.4 Both Upstream and Downstream 668.8 263.0 Both Upstream and Downstream PIPE12058 A3 ZPIP17499 2.5 0 1 CIRCULAR 0.011 RCP 3.0 3.0 None 0.07 4.9 5.0 None 7.4 7.5 None 8.5 8.5 None CULV10163 A3 ZCUL16633 4 4 1 RECT_CLOSED 0.046 RCP 54.7 27.8 None 0.07 94.5 46.9 None 137.2 69.7 None 147.9 79.6 None CULV10164 A3 ZCUL11893 4 10 1 RECT_CLOSED 0.006 RCP 56.5 30.9 None 0.07 93.2 51.9 None 169.3 77.4 None 170.6 91.6 None CHAN10225 A3 ZCH10143A 0 0 1 IRREGULAR 0.020 Earthen 111.2 100.1 None 0.1 182.4 144.9 None 234.7 182.5 None 253.9 204.0 None CHAN10226 A3 ZCH10143A 0 0 1 IRREGULAR 0.020 Earthen 111.2 100.1 None 0.1 182.4 144.9 None 234.7 182.5 None 253.9 203.9 None CHAN10274 A3 0 0 1 IRREGULAR 0.012 Concrete 6.2 6.7 None 0.09 10.1 10.3 None 15.3 14.5 None 17.1 14.9 None PIPE11506 A3 ZPIP12685 1.5 0 1 CIRCULAR 0.204 RCP 2.9 2.9 None 0.06 5.1 5.1 None 7.7 7.7 None 8.8 8.8 None PIPE11913 A3 ZPIP11322 2 0 1 CIRCULAR 0.029 RCP 2.5 2.9 None 0.07 4.0 4.5 None 6.7 6.6 None 7.6 7.5 None PIPE12005 A3 ZPIP15331 2 0 1 CIRCULAR 0.037 RCP 2.8 2.8 None 0.06 4.8 4.9 None 7.3 7.3 None 8.3 8.3 None CULV10159 A3 ZCUL16801 4 4 1 RECT_CLOSED 0.046 RCP 54.0 26.1 None 0.07 97.3 44.1 None 133.2 65.5 None 146.3 74.8 None CHAN10298 A3 CH043D 4 4 1 TRAPEZOIDAL 0.005 Concrete 83.6 59.6 Both Upstream and Downstream 0.1 121.2 76.8 Both Upstream and Downstream 294.5 103.5 Both Upstream and Downstream 284.8 113.5 Both Upstream and Downstream PIPE11544 A3 ZPIP12716 1.5 0 1 CIRCULAR 0.043 RCP 1.5 1.5 None 0.07 2.2 3.1 None 3.1 3.3 None 5.7 3.8 None PIPE11789 A3 ZPIP13606 2.5 0 1 CIRCULAR 0.014 RCP 3.0 3.0 None 0.06 5.0 5.0 None 7.5 7.5 None 8.5 8.5 None PIPE11611 A3 ZPIP12793 1.5 0 1 CIRCULAR 0.090 RCP 2.1 2.1 None 0.07 3.3 3.3 None 4.7 4.7 None 5.3 5.3 None PIPE11869 A3 ZPIP17190 1.5 0 1 CIRCULAR 0.048 RCP 2.0 0.6 Both Upstream and Downstream 0.03 3.6 5.7 Both Upstream and Downstream 0.9 3.8 Both Upstream and Downstream 1.1 4.0 Both Upstream and Downstream PIPE11880 A3 ZPIP14533 1.5 0 1 CIRCULAR 0.086 RCP 2.0 2.0 None 0.06 3.2 3.2 None 70.5 4.8 None 80.1 5.4 None PIPE12049 A3 ZPIP17469 1.5 0 1 CIRCULAR 0.380 RCP 7.2 4.9 None 0.08 12.2 6.8 None 18.3 8.8 None 20.8 11.1 None PIPE12205 A3 6 0 1 CIRCULAR 0.012 RCP 54.7 27.9 None 0.06 93.0 46.9 None 142.2 69.8 None 147.8 79.8 None PIPE12206 A3 6 0 1 CIRCULAR 0.013 RCP 55.0 28.5 None 0.06 93.5 47.9 None 146.1 71.3 None 148.3 81.5 None PIPE12232 A3 ZPIP17192 7 11 1 RECT_CLOSED 0.003 RCP 66.9 54.9 None 0.06 122.7 115.5 None 203.0 126.7 None 275.9 142.3 None PIPE12274 A3 ZPIP11323 2 0 1 CIRCULAR 0.009 RCP 11.1 1.7 Both Upstream and Downstream 0.08 2.8 1.4 Both Upstream and Downstream 4.8 2.8 Both Upstream and Downstream 4.7 3.6 Both Upstream and Downstream DTCH10272 A3 DD10036 0 0 1 IRREGULAR 0.073 CONCRETE 443.7 161.9 None 0.05 744.8 272.1 None 1172.0 509.5 None 1360.4 524.7 None PIPE11668 A3 ZPIP12996 1.5 0 1 CIRCULAR 0.100 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 4.8 Downstream 0.0 5.4 Both Upstream and Downstream PIPE11727 A3 ZPIP13167 1.5 0 1 CIRCULAR 0.042 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.7 None 0.0 3.5 None PIPE11920 A3 ZPIP14856 1.5 0 1 CIRCULAR 0.079 RCP 1.8 1.8 None 0.06 2.8 2.8 None 4.1 4.1 None 4.7 4.7 None PIPE12140 A3 ZPIP12205 3.5 5 1 RECT_OPEN 0.056 RCP 44.1 32.1 None 0.05 69.5 53.3 None 80.7 92.6 None 92.5 97.1 None PIPE12204 A3 ZPIP17216 6 0 1 CIRCULAR 0.015 RCP 54.9 28.3 None 0.05 92.1 47.7 None 145.5 70.9 None 148.3 80.9 None PIPE11529 A3 ZPIP12707 1.5 0 1 CIRCULAR 0.156 RCP 2.4 2.4 None 0.06 3.9 3.9 None 5.6 5.6 None 6.4 6.4 None PIPE11566 A3 ZPIP10228 1.5 0 1 CIRCULAR 0.134 RCP 2.3 2.3 None 0.06 3.6 3.6 None 5.2 5.2 None 5.8 5.8 None PIPE12283 A3 ZPIP11571 1.5 0 1 CIRCULAR 0.039 RCP 0.1 1.3 None 0.06 2.4 4.8 Both Upstream and Downstream 1.4 3.4 Both Upstream and Downstream 1.4 3.1 Both Upstream and Downstream PIPE11552 A3 ZPIP12721 1.5 0 1 CIRCULAR 0.080 RCP 1.6 1.6 None 0.05 2.5 2.5 None 3.6 3.6 None 4.0 4.0 None PIPE11962 A3 ZPIP11518 7 11 1 RECT_CLOSED 0.005 RCP 66.8 55.0 None 0.05 186.0 155.7 None 254.7 134.4 None 295.5 148.0 Downstream PIPE12131 A3 ZPIP16081 7 11 1 RECT_CLOSED 0.005 RCP 66.8 54.7 None 0.05 164.7 196.3 None 264.0 138.9 Downstream 274.0 152.2 Both Upstream and Downstream PIPE11787 A3 ZPIP10677 2.5 0 1 CIRCULAR 0.028 RCP 3.0 3.0 None 0.04 5.0 5.0 None 7.5 7.5 None 8.5 8.6 None PIPE11878 A3 ZPIP17191 7 11 1 RECT_CLOSED 0.006 RCP 66.9 54.9 None 0.05 134.7 121.5 None 219.0 128.1 None 297.0 141.7 None PIPE12078 A3 ZPIP15843 2 0 1 CIRCULAR 0.006 HDPE 0.8 0.8 None 0.05 2.2 1.3 None 11.6 1.9 None 9.2 2.2 None PIPE12245 A3 ZPIP16982 2.5 0 1 CIRCULAR 0.014 RCP 2.2 2.3 None 0.05 3.7 3.7 None 5.5 5.5 None 6.2 6.2 None CHAN10273 A3 0 0 1 IRREGULAR 0.012 Concrete 6.5 6.7 None 0.05 10.4 10.6 None 15.1 15.4 None 16.9 17.2 None PIPE12261 A3 ZPIP14001 3 0 1 CIRCULAR 0.239 RCP 15.7 15.7 None 0.05 25.7 25.7 None 38.4 38.4 None 43.7 43.7 None CHAN10311 A3 CH062A 6 25 1 TRAPEZOIDAL 0.128 Earthen 1.0 89.2 None 0.02 2.4 349.1 None 4.0 569.1 Downstream 4.7 632.4 Downstream PIPE11683 A3 ZPIP10380 3.5 0 1 CIRCULAR 0.010 CIPCP 3.2 3.4 None 0.04 5.2 7.6 None 8.0 9.6 None 9.5 10.8 None CHAN10326 A3 0 0 1 IRREGULAR 0.005 EARTHEN 3.2 3.2 None 0.02 11.3 13.4 None 22.1 18.8 None 16.3 20.8 None PIPE11614 A3 ZPIP10260 2.75 0 1 CIRCULAR 0.099 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 16.6 None 0.0 18.2 Downstream PIPE12062 A3 ZPIP15557 2 0 1 CIRCULAR 0.008 RCP 0.5 0.7 None 0.04 0.8 2.2 None 1.0 2.1 None 1.0 2.3 None PIPE12214 A3 ZPIP11045 1.5 0 1 CIRCULAR 0.115 RCP 0.2 0.0 None 0 1.0 2.1 None 2.5 4.9 Both Upstream and Downstream 3.2 4.1 Both Upstream and Downstream PIPE11617 A3 ZPIP12803 1.5 0 1 CIRCULAR 0.191 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 4.5 None PIPE11641 A3 ZPIP16767 5.5 0 1 CIRCULAR 0.043 RCP 27.4 27.7 None 0.04 45.2 44.1 None 63.8 82.7 None 73.9 66.8 None PIPE12057 A3 ZPIP11690 2.25 0 1 CIRCULAR 0.200 RCP 5.0 5.0 None 0.04 8.1 8.1 None 12.0 12.0 None 13.6 13.6 None PIPE12116 A3 ZPIP15880 4 10 1 TRAPEZOIDAL 0.001 CMP 20.3 12.7 None 0.04 21.3 20.1 None 33.4 29.7 None 37.9 33.8 None PIPE12221 A3 ZPIP11163 1.5 0 1 CIRCULAR 0.006 RCP 0.3 0.3 None 0.04 0.5 0.5 None 0.7 0.7 None 0.8 0.8 None CHAN10219 A3 CH045C 0 0 1 IRREGULAR 0.016 Earthen 32.3 31.7 None 0.07 61.3 44.0 None 97.5 50.0 None 109.0 50.2 None CHAN10322 A3 CH062B 6 25 1 TRAPEZOIDAL 0.227 Earthen 2.8 45.8 None 0.01 21.5 260.9 None 53.0 562.6 None 128.1 634.0 None PIPE11547 A3 ZPIP12719 1.5 0 1 CIRCULAR 0.793 RCP 3.4 3.4 None 0.04 5.3 5.3 None 7.6 7.6 None 8.6 8.6 None PIPE11685 A3 ZPIP13027 1.5 0 1 CIRCULAR 0.025 RCP 0.0 0.0 None 0 0.0 0.4 None 0.3 1.1 None 0.5 1.4 None PIPE11790 A3 ZPIP10701 2.5 0 1 CIRCULAR 0.051 RCP 3.0 3.0 None 0.03 4.9 5.0 None 7.4 7.5 None 8.5 8.5 None PIPE11915 A3 ZPIP14828 1.5 0 1 CIRCULAR 0.109 RCP 3.7 0.1 None 0 0.4 0.0 None 14.6 3.8 None 11.1 3.3 Both Upstream and Downstream PIPE12077 A3 ZPIP15842 1.5 0 1 CIRCULAR 0.048 HDPE 0.9 0.9 None 0.04 1.3 1.3 None 11.6 1.9 None 9.2 2.2 None PIPE12130 A3 ZPIP17639 2.5 0 1 CIRCULAR 0.056 RCP 3.0 3.0 None 0.03 4.9 5.0 None 7.4 7.5 None 8.5 8.5 None CHAN10275 A3 0 0 1 IRREGULAR 0.012 Concrete 5.8 6.0 None 0.04 9.9 9.7 None 13.4 13.8 None 15.2 14.5 None PIPE11752 A3 ZPIP13187 1.5 0 1 CIRCULAR 0.079 RCP 0.7 0.7 None 0.03 1.3 1.3 None 2.0 2.0 None 2.3 2.3 None PIPE12027 A3 ZPIP15430 1.5 0 1 CIRCULAR 0.005 RCP 0.4 0.3 None 0.04 0.7 0.4 None 1.1 0.6 None 1.3 0.6 None PIPE12153 A3 ZPIP16526 3.75 2.417 1 VERT_ELLIPSE 0.005 RCP 0.8 1.7 None 0.03 2.1 3.0 None 3.6 3.5 None 3.5 3.7 Downstream CULV10166 A3 ZCUL070C 2 6 3 RECT_CLOSED 0.004 RCP 7.3 5.6 None 0.03 12.0 12.3 None 19.8 20.3 None 18.4 18.7 None CHAN10220 A3 CH045C 0 0 1 IRREGULAR 0.020 Earthen 32.7 30.9 None 0.06 60.3 39.9 None 93.3 43.4 None 103.8 43.1 None CHAN10272 A3 0 0 1 IRREGULAR 0.032 Concrete 7.1 7.1 None 0.03 11.2 11.2 None 16.3 16.4 None 18.4 18.6 None PIPE11848 A3 ZPIP11033 3 0 1 CIRCULAR 0.013 RCP 1.8 1.9 None 0.03 3.2 3.1 None 3.8 4.5 None 4.6 5.1 None PIPE12196 A3 PIP10967 1.5 0 1 CIRCULAR 0.003 PVC 0.2 0.1 None 0.01 0.5 0.2 None 0.5 0.5 None 0.5 0.4 None PIPE12303 A3 ZPIP15926 5.5 0 1 CIRCULAR 0.002 RCP 3.2 3.2 None 0.02 5.3 5.3 None 8.1 8.1 None 9.3 9.3 None PIPE12309 A3 ZPIP14606 3 0 1 CIRCULAR 0.029 RCP 0.0 0.0 None 0 0.3 0.0 None 25.5 1.5 None 180.2 7.6 None DTCH10277 A3 CH063A 0 0 1 IRREGULAR 0.013 Earthen 490.1 139.3 None 0.02 706.4 252.4 Upstream 1400.5 498.5 Both Upstream and Downstream 1700.0 506.2 Both Upstream and Downstream PIPE11694 A3 ZPIP13067 1.5 0 1 CIRCULAR 0.017 RCP 0.2 0.1 None 0 0.4 0.1 None 0.4 0.8 None 0.5 0.8 None PIPE11881 A3 ZPIP14534 1.5 0 1 CIRCULAR 0.010 RCP 0.0 0.0 None 0 0.0 0.0 None 10.2 0.5 None 4.8 0.6 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 39 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE11895 A3 ZPIP14613 1.5 0 1 CIRCULAR 0.062 RCP 0.7 0.7 None 0.02 1.0 1.0 None 9.8 1.5 None 5.9 1.7 None CULV10158 A3 ZCUL065D 3 6 1 RECT_CLOSED 0.107 RCP 15.3 15.4 None 0.02 24.0 24.1 None 35.0 35.0 None 39.4 39.4 None PIPE12275 A3 ZPIP11324 1.5 0 1 CIRCULAR 0.007 RCP 3.6 2.0 Both Upstream and Downstream 0.22 1.0 0.7 Both Upstream and Downstream 0.5 0.6 Both Upstream and Downstream 0.6 0.5 Both Upstream and Downstream PIPE12308 A3 ZPIP14605 1.5 0 1 CIRCULAR 0.006 RCP 0.0 0.0 None 0 0.1 0.0 None 1.5 0.5 None 9.6 0.5 None PIPE11627 A3 ZPIP10265 1.5 0 1 CIRCULAR 0.017 RCP 0.1 0.0 None 0 0.1 0.0 None 0.2 0.7 None 0.2 0.7 None PIPE11862 A3 ZPIP14304 2 0 1 CIRCULAR 0.024 RCP 0.7 0.7 None 0.02 1.0 1.1 None 1.5 1.6 None 1.7 1.8 None PIPE11916 A3 ZPIP14829 1.5 0 1 CIRCULAR 0.009 RCP 2.0 0.0 None 0 0.1 0.0 None 5.4 0.1 None 4.0 0.5 Both Upstream and Downstream PIPE12236 A3 ZPIP17119 4 10 3 RECT_CLOSED 0.029 RCP 66.9 55.2 None 0.02 114.8 83.1 None 197.7 120.1 None 230.4 137.8 None PIPE12272 A3 ZPIP11137 2 0 1 CIRCULAR 0.018 RCP 5.1 1.1 Both Upstream and Downstream 0.04 0.5 1.5 Both Upstream and Downstream 2.1 1.7 Both Upstream and Downstream 3.7 1.5 Both Upstream and Downstream DTCH10270 A3 ZDD10019 0 0 1 IRREGULAR 0.006 CONCRETE 25.6 8.0 None 0.03 31.4 10.2 None 30.7 14.1 None 32.7 15.6 None PIPE11811 A3 ZPIP10842 2.5 0 1 CIRCULAR 0.107 RCP 2.0 2.1 None 0.02 3.3 3.3 None 4.8 4.8 None 5.4 5.5 None PIPE11875 A3 ZPIP14491 1.5 0 1 CIRCULAR 0.569 RCP 1.2 1.2 Both Upstream and Downstream 0.01 1.9 1.9 Both Upstream and Downstream 2.9 2.4 Both Upstream and Downstream 3.3 2.9 Both Upstream and Downstream PIPE11948 A3 ZPIP17282 3 6 1 RECT_CLOSED 0.072 RCP 7.5 7.5 None 0.01 12.0 12.0 None 17.7 17.7 None 20.1 20.1 Downstream PIPE11950 A3 ZPIP17290 1.5 0 1 CIRCULAR 0.010 RCP 0.0 0.0 None 0 0.1 0.0 None 0.5 0.3 None 0.4 0.4 None PIPE12238 A3 ZPIP17119 4 10 3 RECT_CLOSED 0.029 RCP 61.5 49.2 None 0.02 106.1 74.1 None 164.4 107.8 None 201.8 123.6 None DTCH10252 A3 DD047B 0 0 1 IRREGULAR 0.001 Earthen 22.8 17.8 None 0.01 47.6 34.4 None 69.7 81.8 None 80.2 90.3 None CHAN10295 A3 CH060B 0 0 1 IRREGULAR 0.001 Earthen 134.6 65.8 Both Upstream and Downstream 0.01 509.2 131.3 Both Upstream and Downstream 587.5 143.4 Both Upstream and Downstream 397.4 172.5 Both Upstream and Downstream PIPE11619 A3 ZPIP10261 1.5 0 1 CIRCULAR 0.132 RCP 0.0 1.0 None 0.03 0.3 2.5 None 0.6 1.4 None 0.7 1.2 None PIPE11749 A3 ZPIP13184 1.5 0 1 CIRCULAR 0.061 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.1 None 0.0 0.8 None PIPE11793 A3 ZPIP10787 1.5 0 1 CIRCULAR 0.012 RCP 0.2 0.5 None 0.05 0.4 0.3 None 0.6 0.4 None 0.6 0.4 None PIPE11810 A3 ZPIP10841 2.5 0 1 CIRCULAR 0.049 RCP 0.9 0.9 None 0.01 1.5 1.5 None 2.2 2.2 None 2.5 2.5 None PIPE11853 A3 ZPIP14296 1.5 0 1 CIRCULAR 0.011 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.2 None 0.0 0.3 None PIPE11882 A3 ZPIP11162 1 0 1 CIRCULAR 0.014 HDPE 0.0 0.0 None 0 0.0 0.0 None 6.0 0.1 None 2.8 0.1 None PIPE12160 A3 ZPIP17887 10 10 1 RECT_OPEN 0.065 RCP 29.8 32.1 None 0.01 62.8 58.3 None 89.3 90.5 Upstream 101.8 102.6 Upstream PIPE12237 A3 ZPIP17119 4 10 3 RECT_CLOSED 0.029 RCP 33.6 33.5 None 0.01 54.8 54.7 None 81.6 81.6 None 95.3 94.5 None DTCH10249 A3 DD047A 0 0 1 IRREGULAR 0.001 Earthen 25.0 21.7 None 0.01 52.2 36.3 None 74.1 96.9 None 85.2 104.5 None PIPE12271 A3 ZPIP11136 1.5 0 1 CIRCULAR 0.018 RCP 0.3 0.4 Both Upstream and Downstream 0.03 0.1 0.5 Both Upstream and Downstream 0.5 0.5 Both Upstream and Downstream 1.0 0.5 Both Upstream and Downstream PIPE12317 A3 ZPIP14867 2 0 1 CIRCULAR 0.204 RCP 1.0 0.3 None 0 2.2 2.7 None 3.0 2.9 Both Upstream and Downstream 2.7 3.0 Both Upstream and Downstream CHAN10323 A3 0 0 1 IRREGULAR 0.005 EARTHEN 5.1 5.1 None 0.01 8.6 8.6 None 12.0 12.0 None 14.1 14.1 None FLOW10021 A3 0 0 1 IRREGULAR 0.001 Road 31.3 30.4 None 0.01 53.5 49.2 None 82.6 70.1 None 95.0 81.5 None PIPE11874 A3 ZPIP14490 1.5 0 1 CIRCULAR 0.018 RCP 0.3 0.3 Both Upstream and Downstream 0.02 0.1 0.7 Both Upstream and Downstream 0.1 0.3 Both Upstream and Downstream 0.1 0.3 Both Upstream and Downstream PIPE11879 A3 ZPIP14532 1.5 0 1 CIRCULAR 0.033 RCP 0.0 0.0 None 0 0.0 0.0 None 7.2 0.6 None 4.8 0.5 None PIPE11976 A3 ZPIP15244 1.5 0 1 CIRCULAR 0.020 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.1 None 0.0 0.3 None PIPE11979 A3 ZPIP17397 1.5 0 1 CIRCULAR 0.013 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.2 None PIPE12083 A3 ZPIP15857 2 0 1 CIRCULAR 0.004 HDPE 0.3 0.1 None 0.01 9.6 0.2 None 18.3 0.3 None 26.6 0.3 None PIPE12103 A3 ZPIP15871 1 0 1 CIRCULAR 0.006 HDPE 0.7 0.0 None 0.01 0.3 0.0 None 0.6 0.1 None 0.3 0.1 None PIPE12109 A3 ZPIP15877 2 0 1 CIRCULAR 0.005 HDPE 3.6 0.0 None 0 12.4 0.1 None 4.7 0.3 None 3.2 0.3 None CHAN10193 A3 CH052 0 0 1 IRREGULAR 0.003 Concrete 161.7 172.2 Upstream 0.01 270.9 288.3 Upstream 406.1 394.6 Upstream 464.1 425.3 Upstream CHAN10194 A3 CH052 0 0 1 IRREGULAR 0.002 Concrete 161.3 172.1 None 0.01 271.3 289.4 None 405.8 394.3 Downstream 463.6 424.4 Downstream CHAN10264 A3 CH029 0 0 1 IRREGULAR 0.005 Concrete 194.8 225.2 None 0.01 328.0 359.7 None 490.9 482.8 None 555.1 520.2 None CHAN10265 A3 CH029 0 0 1 IRREGULAR 0.005 Concrete 194.1 224.0 None 0.01 326.5 357.0 None 484.3 480.6 None 529.5 512.6 None CHAN10268 A3 ZCH10109 0 0 1 IRREGULAR 0.002 Concrete 180.1 212.2 None 0.01 303.8 337.1 None 441.5 425.6 None 504.0 480.8 None CHAN10269 A3 ZCH10109 0 0 1 IRREGULAR 0.002 Concrete 170.7 191.8 None 0.01 284.8 307.2 None 414.2 397.8 None 474.3 428.6 None PIPE12266 A3 ZPIP10961 3 0 1 CIRCULAR 0.090 RCP 0.1 3.9 Downstream 0.02 0.2 7.2 Both Upstream and Downstream 2.4 5.6 Both Upstream and Downstream 2.0 4.4 Both Upstream and Downstream PIPE12270 A3 ZPIP11135 1.5 0 1 CIRCULAR 0.040 RCP 2.6 0.4 Both Upstream and Downstream 0.02 0.1 0.5 Both Upstream and Downstream 0.6 0.5 Both Upstream and Downstream 1.1 0.5 Both Upstream and Downstream DTCH10273 A3 CH063A 0 0 1 IRREGULAR 0.013 Earthen 238.2 69.7 None 0 405.7 125.0 Downstream 604.7 244.4 Both Upstream and Downstream 752.3 247.5 Both Upstream and Downstream DTCH10274 A3 CH063A 0 0 1 IRREGULAR 0.013 Earthen 238.2 69.7 None 0 405.7 125.0 Downstream 604.7 244.4 Both Upstream and Downstream 752.3 247.5 Both Upstream and Downstream PIPE12307 A3 ZPIP14604 1.5 0 1 CIRCULAR 0.033 RCP 0.0 0.0 None 0 0.0 0.0 None 5.2 0.0 None 38.8 0.3 None CHAN10324 A3 0 0 1 IRREGULAR 0.007 EARTHEN 4.2 4.2 None 0.01 7.2 7.2 None 9.8 9.9 None 11.1 11.1 None PIPE11744 A3 ZPIP13179 1.5 0 1 CIRCULAR 0.010 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.1 None 0.0 0.1 None PIPE11781 A3 ZPIP10621 2 0 1 CIRCULAR 0.002 CMP 0.2 0.1 None 0.01 0.3 0.1 None 0.3 0.1 None 0.3 0.0 None PIPE11802 A3 ZPIP17043 1.5 0 1 CIRCULAR 0.002 RCP 0.6 0.1 None 0.03 1.1 0.1 None 1.3 0.1 None 1.5 0.1 None PIPE11817 A3 ZPIP13907 1.5 0 1 CIRCULAR 0.010 RCP 0.0 0.0 None 0 0.1 0.1 None 0.2 0.1 None 0.2 0.1 None PIPE11825 A3 ZPIP13926 4 0 1 CIRCULAR 0.031 RCP 0.0 0.0 None 0 0.0 0.1 None 0.1 1.4 None 0.1 1.8 None PIPE11834 A3 ZPIP13970 1.5 0 1 CIRCULAR 0.005 RCP 0.0 0.0 None 0 0.0 0.0 None 0.1 0.1 None 0.1 0.1 None PIPE11857 A3 ZPIP14302 1.5 0 1 CIRCULAR 0.004 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.1 None 0.0 0.1 None PIPE11892 A3 ZPIP11207 1.5 0 1 CIRCULAR 0.008 RCP 0.0 0.1 None 0.01 0.1 0.1 None 0.1 0.1 None 0.9 0.1 None PIPE11911 A3 ZPIP14789 2 0 1 CIRCULAR 0.001 RCP 0.2 0.1 None 0.01 0.3 0.1 None 0.2 0.1 None 0.1 0.1 None PIPE11912 A3 ZPIP14790 1.5 0 1 CIRCULAR 0.005 RCP 0.1 0.0 None 0 0.2 0.0 None 0.2 0.0 None 0.1 0.0 None PIPE11955 A3 ZPIP15156 1.333 2.083 2 RECT_CLOSED 0.025 CMP 0.2 0.2 None 0.01 0.3 0.2 None 0.3 0.2 None 0.3 0.3 None PIPE11980 A3 ZPIP17398 1.5 0 1 CIRCULAR 0.020 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.1 None PIPE11982 A3 ZPIP11548 1.5 0 1 CIRCULAR 0.013 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.1 None PIPE12025 A3 ZPIP15426 1.5 0 1 CIRCULAR 0.005 RCP 0.1 0.1 None 0.01 0.2 0.1 None 0.2 0.0 None 0.3 0.0 None PIPE12100 A3 ZPIP11870 1 0 1 CIRCULAR 0.009 HDPE 0.3 0.0 None 0 0.6 0.0 None 1.2 0.0 None 0.7 0.0 None PIPE12101 A3 ZPIP11871 1 0 1 CIRCULAR 0.009 HDPE 0.3 0.0 None 0 0.5 0.0 None 1.1 0.0 None 0.6 0.0 None PIPE12183 A3 PIP14889 1.5 0 1 CIRCULAR 0.098 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.5 None 0.2 0.4 None PIPE12208 A3 ZPIP11206 1.5 0 1 CIRCULAR 0.017 RCP 0.0 0.0 None 0 0.0 0.0 None 0.1 0.1 None 0.1 0.1 None DTCH10248 A3 DD047A 0 0 1 IRREGULAR 0.008 Earthen 26.4 24.4 None 0 53.4 40.5 None 75.8 80.4 None 87.3 87.1 Upstream DTCH10250 A3 DD047A 0 0 1 IRREGULAR 0.010 Earthen 25.3 19.5 None 0 50.0 35.5 None 72.4 98.8 Downstream 83.4 111.0 Downstream DTCH10251 A3 DD047B 0 0 1 IRREGULAR 0.012 Earthen 24.9 19.3 None 0 49.6 35.4 None 71.9 96.7 None 82.9 108.7 Upstream CHAN10195 A3 ZCH10023 0 0 1 IRREGULAR 0.006 Concrete 163.7 174.0 None 0 270.9 284.4 None 405.3 392.9 Upstream 464.1 424.9 Upstream CHAN10196 A3 ZCH10023 0 0 1 IRREGULAR 0.006 Concrete 161.6 171.6 None 0 269.5 285.0 Downstream 403.6 391.8 Downstream 461.7 422.9 Downstream CHAN10206 A3 CH029-2 0 0 1 IRREGULAR 0.004 Concrete 192.4 226.4 None 0 332.0 357.3 None 469.3 478.8 None 498.8 491.7 None CHAN10207 A3 CH029-2 0 0 1 IRREGULAR 0.004 Concrete 190.3 218.6 None 0 337.2 359.5 None 446.0 461.2 None 434.3 454.3 None CHAN10208 A3 CH029-2 0 0 1 IRREGULAR 0.004 Concrete 189.9 216.6 None 0 346.5 366.5 None 414.0 437.4 None 350.3 414.9 None DTCH10257 A3 DD047D 0 0 1 IRREGULAR 0.011 Earthen 37.4 31.7 None 0 78.8 57.7 None 112.2 105.1 None 128.0 112.1 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 40 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
CHAN10210 A3 CH10142A 0 0 1 IRREGULAR 0.004 Earthen 193.2 219.8 None 0 331.3 360.6 Upstream 365.0 429.6 Upstream 273.9 391.8 Upstream CHAN10212 A3 CH10142B 0 0 1 IRREGULAR 0.005 Earthen 248.1 267.3 Upstream 0 378.0 413.2 Upstream 365.3 507.2 Upstream 384.6 578.6 Upstream CHAN10213 A3 CH10142B 0 0 1 IRREGULAR 0.002 Earthen 239.8 253.7 None 0.01 346.4 379.3 None 282.8 420.3 None 303.4 454.6 None CHAN10214 A3 CH10142B 0 0 1 IRREGULAR 0.002 Earthen 239.2 247.8 None 0.01 324.5 358.3 None 299.1 364.6 None 323.7 375.9 None CHAN10215 A3 CH10142B 0 0 1 IRREGULAR 0.002 Earthen 238.7 245.0 None 0.01 296.7 330.4 None 316.1 313.3 None 343.6 309.4 None CHAN10216 A3 CH10142B 0 0 1 IRREGULAR 0.002 Earthen 238.2 244.1 None 0.01 283.1 301.8 None 380.7 266.1 None 449.2 255.1 None CHAN10217 A3 CH10142B 0 0 1 IRREGULAR 0.002 Earthen 237.3 243.8 None 0.01 351.5 274.9 None 486.7 245.4 None 560.9 258.7 None CHAN10234 A3 CH044 0 0 1 IRREGULAR 0.007 Earthen 110.4 108.4 None 0 214.7 193.2 None 319.2 278.9 None 364.9 309.5 None CHAN10235 A3 CH044 0 0 1 IRREGULAR 0.007 Earthen 110.6 108.2 None 0 211.8 191.9 None 316.4 270.9 None 359.7 306.5 None CHAN10236 A3 CH044 0 0 1 IRREGULAR 0.007 Earthen 109.7 107.3 None 0 207.2 187.9 None 309.7 263.7 None 351.5 298.9 None CHAN10237 A3 CH044 0 0 1 IRREGULAR 0.007 Earthen 109.2 106.8 None 0 204.6 185.0 None 305.4 258.8 None 346.7 294.6 None CHAN10240 A3 CH044 0 0 1 IRREGULAR 0.007 Earthen 107.0 102.3 None 0 166.5 137.7 None 224.5 171.5 None 242.4 181.9 None CHAN10258 A3 ZCH10042 0 0 1 IRREGULAR 0.008 Concrete 57.2 57.3 None 0 93.7 94.4 None 144.4 144.3 None 164.7 150.0 None CHAN10262 A3 CH029 0 0 1 IRREGULAR 0.014 Concrete 194.8 225.7 None 0 327.5 359.1 None 490.5 482.7 None 559.2 519.9 None CHAN10263 A3 CH029 0 0 1 IRREGULAR 0.005 Concrete 194.7 225.1 None 0.01 327.2 358.5 None 490.3 482.6 None 559.6 519.7 None CHAN10266 A3 CH029 0 0 1 IRREGULAR 0.014 Concrete 194.0 223.3 None 0 326.3 355.9 None 477.7 479.0 None 518.0 505.0 Downstream CHAN10267 A3 ZCH10109 0 0 1 IRREGULAR 0.005 Concrete 185.9 226.7 None 0.01 315.3 352.9 None 458.8 452.4 None 521.2 512.9 None CHAN10270 A3 ZCH10109 0 0 1 IRREGULAR 0.002 Concrete 163.5 176.4 None 0.01 269.1 284.6 None 400.0 387.2 None 458.0 418.3 None CHAN10271 A3 ZCH10109 0 0 1 IRREGULAR 0.006 Concrete 161.0 171.2 None 0 265.4 277.4 None 396.8 384.3 None 454.7 415.7 Downstream CHAN10304 A3 CH10142B 0 0 1 IRREGULAR 0.002 Earthen 243.8 260.9 None 0 365.0 398.1 None 280.5 471.4 None 296.8 527.8 None CHAN10325 A3 0 0 1 IRREGULAR 0.007 EARTHEN 3.6 3.6 None 0 5.9 5.9 None 9.6 10.1 None 10.5 10.6 None DTCH10244 A3 DD047C 0 0 1 IRREGULAR 0.025 Earthen 22.5 22.6 None 0 42.2 42.3 None 64.8 65.1 None 74.4 74.6 None PIPE11503 A3 ZPIP16728 1.5 0 1 CIRCULAR 0.054 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11504 A3 ZPIP10202 1.5 0 1 CIRCULAR 0.019 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11507 A3 ZPIP10207 1.5 0 1 CIRCULAR 0.059 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11514 A3 ZPIP10209 1.5 0 1 CIRCULAR 0.019 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11515 A3 ZPIP10210 1.5 0 1 CIRCULAR 0.009 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11518 A3 ZPIP12699 1.5 0 1 CIRCULAR 0.022 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11524 A3 ZPIP10213 1.5 0 1 CIRCULAR 0.009 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11526 A3 ZPIP12704 1.5 0 1 CIRCULAR 0.092 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11531 A3 ZPIP10214 1.5 0 1 CIRCULAR 0.039 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11540 A3 ZPIP10217 1.5 0 1 CIRCULAR 0.018 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11548 A3 ZPIP12720 1.5 0 1 CIRCULAR 0.010 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11559 A3 ZPIP12726 1.5 0 1 CIRCULAR 0.096 RCP 0.0 0.0 None 0 0.1 0.1 None 0.1 0.1 None 0.1 0.1 None PIPE11570 A3 ZPIP12736 1.5 0 1 CIRCULAR 0.028 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11575 A3 ZPIP12741 1.5 0 1 CIRCULAR 0.019 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11592 A3 ZPIP16745 1.5 0 1 CIRCULAR 0.009 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11597 A3 ZPIP12784 1.5 0 1 CIRCULAR 0.010 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11598 A3 ZPIP12785 1.5 0 1 CIRCULAR 0.117 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11609 A3 ZPIP10256 1.5 0 1 CIRCULAR 0.009 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11618 A3 ZPIP12804 1.5 0 1 CIRCULAR 0.120 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11625 A3 ZPIP12809 1.5 0 1 CIRCULAR 0.460 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11630 A3 ZPIP12811 1.5 0 1 CIRCULAR 0.218 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11639 A3 ZPIP12820 1.5 0 1 CIRCULAR 0.057 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11651 A3 ZPIP16770 1.5 0 1 CIRCULAR 0.052 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11675 A3 ZPIP10368 1.5 0 1 CIRCULAR 0.484 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11676 A3 ZPIP10369 1.5 0 1 CIRCULAR 0.042 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11696 A3 ZPIP10402 3.5 0 1 CIRCULAR 0.033 RCP 0.0 0.0 None 0 0.0 0.0 None 3.0 0.0 None 5.4 0.0 None PIPE11701 A3 ZPIP16859 2 0 1 CIRCULAR 0.010 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11705 A3 ZPIP13080 1.5 0 1 CIRCULAR 0.012 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11722 A3 ZPIP16885 1.5 0 1 CIRCULAR 0.026 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11726 A3 ZPIP13166 1.5 0 1 CIRCULAR 0.059 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11736 A3 ZPIP13173 2 0 1 CIRCULAR 0.314 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11737 A3 ZPIP13174 2 0 1 CIRCULAR 0.040 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11738 A3 ZPIP10460 1.5 0 1 CIRCULAR 0.039 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11740 A3 ZPIP10462 1.5 0 1 CIRCULAR 0.055 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11742 A3 ZPIP13177 1.5 0 1 CIRCULAR 0.047 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11759 A3 ZPIP13191 1.5 0 1 CIRCULAR 0.235 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11760 A3 ZPIP13192 1.5 0 1 CIRCULAR 0.076 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11762 A3 ZPIP13194 1.5 0 1 CIRCULAR 0.096 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11777 A3 ZPIP10475 1.5 0 1 CIRCULAR 0.061 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11785 A3 ZPIP10673 2 0 1 CIRCULAR 0.012 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11786 A3 ZPIP10674 1.5 0 1 CIRCULAR 0.020 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11788 A3 ZPIP13598 1.5 0 1 CIRCULAR 0.085 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11791 A3 ZPIP10702 1.5 0 1 CIRCULAR 0.550 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11803 A3 ZPIP10796 1.5 0 1 CIRCULAR 0.116 CSP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11833 A3 ZPIP13969 1.5 0 1 CIRCULAR 0.022 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11839 A3 ZPIP13995 1.5 0 1 CIRCULAR 0.030 RCP 0.1 0.0 None 0 0.1 0.0 None 0.0 0.0 None 0.1 0.0 None PIPE11849 A3 ZPIP14278 1.5 0 1 CIRCULAR 0.104 RCP 0.7 0.0 None 0 1.0 0.0 None 1.3 0.0 None 1.4 0.0 None PIPE11854 A3 ZPIP14297 1.5 0 1 CIRCULAR 0.059 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11856 A3 ZPIP14301 1.5 0 1 CIRCULAR 0.016 RCP 1.7 0.0 None 0 1.2 0.0 None 2.3 0.0 None 2.4 0.0 None PIPE11883 A3 ZPIP11164 1.5 0 1 CIRCULAR 0.194 RCP 0.0 0.0 None 0 0.0 0.0 None 41.4 0.0 None 59.2 0.0 None PIPE11884 A3 ZPIP14535 1.5 0 1 CIRCULAR 0.088 RCP 0.0 0.0 None 0 0.0 0.0 None 8.7 0.0 None 104.4 0.0 None PIPE11886 A3 ZPIP17209 1.5 0 1 CIRCULAR 0.041 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11887 A3 ZPIP17210 1.5 0 1 CIRCULAR 0.035 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11890 A3 ZPIP11203 1.5 0 1 CIRCULAR 0.044 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 41 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE11902 A3 ZPIP11213 1.5 0 1 CIRCULAR 0.011 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.1 0.0 None PIPE11932 A3 ZPIP11348 1.5 0 1 CIRCULAR 0.148 RCP 0.0 0.0 None 0 0.1 0.0 None 0.1 0.0 None 0.1 0.2 None PIPE11933 A3 ZPIP11349 1.5 0 1 CIRCULAR 0.063 RCP 0.0 0.0 None 0 0.1 0.1 None 0.4 0.1 None 0.1 0.1 None PIPE11939 A3 ZPIP14882 1.5 0 1 CIRCULAR 0.772 RCP 0.0 0.0 None 0 0.0 0.0 None 0.1 0.0 None 0.1 0.1 None PIPE11940 A3 ZPIP11350 1.5 0 1 CIRCULAR 0.069 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.1 None 0.0 0.1 None PIPE11942 A3 ZPIP14883 1.5 0 1 CIRCULAR 0.032 RCP 0.0 0.0 None 0 0.0 0.0 None 0.2 0.0 None 0.1 0.0 None PIPE11947 A3 ZPIP14890 1 0 1 CIRCULAR 0.030 CSP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11972 A3 ZPIP11545 1.5 0 1 CIRCULAR 0.013 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11978 A3 ZPIP17396 1.5 0 1 CIRCULAR 0.013 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.1 None PIPE11981 A3 ZPIP17399 1.5 0 1 CIRCULAR 0.020 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11992 A3 ZPIP15321 2 0 1 CIRCULAR 0.027 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.1 None 0.0 0.1 None PIPE11993 A3 ZPIP15322 1.667 0 1 CIRCULAR 0.027 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE11997 A3 ZPIP11591 3 0 1 CIRCULAR 0.008 RCP 0.0 0.0 None 0 0.0 0.0 None 0.1 0.1 None 0.1 0.1 None PIPE11999 A3 ZPIP11593 1.5 0 1 CIRCULAR 0.045 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE12001 A3 ZPIP15327 1.5 0 1 CIRCULAR 0.050 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE12002 A3 ZPIP15328 1.5 0 1 CIRCULAR 0.149 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE12003 A3 ZPIP15329 1.5 0 1 CIRCULAR 0.034 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE12004 A3 ZPIP15330 1.5 0 1 CIRCULAR 0.041 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE12030 A3 ZPIP11650 1.5 0 1 CIRCULAR 0.066 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE12036 A3 ZPIP15436 1.5 0 1 CIRCULAR 0.064 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE12045 A3 ZPIP11656 2.5 0 1 CIRCULAR 0.281 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE12079 A3 ZPIP11860 1.5 0 1 CIRCULAR 0.019 HDPE 0.0 0.0 None 0 0.0 0.0 None 15.5 0.0 None 25.7 0.0 None PIPE12080 A3 ZPIP11862 1.5 0 1 CIRCULAR 0.005 HDPE 0.0 0.0 None 0 5.8 0.0 None 15.0 0.0 None 25.7 0.0 None PIPE12096 A3 ZPIP15867 0 0 1 DUMMY 0.001 CMP 28.3 12.7 Downstream 0 36.4 20.1 Downstream 39.5 29.7 Downstream 39.4 33.8 Downstream PIPE12105 A3 ZPIP15873 1 0 1 CIRCULAR 0.045 HDPE 0.2 0.0 None 0 0.3 0.0 None 1.0 0.0 None 0.6 0.0 None PIPE12110 A3 ZPIP11873 1.5 0 1 CIRCULAR 0.005 HDPE 1.8 0.0 None 0 8.8 0.0 None 5.9 0.0 None 2.5 0.0 None PIPE12113 A3 ZPIP11876 1.5 0 1 CIRCULAR 0.032 HDPE 1.8 0.0 None 0 1.9 0.0 None 1.4 0.0 None 1.5 0.0 None PIPE12118 A3 ZPIP17593 2 0 1 CIRCULAR 0.095 RCP 0.1 0.0 None 0 0.1 0.0 None 0.1 0.0 None 0.1 0.0 None PIPE12138 A3 ZPIP17832 0 0 1 IRREGULAR 0.010 RCP 35.2 31.4 None 0 54.2 60.2 Both Upstream and Downstream 67.5 74.2 Both Upstream and Downstream 65.3 57.9 Both Upstream and Downstream PIPE12139 A3 ZPIP17833 0 0 1 DUMMY 0.001 RCP 113.6 126.2 Downstream 0 172.9 201.8 Downstream 251.3 266.4 Downstream 264.9 289.4 Downstream PIPE12141 A3 ZPIP16493 0 0 1 DUMMY 0.014 RCP 35.7 34.1 None 0 60.7 53.0 None 95.9 71.0 None 111.2 74.2 None PIPE12142 A3 ZPIP17834 0 0 1 DUMMY 0.029 RCP 1.9 2.9 None 0 2.9 4.5 Downstream 5.4 6.6 Downstream 5.9 7.5 Downstream PIPE12143 A3 ZPIP16497 0 0 1 DUMMY 0.016 Earthen 6.2 4.9 None 0 7.6 7.9 None 11.4 11.6 None 12.9 13.2 None PIPE12144 A3 ZPIP16498 0 0 1 DUMMY 0.005 PVC 0.4 0.0 None 0 0.5 0.0 None 0.4 0.0 None 0.5 0.0 Downstream PIPE12157 A3 ZPIP16536 0 0 1 DUMMY 0.079 RCP 4.2 5.0 None 0 7.8 9.1 None 12.1 13.4 None 13.7 13.8 None PIPE12159 A3 ZPIP17873 2 0 1 CIRCULAR 0.010 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None FLOW10017 A3 ZPIP19009 0 0 1 DUMMY 0.002 CIPCP 511.4 486.9 None 0 853.3 595.1 None 1220.1 1095.2 None 1335.6 1148.0 None FLOW10018 A3 ZPIP19010 0 0 1 DUMMY 0.001 RCP 28.7 29.8 None 0 46.9 50.3 None 69.4 75.5 None 80.8 87.4 None FLOW10019 A3 ZPIP19011 0 0 1 DUMMY 0.001 RCP 24.3 26.0 None 0 40.7 43.9 None 56.3 66.8 None 63.9 76.5 None PIPE12201 A3 ZPIP11867 0 0 1 DUMMY 0.000 CMP 26.0 23.1 None 0 83.1 37.0 Downstream 77.9 55.4 Downstream 84.3 62.0 Downstream PIPE12203 A3 ZPIP17217 2 0 1 CIRCULAR 3.402 RCP 0.0 0.0 None 0 0.0 0.0 None 176.4 0.0 None 62.9 0.0 None PIPE12207 A3 ZPIP11205 1.5 0 1 CIRCULAR 0.127 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE12226 A3 0 0 1 IRREGULAR 0.023 RCP 16.9 17.0 None 0 29.1 29.1 None 44.1 44.1 None 50.4 50.4 None PIPE12229 A3 ZPIP10362 1.5 0 1 CIRCULAR 0.012 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE12230 A3 ZPIP13074 1.5 0 1 CIRCULAR 0.275 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.1 None FLOW10020 A3 0 0 1 IRREGULAR 0.014 Road 12.2 11.3 None 0 23.0 22.3 None 35.3 35.2 None 40.7 40.4 Downstream PIPE12250 A3 0 0 1 IRREGULAR 0.012 RCP 10.9 10.9 None 0 19.4 19.4 None 29.4 31.5 Downstream 36.9 39.1 Downstream PIPE12254 A3 ZPIP14859 1.5 0 1 CIRCULAR 0.015 PVC 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE12256 A3 ZPIP11340 1.5 0 1 CIRCULAR 0.023 PVC 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None DTCH10245 A3 BD002 0 0 1 IRREGULAR 0.014 CONCRETE 11.4 11.4 None 0 18.8 18.7 None 28.0 27.8 None 32.1 31.8 None DTCH10246 A3 BD002 0 0 1 IRREGULAR 0.007 CONCRETE 10.2 10.2 None 0 17.1 17.1 None 26.4 25.4 None 30.6 30.3 None DTCH10247 A3 BD002 0 0 1 IRREGULAR 0.014 CONCRETE 10.1 10.2 None 0 16.4 16.8 None 25.7 24.8 None 29.5 29.9 None DTCH10253 A3 DD047B 0 0 1 IRREGULAR 0.012 Earthen 22.2 17.5 None 0 45.5 34.0 None 68.7 49.9 None 79.8 56.0 Downstream CHAN10197 A3 CH046A 0 0 1 IRREGULAR 0.113 Earthen 26.5 26.7 None 0 41.7 42.1 None 63.3 58.8 None 75.2 65.0 None CHAN10198 A3 CH046A 0 0 1 IRREGULAR 0.018 Earthen 26.5 26.6 None 0 41.6 41.9 None 63.0 58.8 None 75.0 65.0 None CHAN10199 A3 CH046A 0 0 1 IRREGULAR 0.018 Earthen 26.8 27.0 None 0 41.9 42.2 None 62.2 58.6 None 73.7 64.9 None CHAN10200 A3 CH046A 0 0 1 IRREGULAR 0.018 Earthen 26.3 26.4 None 0 41.2 41.3 None 61.6 58.5 None 72.4 64.6 None CHAN10201 A3 CH046A 0 0 1 IRREGULAR 0.113 Earthen 26.1 26.3 None 0 40.8 40.9 None 60.6 58.1 None 70.5 64.2 None CHAN10202 A3 CH045A 0 0 1 IRREGULAR 0.021 Concrete 38.8 36.4 None 0 71.1 50.9 None 108.1 62.7 None 121.7 67.4 None CHAN10203 A3 CH045A 0 0 1 IRREGULAR 0.007 Concrete 38.3 36.0 None 0 70.4 50.6 None 106.7 61.8 None 120.8 65.8 None CHAN10204 A3 CH045A 0 0 1 IRREGULAR 0.021 Concrete 38.2 35.9 None 0 70.2 50.4 None 106.4 61.5 None 120.6 66.3 None DTCH10254 A3 ZDD10003 0 0 1 IRREGULAR 0.400 Concrete 22.2 17.5 None 0 45.5 33.7 None 68.7 49.8 None 79.7 55.9 None DTCH10255 A3 ZDD10003 0 0 1 IRREGULAR 0.518 Concrete 22.2 17.5 None 0 45.5 33.7 None 68.7 49.8 None 79.7 55.9 None CHAN10205 A3 CH029-2 0 0 1 IRREGULAR 0.035 Concrete 195.9 224.9 None 0 331.5 360.2 None 481.3 484.8 None 522.5 508.2 Upstream CHAN10209 A3 CH029-2 0 0 1 IRREGULAR 0.035 Concrete 189.9 216.5 None 0 334.6 357.4 Downstream 378.1 417.5 Downstream 287.5 390.5 Downstream DTCH10256 A3 DD047D 0 0 1 IRREGULAR 0.074 Earthen 38.3 32.5 None 0 79.8 59.0 None 112.2 92.3 None 128.0 104.3 None DTCH10258 A3 DD047D 0 0 1 IRREGULAR 0.074 Earthen 37.4 31.6 None 0 78.6 57.7 None 112.2 85.3 None 127.9 89.7 None CHAN10211 A3 CH10142A 0 0 1 IRREGULAR 0.034 Earthen 193.2 219.7 None 0 327.5 358.2 Downstream 353.5 429.6 Downstream 266.2 387.1 Downstream CHAN10227 A3 CH046B 0 0 1 IRREGULAR 0.060 Earthen 27.3 27.2 None 0 48.3 48.3 None 77.0 76.2 None 89.0 87.5 None CHAN10228 A3 CH046B 0 0 1 IRREGULAR 0.020 Earthen 25.6 25.6 None 0 46.5 46.5 None 75.1 75.0 None 86.6 86.1 None CHAN10229 A3 CH046B 0 0 1 IRREGULAR 0.020 Earthen 25.1 25.1 None 0 43.6 43.6 None 70.1 70.2 None 83.2 83.2 None CHAN10230 A3 CH046B 0 0 1 IRREGULAR 0.060 Earthen 24.1 24.0 None 0 38.3 38.3 None 59.5 59.5 None 70.9 71.1 None CHAN10231 A3 CH046C 0 0 1 IRREGULAR 0.035 Earthen 26.6 26.7 None 0 41.8 42.0 None 63.9 64.7 None 77.1 80.0 None CHAN10232 A3 CH046C 0 0 1 IRREGULAR 0.035 Earthen 26.5 26.7 None 0 41.7 42.1 None 63.4 63.1 None 75.4 84.7 None CHAN10233 A3 CH044 0 0 1 IRREGULAR 0.024 Earthen 111.0 109.7 None 0 216.9 196.7 None 325.3 284.6 None 373.1 319.6 None CHAN10238 A3 CH044 0 0 1 IRREGULAR 0.007 Earthen 108.7 106.0 None 0 205.1 185.8 None 309.6 262.8 None 349.4 295.9 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 42 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
CHAN10239 A3 CH044 0 0 1 IRREGULAR 0.007 Earthen 109.4 107.8 None 0 203.4 182.6 None 281.4 230.4 None 312.7 253.7 None CHAN10241 A3 CH044 0 0 1 IRREGULAR 0.024 Earthen 94.8 85.0 None 0 156.6 123.5 Downstream 202.1 151.2 Downstream 218.4 161.9 Downstream CHAN10242 A3 CH045B 0 0 1 IRREGULAR 0.006 Earthen 19.3 15.1 None 0 37.6 24.8 None 53.3 28.4 None 67.1 27.2 None CHAN10243 A3 CH045B 0 0 1 IRREGULAR 0.002 Earthen 16.2 12.9 None 0 30.1 19.0 None 41.3 20.2 None 46.6 18.7 None CHAN10244 A3 CH045B 0 0 1 IRREGULAR 0.002 Earthen 11.4 9.4 None 0 19.9 13.2 None 27.0 15.7 None 30.5 21.8 None CHAN10245 A3 CH045B 0 0 1 IRREGULAR 0.006 Earthen 10.6 9.2 None 0 19.3 15.0 None 26.1 26.0 None 29.7 30.7 None DTCH10259 A3 DD051 0 0 1 IRREGULAR 0.040 Concrete 2.7 2.7 None 0 4.3 4.4 None 6.5 6.6 None 7.4 7.5 None DTCH10260 A3 DD051 0 0 1 IRREGULAR 0.040 Concrete 2.7 2.7 None 0 4.3 4.4 None 6.6 6.4 None 7.5 7.3 None DTCH10261 A3 0 0 1 IRREGULAR 0.004 Concrete 16.3 16.5 None 0 27.7 27.7 None 42.1 41.0 None 48.2 46.7 None DTCH10262 A3 0 0 1 IRREGULAR 0.004 Concrete 16.2 16.4 None 0 27.5 27.7 None 41.9 41.0 None 48.0 46.7 None CHAN10246 A3 0 0 1 IRREGULAR 0.069 Concrete 11.8 11.7 None 0 20.8 20.7 None 31.4 31.0 None 35.8 35.4 None CHAN10247 A3 0 0 1 IRREGULAR 0.030 Concrete 11.3 11.3 None 0 20.8 20.8 None 31.3 31.1 None 35.9 35.6 None CHAN10248 A3 0 0 1 IRREGULAR 0.030 Concrete 10.0 10.0 None 0 18.8 18.8 None 27.9 27.7 None 31.6 31.4 None CHAN10249 A3 0 0 1 IRREGULAR 0.030 Concrete 9.7 9.7 None 0 17.0 17.1 None 26.5 26.6 None 30.3 30.3 None CHAN10250 A3 0 0 1 IRREGULAR 0.030 Concrete 9.3 9.3 None 0 16.5 16.5 None 26.0 26.1 None 30.0 30.1 None CHAN10251 A3 0 0 1 IRREGULAR 0.069 Concrete 8.9 8.9 None 0 16.0 15.8 None 25.1 24.5 None 28.9 28.4 None CHAN10252 A3 ZCH10143B 0 0 1 IRREGULAR 0.043 Concrete 112.2 101.2 None 0 184.1 146.4 None 236.9 193.3 None 256.3 215.9 None CHAN10253 A3 ZCH10143B 0 0 1 IRREGULAR 0.013 Concrete 112.3 100.9 None 0 187.2 146.5 None 237.1 189.0 None 256.6 213.1 None CHAN10254 A3 ZCH10143B 0 0 1 IRREGULAR 0.013 Concrete 112.1 100.8 None 0 178.9 146.1 None 240.9 179.0 None 256.2 197.2 None CHAN10255 A3 ZCH10143B 0 0 1 IRREGULAR 0.007 Concrete 118.8 105.8 None 0 182.5 145.8 None 266.6 179.4 None 256.1 198.5 None CHAN10256 A3 ZCH10042 0 0 1 IRREGULAR 0.032 Concrete 60.4 60.4 None 0 100.0 100.1 None 149.0 149.1 None 171.1 171.2 None CHAN10257 A3 ZCH10042 0 0 1 IRREGULAR 0.007 Concrete 58.6 58.8 None 0 98.1 98.2 None 147.6 147.7 None 169.8 174.5 None CHAN10259 A3 ZCH10042 0 0 1 IRREGULAR 0.018 Concrete 56.4 56.6 None 0 91.4 93.5 None 134.5 111.5 Downstream 151.9 111.1 Downstream CHAN10260 A3 ZCH10073 0 0 1 IRREGULAR 0.013 CONCRETE 1.9 0.0 None 0 2.8 2.4 None 7.0 4.3 None 4.2 4.3 None CHAN10261 A3 ZCH10073 0 0 1 IRREGULAR 0.014 CONCRETE 5.3 3.8 None 0 8.5 7.3 None 13.0 13.2 None 12.5 13.3 None DTCH10263 A3 DD051 0 0 1 IRREGULAR 0.065 Concrete 18.9 19.0 None 0 31.7 31.7 None 47.9 47.3 None 54.8 53.8 None DTCH10264 A3 DD051 0 0 1 IRREGULAR 0.015 Concrete 18.2 18.3 None 0 30.7 30.8 None 47.0 46.7 None 53.8 53.2 None DTCH10265 A3 DD051 0 0 1 IRREGULAR 0.015 Concrete 17.2 17.6 None 0 30.8 30.8 None 46.0 45.9 None 53.1 52.7 None DTCH10266 A3 DD051 0 0 1 IRREGULAR 0.015 Concrete 16.7 17.2 None 0 30.2 30.2 None 45.4 45.3 None 52.2 51.9 None DTCH10267 A3 DD051 0 0 1 IRREGULAR 0.015 Concrete 15.8 16.3 None 0 29.4 31.9 None 41.3 45.1 None 49.2 51.6 None DTCH10268 A3 DD051 0 0 1 IRREGULAR 0.015 Concrete 14.4 15.0 None 0 33.0 29.6 None 49.5 44.0 None 54.8 50.5 None DTCH10269 A3 DD051 0 0 1 IRREGULAR 0.065 Concrete 18.4 14.5 None 0 103.9 26.9 None 89.8 40.5 Downstream 80.3 47.3 Downstream CHAN10291 A3 ZCH10110 0 0 1 IRREGULAR 0.020 Concrete 7.2 8.0 None 0 10.8 12.7 None 11.9 18.0 Upstream 13.8 20.7 Upstream CHAN10292 A3 ZCH10110 0 0 1 IRREGULAR 0.009 Concrete 6.9 7.9 None 0 10.2 12.6 None 10.9 17.6 Downstream 11.5 20.2 Downstream CHAN10293 A3 ZCH10044 0 0 1 IRREGULAR 0.021 Concrete 85.1 53.1 None 0 139.4 64.6 None 202.0 80.8 None 233.1 88.0 Upstream CHAN10294 A3 ZCH10044 0 0 1 IRREGULAR 0.013 Concrete 85.1 54.2 None 0 139.3 64.7 None 200.9 81.1 Downstream 231.4 88.8 Downstream PIPE12258 A3 ZPIP10891 1.5 0 1 CIRCULAR 0.010 RCP 0.0 0.0 None 0 0.0 0.0 None 0.3 0.0 None 1.8 0.0 None PIPE12259 A3 ZPIP10892 1.5 0 1 CIRCULAR 0.106 RCP 0.0 0.0 None 0 0.0 0.0 None 0.7 0.0 None 3.5 0.1 None PIPE12296 A3 ZPIP15929 1.5 0 1 CIRCULAR 0.007 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE12297 A3 ZPIP15930 1.5 0 1 CIRCULAR 0.065 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE12298 A3 ZPIP16459 0 0 1 DUMMY 0.086 PVC 7.1 9.1 Downstream 0 29.7 14.5 Downstream 55.6 21.2 Downstream 30.4 25.0 Downstream PIPE12299 A3 ZPIP16529 1.5 0 1 CIRCULAR 0.009 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 0.0 None PIPE12300 A3 ZPIP16458 0 0 1 DUMMY 0.124 RCP 73.3 51.3 Downstream 0 110.4 61.1 Downstream 249.7 73.4 Downstream 242.4 78.6 Downstream CHAN10301 A3 CH063B 0 0 1 IRREGULAR 0.017 Earthen 17.0 3.7 None 0 30.1 8.0 None 68.6 12.8 None 70.3 14.9 None CHAN10302 A3 CH063C 0 0 1 IRREGULAR 0.012 Earthen 71.1 2.1 None 0 93.4 10.1 None 221.8 37.7 Downstream 228.2 25.2 Downstream PIPE12312 A3 ZPIP17215 1.5 0 1 CIRCULAR 0.053 RCP 0.1 0.0 None 0 0.1 0.0 None 0.8 0.1 None 107.1 0.1 None PIPE12314 A3 ZPIP16491 0 0 1 DUMMY 0.051 RCP 7.0 1.9 None 0 5.3 3.1 None 4.9 4.6 None 4.6 5.2 None FLOW10022 A3 0 0 1 IRREGULAR 0.041 Road 30.9 30.1 None 0 52.9 48.6 None 81.6 65.3 Downstream 94.2 69.1 Downstream PIPE14835 A3 3 0 1 CIRCULAR 0.003 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 3.0 3.1 None FLOW10093 A3 10 30 1 RECT_OPEN 0.061 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 94.8 Downstream 99.4 94.6 Downstream CULV10261 A3 5 6 3 RECT_CLOSED 0.010 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 2.9 3.0 None DTCH10500 A3 0 0 1 IRREGULAR 0.002 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 3.2 3.3 None CULV10182 A4 ZPIP16649 1.5 0 1 CIRCULAR 0.010 RCP 167.7 200.0 Upstream 19.39 247.4 332.0 Upstream 264.9 643.3 Upstream 271.7 486.7 Upstream PIPE13592 A4 3 0 1 CIRCULAR 0.000 RCP 33.1 42.8 None 7.01 53.3 64.7 None 81.8 71.9 Both Upstream and Downstream 90.8 74.5 Both Upstream and Downstream PIPE12883 A4 ZPIP13819 1.5 0 1 CIRCULAR 0.012 CMP 20.7 24.8 Upstream 3.97 38.1 41.3 Upstream 58.3 58.6 Upstream 67.9 65.7 Upstream PIPE13590 A4 3 0 1 CIRCULAR 0.000 RCP 38.5 48.8 None 5.61 60.7 65.7 Upstream 85.5 65.5 Both Upstream and Downstream 97.6 66.3 Both Upstream and Downstream PIPE13322 A4 ZPIP15792 1.5 0 1 CIRCULAR 0.002 HDPE 23.6 17.9 None 3.52 39.3 24.4 None 57.8 29.8 None 65.8 31.8 None PIPE13577 A4 ZPIP17871 1.5 0 1 CIRCULAR 0.005 RCP 18.3 16.4 Upstream 2.21 31.5 26.8 Both Upstream and Downstream 47.7 38.9 Both Upstream and Downstream 54.4 43.8 Both Upstream and Downstream PIPE12780 A4 ZPIP10580 2 0 1 CIRCULAR 0.004 ACP 34.8 34.8 None 2.6 57.6 50.8 Upstream 86.9 69.4 Upstream 99.1 77.4 Upstream PIPE13578 A4 ZPIP17872 1.5 0 1 CIRCULAR 0.005 RCP 18.3 17.8 None 2.39 31.5 24.4 Both Upstream and Downstream 47.6 34.0 Both Upstream and Downstream 54.3 37.9 Both Upstream and Downstream PIPE12412 A4 ZPIP10143 5 0 1 CIRCULAR 0.003 RCP 257.8 326.2 None 2.41 523.5 453.5 None 633.4 615.9 None 730.8 655.4 None CULV10239 A4 4 0 1 CIRCULAR 0.006 RCP 328.0 225.9 None 1.96 583.4 278.7 Upstream 728.8 554.5 Both Upstream and Downstream 1749.2 557.6 Both Upstream and Downstream PIPE13576 A4 ZPIP16576 1.5 0 1 CIRCULAR 0.005 RCP 19.2 19.0 None 2.55 33.0 23.9 Both Upstream and Downstream 49.8 32.0 Both Upstream and Downstream 56.9 35.4 Both Upstream and Downstream PIPE13588 A4 3 0 1 CIRCULAR 0.000 RCP 35.3 41.0 None 3.48 54.5 50.6 Both Upstream and Downstream 74.1 52.6 Both Upstream and Downstream 82.5 55.2 Both Upstream and Downstream CULV10179 A4 ZPIP10395 2.5 0 1 CIRCULAR 0.014 RCP 244.8 124.4 None 2.56 254.0 171.2 None 278.1 211.2 Upstream 257.9 221.6 Upstream CULV10216 A4 CUL086B 2 0 1 CIRCULAR 0.013 RCP 42.2 44.5 None 1.73 62.6 69.4 Both Upstream and Downstream 101.9 99.0 Both Upstream and Downstream 131.0 111.5 Both Upstream and Downstream CULV10213 A4 ZCUL038C 5 0 1 CIRCULAR 0.007 CMP 218.8 213.0 Both Upstream and Downstream 1.8 358.3 348.2 Both Upstream and Downstream 523.9 445.0 Both Upstream and Downstream 585.5 487.8 Both Upstream and Downstream PIPE13596 A4 3.5 0 1 CIRCULAR 0.015 RCP 196.5 198.7 None 1.59 320.9 318.9 None 472.4 432.5 Upstream 533.2 478.3 Both Upstream and Downstream PIPE12866 A4 ZPIP13791 1.5 0 1 CIRCULAR 0.048 RCP 27.6 29.0 None 1.26 56.2 50.1 Upstream 93.4 75.9 Upstream 109.5 85.1 Both Upstream and Downstream CULV10214 A4 ZCUL038D 5 0 1 CIRCULAR 0.009 CMP 216.4 211.2 Both Upstream and Downstream 1.56 354.4 345.3 Both Upstream and Downstream 517.5 440.1 Both Upstream and Downstream 577.8 482.8 Both Upstream and Downstream PIPE12910 A4 ZPIP13874 1.5 0 1 CIRCULAR 0.015 CMP 20.5 15.7 Upstream 2.24 35.5 20.3 Upstream 53.7 23.6 Upstream 61.3 25.0 Upstream PIPE12724 A4 ZPIP13297 4.5 0 1 CIRCULAR 0.003 RCP 150.6 186.1 None 1.8 268.8 265.1 None 408.7 351.8 Upstream 468.1 367.0 Upstream PIPE13591 A4 3 0 1 CIRCULAR 0.001 RCP 36.3 52.4 None 2.6 57.1 67.1 None 81.4 71.0 Both Upstream and Downstream 92.5 69.9 Both Upstream and Downstream PIPE13589 A4 3 0 1 CIRCULAR 0.001 RCP 37.2 52.9 None 2.97 58.1 57.5 Both Upstream and Downstream 80.4 58.7 Both Upstream and Downstream 91.2 60.9 Both Upstream and Downstream PIPE13333 A4 ZPIP15911 2 0 1 CIRCULAR 0.004 RCP 17.4 17.4 None 1.22 32.2 32.1 None 49.5 41.2 Both Upstream and Downstream 56.8 46.0 Both Upstream and Downstream CULV10240 A4 5.5 0 1 CIRCULAR 0.006 CMP 368.4 252.7 Upstream 1.74 645.4 324.3 Upstream 803.5 441.2 Upstream 962.0 470.6 Upstream

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 43 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
CULV10219 A4 ZCUL15980A 8 3 3 RECT_CLOSED 0.013 Earthen 315.8 282.3 Upstream 1.67 486.1 391.2 Upstream 605.5 499.7 Upstream 674.4 539.5 Upstream PIPE13550 A4 ZPIP10536 1.5 0 1 CIRCULAR 0.056 RCP 0.0 0.0 None 0 12.8 66.5 None 7.1 78.9 Both Upstream and Downstream 2.4 77.0 Both Upstream and Downstream DTCH10281 A4 1.5 3 1 PARABOLIC 0.005 Concrete 21.4 12.1 None 0.89 29.8 24.4 Upstream 39.7 35.7 Upstream 45.8 41.7 Both Upstream and Downstream PIPE12606 A4 ZPIP16872 1.5 0 1 CIRCULAR 0.018 RCP 14.2 14.1 None 0.99 27.4 27.3 None 41.2 39.5 Upstream 47.6 43.1 Both Upstream and Downstream PIPE13442 A4 ZPIP16557 3.5 0 1 CIRCULAR 0.026 RCP 202.6 212.4 None 1.31 331.6 328.3 None 488.6 441.5 None 541.7 487.0 Upstream PIPE12564 A4 ZPIP13048 2.5 0 1 CIRCULAR 0.001 CIPCP 17.8 15.4 None 1.13 28.0 25.4 None 40.8 36.6 None 46.7 40.1 None CULV10221 A4 CUL042C 3 2 3 RECT_CLOSED 0.016 RCP 314.3 284.0 Both Upstream and Downstream 1.55 466.3 394.4 Both Upstream and Downstream 572.6 502.5 Both Upstream and Downstream 624.5 541.5 Both Upstream and Downstream CULV10242 A4 CUL042B 3 2 3 RECT_CLOSED 0.016 RCP 314.8 284.4 Downstream 1.55 467.0 395.1 Both Upstream and Downstream 573.5 503.1 Both Upstream and Downstream 625.4 542.2 Both Upstream and Downstream PIPE13089 A4 ZPIP11514 5.5 0 1 CIRCULAR 0.003 RCP 198.4 199.6 None 1.15 321.5 323.2 None 477.4 435.3 None 533.8 508.1 None PIPE12885 A4 ZPIP10802 2.5 0 1 CIRCULAR 0.003 RCP 27.1 27.2 None 1.13 49.3 49.6 None 75.6 63.0 Both Upstream and Downstream 86.7 70.3 Both Upstream and Downstream PIPE12379 A4 ZPIP12518 2 0 1 CIRCULAR 0.068 RCP 68.4 66.7 None 1.13 126.3 122.2 Upstream 194.1 160.5 Upstream 222.4 171.8 Upstream CULV10220 A4 CUL042A 3 2 3 RECT_CLOSED 0.016 RCP 314.3 284.0 Upstream 1.52 466.2 394.4 Both Upstream and Downstream 572.6 502.5 Both Upstream and Downstream 624.5 541.5 Both Upstream and Downstream PIPE12431 A4 ZPIP12593 1.5 0 1 CIRCULAR 0.027 RCP 14.8 14.8 None 0.86 26.1 25.0 None 39.6 43.1 None 45.2 49.1 Upstream CULV10180 A4 ZPIP13057 5 0 1 CIRCULAR 0.009 RCP 302.1 312.0 None 1.29 435.3 511.2 Upstream 485.8 651.4 Both Upstream and Downstream 447.5 686.5 Both Upstream and Downstream PIPE13454 A4 ZPIP12257 2 0 1 CIRCULAR 0.001 RCP 11.0 10.8 None 1.24 18.1 21.0 None 27.4 23.5 Upstream 31.4 24.9 Upstream PIPE12343 A4 ZPIP12480 3 0 1 CIRCULAR 0.005 RCP 39.3 39.2 None 0.83 76.4 75.7 None 118.4 115.9 None 136.2 131.5 None PIPE12565 A4 ZPIP10391 2.5 0 1 CIRCULAR 0.001 CIPCP 13.3 13.5 None 1 21.5 23.6 None 31.6 34.5 None 35.6 37.7 None CULV10235 A4 CUL16839 1 0 2 CIRCULAR 0.014 CMP 17.4 8.1 None 1.75 27.5 9.8 None 37.8 11.8 None 42.7 12.7 Upstream CULV10217 A4 CUL086C 3 0 1 CIRCULAR 0.006 RCP 49.7 54.9 None 1.1 76.9 85.0 Upstream 125.7 120.6 Upstream 161.8 135.6 Upstream PIPE13219 A4 ZPIP15597 1.5 0 1 CIRCULAR 0.010 RCP 9.4 9.4 None 0.9 15.2 15.2 None 22.6 26.4 None 25.6 27.9 Upstream PIPE12456 A4 ZPIP10288 1.5 0 1 CIRCULAR 0.005 RCP 8.0 7.6 None 1.05 14.1 13.1 None 21.5 16.8 Upstream 24.5 18.6 Upstream PIPE12557 A4 ZPIP10389 2.5 0 1 CIRCULAR 0.019 RCP 50.4 50.3 None 0.88 85.5 85.2 None 129.7 134.5 Upstream 147.8 145.2 Upstream PIPE12888 A4 ZPIP13826 1.5 0 1 CIRCULAR 0.101 CMP 0.0 16.1 Both Upstream and Downstream 0.89 0.0 27.8 Both Upstream and Downstream 0.1 40.4 Both Upstream and Downstream 0.1 45.8 Both Upstream and Downstream PIPE13440 A4 ZPIP12242 4 0 1 CIRCULAR 0.012 RCP 151.0 150.8 None 0.95 242.4 241.8 Upstream 352.7 348.8 Both Upstream and Downstream 402.7 398.6 Both Upstream and Downstream PIPE13439 A4 ZPIP12241 4 0 1 CIRCULAR 0.012 RCP 151.4 151.3 None 0.96 242.9 242.6 None 353.4 346.3 Both Upstream and Downstream 403.4 397.5 Both Upstream and Downstream PIPE13000 A4 ZPIP11278 3 0 1 CIRCULAR 0.014 RCP 82.6 82.5 None 1.03 165.0 158.6 None 257.7 193.3 Both Upstream and Downstream 297.1 196.7 Both Upstream and Downstream PIPE12322 A4 ZPIP12332 3 0 1 CIRCULAR 0.008 RCP 40.0 40.3 None 0.67 79.5 94.1 None 124.4 131.5 None 143.8 146.0 None PIPE13468 A4 PIP16670 3.5 0 1 CIRCULAR 0.001 CMP 16.2 13.8 None 0.77 31.6 33.0 None 44.9 41.6 None 52.9 43.7 Upstream PIPE13107 A4 ZPIP17401 2 0 1 CIRCULAR 0.010 RCP 25.6 26.9 None 1.18 43.5 38.1 None 69.7 51.2 None 81.2 54.7 None PIPE12998 A4 ZPIP17242 1.5 0 1 CIRCULAR 0.018 RCP 4.6 4.6 None 0.32 8.4 8.7 None 13.0 31.8 Both Upstream and Downstream 14.9 33.7 Both Upstream and Downstream CULV10215 A4 CUL086A 3 0 1 CIRCULAR 0.005 RCP 40.4 44.5 None 0.97 62.6 69.0 Both Upstream and Downstream 101.9 98.0 Both Upstream and Downstream 131.0 110.1 Both Upstream and Downstream PIPE13586 A4 2.5 0 1 CIRCULAR 0.001 RCP 15.5 21.3 None 1.79 27.9 27.1 Downstream 43.5 28.4 Both Upstream and Downstream 50.4 28.3 Both Upstream and Downstream CULV10243 A4 ZPIP16685 6 6 3 RECT_CLOSED 0.001 RCP 658.9 633.7 Upstream 1.19 955.5 940.1 Upstream 1288.8 1218.2 Upstream 1377.1 1266.7 Upstream PIPE13076 A4 ZPIP15175 1.5 0 1 CIRCULAR 0.005 RCP 1.7 1.7 None 0.22 2.6 2.6 None 3.8 3.8 None 4.3 18.0 None PIPE13147 A4 ZPIP11595 2 0 1 CIRCULAR 0.014 RCP 25.7 25.7 None 0.95 41.0 40.0 Upstream 66.0 56.8 Upstream 77.2 63.9 Upstream PIPE13368 A4 ZPIP15984 2.5 0 1 CIRCULAR 0.013 RCP 50.9 51.0 None 1.08 82.4 80.1 None 121.9 105.5 None 147.1 109.1 None CULV10227 A4 ZPIP17660 2.5 0 1 CIRCULAR 0.016 RCP 22.6 22.7 None 0.44 42.8 42.7 None 66.8 110.2 Upstream 76.7 117.9 Upstream PIPE13564 A4 5.5 0 1 CIRCULAR 0.005 CIPCP 138.6 139.2 None 0.65 269.1 287.9 None 404.4 433.4 None 470.9 486.4 None PIPE12907 A4 ZPIP13853 1.5 0 1 CIRCULAR 0.010 RCP 10.8 10.7 None 1 18.8 19.6 None 28.4 23.1 Both Upstream and Downstream 32.4 24.3 Both Upstream and Downstream PIPE13218 A4 ZPIP15596 2 0 1 CIRCULAR 0.003 RCP 10.3 10.3 None 0.84 16.5 16.5 None 24.4 24.4 None 27.6 27.6 None PIPE13567 A4 1.5 0 1 CIRCULAR 0.005 RCP 5.2 5.2 None 0.69 8.2 8.1 None 11.9 12.1 None 13.5 16.5 None PIPE12997 A4 ZPIP17241 1.5 0 1 CIRCULAR 0.011 RCP 0.0 0.0 None 0 0.1 0.1 None 0.1 16.1 Both Upstream and Downstream 0.1 24.0 Both Upstream and Downstream PIPE12408 A4 ZPIP12554 3 0 1 CIRCULAR 0.040 RCP 151.5 148.5 None 1.12 301.7 233.0 Upstream 475.3 274.1 Upstream 548.3 288.5 Upstream CULV10183 A4 ZCUL038A 5 0 1 CIRCULAR 0.025 CMP 251.6 212.6 Upstream 0.95 380.3 345.4 Upstream 523.6 444.0 Upstream 585.2 486.3 Upstream PIPE13237 A4 ZPIP11757 1.5 0 1 CIRCULAR 0.009 RCP 0.8 0.8 None 0.07 1.4 1.4 None 2.1 24.9 Both Upstream and Downstream 2.4 21.4 Both Upstream and Downstream PIPE13241 A4 ZPIP15651 2.5 0 1 CIRCULAR 0.009 RCP 13.4 13.4 None 0.35 34.3 34.0 None 56.4 77.1 None 65.9 79.9 Downstream PIPE13065 A4 ZPIP11505 2.5 0 1 CIRCULAR 0.019 RCP 44.9 45.0 None 0.79 72.1 72.4 None 106.9 104.0 None 121.3 117.2 None PIPE13574 A4 ZPIP17659 3.5 0 1 CIRCULAR 0.011 RCP 52.6 52.7 None 0.5 95.5 95.6 None 153.2 202.2 None 176.8 215.1 None PIPE12911 A4 ZPIP13875 2 0 1 CIRCULAR 0.011 CMP 20.5 22.6 Downstream 1.74 35.5 21.8 Both Upstream and Downstream 53.6 24.7 Both Upstream and Downstream 61.2 26.2 Both Upstream and Downstream PIPE12950 A4 ZPIP11055 2 0 1 CIRCULAR 0.094 RCP 55.2 55.2 None 0.8 87.4 87.3 None 128.0 124.3 Upstream 144.3 139.5 Upstream PIPE13556 A4 ZPIP13817 3 0 1 CIRCULAR 0.012 RCP 50.2 50.0 None 0.67 97.7 99.8 None 156.2 143.0 None 181.9 149.2 None PIPE12390 A4 ZPIP10130 1.5 0 1 CIRCULAR 0.013 RCP 8.0 8.0 None 0.68 13.2 13.0 None 19.5 21.0 None 22.1 23.5 None PIPE12433 A4 ZPIP10157 1.5 0 1 CIRCULAR 0.021 RCP 11.7 11.6 None 0.76 19.9 20.9 None 30.1 27.4 Upstream 34.3 30.8 Upstream PIPE12490 A4 ZPIP12894 2 0 1 CIRCULAR 0.010 RCP 7.0 7.0 None 0.32 16.0 16.0 None 25.7 45.0 Upstream 29.9 44.3 Both Upstream and Downstream PIPE12524 A4 ZPIP10358 6 0 1 CIRCULAR 0.005 RCP 170.9 170.0 None 0.57 321.7 322.0 None 494.5 512.9 None 566.9 596.4 None CULV10212 A4 ZCUL14928 6 12 1 RECT_CLOSED 0.002 RCP 422.5 432.0 None 0.74 706.5 700.4 None 1141.3 1038.3 None 1143.7 1157.9 None PIPE12545 A4 ZPIP13015 6 0 1 CIRCULAR 0.005 RCP 172.4 171.5 None 0.57 324.1 336.3 None 498.0 530.1 None 570.9 592.2 None CULV10228 A4 CUL16833 1 0 2 CIRCULAR 0.014 HDPE 23.0 7.9 None 0.93 34.1 9.0 None 46.2 16.8 None 51.3 16.8 None PIPE12777 A4 ZPIP13403 3.5 0 1 CIRCULAR 0.016 RCP 77.2 77.1 None 0.61 142.5 153.4 None 216.8 239.2 None 249.0 246.9 None PIPE13478 A4 PIP20021B 1.5 0 1 CIRCULAR 0.004 RCP 1.4 9.4 None 1.37 2.2 11.2 Both Upstream and Downstream 3.2 9.9 Both Upstream and Downstream 3.6 13.5 Both Upstream and Downstream PIPE12523 A4 ZPIP16810 6 0 1 CIRCULAR 0.005 RCP 170.3 169.6 None 0.57 320.9 317.1 None 493.3 504.0 None 565.5 584.6 None PIPE13455 A4 ZPIP16584 2 0 3 CIRCULAR 0.006 RCP 54.7 53.4 None 1.03 90.0 78.2 None 135.7 101.3 None 154.8 101.6 None PIPE13618 A4 ZPIP11903 1.5 0 1 CIRCULAR 0.004 RCP 5.5 5.5 None 0.78 9.0 8.7 None 13.6 14.3 None 15.4 13.7 None PIPE12838 A4 ZPIP13613 1.5 0 1 CIRCULAR 0.019 RCP 18.9 16.9 None 1.16 32.6 20.9 Upstream 49.4 26.0 Upstream 56.4 28.4 Upstream PIPE13009 A4 ZPIP11282 5 0 1 CIRCULAR 0.006 RCP 97.4 97.6 None 0.5 193.7 204.8 None 309.7 314.4 None 359.6 373.5 None PIPE12345 A4 ZPIP12485 2 0 1 CIRCULAR 0.013 RCP 12.9 12.9 None 0.5 27.4 27.3 None 43.2 43.1 None 49.9 49.8 None PIPE13377 A4 ZPIP16002 2.5 0 1 CIRCULAR 0.030 HDPE 42.4 42.4 None 0.6 76.3 76.2 None 117.6 117.4 None 134.5 134.4 None PIPE13179 A4 ZPIP11681 1.5 0 1 CIRCULAR 0.002 RCP 2.8 2.8 None 0.65 4.5 4.5 None 6.7 6.3 None 7.6 8.2 None PIPE12440 A4 ZPIP12601 4 0 1 CIRCULAR 0.012 RCP 101.5 101.5 None 0.63 170.9 170.2 None 254.4 250.6 None 287.2 296.7 None CULV10231 A4 CUL16835 1 0 2 CIRCULAR 0.014 CMP 21.1 7.4 None 1.6 32.2 7.9 None 44.6 8.4 None 49.6 8.6 None PIPE12790 A4 ZPIP16946 3.5 0 1 CIRCULAR 0.006 RCP 56.5 55.2 None 0.71 94.8 89.1 None 143.6 135.1 None 163.6 143.4 None PIPE13029 A4 ZPIP11389 3 0 1 CIRCULAR 0.009 RCP 29.0 29.0 None 0.46 50.2 50.2 None 77.5 80.9 None 89.1 115.6 Downstream CULV10234 A4 CUL16838 1 0 2 CIRCULAR 0.014 CMP 16.2 6.9 None 1.49 27.3 7.4 None 36.3 8.2 None 40.7 8.5 None PIPE13605 A4 ZPIP12602 4 0 1 CIRCULAR 0.012 RCP 101.7 101.7 None 0.66 171.2 172.2 None 254.6 250.8 None 288.0 285.0 None PIPE12892 A4 ZPIP13833 1.5 0 1 CIRCULAR 0.005 CIPCP 4.2 5.0 None 0.77 6.6 10.9 None 8.1 12.0 Upstream 9.3 12.0 Upstream CULV10233 A4 CUL16837 1 0 2 CIRCULAR 0.014 CMP 17.6 7.3 None 1.58 27.9 7.7 None 39.2 8.1 None 44.0 8.4 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 44 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
CULV10230 A4 CUL16834 1 0 2 CIRCULAR 0.014 CMP 21.5 7.5 None 1.62 32.9 7.8 None 45.3 8.2 None 50.5 8.3 None PIPE12694 A4 ZPIP10499 1.5 0 1 CIRCULAR 0.009 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 18.7 None 0.0 17.8 None PIPE12609 A4 ZPIP16656 1.5 0 1 CIRCULAR 0.009 RCP 0.0 0.0 None 0 0.0 6.5 None 25.8 15.6 Both Upstream and Downstream 16.8 18.1 Both Upstream and Downstream PIPE12625 A4 ZPIP10434 2 0 1 CIRCULAR 0.008 RCP 0.0 0.0 None 0 0.0 0.3 None 0.5 24.0 Both Upstream and Downstream 0.9 35.1 Both Upstream and Downstream PIPE13055 A4 ZPIP11500 1.5 0 1 CIRCULAR 0.014 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 15.4 None 0.1 22.3 Both Upstream and Downstream CULV10229 A4 CUL16851 1 0 2 CIRCULAR 0.014 CMP 21.1 7.3 None 1.58 35.3 7.7 None 45.0 8.1 None 50.0 8.2 None PIPE12624 A4 ZPIP16878 1.5 0 1 CIRCULAR 0.026 RCP 6.4 6.4 None 0.38 13.5 13.5 None 21.3 30.4 Upstream 24.7 29.8 Both Upstream and Downstream PIPE13323 A4 ZPIP11829 2.5 0 1 CIRCULAR 0.011 RCP 41.5 29.3 None 0.69 67.0 46.0 None 95.5 67.5 None 108.2 74.1 None PIPE13037 A4 ZPIP17299 2.5 0 1 CIRCULAR 0.011 RCP 41.6 29.3 None 0.69 67.1 45.7 None 95.8 67.3 None 108.6 73.7 None PIPE13600 A4 ZPIP14277 4 0 1 CIRCULAR 0.003 RCP 70.1 69.8 None 0.89 121.3 102.2 None 182.8 128.1 None 208.6 135.2 None PIPE13430 A4 ZPIP12011 1.5 0 1 CIRCULAR 0.005 RCP 0.4 10.6 None 1.48 0.8 12.1 Both Upstream and Downstream 1.5 10.1 Both Upstream and Downstream 1.8 12.2 Both Upstream and Downstream PIPE12970 A4 ZPIP17184 3 0 1 CIRCULAR 0.014 RCP 51.7 51.6 None 0.66 86.8 87.1 Downstream 134.6 126.4 Downstream 153.2 132.6 Downstream PIPE13229 A4 ZPIP15609 2 0 3 CIRCULAR 0.006 RCP 44.9 45.7 None 0.88 73.8 63.9 None 111.6 84.9 None 126.7 88.1 None PIPE13532 A4 ZPIP12907 3.5 0 1 CIRCULAR 0.003 RCP 31.9 32.1 None 0.6 51.7 51.8 None 76.7 76.1 None 87.0 90.3 None PIPE12894 A4 ZPIP13838 1.5 0 1 CIRCULAR 0.008 CIPCP 1.9 1.9 None 0.23 3.2 3.2 None 4.8 11.4 None 5.4 13.9 Downstream PIPE13315 A4 ZPIP17548 2 0 1 CIRCULAR 0.005 HDPE 6.1 6.1 None 0.4 13.3 13.3 None 20.6 20.4 None 24.0 25.5 None PIPE13416 A4 ZPIP11990 2 0 1 CIRCULAR 0.007 CMP 5.6 5.6 None 0.53 10.1 10.0 None 15.4 15.5 None 17.6 17.7 None CULV10232 A4 CUL16836 1 0 2 CIRCULAR 0.014 CMP 18.6 6.9 None 1.5 29.4 7.2 None 41.0 7.5 None 45.5 7.6 None PIPE12994 A4 ZPIP14742 1.5 0 1 CIRCULAR 0.018 RCP 0.1 0.1 None 0.01 0.1 18.2 None 0.2 22.6 Both Upstream and Downstream 0.2 23.1 Both Upstream and Downstream PIPE13341 A4 ZPIP15933 1.5 0 1 CIRCULAR 0.005 RCP 4.1 4.2 None 0.56 6.8 6.7 None 10.4 11.8 None 11.9 12.2 None PIPE13565 A4 5.5 0 1 CIRCULAR 0.006 CIPCP 111.1 111.2 None 0.51 222.3 229.2 None 334.7 344.8 None 389.5 360.3 None PIPE12489 A4 ZPIP12893 2.5 0 1 CIRCULAR 0.018 RCP 30.5 30.5 None 0.55 55.3 54.9 None 85.6 78.5 None 98.1 88.8 None PIPE12921 A4 ZPIP14163 5 0 1 CIRCULAR 0.005 RCP 98.8 95.7 None 0.55 176.8 167.8 None 274.2 240.4 None 311.6 280.1 None PIPE13221 A4 ZPIP17515 2 0 1 CIRCULAR 0.017 RCP 10.9 10.9 None 0.37 17.5 17.6 None 25.5 29.9 None 28.2 46.6 None PIPE12845 A4 ZPIP10696 1.5 0 1 CIRCULAR 0.033 RCP 13.3 13.4 None 0.7 21.4 21.3 None 31.7 29.6 None 36.0 30.3 Upstream PIPE12995 A4 ZPIP14743 1.5 0 1 CIRCULAR 0.014 RCP 0.0 0.1 None 0 0.1 5.8 None 0.2 22.6 Both Upstream and Downstream 0.2 19.8 Both Upstream and Downstream PIPE13201 A4 ZPIP15572 1.5 0 1 CIRCULAR 0.005 RCP 4.7 4.8 None 0.63 7.6 7.6 None 11.3 11.8 None 12.8 12.0 None PIPE13329 A4 ZPIP15889 3 0 1 CIRCULAR 0.003 RCP 14.4 12.1 None 0.31 28.0 30.3 None 42.9 60.7 None 50.7 61.9 Downstream PIPE13571 A4 2 0 1 CIRCULAR 0.005 RCP 8.6 8.7 None 0.54 13.7 13.6 None 20.1 18.6 None 22.7 25.3 None PIPE12488 A4 ZPIP12891 2.5 0 1 CIRCULAR 0.020 RCP 30.6 30.6 None 0.52 55.3 55.2 None 85.5 81.2 Upstream 97.9 92.3 Upstream PIPE12506 A4 ZPIP12911 6 0 1 CIRCULAR 0.005 RCP 135.1 134.9 None 0.45 250.8 247.6 None 384.9 388.0 None 441.3 470.7 Upstream PIPE12521 A4 ZPIP16808 2.5 0 1 CIRCULAR 0.009 RCP 17.7 17.7 None 0.45 28.1 28.1 None 41.1 50.8 None 46.3 62.0 None PIPE13085 A4 ZPIP17372 1.5 0 1 CIRCULAR 0.432 RCP 33.6 33.6 None 0.49 55.1 55.1 None 83.1 87.1 Upstream 94.7 108.6 Upstream PIPE13570 A4 2 0 1 CIRCULAR 0.005 RCP 8.6 8.6 None 0.54 13.6 13.5 None 19.9 18.6 None 22.5 25.2 None PIPE13573 A4 2.5 0 1 CIRCULAR 0.005 RCP 15.6 15.7 None 0.54 24.8 24.6 None 36.3 34.1 None 40.9 45.6 None PIPE12354 A4 ZPIP10109 2.5 0 1 CIRCULAR 0.024 RCP 39.4 39.4 None 0.63 67.6 66.5 None 101.7 92.1 None 115.8 97.9 Upstream PIPE12986 A4 ZPIP14737 3.5 0 1 CIRCULAR 0.020 RCP 101.8 101.3 None 0.72 199.9 191.1 None 310.9 214.3 Upstream 359.5 218.9 Upstream PIPE13427 A4 ZPIP12008 2.5 0 1 CIRCULAR 0.005 RCP 15.5 27.4 None 0.96 25.7 35.4 None 38.6 43.0 Downstream 42.4 43.6 Both Upstream and Downstream PIPE12323 A4 ZPIP10034 3.5 0 1 CIRCULAR 0.008 RCP 42.9 42.9 None 0.47 83.5 81.7 None 128.6 122.5 None 147.9 137.5 None PIPE12439 A4 ZPIP12600 1.5 0 1 CIRCULAR 0.034 RCP 7.9 7.9 None 0.41 15.6 15.5 None 24.5 24.9 None 28.3 29.2 None PIPE13170 A4 ZPIP15488 2 0 1 CIRCULAR 0.023 RCP 18.8 18.8 None 0.55 30.0 30.0 None 44.4 44.8 None 50.3 51.7 None PIPE13443 A4 ZPIP17864 4 0 1 CIRCULAR 0.003 RCP 63.5 63.5 None 0.81 110.3 91.5 None 166.2 113.6 None 189.9 119.7 None PIPE12326 A4 ZPIP12350 3.5 0 1 CIRCULAR 0.008 RCP 42.7 42.7 None 0.47 82.8 82.2 None 128.3 125.6 None 147.6 137.5 None PIPE12368 A4 ZPIP12508 2 0 1 CIRCULAR 0.045 RCP 27.4 27.4 None 0.57 47.3 47.1 None 71.5 68.6 None 81.5 72.9 Both Upstream and Downstream PIPE12380 A4 ZPIP12520 2 0 1 CIRCULAR 0.010 RCP 11.9 11.9 None 0.54 19.4 19.4 None 28.7 29.2 None 32.5 33.7 None PIPE13036 A4 ZPIP11390 1.5 0 1 CIRCULAR 0.004 RCP 3.8 3.8 None 0.57 6.0 6.0 None 8.8 8.8 None 10.1 10.0 None PIPE13316 A4 ZPIP17549 2 0 1 CIRCULAR 0.006 HDPE 6.0 6.0 None 0.36 13.3 13.2 None 20.5 21.3 None 23.9 25.3 None PIPE13585 A4 2.5 0 1 CIRCULAR 0.002 RCP 14.4 17.3 None 1.07 24.4 23.6 None 36.6 23.2 Both Upstream and Downstream 42.4 24.2 Both Upstream and Downstream PIPE12673 A4 ZPIP10491 2 0 1 CIRCULAR 0.016 RCP 15.2 15.2 None 0.53 26.2 26.1 None 39.9 39.1 Downstream 45.6 42.4 Both Upstream and Downstream PIPE12889 A4 ZPIP17045 3.5 0 1 CIRCULAR 0.003 CMP 16.3 13.9 None 0.24 31.8 35.5 None 46.9 89.8 Upstream 54.4 87.2 Both Upstream and Downstream PIPE12897 A4 ZPIP10809 2 0 1 CIRCULAR 0.015 RCP 19.1 19.0 None 0.7 32.0 29.4 None 48.0 40.6 Upstream 54.4 40.9 Upstream PIPE13335 A4 ZPIP15913 2.5 0 1 CIRCULAR 0.063 CMP 35.3 35.5 None 0.64 63.9 63.8 None 98.1 76.9 Upstream 112.4 83.1 Upstream PIPE13539 A4 6 0 1 CIRCULAR 0.018 RCP 216.5 219.9 None 0.39 403.2 402.6 None 619.6 646.3 None 712.7 843.6 None PIPE12400 A4 ZPIP12549 4 0 1 CIRCULAR 0.054 RCP 151.5 152.3 None 0.46 300.6 299.7 None 470.9 458.9 None 539.0 491.9 None PIPE12536 A4 ZPIP10371 2.5 0 1 CIRCULAR 0.010 RCP 19.8 19.9 None 0.48 31.7 31.8 None 47.0 49.4 None 53.2 59.5 None PIPE13088 A4 ZPIP11513 5.5 0 1 CIRCULAR 0.009 RCP 193.7 194.2 None 0.6 313.8 314.1 None 464.8 414.9 None 518.5 471.8 None CULV10222 A4 CUL043 0.833 0 1 CIRCULAR 0.029 CMP 12.0 2.8 None 1.36 17.5 3.0 None 22.7 3.0 None 24.8 3.0 None PIPE12837 A4 ZPIP13605 1.5 0 1 CIRCULAR 0.023 RCP 8.5 8.5 None 0.53 13.7 13.7 None 20.3 19.9 None 23.0 23.0 None CULV10185 A4 ZPIP17044 3 0 2 CIRCULAR 0.003 CMP 14.3 12.0 None 0.29 27.8 30.5 None 41.4 64.5 Downstream 48.7 60.4 Both Upstream and Downstream PIPE13168 A4 ZPIP11676 2 0 1 CIRCULAR 0.015 RCP 14.3 14.3 None 0.52 22.9 22.8 None 33.9 35.5 None 38.3 39.7 None PIPE13249 A4 ZPIP15656 2 0 1 CIRCULAR 0.018 RCP 10.4 10.4 None 0.34 23.0 22.9 None 36.7 37.6 None 42.5 44.2 None PIPE12399 A4 ZPIP12548 4 0 1 CIRCULAR 0.053 RCP 145.9 146.6 None 0.44 289.6 288.3 None 454.0 443.6 Upstream 519.3 474.2 Upstream PIPE12948 A4 ZPIP11053 5 0 1 CIRCULAR 0.002 RCP 70.5 75.5 None 0.58 111.5 114.5 None 163.4 168.1 None 185.4 184.8 None PIPE13423 A4 ZPIP16147 3 0 1 CIRCULAR 0.001 RCP 14.3 28.4 None 1.35 20.9 29.3 Both Upstream and Downstream 30.3 28.8 Both Upstream and Downstream 34.1 29.9 Both Upstream and Downstream PIPE12840 A4 ZPIP16992 1.75 0 1 CIRCULAR 0.017 RCP 20.7 18.2 None 0.87 35.5 22.3 None 53.7 28.1 None 61.3 29.6 None PIPE12848 A4 ZPIP10699 1.5 0 1 CIRCULAR 0.041 RCP 13.3 13.4 None 0.63 21.4 21.3 None 31.7 29.6 None 36.1 30.3 None PIPE13197 A4 ZPIP17507 1.5 0 1 CIRCULAR 0.009 RCP 4.9 4.9 None 0.5 7.7 7.6 None 11.1 11.1 None 12.7 13.9 None PIPE12797 A4 ZPIP13489 2.5 0 1 CIRCULAR 0.068 RCP 63.9 64.2 None 0.6 102.1 102.2 None 151.1 145.8 None 171.1 151.1 None PIPE12938 A4 ZPIP17133 2.5 0 1 CIRCULAR 0.015 RCP 38.1 38.1 None 0.75 63.3 61.6 None 94.9 70.0 Upstream 108.2 71.6 Upstream PIPE12366 A4 ZPIP12506 3 0 1 CIRCULAR 0.016 RCP 43.9 43.8 None 0.53 76.1 74.5 None 114.9 103.2 None 130.7 117.0 None PIPE12653 A4 ZPIP10479 4.5 0 1 CIRCULAR 0.021 RCP 167.2 187.5 None 0.66 296.1 296.1 None 449.8 384.2 None 515.7 399.8 None PIPE12984 A4 ZPIP14735 4 0 1 CIRCULAR 0.012 RCP 103.9 103.4 None 0.65 203.6 203.2 None 326.1 217.2 None 365.8 221.4 None PIPE13196 A4 ZPIP17506 1.5 0 1 CIRCULAR 0.009 RCP 4.9 4.9 None 0.5 7.7 7.6 None 11.2 11.0 None 12.7 13.6 None CULV10186 A4 ZPIP14290 2 5 2 RECT_CLOSED 0.005 RCP 68.6 82.3 None 0.66 111.0 132.0 None 158.1 162.2 None 177.8 174.6 None PIPE13325 A4 ZPIP11831 2 0 1 CIRCULAR 0.011 CMP 21.8 9.3 None 0.73 34.6 11.5 None 46.9 15.2 None 52.1 17.6 None PIPE13616 A4 ZPIP14289 4.5 0 1 CIRCULAR 0.004 RCP 70.4 83.5 None 0.68 114.2 128.3 None 161.5 150.3 None 181.6 171.4 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 45 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE12373 A4 ZPIP12514 3 0 1 CIRCULAR 0.019 RCP 43.7 43.7 None 0.48 75.7 74.4 None 114.1 106.5 None 130.0 127.1 None PIPE13101 A4 ZPIP15236 2.25 0 1 CIRCULAR 0.025 RCP 43.9 43.5 None 0.89 77.2 61.2 Both Upstream and Downstream 116.7 64.6 Both Upstream and Downstream 133.3 67.6 Both Upstream and Downstream PIPE13366 A4 ZPIP15982 2.5 0 1 CIRCULAR 0.023 RCP 42.4 42.4 None 0.68 68.0 66.7 None 100.6 84.0 None 113.9 86.1 Upstream PIPE12553 A4 ZPIP16847 3 0 1 CIRCULAR 0.018 RCP 44.8 44.8 None 0.51 78.3 77.6 None 119.6 108.5 Downstream 136.7 121.1 Downstream PIPE13563 A4 4.5 0 1 CIRCULAR 0.016 CIPCP 101.3 101.7 None 0.47 203.3 205.1 None 307.0 286.9 None 355.2 296.0 Upstream PIPE12520 A4 ZPIP12979 2.5 0 1 CIRCULAR 0.005 RCP 14.1 14.1 None 0.46 22.4 22.3 None 32.6 38.5 None 36.8 41.4 Upstream PIPE12842 A4 ZPIP16994 3 0 1 CIRCULAR 0.009 RCP 32.2 32.2 None 0.52 51.7 51.0 None 76.9 73.5 None 87.1 83.8 None PIPE13158 A4 ZPIP15451 1.5 0 1 CIRCULAR 0.014 RCP 6.2 6.2 None 0.49 10.2 10.1 None 15.1 15.1 None 17.1 17.1 None PIPE12387 A4 ZPIP16717 1.5 0 1 CIRCULAR 0.039 RCP 3.7 3.7 None 0.18 5.8 5.8 None 8.5 17.5 Both Upstream and Downstream 9.6 27.9 Both Upstream and Downstream PIPE12666 A4 ZPIP10488 1.5 0 1 CIRCULAR 0.019 RCP 3.4 3.4 None 0.24 6.2 6.2 None 17.2 15.4 Both Upstream and Downstream 10.7 19.5 Both Upstream and Downstream PIPE12672 A4 ZPIP10490 4 0 1 CIRCULAR 0.022 RCP 113.9 113.1 None 0.54 194.9 189.9 None 295.4 262.6 None 337.4 286.0 None PIPE12940 A4 ZPIP17139 2.25 0 1 CIRCULAR 0.019 RCP 30.2 30.1 None 0.72 55.0 46.0 Both Upstream and Downstream 83.9 52.9 Both Upstream and Downstream 96.1 57.0 Both Upstream and Downstream PIPE13043 A4 ZPIP14972 1.5 0 1 CIRCULAR 0.011 RCP 0.4 0.1 None 0.01 0.7 0.1 None 6.4 8.0 None 7.3 15.1 None PIPE12455 A4 ZPIP10249 2 0 1 CIRCULAR 0.026 RCP 23.2 23.2 None 0.64 38.6 39.7 None 57.5 47.8 Both Upstream and Downstream 65.3 48.6 Both Upstream and Downstream PIPE12815 A4 ZPIP13520 1.5 0 1 CIRCULAR 0.020 RCP 7.6 7.6 None 0.52 12.1 12.1 None 17.8 18.7 None 20.1 19.7 None PIPE12901 A4 ZPIP13842 2.5 0 1 CIRCULAR 0.003 RCP 7.8 7.9 None 0.36 13.3 13.3 None 20.3 26.2 Upstream 23.3 29.5 Both Upstream and Downstream PIPE12946 A4 ZPIP14320 2 0 2 CIRCULAR 0.009 RCP 34.6 32.6 None 0.75 55.2 45.7 None 79.5 55.3 None 89.4 58.3 None PIPE13181 A4 ZPIP11683 1.5 0 1 CIRCULAR 0.013 RCP 5.7 5.7 None 0.47 9.1 9.1 None 13.4 12.9 None 15.1 16.4 None PIPE12370 A4 ZPIP10115 4 0 1 CIRCULAR 0.010 RCP 74.1 73.8 None 0.52 125.1 122.2 None 186.1 175.6 None 210.5 189.9 None PIPE12903 A4 ZPIP13849 1.5 0 1 CIRCULAR 0.015 RCP 12.3 13.4 None 1.05 21.2 17.9 Both Upstream and Downstream 32.0 17.1 Both Upstream and Downstream 36.4 17.0 Both Upstream and Downstream PIPE12969 A4 ZPIP17183 3 0 1 CIRCULAR 0.021 RCP 50.2 50.1 None 0.52 85.2 84.8 None 129.3 123.0 None 147.6 129.3 None PIPE13334 A4 ZPIP15912 2 0 1 CIRCULAR 0.014 RCP 12.9 12.8 None 0.49 23.4 23.5 None 35.7 31.2 Both Upstream and Downstream 40.8 35.0 Both Upstream and Downstream PIPE13385 A4 ZPIP11951 4 0 1 CIRCULAR 0.005 RCP 45.4 50.5 None 0.5 74.2 81.4 None 111.9 121.0 None 127.4 134.2 None PIPE12363 A4 ZPIP10113 4 0 1 CIRCULAR 0.013 RCP 76.9 76.6 None 0.47 129.5 128.5 None 192.4 183.8 None 217.5 213.8 None PIPE12374 A4 ZPIP12515 3 0 1 CIRCULAR 0.018 RCP 44.1 44.0 None 0.49 76.4 74.7 None 115.5 103.6 None 131.4 117.7 None PIPE12385 A4 ZPIP12525 2 0 1 CIRCULAR 0.041 RCP 19.5 19.6 None 0.43 33.3 33.4 None 50.3 55.3 Upstream 57.3 60.3 Both Upstream and Downstream PIPE12628 A4 ZPIP13125 4.5 0 1 CIRCULAR 0.016 RCP 93.5 108.2 None 0.44 192.9 213.4 None 308.4 311.5 Upstream 358.9 323.6 Both Upstream and Downstream PIPE12731 A4 ZPIP13303 4.5 0 1 CIRCULAR 0.024 RCP 167.1 170.3 None 0.56 295.8 293.3 None 449.5 384.2 None 515.3 399.8 None PIPE13230 A4 ZPIP15612 3 0 1 CIRCULAR 0.019 RCP 54.1 65.4 None 0.71 87.5 123.0 None 129.0 123.7 Both Upstream and Downstream 148.4 122.3 Both Upstream and Downstream PIPE12941 A4 ZPIP11049 2.25 0 1 CIRCULAR 0.028 RCP 43.7 43.3 None 0.84 76.9 58.7 Upstream 116.3 64.2 Upstream 132.9 67.4 Upstream PIPE12770 A4 ZPIP13358 4 0 1 CIRCULAR 0.020 RCP 86.3 86.3 None 0.42 158.3 158.0 None 240.5 248.8 None 276.0 263.9 None PIPE12828 A4 ZPIP10655 1.5 0 1 CIRCULAR 0.009 RCP 2.8 2.8 None 0.28 4.4 4.4 None 6.4 6.4 None 7.3 13.2 None PIPE13224 A4 ZPIP15602 4 0 1 CIRCULAR 0.003 RCP 42.8 43.4 None 0.56 71.1 67.2 None 107.6 95.3 None 122.6 100.8 None PIPE12395 A4 ZPIP10133 3 0 1 CIRCULAR 0.030 RCP 35.8 36.1 None 0.31 81.0 81.2 None 132.9 130.7 None 152.4 149.4 None PIPE12712 A4 ZPIP10513 3 0 1 CIRCULAR 0.021 RCP 50.5 50.5 None 0.53 87.2 86.5 None 132.5 123.7 Both Upstream and Downstream 151.3 124.3 Both Upstream and Downstream PIPE12717 A4 ZPIP13291 4.5 0 1 CIRCULAR 0.020 RCP 148.6 149.6 None 0.53 265.7 261.3 None 404.1 346.6 Downstream 462.7 362.8 Both Upstream and Downstream PIPE12779 A4 ZPIP10578 3.5 0 1 CIRCULAR 0.027 RCP 68.6 68.5 None 0.42 129.1 128.7 None 197.3 201.1 None 227.0 211.9 Both Upstream and Downstream PIPE13472 A4 PIP16806 3 0 1 CIRCULAR 0.030 RCP 35.8 36.0 None 0.31 80.9 81.1 None 132.2 130.7 None 151.7 149.1 None CULV10200 A4 ZCUL13921 6 12 1 RECT_CLOSED 0.006 RCP 522.3 538.8 None 0.54 855.2 858.1 None 1221.3 1214.9 None 1215.2 1271.9 None PIPE13160 A4 ZPIP11659 3 0 1 CIRCULAR 0.019 RCP 54.1 65.5 None 0.71 87.5 105.3 None 129.1 114.3 Upstream 148.6 117.8 Upstream PIPE12371 A4 ZPIP10116 4 0 1 CIRCULAR 0.011 RCP 72.9 72.6 None 0.49 123.1 120.2 None 183.7 181.1 None 208.0 187.6 None PIPE13349 A4 ZPIP11914 4.25 0 1 CIRCULAR 0.004 RCP 69.2 69.8 None 0.65 119.8 108.2 None 180.5 127.9 None 206.1 135.9 None PIPE12335 A4 ZPIP10081 2 0 1 CIRCULAR 0.016 RCP 10.9 10.9 None 0.39 21.1 21.1 None 33.0 31.4 None 38.0 35.7 None PIPE12405 A4 ZPIP10137 4 0 1 CIRCULAR 0.034 RCP 97.1 97.7 None 0.37 194.7 195.5 None 308.8 303.3 None 352.5 330.6 None PIPE12971 A4 ZPIP11128 2.5 0 1 CIRCULAR 0.042 RCP 41.6 41.7 None 0.5 70.3 70.5 None 105.7 101.5 None 120.4 106.1 Upstream CULV10188 A4 ZCUL12346A 6 7 2 RECT_CLOSED 0.006 RCP 577.9 592.2 None 0.59 943.6 937.2 Downstream 1256.8 1251.4 Downstream 1302.0 1262.8 Downstream CULV10189 A4 ZCUL10949 6 12 1 RECT_CLOSED 0.006 RCP 501.2 509.1 None 0.51 822.1 822.2 None 1245.2 1164.0 None 1246.9 1244.1 None PIPE12384 A4 ZPIP12522 1.5 0 1 CIRCULAR 0.042 RCP 7.9 7.9 None 0.37 15.7 15.5 None 24.6 23.3 None 28.4 26.8 None PIPE12451 A4 ZPIP16752 1.5 0 1 CIRCULAR 0.035 RCP 9.8 9.8 None 0.49 15.6 15.6 None 23.0 24.9 Upstream 26.1 24.7 Both Upstream and Downstream PIPE13152 A4 ZPIP15337 5 0 1 CIRCULAR 0.011 RCP 115.7 112.9 None 0.42 206.0 193.1 None 320.6 280.3 None 362.4 336.4 None DTCH10279 A4 1.5 3 1 PARABOLIC 0.012 Concrete 6.8 6.7 None 0.32 13.6 13.5 None 21.4 22.3 None 24.8 25.8 None PIPE12912 A4 ZPIP17051 2 0 1 CIRCULAR 0.038 CMP 20.6 23.1 None 0.97 35.5 22.9 Both Upstream and Downstream 53.6 27.8 Both Upstream and Downstream 61.2 29.6 Both Upstream and Downstream PIPE12989 A4 ZPIP14741 2 0 1 CIRCULAR 0.029 RCP 12.0 12.1 None 0.32 25.4 26.7 Downstream 39.9 41.6 Downstream 46.2 47.5 Downstream CULV10190 A4 ZCUL13914 4 9 1 RECT_CLOSED 0.003 RCP 133.5 134.1 None 0.46 218.4 219.6 None 328.8 324.5 None 341.1 366.0 None PIPE12454 A4 ZPIP10248 1.5 0 1 CIRCULAR 0.027 RCP 9.5 9.5 None 0.55 16.7 16.6 None 25.3 20.4 Both Upstream and Downstream 28.9 21.4 Both Upstream and Downstream PIPE12601 A4 ZPIP13108 2 0 1 CIRCULAR 0.042 RCP 27.9 27.9 None 0.6 49.8 49.1 None 76.3 57.3 Upstream 87.4 56.8 Both Upstream and Downstream PIPE12942 A4 ZPIP11050 2.25 0 1 CIRCULAR 0.025 RCP 35.5 35.1 None 0.72 63.9 50.0 Both Upstream and Downstream 97.0 56.9 Both Upstream and Downstream 111.0 60.4 Both Upstream and Downstream PIPE12398 A4 ZPIP12547 4 0 1 CIRCULAR 0.026 RCP 78.6 78.8 None 0.34 162.5 162.4 None 260.4 256.3 None 297.9 281.0 Upstream CULV10187 A4 CUL040 6 0 1 CIRCULAR 0.010 RCP 386.6 278.5 Upstream 0.66 632.5 376.2 Both Upstream and Downstream 766.3 477.2 Both Upstream and Downstream 2991.3 515.7 Both Upstream and Downstream PIPE13225 A4 ZPIP17519 1.5 0 1 CIRCULAR 0.013 RCP 0.9 0.9 None 0.07 1.5 2.0 None 2.7 13.4 None 2.9 14.7 None PIPE13572 A4 2.5 0 1 CIRCULAR 0.005 RCP 12.2 12.3 None 0.42 19.4 19.2 None 28.4 26.6 None 32.1 35.4 None PIPE13602 A4 3.5 0 1 CIRCULAR 0.005 RCP 32.0 32.2 None 0.46 52.0 52.0 None 77.2 76.3 None 87.6 86.5 None PIPE12651 A4 ZPIP13211 2 0 1 CIRCULAR 0.046 RCP 28.6 28.7 None 0.59 51.0 50.2 None 78.0 56.5 None 89.4 58.4 Upstream PIPE12733 A4 ZPIP16907 2.5 0 1 CIRCULAR 0.013 RCP 13.5 13.5 None 0.29 29.5 29.5 None 47.0 46.1 None 54.5 55.5 None PIPE12852 A4 ZPIP10710 2.5 0 1 CIRCULAR 0.030 RCP 29.3 29.3 None 0.41 51.3 51.2 None 78.0 79.4 None 89.3 85.3 None PIPE12902 A4 ZPIP13843 2.5 0 1 CIRCULAR 0.006 RCP 12.3 12.4 None 0.39 20.8 20.9 None 31.7 38.4 None 36.5 38.8 Both Upstream and Downstream PIPE13034 A4 ZPIP17295 4 0 1 CIRCULAR 0.006 RCP 45.6 50.7 None 0.46 74.5 81.7 None 112.9 121.1 None 128.4 134.1 None PIPE13057 A4 ZPIP15157 3 0 1 CIRCULAR 0.019 RCP 42.3 42.5 None 0.46 68.5 68.4 None 101.9 100.1 None 115.3 111.0 Downstream PIPE13084 A4 ZPIP15179 5.5 0 1 CIRCULAR 0.010 RCP 163.3 164.0 None 0.49 263.7 265.2 None 390.3 354.8 None 432.8 405.4 None PIPE13199 A4 ZPIP11719 2 0 1 CIRCULAR 0.055 RCP 26.0 26.1 None 0.49 42.0 42.0 None 62.2 58.5 None 70.5 64.3 None PIPE13214 A4 ZPIP17512 2.5 0 1 CIRCULAR 0.004 RCP 12.2 12.2 None 0.44 19.7 19.7 None 29.3 29.3 None 33.2 33.2 None PIPE13373 A4 ZPIP11927 2 0 1 CIRCULAR 0.005 RCP 7.9 7.9 None 0.49 12.7 12.4 None 19.2 18.0 None 21.9 19.4 None PIPE12782 A4 ZPIP13406 1.5 0 1 CIRCULAR 0.010 RCP 4.9 4.9 None 0.46 102.8 7.8 None 26.6 11.2 None 23.3 12.6 None PIPE12999 A4 ZPIP17243 3 0 1 CIRCULAR 0.059 RCP 83.8 83.7 None 0.52 167.2 159.7 None 261.1 191.1 Both Upstream and Downstream 301.1 193.9 Both Upstream and Downstream CULV10191 A4 ZCUL15787 4 6 1 RECT_CLOSED 0.003 RCP 54.9 48.3 None 0.3 85.0 77.6 None 139.8 171.8 None 152.7 193.3 None PIPE13083 A4 ZPIP15178 5.5 0 1 CIRCULAR 0.010 RCP 164.0 164.6 None 0.49 264.5 266.7 None 391.5 351.6 None 436.9 402.1 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 46 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE12716 A4 ZPIP13280 4.5 0 1 CIRCULAR 0.024 RCP 147.9 147.9 None 0.48 263.2 260.0 None 399.9 346.3 Upstream 457.7 362.2 Both Upstream and Downstream PIPE12458 A4 ZPIP10298 2.5 0 1 CIRCULAR 0.011 RCP 17.6 17.6 None 0.42 27.9 27.9 None 40.7 44.6 None 46.0 49.8 None CULV10206 A4 ZCUL11685 4 9 1 RECT_CLOSED 0.005 RCP 133.6 134.2 None 0.39 219.3 220.4 None 356.4 326.1 None 352.7 406.1 None PIPE13326 A4 ZPIP15885 1.5 0 1 CIRCULAR 0.005 RCP 2.6 2.6 None 0.35 4.9 4.9 None 7.7 7.6 None 8.8 8.8 None PIPE13429 A4 ZPIP12010 2.5 0 1 CIRCULAR 0.005 RCP 13.7 20.0 None 0.69 22.0 27.9 Downstream 28.0 35.1 Both Upstream and Downstream 30.9 33.8 Both Upstream and Downstream PIPE13615 A4 ZPIP17511 2.5 0 1 CIRCULAR 0.000 RCP 3.9 3.7 None 0.48 6.1 5.9 None 9.1 7.8 None 10.4 9.2 None PIPE12403 A4 ZPIP10135 3 0 1 CIRCULAR 0.039 RCP 37.1 37.3 None 0.28 83.3 83.5 None 138.4 135.0 None 158.6 154.0 None PIPE12597 A4 ZPIP16869 4.5 0 1 CIRCULAR 0.016 RCP 82.8 94.4 None 0.38 169.2 189.2 None 272.6 279.9 Both Upstream and Downstream 317.8 287.8 Both Upstream and Downstream PIPE13025 A4 ZPIP11386 2 0 1 CIRCULAR 0.007 RCP 0.1 0.1 None 0.01 0.2 0.1 None 3.1 0.4 None 8.6 22.8 None CULV10205 A4 ZCUL13084 4 9 1 RECT_CLOSED 0.005 RCP 134.7 135.4 None 0.39 223.0 224.0 None 393.2 330.8 None 390.2 401.2 None PIPE13081 A4 ZPIP11512 2 0 1 CIRCULAR 0.003 RCP 0.0 0.0 None 0 0.0 0.0 None 0.2 16.2 None 0.3 13.3 None PIPE13200 A4 ZPIP15571 2 0 1 CIRCULAR 0.024 RCP 14.0 14.1 None 0.4 22.7 22.7 None 33.8 34.0 None 38.3 41.0 None PIPE12357 A4 ZPIP12499 2 0 1 CIRCULAR 0.019 RCP 11.9 11.9 None 0.38 19.5 19.4 None 28.8 36.6 None 32.7 36.7 None PIPE12851 A4 ZPIP10709 2 0 1 CIRCULAR 0.026 RCP 14.5 14.5 None 0.4 24.9 24.9 None 37.3 40.7 None 42.5 42.1 None PIPE12992 A4 ZPIP11276 2 0 1 CIRCULAR 0.025 RCP 7.2 7.2 None 0.2 17.1 17.0 None 27.6 30.3 None 32.2 41.1 None PIPE13390 A4 ZPIP17633 4 0 1 CIRCULAR 0.005 RCP 39.9 44.0 None 0.43 65.4 71.2 None 99.0 105.7 None 112.7 118.8 None PIPE13535 A4 3.5 0 1 CIRCULAR 0.009 RCP 40.9 41.2 None 0.44 66.4 66.4 None 98.8 96.8 None 112.2 108.7 None PIPE12618 A4 ZPIP10433 1.5 0 1 CIRCULAR 0.019 RCP 1.2 1.2 None 0.08 2.4 2.4 None 3.7 12.3 Both Upstream and Downstream 4.3 16.5 Both Upstream and Downstream PIPE12416 A4 ZPIP10147 2.5 0 1 CIRCULAR 0.016 RCP 14.4 14.4 None 0.28 31.6 31.6 None 50.4 50.2 None 58.4 58.7 None PIPE12563 A4 ZPIP13047 3.5 0 1 CIRCULAR 0.034 RCP 68.6 68.6 None 0.37 129.5 129.1 None 197.7 198.6 None 227.8 211.6 Upstream PIPE13222 A4 ZPIP17516 2 0 1 CIRCULAR 0.015 RCP 9.4 9.4 None 0.34 15.2 15.2 None 22.5 26.4 None 25.4 31.4 None PIPE13534 A4 3.5 0 1 CIRCULAR 0.009 RCP 40.8 41.0 None 0.43 66.0 66.1 None 97.9 96.7 None 111.3 109.5 None PIPE13568 A4 2 0 1 CIRCULAR 0.005 RCP 5.1 5.1 None 0.32 8.1 8.1 None 11.9 11.1 None 13.4 18.3 None PIPE12691 A4 ZPIP13249 3.5 0 1 CIRCULAR 0.033 RCP 77.4 76.1 None 0.42 129.7 123.6 None 195.3 184.8 None 222.6 207.4 None PIPE12753 A4 ZPIP13325 4 0 1 CIRCULAR 0.020 RCP 77.2 77.3 None 0.38 143.3 143.4 None 218.0 218.9 None 250.5 230.2 None PIPE13056 A4 ZPIP11501 1.5 0 1 CIRCULAR 0.009 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 10.3 None 0.0 11.4 Both Upstream and Downstream PIPE13079 A4 ZPIP11510 5 0 1 CIRCULAR 0.008 RCP 105.3 105.5 None 0.45 170.1 170.1 None 252.8 236.2 None 286.9 267.9 None PIPE13428 A4 ZPIP12009 2.5 0 1 CIRCULAR 0.007 RCP 15.6 23.2 None 0.67 25.7 34.6 None 34.0 38.8 Both Upstream and Downstream 36.3 39.3 Both Upstream and Downstream PIPE13471 A4 PIP16805 3 0 1 CIRCULAR 0.030 RCP 31.2 31.3 None 0.27 70.3 70.4 None 112.7 112.9 None 130.6 130.0 None PIPE12823 A4 ZPIP10651 2.5 0 1 CIRCULAR 0.028 RCP 34.7 34.7 None 0.51 55.8 55.7 None 82.6 76.4 Upstream 93.5 76.5 Both Upstream and Downstream PIPE12891 A4 ZPIP10807 2 0 1 CIRCULAR 0.005 RCP 3.7 5.0 None 0.32 5.8 11.8 None 8.8 19.4 None 9.9 17.6 None PIPE13426 A4 ZPIP16150 2 0 1 CIRCULAR 0.026 RCP 15.5 23.1 None 0.64 25.6 33.3 None 38.8 39.8 Upstream 44.0 40.4 Both Upstream and Downstream PIPE13540 A4 6 0 1 CIRCULAR 0.023 RCP 215.9 219.2 None 0.34 402.1 401.4 None 617.9 624.5 Upstream 710.8 710.0 Upstream PIPE12602 A4 ZPIP13109 2 0 1 CIRCULAR 0.057 RCP 27.2 27.2 None 0.5 48.6 48.7 None 74.4 56.6 Both Upstream and Downstream 85.3 59.8 Both Upstream and Downstream PIPE12954 A4 ZPIP14453 1.5 0 1 CIRCULAR 0.479 RCP 27.6 27.9 None 0.38 56.2 50.1 None 93.4 75.0 None 109.5 80.8 Upstream CULV10194 A4 ZCUL14923 4 8 1 RECT_CLOSED 0.015 RCP 272.9 279.4 None 0.51 443.8 437.8 None 651.8 564.0 None 661.9 608.2 None CULV10195 A4 ZCUL10679 4 8 1 RECT_CLOSED 0.015 RCP 271.7 274.5 None 0.5 443.2 436.7 None 653.0 564.1 None 668.0 608.3 None PIPE13330 A4 ZPIP15890 3 0 1 CIRCULAR 0.004 RCP 14.5 12.1 None 0.3 28.2 30.4 None 44.2 46.7 None 52.2 44.3 None CULV10238 A4 ZCUL16815 4 8 1 RECT_CLOSED 0.015 RCP 270.9 272.5 None 0.5 442.0 435.4 None 652.1 564.0 None 668.9 608.3 None PIPE12327 A4 ZPIP12351 3 0 1 CIRCULAR 0.031 RCP 39.4 39.4 None 0.33 76.7 76.1 None 119.0 116.2 None 136.8 129.0 None PIPE12365 A4 ZPIP12505 3 0 1 CIRCULAR 0.059 RCP 71.2 71.0 None 0.44 120.5 117.6 None 180.3 171.1 None 204.4 177.6 None PIPE12803 A4 ZPIP13498 2 0 1 CIRCULAR 0.070 RCP 27.4 27.4 None 0.46 43.4 43.3 None 63.8 63.8 None 71.9 65.7 None PIPE12820 A4 ZPIP10647 1.5 0 1 CIRCULAR 0.009 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 9.3 Downstream 0.0 10.7 Downstream PIPE12890 A4 ZPIP10806 1.5 0 1 CIRCULAR 0.005 CIPCP 3.5 3.5 None 0.54 5.6 6.6 None 8.2 7.5 Both Upstream and Downstream 8.2 7.2 Both Upstream and Downstream PIPE13339 A4 ZPIP11900 1.5 0 1 CIRCULAR 0.009 RCP 4.4 4.4 None 0.45 7.2 7.2 None 10.8 10.7 None 12.3 10.8 Downstream PIPE12547 A4 ZPIP16840 1.5 0 1 CIRCULAR 0.010 RCP 4.3 4.3 None 0.42 6.8 6.8 None 10.0 9.9 None 11.3 11.2 None PIPE12598 A4 ZPIP10423 4.5 0 1 CIRCULAR 0.016 RCP 80.3 90.0 None 0.37 163.6 181.2 None 262.2 262.1 Both Upstream and Downstream 305.9 268.0 Both Upstream and Downstream PIPE12847 A4 ZPIP10698 1.5 0 1 CIRCULAR 0.091 RCP 15.0 15.0 None 0.48 24.0 23.9 None 35.5 32.6 None 40.3 34.4 None PIPE12923 A4 ZPIP17111 1.5 0 1 CIRCULAR 0.021 RCP 5.9 4.7 Both Upstream and Downstream 0.31 4.5 6.9 Both Upstream and Downstream 3.8 16.0 Both Upstream and Downstream 5.8 16.5 Both Upstream and Downstream PIPE12556 A4 ZPIP10388 2.5 0 1 CIRCULAR 0.034 RCP 25.7 25.7 None 0.34 45.1 45.1 None 69.2 69.0 None 79.1 81.5 None PIPE12610 A4 ZPIP16657 3 0 1 CIRCULAR 0.010 RCP 19.8 20.0 None 0.3 34.4 48.5 None 66.8 69.0 Both Upstream and Downstream 73.2 71.0 Both Upstream and Downstream PIPE12696 A4 ZPIP13252 4 0 1 CIRCULAR 0.061 RCP 101.8 102.2 None 0.29 210.7 211.6 None 333.0 333.1 None 384.5 385.9 None PIPE13058 A4 ZPIP15158 2.5 0 1 CIRCULAR 0.041 RCP 34.7 34.8 None 0.42 56.0 55.9 None 82.5 80.3 None 93.5 89.5 None PIPE13149 A4 ZPIP11597 5 0 1 CIRCULAR 0.011 RCP 101.9 98.9 None 0.37 182.2 170.9 None 283.5 246.2 None 321.1 289.0 None PIPE13367 A4 ZPIP15983 2.5 0 1 CIRCULAR 0.040 RCP 43.3 43.4 None 0.53 69.4 68.1 None 102.7 86.5 None 116.2 88.5 None PIPE13477 A4 PIP20019 1.5 0 1 CIRCULAR 0.004 RCP 0.0 0.0 None 0 0.0 5.3 None 0.0 7.0 Upstream 0.0 7.5 Both Upstream and Downstream PIPE12324 A4 ZPIP12348 3.5 0 1 CIRCULAR 0.016 RCP 42.7 42.7 None 0.33 82.9 82.9 None 129.2 123.4 None 148.5 137.5 None PIPE12818 A4 ZPIP16961 2.5 0 1 CIRCULAR 0.034 RCP 34.7 34.7 None 0.46 55.6 55.8 None 82.3 76.5 Downstream 93.1 80.9 Both Upstream and Downstream PIPE12935 A4 ZPIP14285 2 0 1 CIRCULAR 0.009 RCP 0.2 0.1 None 0.01 0.3 0.2 None 0.5 13.2 None 0.5 22.6 Both Upstream and Downstream CULV10237 A4 ZCUL16814 4 8 1 RECT_CLOSED 0.015 RCP 254.3 258.2 None 0.47 415.8 408.5 None 614.2 536.8 None 653.0 584.3 None PIPE12364 A4 ZPIP12504 4 0 1 CIRCULAR 0.018 RCP 73.8 73.5 None 0.38 124.7 121.5 None 185.6 195.6 None 209.5 205.8 None PIPE12800 A4 ZPIP13492 2 0 1 CIRCULAR 0.067 RCP 27.3 27.4 None 0.47 43.3 43.4 None 63.8 60.5 None 71.9 61.8 None PIPE12996 A4 ZPIP14744 3 0 1 CIRCULAR 0.080 RCP 89.3 89.1 None 0.47 177.4 174.8 None 276.2 195.5 Both Upstream and Downstream 318.4 200.4 Both Upstream and Downstream PIPE13080 A4 ZPIP11511 5 0 1 CIRCULAR 0.009 RCP 106.2 106.4 None 0.42 171.8 172.2 None 255.3 236.6 None 289.7 266.3 None PIPE13223 A4 ZPIP15601 4 0 1 CIRCULAR 0.003 RCP 38.5 38.5 None 0.5 63.7 60.8 None 95.6 78.8 None 108.3 80.8 Upstream PIPE13251 A4 ZPIP15658 2 0 1 CIRCULAR 0.030 RCP 10.4 10.4 None 0.27 23.0 23.0 None 36.8 36.2 None 42.7 41.5 None DTCH10283 A4 1.5 3 1 PARABOLIC 0.028 Concrete 12.7 12.7 None 0.4 21.7 21.7 None 33.0 29.3 Downstream 37.8 33.5 Downstream PIPE12396 A4 ZPIP10134 4 0 1 CIRCULAR 0.037 RCP 78.8 78.8 None 0.29 162.5 162.1 None 260.9 263.9 None 299.3 288.7 Downstream PIPE12671 A4 ZPIP10489 4 0 1 CIRCULAR 0.020 RCP 79.4 78.2 None 0.38 133.1 126.9 None 200.3 190.1 None 228.4 213.2 None PIPE12752 A4 ZPIP10538 4 0 1 CIRCULAR 0.029 RCP 86.3 86.3 None 0.36 158.3 158.0 None 240.5 240.9 None 276.0 253.8 None PIPE13145 A4 ZPIP17421 4 0 1 CIRCULAR 0.002 RCP 30.1 30.1 None 0.47 51.8 44.7 None 82.8 62.5 None 96.6 67.5 None PIPE13220 A4 ZPIP17514 1.5 0 1 CIRCULAR 0.009 RCP 0.0 0.0 None 0 0.1 0.0 None 0.1 6.0 None 0.5 10.6 None PIPE12453 A4 ZPIP16754 2 0 1 CIRCULAR 0.038 RCP 23.9 23.9 None 0.54 39.7 39.4 None 59.0 46.0 Downstream 67.0 46.3 Both Upstream and Downstream PIPE12937 A4 ZPIP17132 3 0 1 CIRCULAR 0.011 RCP 38.0 38.0 None 0.54 63.1 59.3 None 94.8 71.0 None 108.1 73.0 None PIPE12944 A4 ZPIP14317 4 0 1 CIRCULAR 0.002 RCP 29.6 29.6 None 0.46 50.2 43.9 None 79.4 61.1 None 93.0 66.1 None PIPE13054 A4 ZPIP11499 3 0 1 CIRCULAR 0.028 RCP 42.5 42.6 None 0.38 68.5 68.5 None 102.3 103.7 None 115.7 116.1 Upstream

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 47 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE13151 A4 ZPIP15336 5 0 1 CIRCULAR 0.011 RCP 102.1 99.0 None 0.37 183.2 169.3 None 285.7 245.9 None 322.2 280.1 None PIPE13169 A4 ZPIP15487 2 0 1 CIRCULAR 0.045 RCP 18.7 18.8 None 0.39 30.0 30.0 None 44.4 44.2 None 50.3 49.8 None PIPE13227 A4 ZPIP11738 1.5 0 1 CIRCULAR 0.004 RCP 0.0 0.0 None 0 0.0 0.3 None 0.4 7.0 None 0.7 6.8 None PIPE13357 A4 ZPIP11917 1.5 0 1 CIRCULAR 0.015 RCP 5.2 5.1 None 0.4 8.2 8.2 None 12.1 11.9 None 13.7 13.3 None PIPE13547 A4 6 0 1 CIRCULAR 0.022 RCP 212.0 214.7 None 0.34 394.4 394.2 None 606.3 628.5 Both Upstream and Downstream 697.3 658.6 Both Upstream and Downstream PIPE13022 A4 ZPIP17288 4 0 1 CIRCULAR 0.012 RCP 53.8 53.5 None 0.34 89.1 88.2 None 142.6 130.2 None 157.1 164.1 None PIPE13030 A4 ZPIP14957 4 0 1 CIRCULAR 0.017 RCP 65.6 66.1 None 0.35 108.1 108.9 None 161.3 162.2 None 185.9 192.6 None PIPE13060 A4 ZPIP15160 2 0 1 CIRCULAR 0.074 RCP 22.5 22.6 None 0.37 36.1 36.0 None 53.4 53.5 None 60.5 63.4 None PIPE13228 A4 ZPIP15608 4 0 1 CIRCULAR 0.006 RCP 44.0 44.9 None 0.41 72.4 63.4 None 108.9 111.1 None 123.8 113.2 None PIPE13378 A4 ZPIP17618 2.5 0 1 CIRCULAR 0.124 RCP 48.4 48.4 None 0.34 85.6 85.5 None 129.7 130.0 None 149.3 149.1 None PIPE12423 A4 ZPIP12580 1.5 0 1 CIRCULAR 0.074 RCP 1.9 1.9 None 0.07 3.0 3.0 None 4.4 15.4 Upstream 5.0 29.0 Both Upstream and Downstream PIPE12611 A4 ZPIP13114 3 0 1 CIRCULAR 0.022 RCP 31.3 31.4 None 0.32 56.7 56.6 None 86.3 98.4 None 98.2 100.1 Downstream PIPE12665 A4 ZPIP10485 1.5 0 1 CIRCULAR 0.058 RCP 3.5 3.5 None 0.14 6.2 12.1 None 17.3 25.9 Both Upstream and Downstream 10.7 25.9 Both Upstream and Downstream PIPE12669 A4 ZPIP13231 1.5 0 1 CIRCULAR 0.040 RCP 7.9 7.9 None 0.38 13.0 13.0 None 19.4 20.7 Downstream 22.0 21.2 Both Upstream and Downstream PIPE12778 A4 ZPIP13404 3.5 0 1 CIRCULAR 0.043 RCP 68.6 68.6 None 0.33 129.1 128.7 None 197.4 199.2 None 227.1 212.7 Both Upstream and Downstream PIPE12993 A4 ZPIP11277 3.5 0 1 CIRCULAR 0.038 RCP 89.5 89.1 None 0.45 177.6 200.2 None 277.3 196.9 Both Upstream and Downstream 319.6 201.2 Both Upstream and Downstream PIPE13077 A4 ZPIP15176 3 0 1 CIRCULAR 0.021 RCP 40.1 40.1 None 0.42 64.6 64.2 None 96.2 91.5 None 109.1 98.2 None PIPE13479 A4 PIP20022 2 0 1 CIRCULAR 0.005 RCP 1.4 16.2 None 1.04 2.2 19.9 Upstream 3.2 11.2 Both Upstream and Downstream 3.6 15.9 Both Upstream and Downstream PIPE12578 A4 ZPIP13064 1.5 0 1 CIRCULAR 0.045 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 15.3 Both Upstream and Downstream 0.0 22.3 Both Upstream and Downstream PIPE12608 A4 ZPIP16655 4.5 0 1 CIRCULAR 0.028 RCP 107.2 121.9 None 0.37 222.4 243.5 None 353.2 325.1 Downstream 401.2 332.9 Both Upstream and Downstream PIPE12899 A4 ZPIP13840 2.5 0 1 CIRCULAR 0.011 RCP 3.9 3.9 None 0.09 6.3 6.4 None 9.5 43.8 None 10.7 43.2 Upstream CULV10202 A4 ZCUL14925 6 12 1 RECT_CLOSED 0.012 RCP 505.5 519.8 None 0.37 828.9 830.0 None 1241.9 1196.4 None 1227.0 1442.6 None PIPE12467 A4 ZPIP10302 2 0 1 CIRCULAR 0.021 RCP 12.5 12.6 None 0.38 19.9 19.9 None 29.0 28.9 None 32.8 32.8 None PIPE13013 A4 ZPIP11286 3 0 1 CIRCULAR 0.084 RCP 85.1 84.9 None 0.44 169.4 161.7 None 264.4 189.6 Both Upstream and Downstream 304.8 194.1 Both Upstream and Downstream PIPE13071 A4 ZPIP11507 2.5 0 1 CIRCULAR 0.023 RCP 25.9 26.0 None 0.41 41.7 41.8 None 62.0 58.5 None 70.2 62.5 None PIPE13278 A4 ZPIP17528 1.5 0 1 CIRCULAR 0.010 HDPE 3.9 3.9 None 0.37 6.3 6.3 None 9.3 9.3 None 10.6 10.5 None PIPE12627 A4 ZPIP10436 4.5 0 1 CIRCULAR 0.026 RCP 99.5 114.2 None 0.36 205.4 226.2 None 327.9 302.7 None 380.7 313.3 Both Upstream and Downstream PIPE12674 A4 ZPIP13234 2 0 1 CIRCULAR 0.014 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 23.4 None 0.0 26.7 Downstream PIPE12886 A4 ZPIP10803 2.5 0 1 CIRCULAR 0.025 RCP 27.1 27.3 None 0.42 49.4 51.2 None 75.9 62.9 Both Upstream and Downstream 87.0 64.9 Both Upstream and Downstream CULV10211 A4 ZCUL10959 6 12 1 RECT_CLOSED 0.004 RCP 337.9 343.7 None 0.4 553.9 547.5 None 877.2 769.8 None 868.1 851.0 None PIPE13074 A4 ZPIP15172 2 0 1 CIRCULAR 0.009 RCP 8.4 8.4 None 0.4 13.4 13.4 None 19.7 19.3 None 22.3 20.7 None PIPE13206 A4 ZPIP11723 2 0 1 CIRCULAR 0.013 PVC 9.3 9.4 None 0.37 14.6 14.9 None 21.2 22.0 None 57.2 25.1 None PIPE13529 A4 4.5 0 1 CIRCULAR 0.006 RCP 55.3 56.0 None 0.38 88.6 89.8 None 131.3 127.9 None 146.7 144.5 None PIPE12410 A4 ZPIP12556 4.5 0 1 CIRCULAR 0.023 RCP 153.8 150.6 None 0.51 305.6 236.0 None 481.3 277.6 None 555.3 292.2 None PIPE12560 A4 ZPIP13044 2.5 0 1 CIRCULAR 0.078 RCP 41.6 41.7 None 0.36 71.6 71.6 None 109.3 110.2 Downstream 124.7 112.6 Downstream PIPE12687 A4 ZPIP13245 3 0 1 CIRCULAR 0.049 RCP 27.3 37.4 None 0.25 61.9 76.5 None 102.6 123.4 None 120.2 145.5 None PIPE12693 A4 ZPIP10498 4 0 1 CIRCULAR 0.024 RCP 79.4 78.3 None 0.35 133.2 126.9 None 200.5 195.9 None 228.6 217.0 None PIPE12792 A4 ZPIP13474 1.5 0 1 CIRCULAR 0.025 RCP 15.2 1.3 Downstream 0.08 15.0 9.6 Both Upstream and Downstream 25.5 15.1 Both Upstream and Downstream 16.2 16.3 Both Upstream and Downstream PIPE13070 A4 ZPIP11506 2 0 1 CIRCULAR 0.079 RCP 26.0 26.1 None 0.41 41.9 41.9 None 62.1 58.4 None 70.4 62.6 None PIPE13082 A4 ZPIP15177 5 0 1 CIRCULAR 0.010 RCP 107.0 107.5 None 0.41 173.7 174.9 None 258.7 238.8 None 292.5 257.5 None PIPE13217 A4 ZPIP11732 2.5 0 1 CIRCULAR 0.005 RCP 10.3 10.3 None 0.37 16.5 16.5 None 24.4 24.4 None 27.6 27.6 None PIPE13474 A4 PIP16808 2.5 0 1 CIRCULAR 0.082 RCP 33.2 33.3 None 0.28 64.8 64.9 None 100.4 100.3 None 115.5 116.0 None PIPE12367 A4 ZPIP12507 3 0 1 CIRCULAR 0.060 RCP 47.1 47.4 None 0.29 91.2 91.9 None 141.7 140.7 None 163.5 158.8 None PIPE12477 A4 ZPIP10306 2.5 0 1 CIRCULAR 0.072 RCP 37.1 37.1 None 0.34 65.6 65.2 None 100.7 92.1 None 115.1 106.0 None CULV10204 A4 ZCUL15793 6 12 1 RECT_CLOSED 0.007 RCP 383.8 394.7 None 0.37 630.3 626.8 None 991.8 894.0 None 1011.0 1019.4 None PIPE13148 A4 ZPIP11596 2 0 1 CIRCULAR 0.014 RCP 10.5 10.5 None 0.39 17.1 16.3 Both Upstream and Downstream 27.0 23.2 Both Upstream and Downstream 32.1 26.1 Both Upstream and Downstream PIPE12572 A4 ZPIP13056 7 0 1 CIRCULAR 0.014 RCP 293.1 316.7 None 0.42 461.0 538.7 Downstream 829.6 678.0 Both Upstream and Downstream 978.4 718.1 Both Upstream and Downstream PIPE12648 A4 ZPIP10477 3 0 1 CIRCULAR 0.005 RCP 13.3 13.4 None 0.29 25.1 25.1 None 38.1 38.1 None 44.0 44.4 None PIPE12756 A4 ZPIP16909 5.5 0 1 CIRCULAR 0.022 RCP 137.3 138.1 None 0.28 276.2 277.3 None 424.1 431.5 Downstream 470.1 475.2 Both Upstream and Downstream PIPE12831 A4 ZPIP16983 2 0 1 CIRCULAR 0.025 RCP 11.5 11.5 None 0.32 18.3 18.4 None 27.0 26.9 None 30.5 34.1 None PIPE12939 A4 ZPIP11037 2 0 1 CIRCULAR 0.037 RCP 23.6 23.5 None 0.54 39.1 38.8 None 58.2 42.1 Both Upstream and Downstream 66.1 42.2 Both Upstream and Downstream PIPE13120 A4 ZPIP11563 3.5 0 1 CIRCULAR 0.003 RCP 30.6 29.0 None 0.54 48.6 38.7 None 69.4 48.5 None 77.6 52.0 None PIPE13240 A4 ZPIP15650 3 0 1 CIRCULAR 0.077 RCP 54.3 54.4 None 0.29 111.1 111.2 None 174.9 171.4 Downstream 202.0 177.1 Both Upstream and Downstream PIPE13473 A4 PIP16807 2.5 0 1 CIRCULAR 0.083 RCP 32.3 32.4 None 0.27 63.4 63.4 None 98.3 98.2 None 113.2 113.7 None PIPE12359 A4 ZPIP12501 1.5 0 1 CIRCULAR 0.019 RCP 4.6 4.6 None 0.32 7.9 7.9 None 11.9 11.9 None 13.6 13.5 None PIPE12443 A4 ZPIP10179 3 0 1 CIRCULAR 0.036 RCP 27.8 27.7 None 0.22 62.8 62.9 None 100.4 101.2 None 116.6 119.4 None PIPE12530 A4 ZPIP10360 4.5 0 1 CIRCULAR 0.026 RCP 72.3 79.9 None 0.25 144.4 157.0 None 228.1 247.9 None 265.6 298.8 None PIPE12976 A4 ZPIP14473 2 0 1 CIRCULAR 0.016 RCP 9.6 9.6 None 0.34 16.1 16.1 None 24.1 24.1 None 27.5 27.1 None PIPE13233 A4 ZPIP15646 3 0 1 CIRCULAR 0.079 RCP 62.8 62.9 None 0.34 125.6 124.3 None 196.6 176.3 Downstream 226.7 177.8 Both Upstream and Downstream PIPE13548 A4 6 0 1 CIRCULAR 0.027 RCP 174.7 173.9 None 0.25 328.0 325.0 None 504.3 529.2 Downstream 578.1 658.8 Both Upstream and Downstream PIPE12559 A4 ZPIP13043 2.5 0 1 CIRCULAR 0.090 RCP 38.9 38.9 None 0.32 67.4 67.4 None 103.2 104.8 None 117.9 115.3 None PIPE12581 A4 ZPIP16865 1.5 0 1 CIRCULAR 0.087 RCP 9.5 8.3 None 0.27 172.2 12.4 Downstream 520.6 25.3 Downstream 633.0 29.0 Downstream PIPE12943 A4 ZPIP11051 4 0 1 CIRCULAR 0.002 RCP 35.0 33.5 None 0.51 56.7 47.0 None 82.4 56.7 None 92.7 61.2 None PIPE13461 A4 ZPIP16589 2 0 1 CIRCULAR 0.027 RCP 9.4 9.4 None 0.25 19.2 19.3 None 30.2 30.2 None 35.0 34.9 None PIPE13519 A4 1.5 0 1 CIRCULAR 0.149 HDPE 12.9 12.9 None 0.32 22.0 22.0 None 33.3 33.3 None 38.1 38.1 None PIPE13562 A4 4.5 0 1 CIRCULAR 0.019 RCP 63.9 64.2 None 0.24 121.2 120.9 None 196.8 262.6 None 232.5 255.2 Downstream PIPE12429 A4 ZPIP12584 1.5 0 1 CIRCULAR 0.055 RCP 4.4 4.4 None 0.18 7.0 7.0 None 10.3 21.1 Both Upstream and Downstream 11.6 23.0 Both Upstream and Downstream PIPE12811 A4 ZPIP10631 1 0 1 CIRCULAR 0.039 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 6.5 None PIPE12841 A4 ZPIP16993 3.5 0 1 CIRCULAR 0.015 RCP 49.7 48.0 None 0.39 86.0 74.4 None 130.6 104.2 None 149.4 114.8 None PIPE12945 A4 ZPIP14318 4 0 1 CIRCULAR 0.002 RCP 34.5 32.8 None 0.51 55.4 46.1 None 80.4 55.9 None 90.2 59.3 None PIPE13062 A4 ZPIP15162 1.5 0 1 CIRCULAR 0.007 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.2 None 0.0 8.4 None PIPE13171 A4 ZPIP17472 2 0 1 CIRCULAR 0.082 RCP 22.5 22.5 None 0.35 36.1 36.0 None 53.4 53.3 None 60.5 60.2 None PIPE13314 A4 ZPIP15755 2.5 0 1 CIRCULAR 0.005 HDPE 7.3 7.3 None 0.25 15.4 15.4 None 23.8 23.6 None 27.7 27.4 None PIPE13350 A4 ZPIP15959 4.25 0 1 CIRCULAR 0.013 RCP 83.0 83.6 None 0.44 142.9 126.9 None 215.5 166.1 None 246.4 179.0 None PIPE13470 A4 PIP16804 2.5 0 1 CIRCULAR 0.080 RCP 30.3 30.3 None 0.26 60.1 60.1 None 93.5 93.4 None 107.8 108.2 None PIPE13569 A4 2 0 1 CIRCULAR 0.005 RCP 5.0 5.0 None 0.31 7.9 8.0 None 11.6 11.7 None 13.3 14.8 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 48 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE12839 A4 ZPIP16991 1.75 0 1 CIRCULAR 0.049 RCP 19.9 17.5 None 0.5 34.2 21.6 None 51.8 30.2 None 59.0 32.3 None CULV10203 A4 ZCUL13922 6 12 1 RECT_CLOSED 0.010 RCP 504.9 516.3 None 0.39 827.9 828.3 None 1253.6 1173.8 None 1242.0 1212.3 None CULV10209 A4 ZCUL10958 6 12 1 RECT_CLOSED 0.005 RCP 337.7 342.7 None 0.37 549.3 547.2 None 877.1 758.1 None 866.2 848.5 None PIPE13098 A4 ZPIP15233 5.5 0 1 CIRCULAR 0.028 RCP 213.4 215.0 None 0.39 346.4 347.7 None 516.2 459.2 None 579.8 514.7 None PIPE13121 A4 ZPIP15277 3.5 0 1 CIRCULAR 0.003 RCP 30.4 28.9 None 0.51 48.5 38.4 None 69.1 47.9 None 77.3 51.9 None PIPE12349 A4 ZPIP12494 3 0 1 CIRCULAR 0.062 RCP 44.2 44.5 None 0.27 86.6 88.0 None 134.9 134.5 None 155.8 151.2 None PIPE12404 A4 ZPIP10136 3 0 1 CIRCULAR 0.059 RCP 35.8 36.1 None 0.22 81.0 81.2 None 133.4 130.7 None 152.9 147.9 None PIPE12517 A4 ZPIP16802 2 0 1 CIRCULAR 0.005 RCP 4.9 5.0 None 0.31 8.5 8.6 None 12.8 12.8 None 14.5 14.5 None PIPE12571 A4 ZPIP19005 7 0 1 CIRCULAR 0.006 RCP 181.6 183.1 None 0.36 341.8 351.6 None 468.5 445.8 Both Upstream and Downstream 564.8 465.5 Both Upstream and Downstream PIPE12631 A4 ZPIP16879 1.5 0 1 CIRCULAR 0.016 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.2 None 0.0 12.1 None PIPE13391 A4 ZPIP17635 4 0 1 CIRCULAR 0.004 RCP 28.7 30.9 None 0.33 47.0 49.9 None 71.3 74.3 None 81.6 83.8 None PIPE12874 A4 ZPIP17036 3 0 1 CIRCULAR 0.012 RCP 21.2 21.3 None 0.29 38.5 38.6 None 58.6 58.4 None 67.0 66.8 None PIPE12990 A4 ZPIP11274 2 0 1 CIRCULAR 0.027 RCP 7.1 7.1 None 0.19 16.9 17.1 None 27.5 28.2 None 32.1 33.8 None CULV10192 A4 ZCUL10213 4 5 1 RECT_CLOSED 0.010 RCP 65.3 66.0 None 0.27 107.8 109.0 None 160.8 162.5 None 183.7 221.3 None PIPE13146 A4 ZPIP11587 4 0 1 CIRCULAR 0.003 RCP 30.9 31.0 None 0.4 53.3 46.0 None 84.9 64.0 None 98.3 69.3 None PIPE13340 A4 ZPIP15932 1.5 0 1 CIRCULAR 0.014 RCP 4.3 4.3 None 0.35 7.1 7.0 None 10.6 11.3 None 12.1 11.0 Upstream PIPE13362 A4 ZPIP15977 1.5 0 1 CIRCULAR 0.009 RCP 0.0 0.1 None 0.01 0.0 0.3 None 0.1 7.4 Both Upstream and Downstream 0.2 8.8 Both Upstream and Downstream PIPE13608 A4 ZPIP13576 2.5 0 1 CIRCULAR 0.057 RCP 34.6 34.7 None 0.35 55.5 55.6 None 82.0 77.2 None 92.8 87.5 Downstream PIPE12350 A4 ZPIP12495 3 0 1 CIRCULAR 0.091 RCP 70.9 69.0 None 0.34 130.5 126.1 None 200.3 165.2 None 229.5 176.8 None PIPE12377 A4 ZPIP12516 3 0 1 CIRCULAR 0.049 RCP 36.3 36.5 None 0.25 72.7 73.4 None 114.0 113.5 None 131.9 129.7 None PIPE12492 A4 ZPIP12896 4 0 1 CIRCULAR 0.010 RCP 38.7 39.2 None 0.27 64.3 83.2 None 92.1 126.6 Both Upstream and Downstream 117.5 127.6 Both Upstream and Downstream PIPE12558 A4 ZPIP10390 2.5 0 1 CIRCULAR 0.053 RCP 25.7 25.8 None 0.27 45.2 45.2 None 69.4 69.3 None 79.4 82.7 None PIPE12595 A4 ZPIP16867 7 0 1 CIRCULAR 0.006 RCP 141.3 142.3 None 0.28 282.8 320.5 None 432.2 415.5 Both Upstream and Downstream 479.6 442.3 Both Upstream and Downstream PIPE12615 A4 ZPIP16875 4 0 1 CIRCULAR 0.095 RCP 103.6 104.1 None 0.24 214.4 215.3 None 338.8 338.7 None 391.3 388.9 None PIPE12751 A4 ZPIP10537 3 0 1 CIRCULAR 0.043 RCP 44.7 44.8 None 0.33 78.0 77.5 None 119.0 108.5 None 136.0 121.0 None PIPE13232 A4 ZPIP15645 1.5 0 1 CIRCULAR 0.120 RCP 4.8 4.8 None 0.13 9.0 9.7 None 13.8 28.2 Both Upstream and Downstream 15.9 32.1 Both Upstream and Downstream PIPE13512 A4 ZPIP11660 1.5 0 1 CIRCULAR 0.112 RCP 11.4 11.4 None 0.32 19.5 24.9 None 29.8 27.3 Both Upstream and Downstream 34.2 31.1 Both Upstream and Downstream PIPE12321 A4 ZPIP12331 3 0 1 CIRCULAR 0.076 RCP 52.1 52.4 None 0.28 99.2 99.8 None 153.5 151.1 None 176.6 159.3 Both Upstream and Downstream PIPE12358 A4 ZPIP12500 1.5 0 1 CIRCULAR 0.031 RCP 5.6 5.6 None 0.3 9.5 9.5 None 14.2 14.2 None 16.2 16.1 None PIPE12378 A4 ZPIP12517 3 0 1 CIRCULAR 0.088 RCP 68.4 66.7 None 0.34 126.3 122.2 None 194.2 160.5 None 222.5 171.8 None PIPE12715 A4 ZPIP13279 4.5 0 1 CIRCULAR 0.044 RCP 143.9 143.9 None 0.35 257.0 253.9 None 390.8 342.6 Both Upstream and Downstream 447.3 358.5 Both Upstream and Downstream PIPE12833 A4 ZPIP16986 2 0 1 CIRCULAR 0.085 RCP 23.4 23.5 None 0.36 37.6 37.6 None 55.7 51.8 None 63.2 57.1 None PIPE13352 A4 ZPIP17612 2 0 1 CIRCULAR 0.020 RCP 10.4 10.4 None 0.33 16.7 16.8 None 24.6 24.6 None 27.8 27.6 None PIPE12320 A4 ZPIP12330 3 0 1 CIRCULAR 0.076 RCP 53.8 54.1 None 0.29 101.9 102.6 None 157.8 155.1 Downstream 181.5 158.8 Both Upstream and Downstream PIPE12351 A4 ZPIP12496 3 0 1 CIRCULAR 0.071 RCP 57.8 58.1 None 0.33 108.3 108.5 Downstream 167.5 147.1 Both Upstream and Downstream 192.3 151.8 Both Upstream and Downstream PIPE12620 A4 ZPIP13120 2.5 0 1 CIRCULAR 0.058 RCP 14.3 15.6 None 0.16 186.5 27.2 None 546.6 71.8 None 663.8 84.5 None PIPE12670 A4 ZPIP13232 4 0 1 CIRCULAR 0.033 RCP 83.3 82.2 None 0.31 139.7 133.8 None 210.3 201.9 None 240.0 224.8 None PIPE12754 A4 ZPIP13326 4 0 1 CIRCULAR 0.042 RCP 86.4 86.3 None 0.29 158.3 158.1 None 240.6 241.2 None 276.1 253.5 None PIPE13127 A4 ZPIP11568 5.5 0 1 CIRCULAR 0.002 RCP 45.4 44.8 None 0.32 76.2 75.6 None 117.5 106.1 None 134.8 122.1 None PIPE13216 A4 ZPIP11729 2.5 0 1 CIRCULAR 0.006 RCP 10.3 10.4 None 0.32 16.5 16.6 None 24.4 24.4 None 27.6 27.6 None PIPE12362 A4 ZPIP10111 3 0 1 CIRCULAR 0.078 RCP 47.2 47.4 None 0.25 91.3 91.9 None 141.8 139.7 None 163.6 159.1 Downstream PIPE12613 A4 ZPIP16873 5.5 0 1 CIRCULAR 0.026 RCP 137.7 138.5 None 0.26 277.1 297.2 None 424.1 431.7 Both Upstream and Downstream 470.0 459.2 Both Upstream and Downstream PIPE12699 A4 ZPIP16899 4 0 1 CIRCULAR 0.073 RCP 90.2 90.6 None 0.23 179.5 180.0 None 280.6 281.1 None 323.1 327.9 None PIPE12749 A4 ZPIP13323 4 0 1 CIRCULAR 0.042 RCP 86.4 86.4 None 0.29 158.7 159.1 None 241.0 241.9 None 276.8 250.4 Downstream PIPE12750 A4 ZPIP13324 4 0 1 CIRCULAR 0.042 RCP 86.6 86.5 None 0.29 158.9 159.4 None 241.4 236.7 None 277.3 252.1 Both Upstream and Downstream PIPE12793 A4 ZPIP13475 1.5 0 1 CIRCULAR 0.017 RCP 5.5 1.2 None 0.09 5.3 12.2 Downstream 17.1 12.8 Both Upstream and Downstream 5.7 11.7 Both Upstream and Downstream PIPE12978 A4 ZPIP17187 2.5 0 1 CIRCULAR 0.010 RCP 3.1 3.1 None 0.08 5.3 5.6 None 7.9 23.1 None 9.0 34.7 Both Upstream and Downstream PIPE12983 A4 ZPIP14480 2.5 0 1 CIRCULAR 0.038 RCP 24.1 24.2 None 0.3 40.2 40.2 None 60.1 60.0 None 68.3 67.9 None PIPE13236 A4 ZPIP11756 3 0 1 CIRCULAR 0.103 RCP 62.8 62.9 None 0.29 125.7 125.4 None 196.6 181.8 Upstream 226.7 182.9 Both Upstream and Downstream PIPE13336 A4 ZPIP15914 1.5 0 1 CIRCULAR 0.025 CMP 1.7 1.7 None 0.19 2.7 6.1 None 4.1 7.7 Both Upstream and Downstream 4.7 7.7 Both Upstream and Downstream PIPE13360 A4 ZPIP15973 1.5 0 1 CIRCULAR 0.013 RCP 2.3 2.3 None 0.19 3.6 3.6 None 5.3 5.3 None 6.0 10.2 None PIPE13607 A4 ZPIP12885 3.5 0 1 CIRCULAR 0.038 RCP 50.7 50.7 None 0.26 95.5 95.2 None 146.8 146.3 None 168.9 166.2 Downstream PIPE12319 A4 ZPIP10025 3 0 1 CIRCULAR 0.072 RCP 53.8 54.1 None 0.3 101.9 102.6 None 158.1 149.5 Both Upstream and Downstream 181.8 150.6 Both Upstream and Downstream PIPE12381 A4 ZPIP12521 1.5 0 1 CIRCULAR 0.034 RCP 5.6 5.6 None 0.29 9.4 9.4 None 14.2 14.2 None 16.2 16.3 None PIPE12409 A4 ZPIP12555 4.5 0 1 CIRCULAR 0.031 RCP 154.0 150.7 None 0.43 306.3 236.0 None 482.1 277.6 None 557.9 292.2 None PIPE12630 A4 ZPIP13127 4 0 1 CIRCULAR 0.104 RCP 103.6 104.1 None 0.22 214.7 215.7 None 339.6 338.6 None 392.3 389.0 None PIPE12695 A4 ZPIP13251 4 0 1 CIRCULAR 0.013 RCP 38.5 38.7 None 0.23 76.9 77.3 None 120.2 120.9 None 138.1 139.7 None PIPE12704 A4 ZPIP10511 4.5 0 1 CIRCULAR 0.011 CMP 25.6 25.9 None 0.23 49.2 50.4 None 76.9 80.8 None 88.8 94.3 None PIPE13584 A4 ZPIP17138 1.5 0 1 CIRCULAR 0.042 RCP 8.9 8.9 None 0.41 15.1 16.1 Downstream 22.9 16.8 Both Upstream and Downstream 26.0 18.0 Both Upstream and Downstream PIPE12360 A4 ZPIP12502 3 0 1 CIRCULAR 0.031 RCP 26.2 26.5 None 0.22 53.5 53.9 None 84.2 84.7 None 97.3 97.9 None PIPE12561 A4 ZPIP13045 1.5 0 1 CIRCULAR 0.018 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 11.4 None 0.0 11.7 None CULV10181 A4 ZPIP16854 5 0 1 CIRCULAR 0.047 RCP 79.7 196.2 None 0.35 189.1 343.9 None 224.3 444.5 Upstream 205.0 469.7 Upstream PIPE12612 A4 ZPIP13115 4.5 0 1 CIRCULAR 0.026 RCP 72.3 79.7 None 0.25 144.4 157.5 None 228.2 251.5 None 265.7 265.8 Downstream CULV10201 A4 ZCUL10957 6 12 1 RECT_CLOSED 0.012 RCP 506.9 524.7 None 0.37 830.3 831.8 None 1219.6 1180.6 None 1228.5 1188.0 None PIPE13063 A4 ZPIP15163 3 0 1 CIRCULAR 0.047 RCP 45.8 46.0 None 0.32 73.7 74.0 None 109.2 103.2 None 124.0 120.0 None PIPE13178 A4 ZPIP17479 2 0 1 CIRCULAR 0.019 RCP 9.7 9.7 None 0.31 15.4 15.4 None 22.7 22.7 None 25.7 25.7 None PIPE12333 A4 ZPIP12378 1.5 0 1 CIRCULAR 0.020 RCP 4.6 4.6 None 0.31 7.4 7.4 None 10.8 10.8 None 12.2 12.1 None PIPE12355 A4 ZPIP10110 3 0 1 CIRCULAR 0.070 RCP 55.3 55.1 None 0.31 94.5 92.1 None 142.2 138.6 None 161.4 145.4 None PIPE12629 A4 ZPIP13126 4.5 0 1 CIRCULAR 0.026 RCP 72.8 80.9 None 0.25 145.4 159.1 None 230.1 251.5 Downstream 267.8 262.5 Both Upstream and Downstream PIPE12634 A4 ZPIP13131 3.5 0 1 CIRCULAR 0.071 RCP 72.5 72.5 None 0.27 135.6 135.2 None 206.6 207.0 None 237.8 219.0 None PIPE12721 A4 ZPIP10522 1.5 0 1 CIRCULAR 0.065 RCP 5.1 5.1 None 0.19 11.7 11.7 None 18.9 18.9 None 22.0 21.9 None PIPE13364 A4 ZPIP15979 2 0 1 CIRCULAR 0.015 RCP 10.5 10.4 None 0.38 17.0 16.5 None 25.1 22.7 Both Upstream and Downstream 28.5 22.8 Both Upstream and Downstream PIPE13537 A4 1.5 0 1 CIRCULAR 0.084 HDPE 0.0 0.1 None 0 0.3 0.6 None 0.9 7.8 None 1.2 24.8 None PIPE13599 A4 ZPIP17634 4 0 1 CIRCULAR 0.008 RCP 34.5 38.0 None 0.3 56.9 61.6 None 86.4 91.5 None 98.6 102.7 None PIPE12508 A4 ZPIP16645 6 0 1 CIRCULAR 0.024 RCP 133.5 133.5 None 0.2 247.2 245.9 None 380.1 386.7 None 435.8 525.9 Both Upstream and Downstream PIPE13090 A4 ZPIP15197 5 0 1 CIRCULAR 0.018 RCP 97.9 96.1 None 0.27 174.7 164.8 None 272.8 240.7 None 312.7 285.2 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 49 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE13186 A4 ZPIP17501 5.5 0 1 CIRCULAR 0.002 RCP 48.4 51.2 None 0.31 81.2 81.7 None 124.5 114.8 None 143.9 132.9 None PIPE13480 A4 PIP20023 2 0 1 CIRCULAR 0.005 RCP 1.4 16.5 None 1.05 2.1 17.6 None 3.9 9.2 Both Upstream and Downstream 4.8 12.8 Both Upstream and Downstream PIPE12392 A4 ZPIP12540 1.5 0 1 CIRCULAR 0.010 RCP 3.1 3.1 None 0.3 5.0 5.0 None 7.3 7.3 None 8.3 8.3 None PIPE12474 A4 ZPIP12880 3.5 0 1 CIRCULAR 0.005 RCP 21.6 21.8 None 0.31 34.8 34.5 None 51.3 50.4 None 57.9 57.1 None PIPE12476 A4 ZPIP16786 2.5 0 1 CIRCULAR 0.082 RCP 31.4 31.4 None 0.27 56.8 56.4 None 87.8 80.4 None 100.6 94.0 None PIPE12726 A4 ZPIP13299 3 0 1 CIRCULAR 0.016 RCP 15.6 15.7 None 0.18 36.2 36.2 None 58.4 58.4 None 67.9 67.8 None PIPE13028 A4 ZPIP11388 3 0 1 CIRCULAR 0.045 RCP 30.7 30.7 None 0.22 53.0 53.1 None 81.7 81.7 None 93.8 112.9 Upstream PIPE13106 A4 ZPIP17400 2 0 3 CIRCULAR 0.010 RCP 25.6 25.7 None 0.38 43.4 36.6 None 69.4 51.2 None 80.3 54.7 None PIPE12337 A4 ZPIP12444 2.5 0 1 CIRCULAR 0.054 RCP 23.2 23.3 None 0.24 43.9 43.9 None 67.6 65.9 None 77.6 75.7 None PIPE12680 A4 ZPIP13239 3.5 0 1 CIRCULAR 0.034 RCP 58.8 57.4 None 0.31 98.4 92.4 None 148.9 135.4 None 169.6 146.8 None PIPE12895 A4 ZPIP13839 2 0 1 CIRCULAR 0.006 RCP 3.3 3.3 None 0.18 5.4 5.4 None 8.0 15.1 None 9.1 14.4 Both Upstream and Downstream PIPE13134 A4 ZPIP17415 3.5 0 1 CIRCULAR 0.003 RCP 16.1 15.9 None 0.29 25.7 25.7 None 37.7 39.0 None 42.8 43.1 None PIPE13210 A4 ZPIP15586 2 0 1 CIRCULAR 0.020 PVC 9.3 9.4 None 0.3 15.0 15.0 None 22.1 22.1 None 25.0 25.0 None PIPE13319 A4 ZPIP15789 1.5 0 1 CIRCULAR 0.012 HDPE 3.3 3.3 None 0.3 5.3 5.4 None 7.8 7.9 None 8.8 8.9 None PIPE13486 A4 PIP20026 1.5 0 1 CIRCULAR 0.009 RCP 0.0 8.7 None 0.87 0.0 11.1 Downstream 0.0 6.9 Both Upstream and Downstream 0.0 7.9 Both Upstream and Downstream PIPE13610 A4 4.5 0 1 CIRCULAR 0.041 RCP 76.9 77.3 None 0.19 159.6 160.6 None 242.3 309.5 None 279.6 316.6 Both Upstream and Downstream PIPE12452 A4 ZPIP16753 2 0 1 CIRCULAR 0.039 RCP 14.1 14.1 None 0.32 24.0 23.7 None 35.8 36.0 Upstream 40.7 34.7 Both Upstream and Downstream PIPE12481 A4 ZPIP12887 3.5 0 1 CIRCULAR 0.033 RCP 41.3 41.3 None 0.23 80.0 80.1 None 124.1 124.0 None 143.4 142.8 None PIPE12795 A4 ZPIP13487 5.5 0 1 CIRCULAR 0.035 RCP 217.6 215.3 Downstream 0.34 352.2 363.9 Downstream 522.9 443.8 Both Upstream and Downstream 586.8 491.8 Both Upstream and Downstream PIPE13024 A4 ZPIP11385 2 0 1 CIRCULAR 0.010 RCP 1.0 0.5 None 0.02 1.5 0.6 None 39.0 0.3 None 31.1 17.6 None DTCH10284 A4 1.5 3 1 PARABOLIC 0.225 Concrete 21.7 21.6 None 0.24 40.0 39.9 None 60.8 60.7 None 69.9 69.9 None PIPE12411 A4 ZPIP10140 3 0 1 CIRCULAR 0.119 RCP 71.0 69.0 None 0.3 130.6 126.1 None 200.4 165.2 None 229.5 176.8 None PIPE12574 A4 ZPIP10397 4.5 0 1 CIRCULAR 0.056 RCP 108.2 122.8 None 0.26 244.9 283.4 None 355.8 345.4 Both Upstream and Downstream 403.5 359.1 Both Upstream and Downstream PIPE12616 A4 ZPIP10431 2 0 1 CIRCULAR 0.057 RCP 15.2 15.2 None 0.28 26.3 26.1 None 39.8 41.2 Both Upstream and Downstream 45.5 41.4 Both Upstream and Downstream PIPE12744 A4 ZPIP10535 3.5 0 1 CIRCULAR 0.051 RCP 43.0 43.0 None 0.19 78.7 78.8 None 121.1 121.4 None 141.2 175.5 None PIPE12801 A4 ZPIP13493 2 0 1 CIRCULAR 0.018 RCP 0.0 0.0 None 0 0.0 0.3 None 0.0 15.3 None 0.0 23.2 None PIPE12829 A4 ZPIP16979 1.5 0 1 CIRCULAR 0.010 RCP 1.3 1.3 None 0.13 2.1 2.1 None 3.1 3.2 None 3.5 8.0 None PIPE13195 A4 ZPIP15566 2.5 0 1 CIRCULAR 0.070 RCP 34.2 34.3 None 0.32 54.8 55.0 None 81.2 77.0 None 92.2 83.3 None PIPE13207 A4 ZPIP11724 2.5 0 1 CIRCULAR 0.006 PVC 9.3 9.4 None 0.29 14.5 14.8 None 21.3 21.9 None 55.7 25.1 None PIPE13242 A4 ZPIP15652 2.5 0 1 CIRCULAR 0.100 RCP 31.8 31.9 None 0.25 58.5 58.7 None 89.7 90.1 None 102.8 100.6 Downstream PIPE12332 A4 ZPIP10049 1.5 0 1 CIRCULAR 0.023 RCP 4.6 4.6 None 0.29 7.4 7.4 None 10.8 10.8 None 12.2 12.1 None PIPE12415 A4 ZPIP12575 2.5 0 1 CIRCULAR 0.034 RCP 14.4 14.4 None 0.19 31.6 31.6 None 50.4 50.3 None 58.5 58.2 None PIPE12442 A4 ZPIP10164 1.5 0 1 CIRCULAR 0.029 RCP 4.6 4.6 None 0.26 7.9 7.9 None 11.9 11.9 None 13.5 13.5 None PIPE13004 A4 ZPIP14749 1.5 0 1 CIRCULAR 0.085 RCP 7.5 7.5 None 0.24 13.7 13.7 None 20.3 20.3 None 23.3 23.4 None PIPE13046 A4 ZPIP11397 4 0 1 CIRCULAR 0.029 RCP 66.1 66.1 None 0.27 108.9 108.9 None 162.4 162.4 None 187.3 187.9 None PIPE13154 A4 ZPIP17442 4.5 0 1 CIRCULAR 0.009 RCP 41.5 41.7 None 0.23 77.1 77.3 None 120.0 120.0 None 138.4 138.2 None PIPE13397 A4 ZPIP11967 1.5 0 1 CIRCULAR 0.016 RCP 3.9 3.9 None 0.29 6.2 6.2 None 9.1 9.1 None 10.2 10.2 None PIPE12509 A4 ZPIP16646 6 0 1 CIRCULAR 0.021 RCP 133.6 133.8 None 0.22 247.5 246.8 None 380.4 386.7 None 435.9 463.3 Both Upstream and Downstream PIPE12645 A4 ZPIP13162 3 0 1 CIRCULAR 0.080 RCP 36.9 36.9 None 0.2 66.8 66.8 None 101.3 101.3 None 117.9 142.4 None PIPE12771 A4 ZPIP16927 2.25 0 1 CIRCULAR 0.074 ACP 25.5 25.5 None 0.3 42.6 41.9 Both Upstream and Downstream 64.6 56.2 Both Upstream and Downstream 73.9 63.4 Both Upstream and Downstream PIPE13072 A4 ZPIP15170 2 0 1 CIRCULAR 0.015 RCP 8.4 8.4 None 0.3 13.4 13.4 None 19.7 19.3 None 22.3 20.9 None PIPE13212 A4 ZPIP11726 1.5 0 1 CIRCULAR 0.013 PVC 3.4 3.4 None 0.29 5.4 5.4 None 8.0 7.9 None 9.0 8.9 None PIPE13481 A4 PIP20024 2.5 0 1 CIRCULAR 0.004 RCP 1.9 21.6 None 0.81 3.0 24.5 None 4.8 17.3 Both Upstream and Downstream 6.9 20.0 Both Upstream and Downstream PIPE12464 A4 ZPIP12871 2 0 1 CIRCULAR 0.010 RCP 6.5 6.5 None 0.28 10.3 10.3 None 15.2 15.1 None 17.1 17.2 None PIPE12522 A4 ZPIP16809 6 0 1 CIRCULAR 0.021 RCP 128.4 128.7 None 0.21 237.3 237.4 None 364.1 372.4 None 417.2 455.2 Downstream PIPE13231 A4 ZPIP15644 2.5 0 1 CIRCULAR 0.064 RCP 14.7 14.7 None 0.14 29.6 32.2 None 46.2 68.4 Both Upstream and Downstream 53.3 76.6 Both Upstream and Downstream PIPE13243 A4 ZPIP15653 2.5 0 1 CIRCULAR 0.069 RCP 13.4 13.3 None 0.12 34.1 34.0 None 56.1 60.1 None 65.5 79.9 Upstream PIPE13266 A4 ZPIP15669 2 0 1 CIRCULAR 0.010 RCP 6.1 6.2 None 0.27 10.1 10.1 None 15.0 15.0 None 17.0 17.0 None PIPE13459 A4 ZPIP16587 3 0 1 CIRCULAR 0.033 RCP 23.0 23.0 None 0.19 48.9 49.1 None 77.1 77.1 None 89.5 89.2 None PIPE12466 A4 ZPIP10301 2 0 1 CIRCULAR 0.049 RCP 14.0 14.0 None 0.28 22.2 22.2 None 32.4 32.3 None 36.5 36.5 None PIPE12706 A4 ZPIP13272 1.5 0 1 CIRCULAR 0.023 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 7.6 None 0.0 11.5 None PIPE12748 A4 ZPIP13322 4 0 1 CIRCULAR 0.054 RCP 91.0 90.9 None 0.27 165.9 165.6 None 251.8 238.5 Downstream 289.0 245.5 Both Upstream and Downstream PIPE12913 A4 ZPIP17052 2 0 1 CIRCULAR 0.032 CMP 12.2 15.3 None 0.69 21.1 13.4 Both Upstream and Downstream 31.8 15.7 Both Upstream and Downstream 36.2 16.1 Both Upstream and Downstream PIPE13003 A4 ZPIP14748 1.5 0 1 CIRCULAR 0.093 RCP 7.5 7.5 None 0.23 13.7 13.7 None 20.3 20.3 None 23.3 23.3 None PIPE13135 A4 ZPIP11579 3 0 1 CIRCULAR 0.005 RCP 12.9 13.0 None 0.28 20.6 20.6 None 30.3 30.4 None 34.2 34.1 None PIPE13312 A4 ZPIP11812 3 0 1 CIRCULAR 0.004 HDPE 8.9 8.9 None 0.2 17.9 17.9 None 27.3 27.4 None 31.8 32.1 None PIPE13393 A4 ZPIP17637 3 0 1 CIRCULAR 0.015 RCP 15.4 15.4 None 0.19 32.9 32.9 None 52.1 52.1 None 60.3 60.3 None PIPE12407 A4 ZPIP12553 3 0 1 CIRCULAR 0.058 RCP 33.2 33.3 None 0.21 64.8 64.9 None 100.4 100.3 None 115.6 116.0 None PIPE12445 A4 ZPIP12637 2 0 1 CIRCULAR 0.148 RCP 15.0 15.0 None 0.17 34.1 34.1 None 54.0 54.4 None 62.5 62.7 None PIPE12585 A4 ZPIP10418 2.5 0 1 CIRCULAR 0.026 RCP 0.5 1.7 None 0.03 178.0 6.0 None 530.9 40.7 None 645.5 47.1 None PIPE12804 A4 ZPIP13500 2.5 0 1 CIRCULAR 0.007 RCP 9.2 9.2 None 0.28 14.6 14.5 None 21.4 21.3 None 24.1 24.0 None PIPE12900 A4 ZPIP13841 3 0 1 CIRCULAR 0.014 RCP 23.0 22.9 None 0.29 38.5 35.5 None 57.4 55.5 None 64.8 56.1 Downstream PIPE13019 A4 ZPIP17286 3 0 1 CIRCULAR 0.021 RCP 0.2 0.1 None 0 0.6 0.3 None 6.7 0.4 None 13.7 69.5 None PIPE13351 A4 ZPIP15962 2 0 1 CIRCULAR 0.029 RCP 10.4 10.4 None 0.27 16.7 16.8 None 24.7 24.6 None 27.9 27.7 None PIPE12546 A4 ZPIP13016 1.5 0 1 CIRCULAR 0.010 RCP 2.9 2.9 None 0.28 4.5 4.5 None 6.5 6.5 None 7.3 7.3 None PIPE12619 A4 ZPIP13119 3 0 1 CIRCULAR 0.032 RCP 26.7 27.1 None 0.23 48.3 48.9 None 73.1 73.2 None 84.2 84.9 None PIPE12621 A4 ZPIP13121 5.5 0 1 CIRCULAR 0.041 RCP 136.1 136.9 None 0.2 274.3 275.4 None 431.3 430.1 None 467.1 481.7 Both Upstream and Downstream PIPE12914 A4 ZPIP13887 2 0 1 CIRCULAR 0.059 RCP 11.0 11.0 None 0.2 17.4 17.4 None 25.5 29.2 None 28.8 39.1 None PIPE13226 A4 ZPIP11737 1.5 0 1 CIRCULAR 0.013 RCP 0.0 0.0 None 0 0.0 0.4 None 0.0 8.0 None 0.0 8.5 None FLOW10039 A4 0 0 1 IRREGULAR 0.041 RCP 45.3 40.4 None 0.29 77.9 63.0 None 116.5 87.5 None 132.9 97.7 None PIPE12361 A4 ZPIP12503 3 0 1 CIRCULAR 0.031 RCP 21.4 21.6 None 0.18 44.3 44.7 None 70.1 70.6 None 81.1 81.7 None PIPE12518 A4 ZPIP16803 2 0 1 CIRCULAR 0.008 RCP 4.9 4.9 None 0.24 8.5 8.5 None 12.7 12.8 None 14.4 14.4 None PIPE12623 A4 ZPIP16877 2 0 1 CIRCULAR 0.037 RCP 9.8 9.8 None 0.23 17.6 17.6 None 26.7 26.6 None 30.5 30.4 None PIPE12898 A4 ZPIP10810 1.5 0 1 CIRCULAR 0.005 RCP 0.0 0.0 None 0 0.0 1.0 None 0.0 3.9 Downstream 0.3 5.2 Both Upstream and Downstream PIPE13136 A4 ZPIP11580 2 0 1 CIRCULAR 0.010 RCP 5.9 5.9 None 0.27 9.3 9.4 None 13.8 13.8 None 15.5 15.5 None CULV10218 A4 ZPIP15452 2 5 1 RECT_CLOSED 0.029 RCP 45.7 54.7 None 0.35 73.5 105.5 None 109.3 108.9 Both Upstream and Downstream 124.7 109.8 Both Upstream and Downstream

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 50 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE13258 A4 ZPIP15662 4 0 1 CIRCULAR 0.059 RCP 61.7 61.5 None 0.18 133.3 133.5 None 209.3 210.2 None 241.8 243.1 None PIPE13392 A4 ZPIP11952 4 0 1 CIRCULAR 0.007 RCP 28.7 31.1 None 0.26 47.1 50.2 None 71.4 74.6 None 81.6 84.1 None PIPE13613 A4 ZPIP15591 1.5 0 1 CIRCULAR 0.023 RCP 4.1 4.1 None 0.26 6.7 6.7 None 9.9 9.9 None 11.2 11.2 None PIPE12394 A4 ZPIP12544 2.5 0 1 CIRCULAR 0.070 RCP 20.4 20.5 None 0.19 41.4 41.4 None 64.9 64.8 None 74.9 74.9 None PIPE13167 A4 ZPIP11675 2 0 1 CIRCULAR 0.032 RCP 9.6 9.7 None 0.24 15.4 15.4 None 22.7 23.8 None 25.6 27.8 None PIPE13418 A4 ZPIP16141 2.5 0 1 CIRCULAR 0.010 PVC 10.6 10.7 None 0.26 17.1 17.1 None 25.3 25.1 None 28.5 28.4 None PIPE12420 A4 ZPIP12577 1.5 0 1 CIRCULAR 0.074 RCP 5.6 5.6 None 0.2 9.6 16.2 Downstream 14.3 18.7 Both Upstream and Downstream 16.3 19.4 Both Upstream and Downstream PIPE12494 A4 ZPIP10313 2 0 1 CIRCULAR 0.015 RCP 7.1 7.1 None 0.26 11.2 11.2 None 16.6 16.6 None 18.7 18.6 None PIPE12575 A4 ZPIP10398 2.5 0 1 CIRCULAR 0.023 RCP 13.8 13.9 None 0.22 24.5 24.6 None 37.3 37.3 None 42.6 42.5 None PIPE13035 A4 ZPIP17296 1.5 0 1 CIRCULAR 0.051 RCP 6.0 6.0 None 0.25 9.7 9.7 None 14.2 14.2 None 16.7 16.1 None PIPE12397 A4 ZPIP12546 4 0 1 CIRCULAR 0.027 RCP 39.1 39.0 None 0.16 86.5 86.3 None 143.7 140.0 None 164.6 158.8 None PIPE12475 A4 ZPIP16785 2 0 1 CIRCULAR 0.013 RCP 0.1 0.2 None 0.01 0.3 3.2 None 0.7 11.8 Both Upstream and Downstream 0.8 17.5 Both Upstream and Downstream PIPE12496 A4 ZPIP16792 2 0 1 CIRCULAR 0.015 RCP 7.0 7.0 None 0.25 11.1 11.1 None 16.4 16.4 None 18.6 18.5 None PIPE12505 A4 ZPIP12910 1.5 0 1 CIRCULAR 0.079 RCP 0.6 0.6 None 0.02 0.9 0.9 None 1.4 2.4 None 1.5 19.9 Both Upstream and Downstream PIPE12570 A4 ZPIP19004 1.5 0 1 CIRCULAR 0.081 RCP 0.0 0.0 None 0 14.8 7.0 None 11.1 27.4 Both Upstream and Downstream 8.7 20.1 Both Upstream and Downstream PIPE12796 A4 ZPIP13488 1.5 0 1 CIRCULAR 0.019 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 7.0 None 0.0 9.7 None PIPE12972 A4 ZPIP11129 2.5 0 1 CIRCULAR 0.084 RCP 28.9 28.9 None 0.24 47.8 47.8 None 71.3 75.2 None 81.1 79.1 Downstream PIPE13306 A4 ZPIP11807 2 0 1 CIRCULAR 0.004 HDPE 3.7 3.7 None 0.26 5.9 5.9 None 8.7 8.7 None 9.8 9.8 None PIPE13310 A4 ZPIP17547 3 0 1 CIRCULAR 0.005 HDPE 8.9 8.9 None 0.19 17.9 17.9 None 27.3 27.4 None 31.8 32.1 None PIPE13311 A4 ZPIP11811 3 0 1 CIRCULAR 0.005 HDPE 8.9 8.9 None 0.19 17.9 17.9 None 27.3 27.4 None 31.8 32.1 None PIPE12401 A4 ZPIP12550 4 0 1 CIRCULAR 0.099 RCP 78.9 78.9 None 0.17 162.6 162.3 None 261.3 259.5 None 299.6 296.8 None PIPE12836 A4 ZPIP13604 2 0 1 CIRCULAR 0.024 RCP 8.5 8.5 None 0.24 13.7 13.7 None 20.4 20.0 None 23.0 23.0 None PIPE13099 A4 ZPIP15234 5 0 1 CIRCULAR 0.039 RCP 91.2 91.3 None 0.18 184.4 184.9 None 292.0 293.1 None 338.4 340.9 None PIPE13192 A4 ZPIP11716 1.5 0 1 CIRCULAR 0.010 Unknown 0.0 2.9 None 0.28 0.0 8.0 None 0.0 6.7 Both Upstream and Downstream 0.0 6.9 Both Upstream and Downstream PIPE13194 A4 ZPIP15565 2.5 0 1 CIRCULAR 0.070 RCP 29.4 29.5 None 0.27 47.3 47.4 None 70.2 66.1 None 79.6 71.6 None PIPE13425 A4 ZPIP16149 1.5 0 1 CIRCULAR 0.045 RCP 0.0 4.4 None 0.19 0.0 13.3 None 0.0 13.4 Downstream 0.0 14.8 Both Upstream and Downstream PIPE13458 A4 ZPIP12260 3.5 0 1 CIRCULAR 0.020 RCP 24.9 24.9 None 0.17 52.1 52.2 None 81.4 81.8 None 93.3 94.5 None PIPE13469 A4 PIP16803 2.5 0 1 CIRCULAR 0.076 RCP 20.4 20.5 None 0.18 41.4 41.4 None 64.9 64.8 None 74.9 74.9 None PIPE13606 A4 ZPIP13098 3.5 0 1 CIRCULAR 0.036 RCP 35.5 35.5 None 0.19 69.7 69.6 None 107.5 107.5 None 125.7 125.8 None PIPE12667 A4 ZPIP13227 1.5 0 1 CIRCULAR 0.103 RCP 8.0 8.0 None 0.24 13.2 13.2 None 19.6 21.1 None 22.2 22.0 Downstream PIPE12755 A4 ZPIP13327 1.5 0 1 CIRCULAR 0.019 RCP 1.2 1.2 None 0.08 1.8 1.9 None 2.7 8.0 Downstream 3.0 9.5 Both Upstream and Downstream PIPE12764 A4 ZPIP13353 1.5 0 1 CIRCULAR 0.090 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 26.0 Downstream 0.0 20.6 Both Upstream and Downstream PIPE12822 A4 ZPIP16970 2.5 0 1 CIRCULAR 0.115 RCP 34.7 34.7 None 0.25 55.6 55.8 None 82.3 94.3 Both Upstream and Downstream 93.1 90.5 Both Upstream and Downstream PIPE12824 A4 ZPIP10652 1.5 0 1 CIRCULAR 0.010 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 6.6 None 0.0 6.7 None PIPE12922 A4 ZPIP14165 4.5 0 1 CIRCULAR 0.015 RCP 47.6 48.0 None 0.2 87.3 87.4 None 136.2 135.1 None 156.5 155.4 None PIPE13246 A4 ZPIP11759 2.5 0 1 CIRCULAR 0.104 RCP 26.1 26.2 None 0.2 49.2 49.3 None 75.9 75.6 None 87.2 86.1 None PIPE13265 A4 ZPIP11766 3.5 0 1 CIRCULAR 0.020 RCP 22.8 22.8 None 0.16 50.4 50.4 None 79.3 79.4 None 91.6 91.9 None PIPE13347 A4 ZPIP17609 3 0 1 CIRCULAR 0.005 RCP 11.7 11.8 None 0.25 19.0 19.0 None 27.8 32.4 None 31.0 30.4 Both Upstream and Downstream PIPE12457 A4 ZPIP12847 1.5 0 1 CIRCULAR 0.006 RCP 0.0 0.1 None 0.01 0.1 6.2 None 0.1 5.5 Both Upstream and Downstream 0.1 5.3 Both Upstream and Downstream PIPE12482 A4 ZPIP16787 2.5 0 1 CIRCULAR 0.021 CIPCP 12.5 12.5 None 0.24 19.9 20.0 None 29.4 29.4 None 33.2 33.2 None PIPE12510 A4 ZPIP12912 1.5 0 1 CIRCULAR 0.220 RCP 4.8 4.8 None 0.1 9.8 9.8 None 15.2 16.4 None 17.5 31.4 Both Upstream and Downstream PIPE12642 A4 ZPIP16888 2 0 1 CIRCULAR 0.026 RCP 7.9 7.9 None 0.22 13.6 13.6 None 20.8 20.7 None 23.7 23.7 None PIPE12932 A4 ZPIP11035 3.5 0 1 CIRCULAR 0.056 RCP 63.9 64.2 None 0.27 102.3 102.4 None 151.6 146.8 None 171.6 152.7 Downstream PIPE13005 A4 ZPIP14750 5 0 1 CIRCULAR 0.038 RCP 87.4 87.4 None 0.17 178.1 178.5 None 281.3 282.1 None 326.0 328.0 None CULV10197 A4 ZCUL12349 6 12 1 RECT_CLOSED 0.023 RCP 522.8 537.2 None 0.27 856.0 859.0 None 1195.9 1230.6 None 1212.9 1267.4 None CULV10207 A4 ZCUL12350 4 9 1 RECT_CLOSED 0.005 RCP 65.6 66.1 None 0.19 108.5 109.5 None 164.4 164.1 None 183.6 218.2 None PIPE13097 A4 ZPIP15232 5.5 0 1 CIRCULAR 0.059 RCP 216.6 218.0 None 0.27 351.3 352.7 None 523.7 467.6 Downstream 588.6 520.9 Downstream PIPE12406 A4 ZPIP12552 4 0 1 CIRCULAR 0.106 RCP 78.8 78.8 None 0.17 162.5 162.3 None 261.3 257.3 None 299.7 294.1 None PIPE12447 A4 ZPIP12662 4 0 1 CIRCULAR 0.281 RCP 145.8 146.6 None 0.19 289.3 288.3 None 453.5 442.4 Downstream 518.8 477.4 Downstream PIPE12448 A4 ZPIP12663 4 0 1 CIRCULAR 0.129 RCP 97.2 97.7 None 0.19 194.9 195.6 None 309.1 301.2 None 352.8 325.0 None PIPE12681 A4 ZPIP13240 3.5 0 1 CIRCULAR 0.056 RCP 59.4 58.1 None 0.24 99.8 93.5 None 150.5 136.9 None 171.3 148.5 None PIPE12893 A4 ZPIP13834 2.5 0 1 CIRCULAR 0.005 RCP 6.5 6.5 None 0.22 11.1 11.1 None 17.0 19.8 Downstream 19.5 19.0 Both Upstream and Downstream PIPE12980 A4 ZPIP14477 2.5 0 1 CIRCULAR 0.070 RCP 24.1 24.1 None 0.22 40.2 40.2 None 60.1 60.4 None 68.4 67.8 None PIPE13198 A4 ZPIP11718 2 0 1 CIRCULAR 0.055 RCP 12.1 12.2 None 0.23 19.3 19.4 None 28.5 28.1 None 32.3 33.6 None PIPE13203 A4 ZPIP15580 2 0 1 CIRCULAR 0.031 PVC 9.4 9.4 None 0.24 15.0 15.0 None 22.2 22.2 None 25.1 25.1 None PIPE13281 A4 ZPIP11790 2 0 1 CIRCULAR 0.009 HDPE 5.1 5.1 None 0.23 8.1 8.1 None 12.0 12.0 None 13.6 13.6 None PIPE13321 A4 ZPIP15791 4.5 0 1 CIRCULAR 0.003 RCP 35.9 30.3 None 0.27 58.5 47.0 None 84.2 64.0 None 94.4 71.0 None PIPE13419 A4 ZPIP16142 2.5 0 1 CIRCULAR 0.010 PVC 9.6 9.6 None 0.23 15.4 15.4 None 22.9 22.9 None 25.9 25.9 None PIPE13420 A4 ZPIP16143 2.5 0 1 CIRCULAR 0.010 PVC 9.6 9.6 None 0.23 15.4 15.4 None 22.8 22.9 None 25.9 25.9 None PIPE13487 A4 PIP10075 6 0 1 CIRCULAR 0.019 RCP 109.5 109.6 None 0.19 206.8 207.1 None 319.2 318.9 None 366.6 366.0 None PIPE12348 A4 ZPIP12493 3 0 1 CIRCULAR 0.057 RCP 26.2 26.4 None 0.17 53.4 53.8 None 84.1 84.6 None 97.2 97.8 None PIPE12402 A4 ZPIP12551 4 0 1 CIRCULAR 0.133 RCP 97.1 97.7 None 0.19 194.8 195.5 None 308.9 300.2 None 352.6 326.1 None PIPE12567 A4 ZPIP13050 7 0 1 CIRCULAR 0.012 RCP 182.2 183.5 None 0.26 317.1 388.9 None 468.7 429.2 Both Upstream and Downstream 564.8 443.6 Both Upstream and Downstream PIPE12697 A4 ZPIP13254 3.5 0 1 CIRCULAR 0.088 RCP 51.0 51.2 None 0.17 102.1 102.4 None 159.2 159.5 None 183.4 184.0 None PIPE12728 A4 ZPIP10524 3 0 1 CIRCULAR 0.022 RCP 11.6 11.6 None 0.12 31.3 31.4 None 52.5 52.4 None 61.6 61.6 None PIPE12849 A4 ZPIP10700 3.5 0 1 CIRCULAR 0.060 RCP 64.0 64.4 None 0.26 102.5 102.3 None 151.9 137.4 Downstream 172.0 152.2 Both Upstream and Downstream PIPE13020 A4 ZPIP17287 1.5 0 1 CIRCULAR 0.033 RCP 0.0 0.0 None 0 0.2 0.1 None 11.3 0.5 None 42.5 11.8 None PIPE13250 A4 ZPIP15657 2.5 0 1 CIRCULAR 0.051 RCP 15.5 15.6 None 0.17 31.9 31.9 None 50.2 50.0 None 58.1 57.3 None PIPE13305 A4 ZPIP11806 2 0 1 CIRCULAR 0.005 HDPE 3.7 3.7 None 0.24 6.0 6.0 None 8.7 8.7 None 9.8 9.8 None PIPE13422 A4 ZPIP12006 1.5 0 1 CIRCULAR 0.010 PVC 2.5 2.5 None 0.25 4.0 4.0 None 5.8 5.8 None 6.5 6.4 None PIPE13488 A4 PIP10076 6 0 1 CIRCULAR 0.019 RCP 107.6 107.7 None 0.18 203.8 203.9 None 314.6 314.6 None 361.2 361.1 None PIPE12586 A4 ZPIP13097 3 0 1 CIRCULAR 0.018 RCP 17.5 17.6 None 0.2 30.6 32.0 None 57.8 62.0 Both Upstream and Downstream 72.2 54.5 Both Upstream and Downstream PIPE12719 A4 ZPIP16904 3 0 1 CIRCULAR 0.020 RCP 10.8 10.8 None 0.11 29.6 29.6 None 49.6 49.8 None 58.2 58.4 None PIPE12735 A4 ZPIP10527 3 0 1 CIRCULAR 0.018 RCP 13.3 13.4 None 0.15 29.4 29.4 None 46.8 46.3 None 54.3 53.7 None PIPE12745 A4 ZPIP13319 6 0 1 CIRCULAR 0.024 RCP 169.1 171.5 None 0.26 298.9 296.1 None 454.3 387.0 None 521.1 402.2 None PIPE13086 A4 ZPIP17373 1.5 0 1 CIRCULAR 0.023 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 6.0 None 0.0 9.6 None

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 51 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE13188 A4 ZPIP11708 5 0 1 CIRCULAR 0.002 RCP 36.5 38.7 None 0.36 60.1 50.1 None 87.3 60.5 None 98.0 65.6 None PIPE13292 A4 ZPIP11795 2.5 0 1 CIRCULAR 0.025 HDPE 14.5 14.7 None 0.23 23.4 23.6 None 34.7 34.9 None 39.4 39.3 None PIPE13303 A4 ZPIP17544 2 0 1 CIRCULAR 0.032 HDPE 5.4 5.5 None 0.14 8.7 8.7 None 12.7 12.7 None 14.3 24.6 None PIPE13304 A4 ZPIP11805 2 0 1 CIRCULAR 0.005 HDPE 3.7 3.7 None 0.23 5.9 5.9 None 8.6 8.6 None 9.7 9.7 None CULV10236 A4 CUL16810D 8 0 2 CIRCULAR 0.005 SRP 435.1 320.6 None 0.24 755.9 490.1 None 1004.9 766.7 None 2354.0 817.3 None PIPE12446 A4 ZPIP12638 2.5 0 1 CIRCULAR 0.134 RCP 20.9 20.8 None 0.14 47.6 47.6 None 75.9 76.6 None 88.1 90.6 None PIPE12569 A4 ZPIP19003 2.5 0 1 CIRCULAR 0.043 RCP 17.5 17.6 None 0.21 30.5 30.6 None 46.1 48.3 Downstream 52.6 51.0 Downstream PIPE12675 A4 ZPIP13235 2 0 1 CIRCULAR 0.015 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 11.0 None 0.0 16.4 None PIPE12730 A4 ZPIP13302 3.5 0 1 CIRCULAR 0.091 RCP 49.9 50.0 None 0.17 100.2 100.4 None 156.7 157.1 None 180.6 181.3 None PIPE12773 A4 ZPIP10564 3 0 1 CIRCULAR 0.015 RCP 16.2 16.2 None 0.2 27.6 27.7 None 42.3 42.2 None 48.4 48.3 None PIPE12814 A4 ZPIP16960 1.5 0 1 CIRCULAR 0.019 RCP 3.4 3.4 None 0.23 5.3 5.3 None 7.8 7.7 None 8.7 8.7 None PIPE13017 A4 ZPIP14945 1.5 0 1 CIRCULAR 0.013 RCP 0.7 0.3 None 0.02 2.1 0.3 None 10.2 0.1 None 15.1 7.2 None PIPE13078 A4 ZPIP11509 3.5 0 1 CIRCULAR 0.030 RCP 41.6 41.7 None 0.24 67.0 66.7 None 100.0 94.9 None 113.5 105.1 None PIPE13092 A4 ZPIP11524 4.5 0 1 CIRCULAR 0.016 RCP 45.4 45.6 None 0.18 83.5 83.7 None 129.6 129.6 None 149.3 149.1 None PIPE13267 A4 ZPIP15670 2 0 1 CIRCULAR 0.011 RCP 5.1 5.1 None 0.22 8.3 8.4 None 12.5 12.4 None 14.1 14.1 None PIPE13355 A4 ZPIP11915 1.5 0 1 CIRCULAR 0.044 RCP 5.1 5.1 None 0.23 8.2 8.2 None 12.0 11.9 None 13.6 13.2 None PIPE13446 A4 ZPIP12243 3.5 0 1 CIRCULAR 0.097 RCP 35.2 35.2 None 0.11 70.3 70.4 None 108.9 116.9 None 124.5 187.0 None PIPE13489 A4 PIP10077 6 0 1 CIRCULAR 0.019 RCP 104.3 104.4 None 0.18 198.4 198.6 None 306.5 306.7 None 352.1 352.3 None PIPE13490 A4 PIP10128 6 0 1 CIRCULAR 0.019 RCP 104.1 104.1 None 0.18 197.5 197.7 None 305.0 305.3 None 350.4 350.8 None PIPE12562 A4 ZPIP13046 1.5 0 1 CIRCULAR 0.018 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 8.4 None PIPE12707 A4 ZPIP13273 5.5 0 1 CIRCULAR 0.040 RCP 106.3 106.8 None 0.16 219.6 220.6 None 349.3 350.9 None 397.1 399.4 Both Upstream and Downstream PIPE12757 A4 ZPIP10539 2 0 1 CIRCULAR 0.009 RCP 0.2 0.2 None 0.01 0.2 0.5 None 0.4 2.8 None 0.4 12.3 Both Upstream and Downstream PIPE13039 A4 ZPIP11394 4.5 0 1 CIRCULAR 0.006 RCP 36.0 30.7 None 0.2 58.6 47.6 None 93.1 68.6 None 103.5 89.5 None PIPE13040 A4 ZPIP11395 4.5 0 1 CIRCULAR 0.006 RCP 36.1 30.5 None 0.2 58.6 47.3 None 90.3 70.6 None 112.3 90.1 None PIPE13091 A4 ZPIP11523 4.5 0 1 CIRCULAR 0.016 RCP 44.4 44.6 None 0.18 81.9 82.1 None 127.3 127.3 None 146.7 146.5 None PIPE13118 A4 ZPIP11561 3.5 0 1 CIRCULAR 0.008 RCP 24.4 24.6 None 0.28 41.6 34.3 None 67.0 48.8 None 78.0 52.4 None PIPE13187 A4 ZPIP11707 5 0 1 CIRCULAR 0.002 RCP 35.8 36.8 None 0.34 58.3 48.6 None 84.6 58.6 None 95.1 63.8 None PIPE13193 A4 ZPIP15563 1.5 0 1 CIRCULAR 0.010 Unknown 0.0 7.2 None 0.71 0.0 8.5 Downstream 0.0 5.8 Both Upstream and Downstream 0.0 6.1 Both Upstream and Downstream PIPE13211 A4 ZPIP15587 1.5 0 1 CIRCULAR 0.021 PVC 3.4 3.4 None 0.22 5.4 5.4 None 8.0 7.9 None 9.0 8.9 None PIPE12340 A4 ZPIP12461 2 0 1 CIRCULAR 0.010 RCP 3.5 3.5 None 0.15 6.7 6.7 None 10.4 10.3 None 12.0 13.4 None PIPE12527 A4 ZPIP12986 2 0 1 CIRCULAR 0.009 RCP 4.4 4.4 None 0.21 7.2 7.2 None 10.8 10.6 None 12.2 12.0 None PIPE12529 A4 ZPIP16812 5.5 0 1 CIRCULAR 0.040 RCP 105.0 105.4 None 0.16 217.1 218.1 None 342.8 347.5 None 394.1 392.5 Downstream PIPE13302 A4 ZPIP17543 2 0 1 CIRCULAR 0.035 HDPE 5.4 5.5 None 0.13 8.7 8.7 None 12.7 12.7 None 14.3 24.7 None PIPE13247 A4 ZPIP11760 2.5 0 1 CIRCULAR 0.117 RCP 24.0 24.1 None 0.17 45.8 45.9 None 70.9 70.5 None 81.6 80.5 None PIPE13371 A4 ZPIP11925 2.5 0 1 CIRCULAR 0.038 RCP 15.3 15.3 None 0.19 24.5 24.3 None 36.4 35.2 None 41.3 45.5 None PIPE12920 A4 ZPIP14162 3.5 0 1 CIRCULAR 0.041 RCP 49.7 48.0 None 0.23 86.0 74.4 None 130.6 104.3 None 149.4 114.5 None PIPE13015 A4 ZPIP14760 2 0 1 CIRCULAR 0.040 RCP 2.6 2.5 None 0.06 5.0 22.7 None 7.7 22.4 Both Upstream and Downstream 8.7 25.2 Both Upstream and Downstream PIPE13044 A4 ZPIP14973 4 0 1 CIRCULAR 0.010 RCP 0.2 0.1 None 0 0.4 0.2 None 9.8 49.1 Upstream 10.9 80.1 Upstream PIPE13280 A4 ZPIP17530 1.75 0 1 CIRCULAR 0.024 HDPE 5.1 5.1 None 0.21 8.1 8.1 None 12.1 12.0 None 13.6 13.6 None PIPE13483 A4 PIP20030 1.5 0 1 CIRCULAR 0.050 RCP 0.0 17.8 None 0.75 0.0 20.7 Both Upstream and Downstream 0.0 13.3 Both Upstream and Downstream 0.2 13.2 Both Upstream and Downstream PIPE13566 A4 1.5 0 1 CIRCULAR 0.005 RCP 0.1 0.1 None 0.01 0.1 0.1 None 0.2 1.1 None 0.2 4.2 None PIPE13579 A4 ZPIP10510 2 0 1 CIRCULAR 0.026 RCP 7.2 7.2 None 0.2 11.9 11.9 None 17.8 17.9 None 20.3 20.4 None PIPE12346 A4 ZPIP12486 2 0 1 CIRCULAR 0.010 RCP 3.5 3.5 None 0.16 6.7 6.7 None 10.4 10.4 None 12.0 12.2 None PIPE12435 A4 ZPIP12596 2.5 0 1 CIRCULAR 0.090 RCP 17.8 17.8 None 0.14 37.1 37.1 None 58.6 58.4 None 67.7 67.5 None PIPE12471 A4 ZPIP10304 2 0 1 CIRCULAR 0.010 RCP 4.6 4.7 None 0.21 7.5 7.5 None 11.0 11.1 None 12.5 12.5 None PIPE12531 A4 ZPIP13003 2 0 1 CIRCULAR 0.009 RCP 4.4 4.4 None 0.2 7.3 7.2 None 10.8 10.6 None 12.3 12.1 None PIPE12908 A4 ZPIP13854 1.5 0 1 CIRCULAR 0.131 RCP 10.8 10.7 None 0.28 18.8 18.4 Downstream 28.4 21.3 Both Upstream and Downstream 32.4 21.1 Both Upstream and Downstream PIPE12931 A4 ZPIP11034 2 0 1 CIRCULAR 0.044 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 20.0 None 0.0 26.2 None PIPE12987 A4 ZPIP14738 2 0 1 CIRCULAR 0.040 RCP 2.6 2.6 None 0.06 4.9 16.8 None 7.6 20.5 Downstream 8.8 24.7 Both Upstream and Downstream PIPE13061 A4 ZPIP15161 2 0 1 CIRCULAR 0.006 RCP 0.0 0.0 None 0 0.0 0.2 None 0.1 0.4 None 0.1 9.8 None PIPE13438 A4 ZPIP16548 1.5 0 1 CIRCULAR 0.042 RCP 0.0 0.0 None 0 0.0 9.0 None 0.0 11.2 Both Upstream and Downstream 0.0 11.8 Both Upstream and Downstream PIPE12437 A4 ZPIP12599 2.5 0 1 CIRCULAR 0.094 RCP 17.8 17.8 None 0.14 37.1 37.1 None 58.5 58.4 None 67.7 67.5 None PIPE12441 A4 ZPIP12605 2 0 1 CIRCULAR 0.061 RCP 5.1 5.1 None 0.09 11.5 11.5 None 18.4 18.4 None 21.5 30.0 None PIPE13202 A4 ZPIP15573 1.5 0 1 CIRCULAR 0.010 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.4 None 0.0 5.7 None PIPE13372 A4 ZPIP11926 2.5 0 1 CIRCULAR 0.008 RCP 7.8 7.8 None 0.22 12.7 12.4 None 19.2 18.0 None 21.9 19.4 None PIPE13482 A4 PIP20025 1.5 0 1 CIRCULAR 0.075 RCP 4.8 13.9 None 0.48 8.8 16.5 None 13.5 12.7 Both Upstream and Downstream 15.5 15.5 Both Upstream and Downstream PIPE13484 A4 PIP20031 1.5 0 1 CIRCULAR 0.066 RCP 0.0 20.0 None 0.74 0.1 18.3 Upstream 0.2 14.7 Both Upstream and Downstream 0.4 14.5 Both Upstream and Downstream PIPE12428 A4 ZPIP12583 1.5 0 1 CIRCULAR 0.056 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 12.1 None 0.0 13.1 Both Upstream and Downstream PIPE12583 A4 ZPIP10416 2.5 0 1 CIRCULAR 0.075 RCP 3.0 4.3 None 0.04 179.4 9.3 None 533.6 46.2 None 648.3 59.9 None PIPE12607 A4 ZPIP10427 1.5 0 1 CIRCULAR 0.052 RCP 4.9 4.9 None 0.2 103.2 7.8 None 27.0 11.2 None 24.2 12.6 None PIPE12747 A4 ZPIP13321 1.5 0 1 CIRCULAR 0.065 RCP 1.6 1.3 None 0.05 2.9 1.9 None 4.4 13.6 Both Upstream and Downstream 4.8 14.1 Both Upstream and Downstream PIPE12819 A4 ZPIP16964 2.5 0 1 CIRCULAR 0.015 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 19.4 Downstream 0.0 26.6 Both Upstream and Downstream PIPE13162 A4 ZPIP15454 3 0 1 CIRCULAR 0.005 RCP 11.7 11.8 None 0.24 18.7 18.6 None 24.9 29.5 None 26.2 25.8 Both Upstream and Downstream PIPE13354 A4 ZPIP17614 1.5 0 1 CIRCULAR 0.056 RCP 5.1 5.1 None 0.2 8.2 8.2 None 12.0 11.9 None 13.6 13.2 None PIPE13424 A4 ZPIP16148 2 0 1 CIRCULAR 0.026 RCP 0.0 8.3 None 0.23 0.0 18.8 None 0.0 19.8 Both Upstream and Downstream 0.0 19.1 Both Upstream and Downstream PIPE13520 A4 2.5 0 1 CIRCULAR 0.030 RCP 12.9 12.9 None 0.18 22.0 22.0 None 33.3 33.3 None 38.1 38.1 None PIPE13530 A4 3.5 0 1 CIRCULAR 0.048 RCP 43.6 44.0 None 0.2 70.8 70.8 None 105.3 103.0 None 119.5 115.8 None PIPE13582 A4 ZPIP17137 1.5 0 1 CIRCULAR 0.035 RCP 2.6 2.6 None 0.13 4.5 10.8 Both Upstream and Downstream 6.9 10.7 Both Upstream and Downstream 7.9 10.4 Both Upstream and Downstream PIPE13587 A4 2.5 0 1 CIRCULAR 0.019 RCP 15.5 20.9 None 0.37 26.1 22.7 Both Upstream and Downstream 39.6 27.6 Both Upstream and Downstream 41.2 29.9 Both Upstream and Downstream PIPE12352 A4 ZPIP12497 1.5 0 1 CIRCULAR 0.043 RCP 2.8 2.8 None 0.13 4.5 4.5 None 6.6 6.5 Downstream 7.4 11.2 Downstream PIPE12393 A4 ZPIP12543 2.5 0 1 CIRCULAR 0.091 RCP 16.7 16.7 None 0.13 35.3 35.3 None 55.8 55.7 None 64.6 64.4 None PIPE12436 A4 ZPIP12598 2.5 0 1 CIRCULAR 0.101 RCP 17.8 17.8 None 0.14 37.1 37.1 None 58.6 58.4 None 67.7 67.5 None PIPE12511 A4 ZPIP12913 3.5 0 1 CIRCULAR 0.018 RCP 26.1 26.3 None 0.2 42.2 42.2 None 62.5 61.6 None 70.9 69.6 None PIPE12552 A4 ZPIP13021 2 0 1 CIRCULAR 0.009 RCP 4.3 4.3 None 0.2 6.9 6.9 None 10.0 10.0 None 11.3 11.3 None PIPE12979 A4 ZPIP11132 1.5 0 1 CIRCULAR 0.066 RCP 3.1 3.1 None 0.11 5.2 5.2 None 7.9 13.1 None 9.0 14.1 Downstream PIPE13014 A4 ZPIP11287 2 0 1 CIRCULAR 0.015 RCP 0.0 0.0 None 0 0.0 14.2 None 0.0 17.2 None 0.0 14.4 Downstream

APPENDIX E
EXISTING CONDUITS: SUMMARY TABLE
City of San Marcos Drainage Master Plan 52 of 86 April 2019 Facility ID SubWatershed Original
FacilityID
D' or H'
(diameter) or
(height)
B' (width) Barrels Shape Slope
(ft/ft) Material Q2
(cfs)
Qcon
(2-year)
(cfs)
Surcharging
(2-year) Qcon vs Qcap Q10 (cfs)
Qcon
(10-year)
(cfs)
Surcharging
(10-year) Q50
(cfs)
Qcon
(50-year)
(cfs)
Surcharging
(50-year)
Q100
(cfs)
Qcon
(100-
year)
(cfs)
Surcharging
(100-year)
Conveyance Info
Existing Condition Storm Conveyance Results Summary Table Dimensions 2-year 10-year 50-year 100-year
PIPE13163 A4 ZPIP15455 3 0 1 CIRCULAR 0.005 RCP 11.7 11.8 None 0.25 18.9 19.0 None 26.7 27.6 None 28.2 24.5 Both Upstream and Downstream PIPE13257 A4 ZPIP11763 4.5 0 1 CIRCULAR 0.064 RCP 67.5 67.3 None 0.13 143.3 143.5 None 224.6 225.3 None 259.3 260.3 None PIPE13561 A4 4.5 0 1 CIRCULAR 0.059 RCP 60.7 60.9 None 0.13 114.7 114.3 None 186.3 250.7 None 220.1 247.7 None PIPE12576 A4 ZPIP13061 2 0 1 CIRCULAR 0.069 RCP 9.8 9.8 None 0.17 17.6 17.6 None 26.7 26.7 None 30.5 30.5 None PIPE12649 A4 ZPIP10478 3 0 1 CIRCULAR 0.033 RCP 18.3 18.5 None 0.15 34.6 34.6 None 52.5 52.4 None 60.7 61.6 None PIPE12689 A4 ZPIP13247 3 0 1 CIRCULAR 0.020 RCP 8.3 8.3 None 0.09 19.6 19.6 None 31.6 31.7 None 36.8 47.3 None PIPE12807 A4 ZPIP13503 2 0 1 CIRCULAR 0.044 RCP 9.2 9.2 None 0.2 14.6 14.6 None 21.4 21.4 None 24.2 24.1 None PIPE13320 A4 ZPIP15790 4.5 0 1 CIRCULAR 0.005 RCP 35.9 30.2 None 0.22 58.5 46.9 None 84.1 63.9 None 94.4 70.9 None PIPE13533 A4 3.5 0 1 CIRCULAR 0.029 RCP 31.9 32.1 None 0.19 51.7 51.9 None 76.7 76.2 None 87.1 87.6 None PIPE13598 A4 2.5 0 1 CIRCULAR 0.064 RCP 19.4 19.5 None 0.19 31.2 31.4 None 46.3 46.6 None 52.6 52.8 None PIPE12341 A4 ZPIP12470 3 0 1 CIRCULAR 0.038 RCP 16.8 17.0 None 0.13 35.5 35.8 None 56.3 56.8 None 65.3 65.7 None PIPE12386 A4 ZPIP12535 1.5 0 1 CIRCULAR 0.315 RCP 10.3 10.3 None 0.18 17.3 17.1 None 25.8 26.1 None 29.3 29.3 Downstream PIPE12389 A4 ZPIP16719 3 0 1 CIRCULAR 0.039 RCP 16.8 17.0 None 0.13 35.4 35.7 None 56.2 56.6 None 65.1 65.6 None PIPE12485 A4 ZPIP10309 3 0 1 CIRCULAR 0.095 RCP 37.1 37.1 None 0.18 65.6 65.2 None 100.7 92.1 None 115.1 102.8 None PIPE12507 A4 ZPIP10320 1.5 0 1 CIRCULAR 0.222 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 2.0 None 0.0 25.0 Both Upstream and Downstream PIPE12834 A4 ZPIP16990 1.5 0 1 CIRCULAR 0.021 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 4.5 None 0.0 7.6 Downstream PIPE13093 A4 ZPIP11539 2.5 0 1 CIRCULAR 0.018 RCP 10.4 10.4 None 0.19 16.7 16.9 None 24.8 24.7 None 28.0 27.8 None PIPE13318 A4 ZPIP15788 1.5 0 1 CIRCULAR 0.008 HDPE 1.7 1.7 None 0.18 2.7 2.8 None 4.1 4.1 None 4.6 4.7 None PIPE12729 A4 ZPIP13301 3.5 0 1 CIRCULAR 0.075 RCP 33.8 33.9 None 0.12 73.4 73.6 None 116.7 116.8 None 135.1 135.7 None PIPE13041 A4 ZPIP14968 4.5 0 1 CIRCULAR 0.006 RCP 35.9 30.5 None 0.2 58.5 47.3 None 86.3 64.2 None 98.6 74.9 None PIPE13183 A4 ZPIP17494 1.5 0 1 CIRCULAR 0.030 RCP 3.1 3.1 None 0.17 5.3 5.3 None 7.9 7.9 None 9.0 9.0 None PIPE13493 A4 PIP10252 5 0 1 CIRCULAR 0.026 RCP 60.1 60.1 None 0.14 115.8 115.8 None 177.9 178.1 None 205.9 206.3 None PIPE13494 A4 PIP10253 5 0 1 CIRCULAR 0.026 RCP 60.1 60.2 None 0.14 115.9 115.8 None 177.9 178.2 None 205.9 206.2 None PIPE12330 A4 ZPIP16704 3 0 1 CIRCULAR 0.354 RCP 77.5 75.0 None 0.19 141.0 135.6 None 215.5 176.5 None 247.0 189.2 None PIPE12342 A4 ZPIP12473 2.5 0 1 CIRCULAR 0.052 RCP 14.3 14.4 None 0.15 26.7 26.7 None 41.1 38.8 None 47.1 44.5 None PIPE12632 A4 ZPIP16880 2 0 1 CIRCULAR 0.095 RCP 10.9 10.9 None 0.16 18.8 18.8 None 28.7 28.7 None 32.8 33.6 None PIPE12725 A4 ZPIP13298 4 0 1 CIRCULAR 0.015 RCP 19.5 19.6 None 0.11 45.1 45.2 None 72.7 72.7 None 84.6 84.5 None PIPE12981 A4 ZPIP14478 2.5 0 1 CIRCULAR 0.019 RCP 9.5 9.6 None 0.17 16.1 16.1 None 24.0 23.9 None 27.3 27.0 None PIPE13059 A4 ZPIP15159 2 0 1 CIRCULAR 0.024 RCP 2.3 2.3 None 0.07 3.6 3.6 None 5.3 9.1 None 6.0 16.6 None PIPE13142 A4 ZPIP17417 2 0 1 CIRCULAR 0.008 RCP 3.8 3.8 None 0.19 6.0 6.0 None 8.8 8.8 None 9.9 10.0 None PIPE13263 A4 ZPIP15667 4 0 1 CIRCULAR 0.055 RCP 44.6 44.6 None 0.13 90.7 90.8 None 141.7 141.7 None 163.6 163.8 None PIPE13363 A4 ZPIP15978 2 0 1 CIRCULAR 0.015 RCP 0.0 0.2 None 0.01 0.1 0.5 None 0.4 14.2 Downstream 0.5 13.4 Both Upstream and Downstream PIPE13388 A4 ZPIP16042 4 0 1 CIRCULAR 0.035 RCP 43.9 48.8 None 0.18 71.8 78.7 None 108.4 116.5 None 123.4 130.9 None PIPE13448 A4 ZPIP12245 1.5 0 1 CIRCULAR 0.069 RCP 3.8 3.8 None 0.14 7.3 7.3 None 11.4 11.4 None 13.2 13.2 None PIPE13464 A4 ZPIP16592 3.5 0 1 CIRCULAR 0.038 RCP 24.9 24.9 None 0.13 52.2 52.3 None 81.6 82.1 None 93.4 94.8 None PIPE12579 A4 ZPIP16856 4 0 1 CIRCULAR 0.125 RCP 77.2 77.1 None 0.15 142.6 144.9 None 216.7 226.0 None 249.0 236.3 None PIPE12955 A4 ZPIP17178 1.5 0 1 CIRCULAR 0.016 RCP 0.0 0.0 None 0 0.0 6.7 None 0.0 7.8 Both Upstream and Downstream 0.0 6.2 Both Upstream and Downstream PIPE12957 A4 ZPIP17180 2 0 1 CIRCULAR 0.035 RCP 6.4 6.4 None 0.15 10.2 12.6 Downstream 15.1 18.9 Both Upstream and Downstream 17.0 20.1 Both Upstream and Downstream PIPE13164 A4 ZPIP15456 3 0 1 CIRCULAR 0.005 RCP 10.4 10.5 None 0.22 16.9 17.0 None 25.1 28.0 None 28.3 22.3 Downstream PIPE13270 A4 ZPIP15673 2 0 1 CIRCULAR 0.010 RCP 4.0 4.0 None 0.18 6.3 6.3 None 9.3 9.3 None 10.5 10.5 None PIPE13389 A4 ZPIP16043 4 0 1 CIRCULAR 0.035 RCP 42.6 47.2 None 0.17 69.7 76.3 None 105.3 113.0 None 119.8 127.0 None PIPE12486 A4 ZPIP10310 1.5 0 1 CIRCULAR 0.018 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 0.0 None 0.0 6.6 None PIPE12516 A4 ZPIP12923 2.5 0 1 CIRCULAR 0.006 RCP 4.8 4.9 None 0.16 8.4 8.4 None 12.7 12.7 None 14.4 14.4 None PIPE12652 A4 ZPIP13212 3.5 0 1 CIRCULAR 0.007 RCP 5.1 5.8 None 0.07 8.0 10.5 None 13.3 34.6 None 15.3 37.5 None PIPE13001 A4 ZPIP11280 1.5 0 1 CIRCULAR 0.052 RCP 3.3 3.3 None 0.14 5.8 5.8 None 9.4 9.4 None 11.0 10.9 None PIPE13103 A4 ZPIP11553 1.5 0 1 CIRCULAR 0.017 RCP 2.3 2.3 None 0.17 3.7 3.7 None 5.5 5.5 None 6.3 6.3 None PIPE13119 A4 ZPIP11562 3.5 0 1 CIRCULAR 0.013 RCP 30.3 28.9 None 0.26 48.4 38.5 None 69.1 49.9 None 77.3 51.8 None PIPE12662 A4 ZPIP10482 1.5 0 1 CIRCULAR 0.050 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 2.2 None 0.0 10.7 None PIPE12738 A4 ZPIP13308 2.5 0 1 CIRCULAR 0.023 RCP 10.0 10.1 None 0.16 16.5 16.5 None 24.6 24.7 None 28.0 28.0 None PIPE13007 A4 ZPIP17245 5 0 1 CIRCULAR 0.087 RCP 91.9 91.9 None 0.12 185.4 186.0 None 293.8 295.2 None 340.5 343.5 None PIPE13010 A4 ZPIP11283 5 0 1 CIRCULAR 0.102 RCP 97.5 97.6 None 0.12 195.5 196.4 None 309.7 315.8 None 359.6 377.1 None PIPE13166 A4 ZPIP15458 4.5 0 1 CIRCULAR 0.013 RCP 14.0 14.6 None 0.07 22.6 24.5 None 29.2 132.5 None 30.7 101.9 Upstream PIPE12344 A4 ZPIP12481 3 0 1 CIRCULAR 0.073 RCP 23.2 23.3 None 0.13 43.9 43.9 None 67.7 66.3 None 77.8 79.5 None PIPE12491 A4 ZPIP12895 1.5 0 1 CIRCULAR 0.297 RCP 5.1 5.1 None 0.09 11.7 11.7 None 18.9 25.5 Downstream 21.9 25.3 Downstream PIPE12600 A4 ZPIP16654 2 0 1 CIRCULAR 0.038 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 18.3 Downstream 0.0 19.3 Both Upstream and Downstream PIPE12718 A4 ZPIP16903 4 0 1 CIRCULAR 0.028 RCP 26.6 26.8 None 0.11 56.7 56.9 None 89.9 90.3 None 103.3 104.4 None PIPE13156 A4 ZPIP15449 3 0 1 CIRCULAR 0.005 RCP 8.7 8.7 None 0.19 14.2 14.2 None 21.0 20.0 None 23.8 20.3 None PIPE13235 A4 ZPIP11755 2.5 0 1 CIRCULAR 0.109 RCP 13.1 13.1 None 0.1 26.6 30.0 Upstream 41.7 57.8 Both Upstream and Downstream 48.0 59.9 Both Upstream and Downstream PIPE13460 A4 ZPIP16588 3 0 1 CIRCULAR 0.040 RCP 15.5 15.5 None 0.12 32.2 32.2 None 49.9 49.9 None 58.5 58.5 None PIPE13583 A4 ZPIP11048 2 0 1 CIRCULAR 0.021 RCP 0.0 0.1 None 0 0.3 16.8 Both Upstream and Downstream 0.4 14.1 Both Upstream and Downstream 0.4 14.3 Both Upstream and Downstream PIPE12526 A4 ZPIP12985 2 0 1 CIRCULAR 0.015 RCP 4.5 4.5 None 0.16 7.2 7.3 None 10.7 10.7 None 12.1 12.1 None PIPE12660 A4 ZPIP16892 4 0 1 CIRCULAR 0.028 RCP 25.8 26.0 None 0.11 55.3 55.5 None 87.9 88.2 None 101.0 102.1 None PIPE12825 A4 ZPIP10653 3.5 0 1 CIRCULAR 0.092 RCP 70.0 70.4 None 0.23 111.9 111.8 None 165.6 135.2 Both Upstream and Downstream 187.4 130.4 Both Upstream and Downstream PIPE12873 A4 ZPIP17035 2.5 0 1 CIRCULAR 0.085 RCP 16.2 16.2 None 0.14 29.6 29.7 None 45.2 45.2 None 51.7 51.7 None PIPE13027 A4 ZPIP17292 1.5 0 1 CIRCULAR 0.037 RCP 0.0 0.0 None 0 0.4 0.2 None 0.7 0.2 None 28.2 8.6 None PIPE13182 A4 ZPIP17493 1.5 0 1 CIRCULAR 0.043 RCP 3.1 3.1 None 0.14 5.3 5.3 None 7.9 8.1 None 9.0 9.4 None PIPE13376 A4 ZPIP16001 3.5 0 1 CIRCULAR 0.117 RCP 48.5 48.5 None 0.14 85.7 85.6 None 129.8 130.1 None 149.4 149.2 None PIPE12596 A4 ZPIP16868 3 0 1 CIRCULAR 0.014 RCP 7.7 7.7 None 0.1 17.2 17.2 None 27.4 27.4 None 31.8 33.2 None PIPE12644 A4 ZPIP16890 2 0 1 CIRCULAR 0.122 RCP 11.1 11.1 None 0.14 18.8 18.8 None 28.8 28.7 None 32.8 33.5 None PIPE12737 A4 ZPIP13307 2.5 0 1 CIRCULAR 0.037 RCP 12.1 12.2 None 0.15 19.9 20.0 None 29.7 29.7 None 33.7 33.7 None PIPE12854 A4 ZPIP10774 3 0 1 CIRCULAR 0.015 RCP 12.4 12.4 None 0.15 20.1 20.2 None 29.7 29.7 None 33.6 33.6 None PIPE12872 A4 ZPIP13797 2.5 0 1 CIRCULAR 0.089 RCP 16.2 16.3 None 0.13 29.6 29.7 None 45.2 45.3 None 51.8 51.8 None PIPE12967 A4 ZPIP17181 1.5 0 1 CIRCULAR 0.020 RCP 0.2 0.1 None 0.01 0.2 0.2 None 0.3 7.5 None 8.6 6.2 None PIPE12973 A4 ZPIP11130 1.5 0 1 CIRCULAR 0.334 RCP 0.0 0.0 None 0 0.0 0.0 None 0.0 22.6 None 0.0 25.6 None PIPE13132 A4 ZPIP17413 1.5 0 1 CIRCULAR 0.005 RCP 1.2 1.2 None 0.16 1.9 1.9 None 2.7 2.7 None 3.1 3.1 None PIPE13283 A4 ZPIP11792 2 0 1 CIRCULAR 0.012 HDPE 3.7 3.7 None 0.15 6.1 6.2 None 9.1 9.1 None 10.3 10.3 None