Method
ASTM
D4327
ASTM
D4327
ASTM
G187
ASTMG51
ASTM
G200
SM4500-D
ASTM
D4327
ASTM
D6919
ASTM
D6919
ASTM
D6919
ASTM
D6919
ASTM
D6919
ASTM
D6919
ASTM
D4327
ASTM
D4327
Bore# / Description
Depth
Sulfates
soya-
Chlorides
CI-
Resistivity
As Rec'd I Minimum
pH
Redox
Sulfide
S2-
Nitrate
NO3
Ammonium
Ntla'
Lithium
Li'
Sodium
W
Potassium
K�
Magnesium
Mg2'
Calcium
Cap'
Fluoride
Fi"
Phosphate
Po"
(R)
(mg/kg)
(wt%)
(mg/kg)
(wt%)
(Ohm -cm)
(Ohm -cm)
(mv)
(mg/kg)
(mg/kg)
(mg/kg)
(mg/kg)
(mg/kg)
(mg/kg)
(mg/kg)
(mg/kg)
(mg/kg)
(mg/kg)
B-3
0-5
25.8 10.0026
41.7 10.0042
254.600
12,730
5.2 158
0.72 14.9
1.9 ND
12.4 29.6
9.5 3.5
0.7 5.1
Cations and Anions, except Sulfide and Bicarbonate, tested with Ion Chromatography mg/kg = milligrams per kilogram (parts per million) of dry soil weight ND = 0 = Not Detected I NT = Not Tested I Unk = Unknown Chemical Analysis performed on 1:3 Soil -To -Water extract PPM = mg/kg (soil) = mg/L (Liquid)
29990 Technology Dr., Suite 13, Murrieta, CA 92563 Tel: 213-928-7213 Fax: 951-226-1720 www.projectxcorrosion.com
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- Corrosion Engineering
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Company Name:
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Contact Name:
Bruce Hick I
Ph... No:
661-233-5229
Ma0ing Address;
1548 N. Maple Ave. Corona, CA _ I
Contact Finaii:
[email protected]
Accounting Contact:
Invoice Email:
[email protected]
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15 APPENDIX C
PERCOLATION DATA SHEETS
AND PORCHET CALCULATIONS
Proposed Yucaipa Village Partners
Assessor's Parcel Number 0318-021-18, -19 and -58
12th Street and Avenue E
Yucaipa, San Bernardino County, California
Project No. 3272-CR
'G,
G E O T E K
Client: Rockwell Land Co.
Project: Yucaipa Village Partners
Project No: 3272-CR
Date: 7/26/2022
Boring No. 1-1
Percolation Rate (Porchet Method)
Time Interval, At = 10
Final Depth to Water, DF = 44.75
Test Hole Radius, r = 4
Initial Depth to Water, Do = 36
Total Test Hole Depth, DT = 60
Equation - It = AH (60r)
At (r+2Ha g)
Ho = DT - Do =
HF = DT - DF =
AH=AD= Ho- HF=
Havg = (Ho+HF)/2 =
It =
4.86 24
15.25 8.75
19.625
'r�
G E a T E K
Inches pc
Client: Rockwell Land Co.
Project: Yucaipa Village Partners
Project No: 3272-CR
Date: 7/26/2022
Boring No. 1-2
Percolation Rate (Porchet Method)
Time Interval, At = 10
Final Depth to Water, DF = 60
Test Hole Radius, r = 4
Initial Depth to Water, Do = 36
Total Test Hole Depth, DT = 60
Equation - It = AH (60r)
At (r+2Ha g)
Ho = DT - Do =
HF = DT - DF =
AH=AD= Ho- HF=
Havg = (Ho+HF)/2 =
It =
20.57 24
0 24
12 'r�
G E a T E K
Inches pc
Client: Rockwell Land Co.
Project: Yucaipa Village Partners
Project No: 3272-CR
Date: 7/26/2022
Boring No. 1-3
Percolation Rate (Porchet Method)
Time Interval, At = 10
Final Depth to Water, DF = 51
Test Hole Radius, r = 4
Initial Depth to Water, Do = 36
Total Test Hole Depth, DT = 60
Equation - It = AH (60r)
At (r+2Ha g)
Ho = DT - Do =
HF = DT - DF =
AH=AD= Ho- HF=
Havg = (Ho+HF)/2 =
It =
24 9
15 16.5
9.73 'r�
G E a T E K
Inches pc
Client: Rockwell Land Co.
Project: Yucaipa Village Partners
Project No: 3272-CR
Date: 7/26/2022
Boring No. 1-4
Percolation Rate (Porchet Method)
Time Interval, At = 10
Final Depth to Water, DF = 42.75
Test Hole Radius, r = 4
Initial Depth to Water, Do = 36
Total Test Hole Depth, DT = 60
Equation - It = AH (60r)
At (r+2Ha g)
Ho = DT - Do =
HF = DT - DF =
AH=AD= Ho- HF=
Havg = (Ho+HF)/2 =
It =
3.58 24
17.25 6.75
20.625
'r�
G E a T E K
Inches pc
PERCOLATION DATA SHEET
Project: Yucaipa Vill
Test Hole No.: 1-1 Tested By: KIG
Depth of Hole As Drilled:
60" Before Test: 60"
Job No.: 3272-CR
Date: 7/26/22
After Test: 60"
Reading
No.
Time
Time
Interval
(Min)
Total
Depth of
Hole
(Inches)
Initial
Water
Level
(Inches)
Final
water
Level
(Inches)
A in Water
Level
(Inches)
Rate
(minutes
per Inch)
Comments
1 7:05
25 60"
36"
60.00"
24.00"
0.77 7:30
2 7:30
25 60"
36"
60.00"
24.00"
0.83 7:55
3 7:55
10 60"
36"
47.50"
11.50"
0.87 8:05
4 8:06
10 60"
36"
45.00"
9.00"
1.11 8:16
5 8:16
10 60"
36"
44.00"
8.00"
1.25 8:26
6 8:27
10 60"
36"
44.50"
8.50"
1.17 8:37
7 8:38
10 60"
36"
44.75"
8.75"
1.14 8:48
8 8:50
10 60"
36"
44.75"
8.75"
1.14 9:00
PERCOLATION DATA SHEET
Project: Yucaipa Vill
Test Hole No.: 1-2 Tested By: KIG
Depth of Hole As Drilled:
60" Before Test: 60"
Job No.: 3272-CR
Date: 7/26/22
After Test: 60"
Reading
No.
Time
Time
Interval
(Min)
Total
Depth of
Hole
(Inches)
Initial
Water
Level
(Inches)
Final
water
Level
(Inches)
A in Water
Level
(Inches)
Rate
(minutes
per Inch)
Comments
1 12:39
3.5 60"
36"
60"
24.00"
0.146
12:42
2 12:43
3.25 60"
36"
60"
24.00"
0.135
12:46
3 12:47
6.75 60"
36"
60"
24.00"
0.281
12:54
4 12:55
4.25 60"
36"
60"
24.00"
0.177
12:59
5 1:00
2.00 60"
36"
60"
24.00"
0.083
1:02
6 1:03
1.43 60"
36"
60"
24.00"
0.060
1:05
7 1:06
1.58 60"
36"
60"
24.00"
0.066
1:08
8 1:09
1.47 60"
36"
60"
24.00"
0.061
1:11
PERCOLATION DATA SHEET
Project: Yucaipa Vill
Test Hole No.: 1-3 Tested By: KIG
Depth of Hole As Drilled:
60" Before Test: 60"
Job No.: 3272-CR
Date: 7/26/22
After Test: 60"
Reading
No.
Time
Time
Interval
(Min)
Total
Depth of
Hole
(Inches)
Initial
Water
Level
(Inches)
Final
water
Level
(Inches)
A in Water
Level
(Inches)
Rate
(minutes
per Inch)
Comments
1 9:59
6 60"
36"
60"
24.00"
0.25 10:05
2 10:06
9 60"
36"
60"
24.00"
0.375
10:12
3 10:13
10 60"
36"
55.125
19.125"
0.52 10:23
4 10:24
10 60"
36"
53.50"
17.50"
0.57 10:34
5 10:35
10 60"
36"
52.75"
16.75"
0.60 10:45
6 10:45
10 60"
36"
51.75"
15.75"
0.63 10:55
7 10:56
10 60"
36"
51.25"
15.25"
0.66 11:06
8 11:07
10 60"
36"
51.00"
15.00"
0.67 11:17
PERCOLATION DATA SHEET
Project: Yucaipa Vill
Test Hole No.: 1-4 Tested By: KIG
Depth of Hole As Drilled:
60" Before Test: 60"
Job No.: 3272-CR
Date: 7/26/22
After Test: 60"
Reading
No.
Time
Time
Interval
(Min)
Total
Depth of
Hole
(Inches)
Initial
Water
Level
(Inches)
Final
water
Level
(Inches)
A in Water
Level
(Inches)
Rate
(minutes
per Inch)
Comments
1 10:55
15 60"
36"
60.00"
24.00"
0.625
11:10
2 11:10
18 60"
36"
60.00"
24.00"
0.75 11:28
3 11:29
10 60"
36"
50.875
14.875"
0.67 11:39
4 11:40
10 60"
36"
45.25"
9.25"
1.08 11:50
5 11:51
10 60"
36"
43.25"
7.25"
1.38 12:01
6 12:02
10 60"
36"
43.25"
7.25"
1.38 12:12
7 12:14
10 60"
36"
43.00"
7.00"
1.43 12:24
8 12:25
10 60"
36"
42.75"
6.75"
1.48 12:35
APPENDIX D
GENERAL EARTHWORK GRADING GUIDELINES
Proposed Yucaipa Village Partners
Assessor's Parcel Number 0318-021-18, -19 and -58
12th Street and Avenue E
Yucaipa, San Bernardino County, California
Project No. 3272-CR
G E O T E K
GENERAL GRADING GUIDELINES APPENDIX D
Yucaipa Village Partners Page D-I
Yucaipa, San Bernardino County, California Project No. 3272-CR
GENERAL GRADING GUIDELINES
Guidelines presented herein are intended to address general construction procedures for earthwork construction. Specific situations and conditions often arise which cannot reasonably be discussed in general guidelines, when anticipated these are discussed in the text of the report. Often unanticipated conditions are encountered which may necessitate modification or changes to these guidelines. It is our hope that these will assist the contractor to more efficiently complete the project by providing a reasonable understanding of the procedures that would be expected during earthwork and the testing and observation used to evaluate those procedures.
General
Grading should be performed to at least the minimum requirements of governing agencies, Chapters 18 and 33 of the Uniform Building Code, CBC (2019) and the guidelines presented below.
Preconstruction Meeting
A preconstruction meeting should be held prior to site earthwork. Any questions the contractor has regarding our recommendations, general site conditions, apparent discrepancies between reported and actual conditions and/or differences in procedures the contractor intends to use should be brought up at that meeting. The contractor (including the main onsite representative) should review our report and these guidelines in advance of the meeting. Any comments the contractor may have regarding these guidelines should be brought up at that meeting.
Grading Observation and Testing
Observation of the fill placement should be provided by our representative during grading.
Verbal communication during the course of each day will be used to inform the contractor of test results. The contractor should receive a copy of the "Daily Field Report" indicating results of field density tests that day. If our representative does not provide the contractor with these reports, our office should be notified.
2. Testing and observation procedures are, by their nature, specific to the work or area observed and location of the tests taken, variability may occur in other locations. The contractor is responsible for the uniformity of the grading operations; our observations and test results are intended to evaluate the contractor's overall level of efforts during grading. The contractor's personnel are the only individuals participating in all aspect of site work. Compaction testing and observation should not be considered as relieving the contractor's responsibility to properly compact the fill.
3. Cleanouts, processed ground to receive fill, key excavations, and subdrains should be observed by our representative prior to placing any fill. It will be the contractor's responsibility to notify our representative or office when such areas are ready for observation. ,G�
GEOTEK
GENERAL GRADING GUIDELINES APPENDIX D
Yucaipa Village Partners Page D-2
Yucaipa, San Bernardino County, California Project No. 3272-CR
4. Density tests may be made on the surface material to receive fill, as considered warranted by this firm.
5. In general, density tests would be made at maximum intervals of two feet of fill height or every 1,000 cubic yards of fill placed. Criteria will vary depending on soil conditions and size of the fill.
More frequent testing may be performed. In any case, an adequate number of field density tests should be made to evaluate the required compaction and moisture content is generally being obtained.
6. Laboratory testing to support field test procedures will be performed, as considered warranted, based on conditions encountered (e.g. change of material sources, types, etc.) Every effort will be made to process samples in the laboratory as quickly as possible and in progress construction projects are our first priority. However, laboratory workloads may cause in delays and some soils may require a minimum of 48 to 72 hours to complete test procedures.
Whenever possible, our representative(s) should be informed in advance of operational changes that might result in different source areas for materials.
7. Procedures for testing of fill slopes are as follows:
a) Density tests should be taken periodically during grading on the flat surface of the fill, three to five feet horizontally from the face of the slope. b) If a method other than over building and cutting back to the compacted core is to be employed, slope compaction testing during construction should include testing the outer six inches to three feet in the slope face to determine if the required compaction is being achieved.
8. Finish grade testing of slopes and pad surfaces should be performed after construction is complete.
Site Clearing
All vegetation, and other deleterious materials, should be removed from the site. If material is not immediately removed from the site it should be stockpiled in a designated area(s) well outside of all current work areas and delineated with flagging or other means. Site clearing should be performed in advance of any grading in a specific area.
2. Efforts should be made by the contractor to remove all organic or other deleterious material from the fill, as even the most diligent efforts may result in the incorporation of some materials.
This is especially important when grading is occurring near the natural grade. All equipment operators should be aware of these efforts. Laborers may be required as root pickers.
3. Nonorganic debris or concrete may be placed in deeper fill areas provided the procedures used are observed and found acceptable by our representative. Typical procedures are similar to those indicated on Plate D-4
'G�
GEQTEK
GENERAL GRADING GUIDELINES APPENDIX D
Yucaipa Village Partners Page D-3
Yucaipa, San Bernardino County, California Project No. 3272-CR Treatment of Existing Ground
Following site clearing, all surficial deposits of alluvium and colluvium as well as weathered or creep effected bedrock, should be removed (see Plates D-1, D-2 and D-3) unless otherwise specifically indicated in the text of this report.
2. In some cases, removal may be recommended to a specified depth (e.g. flat sites where partial alluvial removals may be sufficient). The contractor should not exceed these depths unless directed otherwise by our representative.
3. Groundwater existing in alluvial areas may make excavation difficult. Deeper removals than indicated in the text of the report may be necessary due to saturation during winter months.
4. Subsequent to removals, the natural ground should be processed to a depth of six inches, moistened to near optimum moisture conditions and compacted to fill standards.
5. Exploratory back hoe or dozer trenches still remaining after site removal should be excavated and filled with compacted fill if they can be located.
Subdrainage
I. Subdrainage systems should be provided in canyon bottoms prior to placing fill, and behind buttress and stabilization fills and in other areas indicated in the report. Subdrains should conform to schematic diagrams D- I and D-5, and be acceptable to our representative.
2. For canyon subdrains, runs less than 500 feet may use six-inch pipe. Typically, runs in excess of 500 feet should have the lower end as eight -inch minimum.
3. Filter material should be clean, 1/2 to I -inch gravel wrapped in a suitable filter fabric. Class 2 permeable filter material per California Department of Transportation Standards tested by this office to verify its suitability, may be used without filter fabric. A sample of the material should be provided to the Soils Engineer by the contractor at least two working days before it is delivered to the site. The filter should be clean with a wide range of sizes.
4. Approximate delineation of anticipated subdrain locations may be offered at 40-scale plan review stage. During grading, this office would evaluate the necessity of placing additional drains.
5. All subdrainage systems should be observed by our representative during construction and prior to covering with compacted fill.
6. Subdrains should outlet into storm drains where possible. Outlets should be located and protected. The need for backflow preventers should be assessed during construction.
7. Consideration should be given to having subdrains located by the project surveyors.
Fill Placement
Unless otherwise indicated, all site soil and bedrock may be reused for compacted fill; however, some special processing or handling may be required (see text of report). 'G�
GEQTEK
GENERAL GRADING GUIDELINES APPENDIX D
Yucaipa Village Partners Page D-4
Yucaipa, San Bernardino County, California Project No. 3272-CR
2. Material used in the compacting process should be evenly spread, moisture conditioned, processed, and compacted in thin lifts six (6) to eight (8) inches in compacted thickness to obtain a uniformly dense layer. The fill should be placed and compacted on a nearly horizontal plane, unless otherwise found acceptable by our representative.
3. If the moisture content or relative density varies from that recommended by this firm, the contractor should rework the fill until it is in accordance with the following:
a) Moisture content of the fill should be at or above optimum moisture. Moisture should be evenly distributed without wet and dry pockets. Pre -watering of cut or removal areas should be considered in addition to watering during fill placement, particularly in clay or dry surficial soils. The ability of the contractor to obtain the proper moisture content will control production rates.
b) Each six-inch layer should be compacted to at least 90 percent of the maximum dry density in compliance with the testing method specified by the controlling governmental agency. In most cases, the testing method is ASTM Test Designation D 1557.
4. Rock fragments less than eight inches in diameter may be utilized in the fill, provided:
a) They are not placed in concentrated pockets;
b) There is a sufficient percentage of fine-grained material to surround the rocks; c) The distribution of the rocks is observed by, and acceptable to, our representative.
5. Rocks exceeding eight (8) inches in diameter should be taken off site, broken into smaller fragments, or placed in accordance with recommendations of this firm in areas designated suitable for rock disposal (see Plate D-4). On projects where significant large quantities of oversized materials are anticipated, alternate guidelines for placement may be included. If significant oversize materials are encountered during construction, these guidelines should be requested.
6. In clay soil, dry or large chunks or blocks are common. If in excess of eight (8) inches minimum dimension, then they are considered as oversized. Sheepsfoot compactors or other suitable methods should be used to break up blocks. When dry, they should be moisture conditioned to provide a uniform condition with the surrounding fill.
Slope Construction
I. The contractor should obtain a minimum relative compaction of 90 percent out to the finished slope face of fill slopes. This may be achieved by either overbuilding the slope and cutting back to the compacted core, or by direct compaction of the slope face with suitable equipment.
2. Slopes trimmed to the compacted core should be overbuilt by at least three (3) feet with compaction efforts out to the edge of the false slope. Failure to properly compact the outer edge results in trimming not exposing the compacted core and additional compaction after trimming may be necessary.
'G�
GEQTEK
GENERAL GRADING GUIDELINES APPENDIX D
Yucaipa Village Partners Page D-5
Yucaipa, San Bernardino County, California Project No. 3272-CR
3. If fill slopes are built "at grade" using direct compaction methods, then the slope construction should be performed so that a constant gradient is maintained throughout construction. Soil should not be "spilled" over the slope face nor should slopes be "pushed out" to obtain grades.
Compaction equipment should compact each lift along the immediate top of slope. Slopes should be back rolled or otherwise compacted at approximately every 4 feet vertically as the slope is built.
4. Corners and bends in slopes should have special attention during construction as these are the most difficult areas to obtain proper compaction.
5. Cut slopes should be cut to the finished surface. Excessive undercutting and smoothing of the face with fill may necessitate stabilization.
Keyways, Buttress and Stabilization Fills
Keyways are needed to provide support for fill slope and various corrective procedures.
I . Side -hill fills should have an equipment -width key at their toe excavated through all surficial soil and into competent material and tilted back into the hill (Plates D-2, D-3). As the fill is elevated, it should be benched through surficial soil and slopewash, and into competent bedrock or other material deemed suitable by our representatives (See Plates D-1, D-2, and D-3).
2. Fill over cut slopes should be constructed in the following manner:
a) All surficial soils and weathered rock materials should be removed at the cut -fill interface.
b) A key at least one and one-half (1.5) equipment width wide (or as needed for compaction), and tipped at least one (1) foot into slope, should be excavated into competent materials and observed by our representative. c) The cut portion of the slope should be excavated prior to fill placement to evaluate if stabilization is necessary. The contractor should be responsible for any additional earthwork created by placing fill prior to cut excavation. (see Plate D-3 for schematic details.)
3. Daylight cut lots above descending natural slopes may require removal and replacement of the outer portion of the lot. A schematic diagram for this condition is presented on Plate D-2.
4. A basal key is needed for fill slopes extending over natural slopes. A schematic diagram for this condition is presented on Plate D-2.
5. All fill slopes should be provided with a key unless within the body of a larger overall fill mass.
Please refer to Plate D-3 for specific guidelines.
Anticipated buttress and stabilization fills are discussed in the text of the report. The need to stabilize other proposed cut slopes will be evaluated during construction. Plate D-5 shows a schematic of buttress construction.
,G�
GEQTEK
GENERAL GRADING GUIDELINES APPENDIX D
Yucaipa Village Partners Page D-6
Yucaipa, San Bernardino County, California Project No. 3272-CR All backcuts should be excavated at gradients of 1:1 or flatter. The backcut configuration should be determined based on the design, exposed conditions, and need to maintain a minimum fill width and provide working room for the equipment.
2. On longer slopes, backcuts and keyways should be excavated in maximum 250 feet long segments. The specific configurations will be determined during construction.
3. All keys should be a minimum of two (2) feet deep at the toe and slope toward the heel at least one foot or two (2%) percent, whichever is greater.
4. Subdrains are to be placed for all stabilization slopes exceeding 10 feet in height. Lower slopes are subject to review. Drains may be required. Guidelines for subdrains are presented on Plate D-5.
5. Benching of backcuts during fill placement is required.
Lot Capping
When practical, the upper three (3) feet of material placed below finish grade should be comprised of the least expansive material available. Preferably, highly and very highly expansive materials should not be used. We will attempt to offer advice based on visual evaluations of the materials during grading, but it must be realized that laboratory testing is needed to evaluate the expansive potential of soil. Minimally, this testing takes two (2) to four (4) days to complete.
2. Transition lots (cut and fill) both per plan and those created by remedial grading (e.g. lots above stabilization fills, along daylight lines, above natural slopes, etc.) should be capped with a minimum three foot thick compacted fill blanket.
3. Cut pads should be observed by our representative(s) to evaluate the need for overexcavation and replacement with fill. This may be necessary to reduce water infiltration into highly fractured bedrock or other permeable zones, and/or due to differing expansive potential of materials beneath a structure. The overexcavation should be at least three feet. Deeper overexcavation may be recommended in some cases.
ROCK PLACEMENT AND ROCK FILL GUIDELINES
It is anticipated that large quantities of oversize material would be generated during grading. It's likely that such materials may require special handling for burial. Although alternatives may be developed in the field, the following methods of rock disposal are recommended on a preliminary basis.
Limited Larger Rock
When materials encountered are principally soil with limited quantities of larger rock fragments or boulders, placement in windrows is recommended. The following procedures should be applied:
Oversize rock (greater than 8 inches) should be placed in windrows. a) Windrows are rows of single file rocks placed to avoid nesting or clusters of rock. ,G�
GEQTEK
GENERAL GRADING GUIDELINES APPENDIX D
Yucaipa Village Partners Page D-7
Yucaipa, San Bernardino County, California Project No. 3272-CR b) Each adjacent rock should be approximately the same size (within —one foot in diameter).
c) The maximum rock size allowed in windrows is four feet
2. A minimum vertical distance of three feet between lifts should be maintained. Also, the windrows should be offset from lift to lift. Rock windrows should not be closer than 15 feet to the face of fill slopes and sufficient space must be maintained for proper slope construction (see Plate G-4).
3. Rocks greater than eight inches in diameter should not be placed within seven feet of the finished subgrade for a roadway or pads and should be held below the depth of the lowest utility. This will allow easier trenching for utility lines.
4. Rocks greater than four feet in diameter should be broken down, if possible, or they may be placed in a dozer trench. Each trench should be excavated into the compacted fill a minimum of one foot deeper than the largest diameter of rock.
a) The rock should be placed in the trench and granular fill materials (SE>30) should be flooded into the trench to fill voids around the rock.
b) The over size rock trenches should be no closer together than 15 feet from any slope face.
c) Trenches at higher elevation should be staggered and there should be a minimum of four feet of compacted fill between the top of the one trench and the bottom of the next higher trench.
d) It would be necessary to verify 90 percent relative compaction in these pits. A 24 to 72 hour delay to allow for water dissipation should be anticipated prior to additional fill placement.
Structural Rock Fills
If the materials generated for placement in structural fills contains a significant percentage of material more than six (6) inches in one dimension, then placement using conventional soil fill methods with isolated windrows would not be feasible. In such cases the following could be considered:
I. Mixes of large rock or boulders may be placed as rock fill. They should be below the depth of all utilities both on pads and in roadways and below any proposed swimming pools or other excavations. If these fills are placed within seven (7) feet of finished grade, they may affect foundation design.
2. Rock fills are required to be placed in horizontal layers that should not exceed two feet in thickness, or the maximum rock size present, which ever is less. All rocks exceeding two feet should be broken down to a smaller size, windrowed (see above), or disposed of in non-structural fill areas. Localized larger rock up to 3 feet in largest dimension may be placed in rock fill as follows:
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GEQTEK
GENERAL GRADING GUIDELINES APPENDIX D
Yucaipa Village Partners Page D-8
Yucaipa, San Bernardino County, California Project No. 3272-CR a) individual rocks are placed in a given lift so as to be roughly 50% exposed above the typical surface of the fill ,
b) loaded rock trucks or alternate compactors are worked around the rock on all sides to the satisfaction of the soil engineer,
c) the portion of the rock above grade is covered with a second lift.
3. Material placed in each lift should be well graded. No unfilled spaces (voids) should be permitted in the rock fill.
Compaction Procedures
Compaction of rock fills is largely procedural. The following procedures have been found to generally produce satisfactory compaction.
Provisions for routing of construction traffic over the fill should be implemented. a) Placement should be by rock trucks crossing the lift being placed and dumping at its edge.
b) The trucks should be routed so that each pass across the fill is via a different path and that all areas are uniformly traversed.
c) The dumped piles should be knocked down and spread by a large dozer (D-8 or larger suggested). (Water should be applied before and during spreading.)
2. Rock fill should be generously watered (sluiced)
a) Water should be applied by water trucks to the:
i) dump piles,
ii) front face of the lift being placed and,
iii) surface of the fill prior to compaction.
b) No material should be placed without adequate water. c) The number of water trucks and water supply should be sufficient to provide constant water.
d) Rock fill placement should be suspended when water trucks are unavailable:
i) for more than 5 minutes straight, or,
ii) for more than 10 minutes/hour.
3. In addition to the truck pattern and at the discretion of the soil engineer, large, rubber tired compactors may be required.
a) The need for this equipment will depend largely on the ability of the operators to provide complete and uniform coverage by wheel rolling with the trucks. b) Other large compactors will also be considered by the soil engineer provided that required compaction is achieved.
4. Placement and compaction of the rock fill is largely procedural. Observation by trenching should be made to check:
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GEOTEK
GENERAL GRADING GUIDELINES APPENDIX D
Yucaipa Village Partners Page D-9
Yucaipa, San Bernardino County, California Project No. 3272-CR a) the general segregation of rock size,
b) for any unfilled spaces between the large blocks, and c) the matrix compaction and moisture content.
5. Test fills may be required to evaluate relative compaction of finer grained zones or as deemed appropriate by the soil engineer.
a) A lift should be constructed by the methods proposed, as proposed
6. Frequency of the test trenching is to be at the discretion of the soil engineer. Control areas may be used to evaluate the contractor's procedures.
7. A minimum horizontal distance of 15 feet should be maintained from the face of the rock fill and any finish slope face. At least the outer 15 feet should be built of conventional fill materials.
Piping Potential and Filter Blankets
Where conventional fill is placed over rock fill, the potential for piping (migration) of the fine grained material from the conventional fill into rock fills will need to be addressed.
The potential for particle migration is related to the grain size comparisons of the materials present and in contact with each other. Provided that 15 percent of the finer soil is larger than the effective pore size of the coarse soil, then particle migration is substantially mitigated. This can be accomplished with a well -graded matrix material for the rock fill and a zone of fill similar to the matrix above it. The specific gradation of the fill materials placed during grading must be known to evaluate the need for any type of filter that may be necessary to cap the rock fills. This, unfortunately, can only be accurately determined during construction.
In the event that poorly graded matrix is used in the rock fills, properly graded filter blankets 2 to 3 feet thick separating rock fills and conventional fill may be needed. As an alternative, use of two layers of filter fabric (Mirafi 700 x or equivalent) could be employed on top of the rock fill. In order to mitigate excess puncturing, the surface of the rock fill should be well broken down and smoothed prior to placing the filter fabric. The first layer of the fabric may then be placed and covered with relatively permeable fill material (with respect to overlying material) I to 2 feet thick. The relative permeable material should be compacted to fill standards
conventional fill placement continued.
Subdrainage
The second layer of fabric should be placed and
Rock fill areas should be tied to a subdrainage system. If conventional fill is placed that separates the rock from the main canyon subdrain, then a secondary system should be installed. A system consisting of an adequately graded base (3 to 4 percent to the lower side) with a collector system and outlets may suffice.
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GEQTEK
GENERAL GRADING GUIDELINES APPENDIX D
Yucaipa Village Partners Page D-10
Yucaipa, San Bernardino County, California Project No. 3272-CR Additionally, at approximately every 25 foot vertical interval, a collector system with outlets should be placed at the interface of the rock fill and the conventional fill blanketing a fill slope Monitoring
Depending upon the depth of the rock fill and other factors, monitoring for settlement of the fill areas may be needed following completion of grading. Typically, if rock fill depths exceed 40 feet, monitoring would be recommend prior to construction of any settlement sensitive improvements. Delays of 3 to 6 months or longer can be expected prior to the start of construction.
UTILITY TRENCH CONSTRUCTION AND BACKFILL
Utility trench excavation and backfill is the contractor's responsibility. The geotechnical consultant typically provides periodic observation and testing of these operations. While efforts are made to make sufficient observations and tests to verify that the contractors' methods and procedures are adequate to achieve proper compaction, it is typically impractical to observe all backfill procedures. As such, it is critical that the contractor use consistent backfill procedures.
Compaction methods vary for trench compaction and experience indicates many methods can be successful. However, procedures that "worked" on previous projects may or may not prove effective on a given site. The contractor(s) should outline the procedures proposed, so that we may discuss them prior to construction. We will offer comments based on our knowledge of site conditions and experience.
I. Utility trench backfill in slopes, structural areas, in streets and beneath flat work or hardscape should be brought to at least optimum moisture and compacted to at least 90 percent of the laboratory standard. Soil should be moisture conditioned prior to placing in the trench.
2. Flooding and jetting are not typically recommended or acceptable for native soils. Flooding or jetting may be used with select sand having a Sand Equivalent (SE) of 30 or higher. This is typically limited to the following uses:
a) shallow (12 + inches) under slab interior trenches and, b) as bedding in pipe zone.
The water should be allowed to dissipate prior to pouring slabs or completing trench compaction.
3. Care should be taken not to place soils at high moisture content within the upper three feet of the trench backfill in street areas, as overly wet soils may impact subgrade preparation.
Moisture may be reduced to 2% below optimum moisture in areas to be paved within the upper three feet below sub grade.
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GEQTEK
GENERAL GRADING GUIDELINES APPENDIX D
Yucaipa Village Partners Page D-I I
Yucaipa, San Bernardino County, California Project No. 3272-CR
4. Sand backfill should not be allowed in exterior trenches adjacent to and within an area extending below a I:I projection from the outside bottom edge of a footing, unless it is similar to the surrounding soil.
S. Trench compaction testing is generally at the discretion of the geotechnical consultant. Testing frequency will be based on trench depth and the contractor's procedures. A probing rod would be used to assess the consistency of compaction between tested areas and untested areas. If zones are found that are considered less compact than other areas, this would be brought to the contractor's attention.
JOB SAFETY
General
Personnel safety is a primary concern on all job sites. The following summaries are safety considerations for use by all our employees on multi -employer construction sites. On ground personnel are at highest risk of injury and possible fatality on grading construction projects. The company recognizes that construction activities will vary on each site and that job site safety is the contractor's responsibility.
However, it is, imperative that all personnel be safety conscious to avoid accidents and potential injury.
In an effort to minimize risks associated with geotechnical testing and observation, the following precautions are to be implemented for the safety of our field personnel on grading and construction projects.
Safety Meetings: Our field personnel are directed to attend the contractor's regularly scheduled safety meetings.
2. Safety Vests: Safety vests are provided for and are to be worn by our personnel while on the job site.
3. Safety Flags: Safety flags are provided to our field technicians; one is to be affixed to the vehicle when on site, the other is to be placed atop the spoil pile on all test pits.
In the event that the contractor's representative observes any of our personnel not following the above, we request that it be brought to the attention of our office.
Test Pits Location, Orientation and Clearance
The technician is responsible for selecting test pit locations. The primary concern is the technician's safety. However, it is necessary to take sufficient tests at various locations to obtain a representative sampling of the fill. As such, efforts will be made to coordinate locations with the grading contractors authorized representatives (e.g. dump man, operator, supervisor, grade checker, etc.), and to select locations following or behind the established traffic pattern, preferably outside of current traffic. The contractors authorized representative should direct excavation of the pit and safety during the test period. Again, safety is the paramount concern.
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GEQTEK
GENERAL GRADING GUIDELINES APPENDIX D
Yucaipa Village Partners Page D-12
Yucaipa, San Bernardino County, California Project No. 3272-CR Test pits should be excavated so that the spoil pile is placed away from oncoming traffic. The technician's vehicle is to be placed next to the test pit, opposite the spoil pile. This necessitates that the fill be maintained in a drivable condition. Alternatively, the contractor may opt to park a piece of equipment in front of test pits, particularly in small fill areas or those with limited access.
A zone of non -encroachment should be established for all test pits (see diagram below). No grading equipment should enter this zone during the test procedure. The zone should extend outward to the sides approximately 50 feet from the center of the test pit and 100 feet in the direction of traffic flow.
This zone is established both for safety and to avoid excessive ground vibration, which typically decreases test results.
TEST PIT SAFETY PLAN
Test Pit
Spoil
pile
SIDE VIEW
50 ft Zone of
Traffic Direction
Non -Encroachment
Vehicle
Test Pit
Spoil
parked here
pile
110 ft Zone of
Non -Encroachment
50 ft Zone of
Non -Encroachment
PLAN VIEW
Slope Tests
When taking slope tests, the technician should park their vehicle directly above or below the test location on the slope. The contractor's representative should effectively keep all equipment at a safe operation distance (e.g. 50 feet) away from the slope during testing.
The technician is directed to withdraw from the active portion of the fill as soon as possible following testing. The technician's vehicle should be parked at the perimeter of the fill in a highly visible location.
Trench Safety
It is the contractor's responsibility to provide safe access into trenches where compaction testing is needed. Trenches for all utilities should be excavated in accordance with CAL -OSHA and any other applicable safety standards. Safe conditions will be required to enable compaction testing of the trench backfill.
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GEQTEK
GENERAL GRADING GUIDELINES APPENDIX D
Yucaipa Village Partners Page D-13
Yucaipa, San Bernardino County, California Project No. 3272-CR All utility trench excavations in excess of 5 feet deep, which a person enters, are to be shored or laid back. Trench access should be provided in accordance with OSHA standards. Our personnel are directed not to enter any trench by being lowered or "riding down" on the equipment.
Our personnel are directed not to enter any excavation which; I . is 5 feet or deeper unless shored or laid back,
2. exit points or ladders are not provided,
3. displays any evidence of instability, has any loose rock or other debris which could fall into the trench, or
4. displays any other evidence of any unsafe conditions regardless of depth.
If the contractor fails to provide safe access to trenches for compaction testing, our company policy requires that the soil technician withdraws and notifies their supervisor. The contractor's representative will then be contacted in an effort to affect a solution. All backfill not tested due to safety concerns or other reasons is subject to reprocessing and/or removal.
Procedures
In the event that the technician's safety is jeopardized or compromised as a result of the contractor's failure to comply with any of the above, the technician is directed to inform both the developer's and contractor's representatives. If the condition is not rectified, the technician is required, by company policy, to immediately withdraw and notify their supervisor. The contractor's representative will then be contacted in an effort to affect a solution. No further testing will be performed until the situation is rectified. Any fill placed in the interim can be considered unacceptable and subject to reprocessing, recompaction or removal.
In the event that the soil technician does not comply with the above or other established safety guidelines, we request that the contractor bring this to technician's attention and notify our project manager or office. Effective communication and coordination between the contractors' representative and the field technician(s) is strongly encouraged in order to implement the above safety program and safety in general.
The safety procedures outlined above should be discussed at the contractor's safety meetings. This will serve to inform and remind equipment operators of these safety procedures particularly the zone of non -encroachment.
The safety procedures outlined above should be discussed at the contractor's safety meetings. This will serve to inform and remind equipment operators of these safety procedures particularly the zone of non -encroachment.
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GEQTEK
ALTERNATES
Bottom of Cleanout to Be At
Least 1.5 Times the Width of 3 6" Perforated Pipe in 9 cubic feet per Lineal Compaction Equipment �: Foot Clean Gravel Wrapped in Filter Fabric 3'
Finish Grade
Original Ground
j� Loose Surface Materials
/ 4 feet typical
Suitable
Construct Benches Material
where slope exceeds 5:1 I ,FFI- Dr in
Bottom of Cleanout to Be At
Least 1.5 Times the Width of 6" Perforated Pipe in 9 cubic feet Compaction Equipment per Lineal Foot Clean Gravel
Wrapped in Filter Fabric
Finish Grade
Min. 3 Feet
Compacted Fill
TYPICAL FILL SLOPE OVER
NATURAL DESCENDING SLOPE
Compacted Fill Fill Slope
..........
...........
..........
...........
Toe of Fill Slope
Topsoil per Plan
Colluvium
Project Removal
1 to 1
> > > > > J > > > >
>
.Bedrock.>>>>{>{>{>{
> > } > > > > > > > > > > > > > Min.
f
>>>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>>> o
Min. 2 /o Fall
> J > > > > > > > Y > > > J > > > > J > > > > > > > J > > > > Y > > > > > >
`>`>`>`>`>`>`>`>`>`>`>`>`>`>`>`>`>`>`>`>`>`>`>`>`>`>`>`>`>`>`>`> or1.5 Equipment , > > > > > > > > > > } Min.
>>>>>>>>>>>> 2Feet >>r,
Colluvium
Min. 2 /o Fall > > >
Creep Zone
> > > > > > > > > > or 1.5 Equipment > > > > > > > > > > > > ' ' ' ' Widths for Compaction ' ' ' ' ' ' ' > > > ' ' ' ' ' ' ' > > '
Finish Grade
TYPICAL FILL SLOPE OVER
CUT SLOPE
2: 1 Fill Slope
Toe of Fill Slope
per Plan
Top it
C Iluvium
> > > > > > > > > > > > Min.2%Fall Creep Zone
Minimum 15 Feet Wide
t <> or 1.5 Equipment
Widths for Compaction
>>>>>>>>>>>>
Cut Slope
Bedrock.
>>. >>>>>>>>>>>>>>>>>>
> Y > > > > > > > > > > > > > > > > > >
> > Y > > > > > > > > > > > > > > > > > >
> > ) > > > > > > > > > > > > > > > > > p
>> toprovidelateralsupport.>''>>>>`'>>>>``>>>>''>>>>`'>>>`>>>> : > > > > > > > > > > > > > > > > > > > > > > > >
Bedrock or >} >>>>>>>>>>>>>>>>>>>>>>>>>>
< Excavate key if width or depth < < < < < < < < < < < < < < < < < < < < < < < 3.< < < < Suitable Dense Material ` " " " " " " " < " " " " " "
,' Jess.. than indicated in table above , , , , , , , , , , , , , , , , , , , , , , , ,
CROSS SECTIONAL VIEW
FINI RADE
T
NO ROCKS IN
EE N TE
1 THIS ZONE ❑ ❑❑❑ ❑E
a a
------------------- --------------------
-- ----❑� IN[] - MINij.
�O---------------------
T
❑TA❑ ❑ ER R❑ ❑ ❑ ❑dVl I N C
❑❑RI❑❑NTA❑❑❑-----
---- -- ------ ----
MINIM❑M ❑❑mLEAR Li
❑®E❑❑111MENT ❑ IDT❑❑
F❑R ❑❑M❑A❑TI❑N
PLAN VIEW
FI❑❑ E
MINIM❑M [][]Ell FEAR ❑R F"--1E1-1FI11MENT
❑ IDT❑❑ FOR ❑F M A TI N
❑❑A❑E Rill] DE END T❑ END
o�oao0�oa o Oooao��o� o
1 D❑ NOT ❑ LE OR ❑TA❑❑ R❑❑❑❑
MINIM❑M ❑❑mLEAR ❑R ❑®E❑❑I❑MENT
❑ IDTF- F❑R ❑❑M❑A❑TI❑N
1 o�oaoo�oaooaoaoo�o
I T E Li -AL EAR ND AND ❑ ❑ER RI T EN F-L- DED INT❑
ID M I❑T ❑GM A TAR❑❑ND AND EIDER EA-- R❑❑❑ L� INDR-❑
N❑TE❑❑
❑❑ ❑❑1❑FI❑❑❑❑ER ❑ INDR❑❑ ❑❑❑[]D ❑E [I FEET ❑R HER mRIOD❑I❑TI❑NA❑❑TANDARD❑AND ❑❑FFI❑IENT F❑R F❑T❑RE E❑❑A❑ATI❑N❑ T❑ A❑❑ID R❑❑❑❑
❑❑ MA❑IM❑M R❑❑❑ ❑ILIE IN ❑ INDR❑❑ ❑ I❑ ❑FEET
❑❑ ❑❑1❑AR❑❑ND ❑ INDR❑❑ ❑T❑ ❑E ❑AND❑ MATERIAL] ❑❑❑1E [IT T❑ ❑❑1❑EN❑INEERAll ❑E❑TAN❑E ❑❑ ❑❑A❑IN❑ AND ' ' EARAN' E❑ MOOT ❑E ❑❑FFI❑IENTT❑ A❑❑❑❑ FOR ❑R❑❑ER ❑❑M❑A❑TI❑N ❑❑ INDI❑D❑A❑❑ARSE R❑--- MA❑ ❑E ❑❑RIED IN ❑IT❑❑
....................
...................
.....................
MIN. 3 FEET
COMPACTED FILL
�R
qb�
=141]:tell]N
4" diameter perforated drain pipe
(Schedule 40 PVC or equivalent) in
6 cubic feet per lineal foot clean gravel
wrapped in filter fabric
TERRACE DRAIN
AS REQUIRED
.................................
................................
COMPACTED FILL
1 MIN. 2 FEET
EMBEDDMENT
SEE DETAILS FOR BACKDRAIN
AND HEEL DRAIN
BACKDRAIN
DETAILS
2% Minimum -
Fall
4" diameter solid outlet pipe (Schedule 40
PVC or equivalent) laterals to slope face or
storm drain system at maximum 100 foot
maximum intervals
Note: Additional backdrains may be recommended
MIN. 15 FEET WIDE OR 1.5 EQUIPMENT
WIDTHS FOR COMPACTION
HEEL DRAIN
DETAILS
s.
o
6" diameter perforated drain pipe in 6 cubic
feet per lineal foot clean gravel wrapped
in filter fabric, outlet pipe to gravity flow
with 2 % minimum fall
Appendix F
Rockwell Technical Studies Greenhouse Gas
Analysis
"�- City of Yucaipa
Starling Heights SP TTM 20372
Initial Study/Mitigated Negative Declaration
April 2024
Page117
L!O�URBAM
CROSSROADS
Rockwell Technical Studies
GREENHOUSE GAS ANALYSIS
CITY OF YUCAIPA
PREPARED BY:
Haseeb Qureshi
[email protected]
Ali Dadabhoy
[email protected]
September 8, 2023
15223-03 GHG Report
Rockwell Technical Studies Greenhouse Gas Analysis
TABLE OF CONTENTS
TABLE OF CONTENTS............................................................................................................................. I APPENDICES.......................................................................................................................................... I LIST OF EXHIBITS................................................................................................................................... I LISTOF TABLES.................................................................................................................................... II LIST OF ABBREVIATED TERMS.............................................................................................................
III
EXECUTIVE SUMMARY.......................................................................................................................VII ES.1 Summary of Findings....................................................................................................................vii ES.2 Project Requirements..................................................................................................................vii 1 INTRODUCTION........................................................................................................................... 9
1.1 Site Location.................................................................................................................................. 9
1.2 Project Description........................................................................................................................ 9 2 CLIMATE CHANGE SETTING....................................................................................................... 13 2.1 Introduction to Global Climate Change (GCC)............................................................................ 13 2.2 Global Climate Change Defined.................................................................................................. 13 2.3 GHGs........................................................................................................................................... 13 2.4 Global Warming Potential........................................................................................................... 20 2.5 Greenhouse Gas Emissions Inventories...................................................................................... 20 2.6 Regulatory Setting......................................................................................................................... 1 2.8 City of Yucaipa CAP..................................................................................................................... 19 3 PROJECT GREENHOUSE GAS IMPACT......................................................................................... 22 3.1 Introduction................................................................................................................................ 22 3.2 Standards of Significance............................................................................................................ 22 3.3 California Emissions Estimator ModelT"
22 3.4 Construction and Operational Life -Cycle Analysis Not Required ................................................ 22 3.5 Construction Emissions............................................................................................................... 23 3.6 Operational Emissions................................................................................................................ 25 3.7 Emissions Summary.................................................................................................................... 27 3.8 Greenhouse Gas Emissions Findings and Recommendations..................................................... 27 4 REFERENCES..............................................................................................................................29 5 CERTIFICATIONS........................................................................................................................33
APPENDICES
APPENDIX 3.1: PROJECT CALEEMOD CONSTRUCTION EMISSIONS MODEL OUTPUTS APPENDIX 3.2: PROJECT CALEEMOD OPERATIONAL EMISSIONS MODEL OUTPUTS
LIST OF EXHIBITS
EXHIBIT1-A: LOCATION MAP............................................................................................................ 10 EXHIBIT 1-B: SITE PLAN...................................................................................................................... 11 EXHIBIT 2-A: SUMMARY OF PROJECTED GLOBAL WARMING IMPACT, 2070-2099 (AS COMPARED WITH 1961-1990)......................................................................................................................................... 19 `�'► URBAN
15223-03 GHG Report
Rockwell Technical Studies Greenhouse Gas Analysis
LIST OF TABLES
TABLE ES-1: SUMMARY OF CEQA SIGNIFICANCE FINDINGS................................................................ VII TABLE2-1: GHGS................................................................................................................................ 14 TABLE 2-2: GWP AND ATMOSPHERIC LIFETIME OF SELECT GHGS........................................................ 20 TABLE 2-3: TOP GHG PRODUCING COUNTRIES AND THE EUROPEAN UNION ........................................ 1 TABLE 3-1: CONSTRUCTION DURATION.............................................................................................. 23 TABLE 3-2: CONSTRUCTION EQUIPMENT ASSUMPTIONS.................................................................... 24 TABLE 3-3: CONSTRUCTION GHG EMISSIONS...................................................................................... 25 TABLE 3-4: PROJECT GHG EMISSIONS................................................................................................. 27 ` 1 URBAN
15223-03 GHG Report
Rockwell Technical Studies Greenhouse Gas Analysis
LIST OF ABBREVIATED TERMS
%
Percent
°F
Degrees Fahrenheit
(1)
Reference
AB
Assembly Bill
AB 32
Global Warming Solutions Act of 2006
AB 1493
Pavley Fuel Efficiency Standards
ABAU
Adjusted BAU
Annex I
Industrialized Nations
APA
Administrative Procedure Act
BAU
Business as Usual
C2F6
Hexafluoroethane
C21-16
Ethane
C21-12F4
Tetrafluroethane
C21-14F2
Ethylidene Fluoride
CAA
Federal Clean Air Act
CalEEMod
California Emissions Estimator Model
CALGAPS
California LBNL GHG Analysis of Policies Spreadsheet
CALGreen
California Green Building Standards Code
CAPCOA
California Air Pollution Control Officers Association
CARB
California Air Resource Board
CAP
Climate Action Plan
CEC
California Energy Commission
CEQA
California Environmental Quality Act
CF4
Tetrafluoromethane
CFC
Chlorofluorocarbons
CH4
Methane
CHF3
Fluoroform
CH2FCF
1,1,1,2-tetrafIuoroethane
CH3CF2
1,1-difluoroethane
CNRA
California Natural Resources Agency
CNRA 2009
2009 California Climate Adaptation Strategy
CO2
Carbon Dioxide
CO2e
Carbon Dioxide Equivalent
CPUC
California Public Utilities Commission
EMFAC
EMissions FACtor
EPA
U.S. Environmental Protection Agency
L'! URBAN
15223-03 GHG Report
Rockwell Technical Studies Greenhouse Gas Analysis
GCC
Global Climate Change
Gg
Gigagram
GHGA
Greenhouse Gas Analysis
GWP
Global Warming Potential
HDT
Heavy -Duty Trucks
IPCC
Intergovernmental Panel on Climate Change
LBNL
Lawrence Berkeley National Laboratory
LCA
Life -Cycle Analysis
LCD
Liquid Crystal Display
LCFS
Low Carbon Fuel Standard
LEV III
Low -Emission Vehicle
MMT CO2e
Million Metric Ton of Carbon Dioxide Equivalent
MPG
Miles Per Gallon
MPOs
Metropolitan Planning Organizations
MT/yr
Metric Tons Per Year
MT COze
Metric Ton of Carbon Dioxide Equivalent
MWELO
California Department of Water Resources' Model Water
Efficient
N20
Nitrous Oxide
NFs
Nitrogen Trifluoride
NHTSA
National Highway Traffic Safety Administration
NIOSH
National Institute for Occupational Safety and Health
NOx
Oxides of Nitrogen
Non -Annex I
Developing Nations
OAL
Office of Administrative Law
OPR
Office of Planning and Research
PFC
Perfluorocarbons
ppm
Parts Per Million
ppt
Parts Per Trillion
Project
Rockwell Technical Studies
RPS
Renewable Portfolio Standards
RTPs
Regional Transportation Plans
SB
Senate Bill
SB 32
California Global Warming Solutions Act of 2006: Emission Limit
SB 375
Regional GHG Emissions Reduction Targets/Sustainable
Communities Strategies
SCAQMD
South Coast Air Quality Management District
` 1 URBAN
15223-03 GHG Report
iv
Rockwell Technical Studies Greenhouse Gas Analysis
sf
Square Feet
SF6
Sulfur Hexafluoride
SP
Service Population
SR-79
State Route 79
UNFCCC
United Nations' Framework Convention on Climate Change
VMT
Vehicle Miles Traveled
VOC
Volatile Organic Compounds
WRI
World Resources Institute
ZEV
Zero -Emissions Vehicles
` 1 URBAN
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Rockwell Technical Studies Greenhouse Gas Analysis
This page intentionally left blank.
L'! URBAN
15223-03 GHG Report
Rockwell Technical Studies Greenhouse Gas Analysis
EXECUTIVE SUMMARY
ES.1 SUMMARY OF FINDINGS
The results of this Rockwell Technical Studies Greenhouse Gas Analysis (GHGA) is summarized below based on the significance criteria in Section 3 of this report consistent with Appendix G of the California Environmental Quality Act (CEQA Guidelines (1). Table ES-1 shows the findings of significance for potential greenhouse gas (GHG) impacts under CEQA.
TABLE ES-1: SUMMARY OF CEQA SIGNIFICANCE FINDINGS
Report
Significance Findings
Analysis
Section
Unmitigated
Mitigated
GHG Impact #1: Would the Project
generate direct or indirect GHG emission
3.8 Less Than Significant
N/A
that would result in a significant impact
on the environment?
GHG Impact #2: Would the Project conflict
with any applicable plan, policy or
regulation of an agency adopted for the
3.8 Less Than Significant
N/A
purpose of reducing the emissions of
GHGs?
ES.2 PROJECT REQUIREMENTS
The Project would be required to comply with regulations imposed bythe State of California and the South Coast Air Quality Management District (SCAQMD) aimed at the reduction of air pollutant emissions. Those that are directly and indirectly applicable to the Project and that would assist in the reduction of GHG emissions include:
• California Global Warming Solutions Act of 2006: Emissions Limit (SB 32) (2). • Regional GHG Emissions Reduction Targets/Sustainable Communities Strategies (Senate Bill (SB) 375) (3).
• Pavley Fuel Efficiency Standards (AB 1493). Establishes fuel efficiency ratings for new vehicles (4).
• California Building Code (Title 24 California Code of Regulations (CCR)). Establishes energy efficiency requirements for new construction (5).
• Appliance Energy Efficiency Standards (Title 20 CCR). Establishes energy efficiency requirements for appliances (6).
• Low Carbon Fuel Standard (LCFS). Requires carbon content of fuel sold in California to be 20% less by 2030 (7).
• California Water Conservation in Landscaping Act of 2006 (AB 1881). Requires local agencies to adopt the Department of Water Resources Model Water Efficient Landscape Ordinance, or equivalent, to ensure efficient landscapes in new development and reduced water waste in existing landscapes (8).
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• Statewide Retail Provider Emissions Performance Standards. Requires energy generators to achieve performance standards for GHG emissions (9).
• Renewable Portfolio Standards (RPS). Requires electric corporations to increase the amount of energy obtained from eligible renewable energy resources to 60 percent by 2030, with interim targets of 44 percent by 2024 and 52 percent by 2027 as well (10).
Promulgated regulations that will affect the Project's emissions are accounted for in the Project's GHG calculations provided in this report. In particular, AB 1493, LCFS, and RPS, and therefore are accounted for in the Project's emission calculations.
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1 INTRODUCTION
This report presents the results of the Greenhouse Gas Analysis (GHGA) prepared by Urban Crossroads, Inc., for the proposed Rockwell Technical Studies ("Project"). The purpose of this GHGA is to evaluate Project -related construction and operational emissions and determine the level of greenhouse gas (GHG) impacts as a result of constructing and operating the proposed Project.
1.1 SITE LOCATION
The Project site is located on the northeast corner of 12t" street and Avenue E in the City of Yucaipa, as shown on Exhibit 1-A. The closest major airport is the Redlands Municipal Airport located roughly 5 miles northwest of the Project site.
1.2 PROJECT DESCRIPTION
The Project is proposing to subdivide 14.78 acres into 128 lots for a residential development, as shown on Exhibit 1-13. The Project site consists of three (3) existing parcels: Accessor's Parcel Numbers (APNs) 0318-021-18, -19, and -58. The Project site is vacant on two (2) parcels (APN 0318-021-18 and -19) and contains a single-family residence with horse corrals on one (1) parcel (APN 0318-021-58). The Project is anticipated to be fully developed within a single phase by year 2025.
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EXHIBIT 1-A: LOCATION MAP
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EXHIBIT 1-B: SITE PLAN
11 Rockwell Technical Studies Greenhouse Gas Analysis
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2 CLIMATE CHANGE SETTING
2.1 INTRODUCTION TO GLOBAL CLIMATE CHANGE (GCC)
GCC is defined as the change in average meteorological conditions on the earth with respect to temperature, precipitation, and storms. The majority of scientists believe that the climate shift taking place since the Industrial Revolution is occurring at a quicker rate and magnitude than in the past. Scientific evidence suggests that GCC is the result of increased concentrations of GHGs in the earth's atmosphere, including carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), and fluorinated gases. The majority of scientists believe that this increased rate of climate change is the result of GHGs resulting from human activity and industrialization over the past 200 years.
An individual project like the proposed Project evaluated in this GHGA cannot generate enough GHG emissions to affect a discernible change in global climate. However, the proposed Project may participate in the potential for GCC by its incremental contribution of GHGs combined with the cumulative increase of all other sources of GHGs, which when taken together constitute potential influences on GCC. Because these changes may have serious environmental consequences, Section 3.0 will evaluate the potential for the proposed Project to have a significant effect upon the environment as a result of its potential contribution to the greenhouse effect.
2.2 GLOBAL CLIMATE CHANGE DEFINED
GCC refers to the change in average meteorological conditions on the earth with respect to temperature, wind patterns, precipitation, and storms. Global temperatures are regulated by naturally occurring atmospheric gases such as water vapor, CO2, N2O, CH4, hydrofluorocarbons (HFCs), perfluorocarbons (PFCs), and sulfur hexafluoride (SF6). These particular gases are important due to their residence time (duration they stay) in the atmosphere, which ranges from 10 years to more than 100 years. These gases allow solar radiation into the earth's atmosphere, but prevent radioactive heat from escaping, thus warming the earth's atmosphere. GCC can occur naturally as it has in the past with the previous ice ages.
Gases that trap heat in the atmosphere are often referred to as GHGs. GHGs are released into the atmosphere by both natural and anthropogenic activity. Without the natural GHG effect, the earth's average temperature would be approximately 61 degrees Fahrenheit (°F) cooler than it is currently. The cumulative accumulation of these gases in the earth's atmosphere is considered to be the cause for the observed increase in the earth's temperature.
2.3 GHGs
2.3.1 GHGS AND HEALTH EFFECTS
GHGs trap heat in the atmosphere, creating a GHG effect that results in global warming and climate change. Many gases demonstrate these properties and as discussed in Table 2-1. For the purposes of this analysis, emissions of CO2, CH4, and N2O were evaluated (see Table 3-1 later in this report) because these gases are the primary contributors to GCC from development projects. 15223-03 GHG Report
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Although there are other substances such as fluorinated gases that also contribute to GCC, these fluorinated gases were not evaluated as their sources are not well-defined and do not contain accepted emissions factors or methodology to accurately calculate these gases.
TABLE 2-1: GHGS
GHGs
Description
Sources
Health Effects
Water
Water is the most abundant,
The main source of
There are no known direct
important, and variable GHG in
water vapor is
health effects related to
the atmosphere. Water vapor is
evaporation from
water vapor at this time. It
not considered a pollutant; in
the oceans
should be noted however
the atmosphere it maintains a
(approximately
that when some pollutants
climate necessary for life.
85%). Other sources
react with water vapor, the
Changes in its concentration are
include evaporation
reaction forms a transport
primarily considered to be a
from other water
mechanism for some of
result of climate feedbacks
bodies, sublimation
these pollutants to enter the
related to the warming of the
(change from solid to
human body through water
atmosphere rather than a direct
gas) from sea ice and
vapor.
result of industrialization.
snow, and
Climate feedback is an indirect,
transpiration from
or secondary, change, either
plant leaves.
positive or negative, that occurs
within the climate system in
response to a forcing
mechanism. The feedback loop
in which water is involved is
critically important to projecting
future climate change.
As the temperature of the
atmosphere rises, more water is
evaporated from ground storage
(rivers, oceans, reservoirs, soil).
Because the air is warmer, the
relative humidity can be higher
(in essence, the air is able to
'hold' more water when it is
warmer), leading to more water
vapor in the atmosphere. As a
GHG, the higher concentration of
water vapor is then able to
absorb more thermal indirect
energy radiated from the Earth,
thus further warming the
atmosphere. The warmer
atmosphere can then hold more
water vapor and so on and so
on. This is referred to as a
"positive feedback loop." The
extent to which this positive
feedback loop would continue is
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GHGs
Description
Sources
Health Effects
unknown as there are also
dynamics that hold the positive
feedback loop in check. As an
example, when water vapor
increases in the atmosphere,
more of it would eventually
condense into clouds, which are
more able to reflect incoming
solar radiation (thus allowing
less energy to reach the earth's
surface and heat it up) (11).
CO2
CO2 is an odorless and colorless
CO2 is emitted from
Outdoor levels of CO2 are not
GHG. Since the industrial
natural and
high enough to result in
revolution began in the mid-
manmade sources.
negative health effects.
1700s, the sort of human activity
Natural sources
that increases GHG emissions
include: the
According to the National
has increased dramatically in
decomposition of
Institute for Occupational
scale and distribution. Data from
dead organic matter;
Safety and Health (NIOSH)
the past 50 years suggests a
respiration of
high concentrations of CO2
corollary increase in levels and
bacteria, plants,
can result in health effects
concentrations. As an example,
animals, and fungus;
such as: headaches,
prior to the industrial revolution,
evaporation from
CO2 concentrations were fairly
oceans; and volcanic
dizziness, restlessness,
stable at 280 parts per million
outgassing.
difficulty breathing,
(ppm). Today, they are around
Anthropogenic
sweating, increased heart
370 ppm, an increase of more
sources include: the
rate, increased cardiac
than 30%. Left unchecked, the
burning of coal, oil,
output, increased blood
concentration of CO2 in the
natural gas, and
pressure, coma, asphyxia,
atmosphere is projected to
wood. CO2 is
and/or convulsions. It should
increase to a minimum of 540
naturally removed
ppm by 2100 as a direct result of
from the air by
be noted that current
anthropogenic sources (12).
photosynthesis,
concentrations of CO2 in the
dissolution into
earth's atmosphere are
ocean water,
estimated to be
transfer to soils and
approximately 370 ppm, the
ice caps, and
actual reference exposure
chemical weathering
level (level at which adverse
of carbonate rocks
(13).
health effects typically
occur) is at exposure levels
of 5,000 ppm averaged over
10 hours in a 40-hour
workweek and short-term
reference exposure levels of
30,000 ppm averaged over a
15 minute period (14).
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GHGs I Description I Sources I Health Effects
CH4 CH4 is an extremely effective
absorber of radiation, although
its atmospheric concentration is
less than CO2and its lifetime in
the atmosphere is brief (10-12
years), compared to other GHGs
N20 N20, also known as laughing gas,
is a colorless GHG.
Concentrations of N20 also
began to rise at the beginning of
the industrial revolution. In
1998, the global concentration
was 314 parts per billion (ppb).
CH4 has both natural
and anthropogenic
sources. It is
released as part of
the biological
processes in low
oxygen
environments, such
as in swamplands or
in rice production (at
the roots of the
plants). Over the last
50 years, human
activities such as
growing rice, raising
cattle, using natural
gas, and mining coal
have added to the
atmospheric
concentration of
CH4. Other
anthropocentric
sources include
fossil -fuel
combustion and
biomass burning
(15).
N20 is produced by
microbial processes
in soil and water,
including those
reactions which
occur in fertilizer
containing nitrogen.
In addition to
agricultural sources,
some industrial
processes (fossil
fuel -fired power
plants, nylon
production, nitric
acid production, and
vehicle emissions)
also contribute to its
atmospheric load. It
is used as an aerosol
spray propellant, i.e.,
in whipped cream
CH4 is extremely reactive
with oxidizers, halogens, and
other halogen -containing
compounds. Exposure to
elevated levels of CH4 can
cause asphyxiation, loss of
consciousness, headache
and dizziness, nausea and
vomiting, weakness, loss of
coordination, and an
increased breathing rate.
N20 can cause dizziness,
euphoria, and sometimes
slight hallucinations. In small
doses, it is considered
harmless. However, in some
cases, heavy and extended
use can cause Olney's
Lesions (brain damage) (16).
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GHGs
Description
Sources
Health Effects
bottles. It is also
used in potato chip
bags to keep chips
fresh. It is used in
rocket engines and
in race cars. N20 can
be transported into
the stratosphere, be
deposited on the
earth's surface, and
be converted to
other compounds by
chemical reaction
(16).
Chlorofluorocarbons
CFCs are gases formed
CFCs have no natural
In confined indoor locations,
(CFCs)
synthetically by replacing all
source but were first
working with CFC-113 or
hydrogen atoms in CH4 or ethane
synthesized in 1928.
other CFCs is thought to
(C2H6) with chlorine and/or
They were used for
result in death by cardiac
refrigerants, aerosol
arrhythmia (heart frequency
fluorine atoms. CFCs are
propellants and
too high or too low) or
nontoxic, nonflammable,
cleaning solvents.
asphyxiation.
insoluble and chemically
Due to the discovery
unreactive in the troposphere
that they are able to
(the level of air at the earth's
destroy
surface).
stratospheric ozone,
a global effort to halt
their production was
undertaken and was
extremely
successful, so much
so that levels of the
major CFCs are now
remaining steady or
declining. However,
their long
atmospheric
lifetimes mean that
some of the CFCs
would remain in the
atmosphere for over
100 years (17).
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GHGs
Description
Sources
Health Effects
HFCs
HFCs are synthetic, man-made
HFCs are manmade
No health effects are known
chemicals that are used as a
for applications such
to result from exposure to
substitute for CFCs. Out of all the
as automobile air
HFCs.
GHGs, they are one of three
conditioners and
groups with the highest global
refrigerants.
warming potential (GWP). The
HFCs with the largest measured
atmospheric abundances are (in
order), Fluoroform (HFC-23),
1,1,1,2-tetrafluoroethane (HFC-
134a), and 1,1-difluoroethane
(HFC-152a). Prior to 1990, the
only significant emissions were
of HFC-23. HCF-134a emissions
are increasing due to its use as a
refrigerant.
PFCs
PFCs have stable molecular
The two main
No health effects are known
structures and do not break
sources of PFCs are
to result from exposure to
down through chemical
primary aluminum
PFCs.
processes in the lower
production and
atmosphere. High-energy
semiconductor
ultraviolet rays, which occur
manufacture.
about 60 kilometers above
earth's surface, are able to
destroy the compounds. Because
of this, PFCs have exceptionally
long lifetimes, between 10,000
and 50,000 years. Two common
PFCs are tetrafluoromethane
(CF4) and hexafluoroethane
(C2F6). The EPA estimates that
concentrations of CF4 in the
atmosphere are over 70 parts
per trillion (ppt).
SF6
SF6 is an inorganic, odorless,
SF6 is used for
In high concentrations in
colorless, nontoxic,
insulation in electric
confined areas, the gas
nonflammable gas. It also has
power transmission
presents the hazard of
the highest GWP of any gas
and distribution
suffocation because it
evaluated (23,900) (18). The EPA
equipment, in the
displaces the oxygen needed
indicates that concentrations in
magnesium industry,
for breathing.
the 1990s were about 4 ppt.
in semiconductor
manufacturing, and
as a tracer gas for
leak detection.
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GHGs
Description
Sources
Health Effects
Nitrogen Trifluoride
NF3 is a colorless gas with a
NF3 is used in
Long-term or repeated
(NF3)
distinctly moldy odor. The World
industrial processes
exposure may affect the liver
Resources Institute (WRI)
and is produced in
and kidneys and may cause
indicates that NF3 has a 100-year
the manufacturing of
fluorosis (20).
GWP of 17,200 (19).
semiconductors,
Liquid Crystal Display
(LCD) panels, types
of solar panels, and
chemical lasers.
The potential health effects related directly to the emissions of CO2, CH4, and N20 as they relate to development projects such as the proposed Project are still being debated in the scientific community. Their cumulative effects to GCC have the potential to cause adverse effects to human health. Increases in Earth's ambient temperatures would result in more intense heat waves, causing more heat -related deaths. Scientists also purport those higher ambient temperatures would increase disease survival rates and result in more widespread disease. Climate change would likely cause shifts in weather patterns, potentially resulting in devastating droughts and food shortages in some areas (21). Exhibit 2-A presents the potential impacts of global warming (22).
EXHIBIT 2-A: SUMMARY OF PROJECTED GLOBAL WARMING IMPACT, 2070-2099 (AS COMPARED WITH 1961-1990) 13'F 90% loss in Sierra snowpack
22-30 inches of sea level rise
12 3-4 times as many heatwave days in major urban centers 4-6 times as many heat -related deaths in major urban centers 11 2.5 times more critically dry years
Higher 20% increase in energy demand
Higher
10 Warming Range
Emissions
Scenario
70-80%loss in Sierra snowpack
_
y
• 14-22 inches of sea level rise
8 2.5-4 times as many heat wave days in major urban centers 2-6 times as many heat -related deaths in major urban centers Medium-
High
Medium 75-85% increase indays conducive toozone formation* 7 Emissions
Warming Range
(5.5-SoF) 2-2.5 times more critically dry years
Scenario
6 10% increase in electricity demand
30%decrease in forest yields (pine)
5 55% increase in the expected risk of large wildfires
Lower
Emissions
Scenario
4 Lower 30-60°k loss in Sierra snowpack
Warming Range
6-14 inches of sea level rise
3 (3-5.5°F)
2-2.5 times as many heat wave days in major urban centers 2 2-3 times as many heat -related deaths in major urban centers 25-35% increase in days conducive to ozone formation*
1 Up to 1.5 times more critically dry years
3-6 % increase in electricity demand
0 7-14%decrease in forest yields (pine)
10-35% increase in the risk of large wildfires
*For high ozone locations in Los Angeles (Riverside) and the San Joaquin Valley (Visalia) Source: Barbara H. Allen -Diaz. "Climate change affects us all." University of California, Agriculture and Natural Resources, 2009. 15223-03 GHG Report
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2.4 GLOBAL WARMING POTENTIAL
GHGs have varying GWP values. GWP of a GHG indicates the amount of warming a gas cause over a given period of time and represents the potential of a gas to trap heat in the atmosphere. CO2 is utilized as the reference gas for GWP, and thus has a GWP of 1. CO2 equivalent (CO2e) is a term used for describing the difference GHGs in a common unit. CO2e signifies the amount of CO2 which would have the equivalent GWP.
The atmospheric lifetime and GWP of selected GHGs are summarized at Table 2-2. As shown in the table below, GWP for the 6th Assessment Report, the Intergovernmental Panel on Climate Change (IPCC)'s scientific and socio-economic assessment on climate change, range from 1 for CO2 to 25,200 for SF6 (23).
TABLE 2-2: GWP AND ATMOSPHERIC LIFETIME OF SELECT GHGS
Gas
Atmospheric Lifetime
(years)
GWP (100-year time horizon)
6th Assessment Report
CO2
Multiple
1 CH4
12.4 28
N20
121
273
H FC-23
222
14,600
H FC-134a
13.4 1,526
HFC-152a
1.5 164
SF6
3,200
25,200
Source: IPCC Second Assessment Report, 1995 and IPCC Sixth Assessment Report, 2022
2.5 GREENHOUSE GAS EMISSIONS INVENTORIES
2.5.1 GLOBAL
Worldwide anthropogenic GHG emissions are tracked by the IPCC for industrialized nations (referred to as Annex 1) and developing nations (referred to as Non -Annex 1). Human GHG emissions data for Annex I nations are available through 2020. Based on the latest available data, the sum of these emissions totaled approximately 28,026,643 gigagram (Gg) CO2e' (24) (25) as summarized on Table 2-3.
The global emissions are the sum of Annex I and non -Annex I countries, without counting Land -Use, Land -Use Change and Forestry (LULUCF).
For countries without 2020 data, the United Nations' Framework Convention on Climate Change (UNFCCC) data for the most recent year were used U.N. Framework Convention on Climate Change, "Annex I Parties —GHG total without LULUCF," The most recent GHG emissions for China and India are from 2014 and 2016, respectively. 15223-03 GHG Report
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2.5.2 UNITED STATES
As noted in Table 2-3, the United States, as a single country, was the number two producer of GHG emissions in 2020.
TABLE 2-3: TOP GHG PRODUCING COUNTRIES AND THE EUROPEAN UNION 2 Emitting Countries
GHG Emissions (Gg COZe)
China
12,300,200
United States
5,981,354
European Union (27-member countries)
3,706,110
India
2,839,420
Russian Federation
2,051,437
Japan
1,148,122
Total
28,026,643
2.5.3 STATE OF CALIFORNIA
California has significantly slowed the rate of growth of GHG emissions due to the implementation of energy efficiency programs as well as adoption of strict emission controls but is still a substantial contributor to the United States (U.S.) emissions inventory total (26). The California Air Resource Board (CARB) compiles GHG inventories for the State of California. Based upon the 2022 GHG inventory data (i.e., the latest year for which data are available) for the 2000- 2020 GHG emissions period, California emitted an average 369.2 million metric tons of CO2e per year (MMTCO2e/yr) or 369,200 Gg CO2e (6.17% of the total United States GHG emissions) (27).
2.6 REGULATORY SETTING
2.6.1 FEDERAL
Prior to the last decade, there have been no concrete federal regulations of GHGs or major planning for climate change adaptation. The following are actions regarding the federal government, GHGs, and fuel efficiency.
GHG Endangerment. In Massachusetts v. Environmental Protection Agency 549 U.S. 497 (2007), decided on April 2, 2007, the Supreme Court found that four GHGs, including CO2, are air pollutants subject to regulation under Section 202(a)(1) of the federal Clean Air Act (CAA). The Court held that the EPA Administrator must determine whether emissions of GHGs from new motor vehicles cause or contribute to air pollution, which may reasonably be anticipated to endanger public health or welfare, or whether the science is too uncertain to make a reasoned 2 Used http://unfcCc.int data for Annex I countries. Consulted the CAIT Climate Data Explorer in his:// www.climatewatchdata.org site to reference Non -Annex I countries of China and India.
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decision. On December 7, 2009, the EPA Administrator signed two distinct findings regarding GHGs under section 202(a) of the CAA:
• Endangerment Finding: The Administrator finds that the current and projected concentrations of the six key well -mixed GHGs— CO2, CH4, N20, HFCs, PFCs, and SF6—in the atmosphere threaten the public health and welfare of current and future generations. • Cause or Contribute Finding: The Administrator finds that the combined emissions of these well - mixed GHGs from new motor vehicles and new motor vehicle engines contribute to the GHG pollution, which threatens public health and welfare.
These findings do not impose requirements on industry or other entities. However, this was a prerequisite for implementing GHG emissions standards for vehicles, as discussed in the section "Clean Vehicles" below (28).
Clean Vehicles. Congress first passed the Corporate Average Fuel Economy law in 1975 to increase the fuel economy of cars and light duty trucks. The law has become more stringent over time. In 2010, the EPA and the Department of Transportation's National Highway Traffic Safety Administration (NHTSA) announced a joint final rule establishing a national program that would reduce GHG emissions and improve fuel economy for new cars and trucks sold in the U.S.
The first phase of the national program applied to passenger cars, light -duty trucks, and medium - duty (MD) passenger vehicles, covering model years 2012 through 2016. The program required these vehicles to meet an estimated combined average emissions level of 250 grams of CO2 per mile, equivalent to 35.5 miles per gallon (mpg), if the automobile industry were to meet this CO2 level solely through fuel economy improvements. Together, these standards were estimated to reduce CO2 emissions by an estimated 960 million metric tons and save 1.8 billion barrels of oil over the lifetime of the vehicles sold under the program (model years 2012-2016). The EPA and the NHTSA issued final rules on a second -phase joint rulemaking establishing national standards for light -duty vehicles for model years 2017 through 2025 in August 2012. The new standards for model years 2017 through 2025 apply to passenger cars, light -duty trucks, and MD passenger vehicles. The final standards are projected to result in an average industry fleetwide level of 163 grams/mile of CO2 in model year 2025, which is equivalent to 54.5 mpg if achieved exclusively through fuel economy improvements.
The EPA and the U.S. Department of Transportation issued final rules for the first national standards to reduce GHG emissions and improve fuel efficiency of heavy-duty trucks (HDT) and buses in 2011. For combination tractors, the agencies are proposing engine and vehicle standards that begin in the 2014 model year and achieve up to a 20% reduction in CO2 emissions and fuel consumption by the 2018 model year. For HDT and vans, the agencies are proposing separate gasoline and diesel truck standards, which phase in starting in the 2014 model year and achieve up to a 10% reduction for gasoline vehicles and a 15% reduction for diesel vehicles by the 2018 model year (12 and 17% respectively if accounting for air conditioning leakage). Lastly, for vocational vehicles, the engine and vehicle standards would achieve up to a 10% reduction in fuel consumption and CO2 emissions from the 2014 to 2018 model years. ` 1 URBAN
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On April 2, 2018, the EPA signed the Mid-term Evaluation Final Determination, which declared that the MY 2022-2025 GHG standards are not appropriate and should be revised (29). This Final Determination serves to initiate a notice to further consider appropriate standards for MY 2022- 2025 light -duty vehicles. On August 2, 2018, the NHTSA in conjunction with the EPA, released a notice of proposed rulemaking, the Safer Affordable Fuel -Efficient (SAFE) Vehicles Rule for Model Years 2021-2026 Passenger Cars and Light Trucks (SAFE Vehicles Rule). The SAFE Vehicles Rule was proposed to amend exiting Corporate Average Fuel Economy (CAFE) and tailpipe CO2 standards for passenger cars and light trucks and to establish new standards covering model years 2021 through 2026. As of March 31, 2020, the NHTSA and EPA finalized the SAFE Vehicle Rule, which set new CAFE standards and requires a 1.5% improvement in vehicle fuel efficiency each year through model year 2026 (30).
As of January 2021, Executive Order 13990 directed the EPA to reconsider the EPA's 2019 action titled "The Safer Affordable Fuel -Efficient Vehicles Rule Part One: One National Program Rule (SAFE-1)" for the purposes of rescinding the action taken by the prior administration (31).
Mandatory Reporting of GHGs. The Consolidated Appropriations Act of 2008 requires the establishment of mandatory GHG reporting requirements. The rule requires reporting of GHG emissions from large sources and suppliers in the U.S. and is intended to collect accurate and timely emissions data to inform future policy decisions. Under the rule, suppliers of fossil fuels or industrial GHGs, manufacturers of vehicles and engines, and facilities that emit 25,000 metric tons per year (MT/yr) or more of GHG emissions are required to submit annual reports to the E PA.
New Source Review. The EPA final rule establishes thresholds for GHGs that define when permits under the New Source Review Prevention of Significant Deterioration and Title V Operating Permit programs are required for new and existing industrial facilities. This final rule "tailors" the requirements of these CAA permitting programs to limit which facilities will be required to obtain Prevention of Significant Deterioration and Title V permits. In the preamble to the revisions to the Federal Code of Regulations, the EPA states:
"This rulemaking is necessary because without it the Prevention of Significant Deterioration and Title V requirements would apply, as of January 2, 2011, at the 100 or 250 tons per year levels provided under the CAA, greatly increasing the number of required permits, imposing undue costs on small sources, overwhelming the resources of permitting authorities, and severely impairing the functioning of the programs. EPA is relieving these resource burdens by phasing in the applicability of these programs to GHG sources, starting with the largest GHG emitters. This rule establishes two initial steps of the phase -in. The rule also commits the agency to take certain actions on future steps addressing smaller sources but excludes certain smaller sources from Prevention of Significant Deterioration and Title V permitting for GHG emissions until at least April 30, 2016."
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The EPA estimates that facilities responsible for nearly 70% of the national GHG emissions from stationary sources will be subject to permitting requirements under this rule. This includes the nation's largest GHG emitters —power plants, refineries, and cement production facilities.
SmartWay Program. The SmartWay Program is a public -private initiative between the EPA, large and small trucking companies, rail carriers, logistics companies, commercial manufacturers, retailers, and other federal and state agencies. Its purpose is to improve fuel efficiency and the environmental performance (reduction of both GHG emissions and air pollution) of the goods movement supply chains. SmartWay is comprised of four components (32):
1. SmartWay Transport Partnership: A partnership in which freight carriers and shippers commit to benchmark operations, track fuel consumption, and improve performance annually.
2. SmartWay Technology Program: A testing, verification, and designation program to help freight companies identify equipment, technologies, and strategies that save fuel and lower emissions.
3. SmartWay Vehicles: A program that ranks light -duty cars and small trucks and identifies superior environmental performers with the SmartWay logo.
4. SmartWay International Interests: Guidance and resources for countries seeking to develop freight sustainability programs modeled after SmartWay.
SmartWay effectively refers to requirements geared towards reducing fuel consumption. Most large trucking fleets driving newer vehicles are compliant with SmartWay design requirements.
Moreover, over time, all HDTs will have to comply with the CARB GHG Regulation that is designed with the SmartWay Program in mind, to reduce GHG emissions by making them more fuel - efficient. For instance, in 2015, 53 foot or longer dry vans or refrigerated trailers equipped with a combination of SmartWay-verified low -rolling resistance tires and SmartWay-verified aerodynamic devices would obtain a total of 10% or more fuel savings over traditional trailers.
Through the SmartWay Technology Program, the EPA has evaluated the fuel saving benefits of various devices through grants, cooperative agreements, emissions and fuel economy testing, demonstration projects and technical literature review. As a result, the EPA has determined the following types of technologies provide fuel saving and/or emission reducing benefits when used properly in their designed applications, and has verified certain products:
• Idle reduction technologies — less idling of the engine when it is not needed would reduce fuel consumption.
• Aerodynamic technologies minimize drag and improve airflow over the entire tractor -trailer vehicle. Aerodynamic technologies include gap fairings that reduce turbulence between the tractor and trailer, side skirts that minimize wind under the trailer, and rear fairings that reduce turbulence and pressure drop at the rear of the trailer. • Low rolling resistance tires can roll longer without slowing down, thereby reducing the amount of fuel used. Rolling resistance (or rolling friction or rolling drag) is the force resisting the motion when a tire rolls on a surface. The wheel will eventually slow down because of this resistance. • Retrofit technologies include things such as diesel particulate filters, emissions upgrades (to a higher tier), etc., which would reduce emissions.
• Federal excise tax exemptions.
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2.6.2 STATE
2.7.3.1 EXECUTIVE ORDERS RELATED To GHG EMISSIONS
California's Executive Branch has issued several Executive Orders (EO) to state agencies to reduce GHGs. EO are not legally enforceable on local governments or the private sector. Although not regulatory and not directly applicable to development projects, they set the tone for the state and guide the actions of state agencies.
EXECUTIVE ORDER S-3-05
Executive Order (EO) S-3-05 initiated the State's formal efforts to reduce GHG emissions and set the following reduction targets for GHG emissions:
• By 2010, reduce GHG emissions to 2000 levels.
• By 2020, reduce GHG emissions to 1990 levels.
• By 2050, reduce GHG emissions to 80% below 1990 levels.
The 2050 reduction goal represents what some scientists believe is necessary to reach levels that will stabilize the climate. The 2020 goal was established to be a mid-term target.
EXECUTIVE ORDER S-01-07
EO S-01-07 mandates a statewide goal to reduce the carbon intensity of California's transportation fuels by at least 10% by 2020. CARB adopted the Low Carbon Fuel Standard (LCFS) to achieve the 10% reduction in GHG emissions from the transportation fuels sector by 2020.
EXECUTIVE ORDER S-13-08
EO S-13-08 requires the creation of the California Climate Adaptation Strategy (CCAS), the first of which was adopted. Objectives include analyzing risks of climate change in California, identifying and exploring strategies to adapt to climate change, and specifying a direction for future research.
EXECUTIVE ORDER B-30-15
EO B-30-15 establishes a California GHG reduction target of 40% below 1990 levels by 2030. The new interim statewide GHG emission reduction target is set at a level to ensure California meets its 2050 target of reducing GHG emissions 80% below 1990 levels. EO B-30-15 directs CARB to update the State Climate Change Scoping Plan to include a 2030 target in terms of millions of MT CO2e. EO B-30-15 also requires the CCAS to be updated every three years, and for the State to continue its climate change research program, among other provisions.
EXECUTIVE ORDER B-55-18
Executive Order B-55-18 establishes a Statewide policy to achieve carbon neutrality by 2045 and maintain net negative emissions thereafter. As per Executive Order B-55-18, CARB is directed to work with relevant State agencies to develop a framework for implementation and accounting that tracks progress toward this goal and to ensure future Climate Change Scoping Plans identify and recommend measures to achieve the carbon neutrality goal. ` 1 URBAN
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EXECUTIVE ORDER N-79-20
EO N-79-20 sets new statewide goals for phasing out gasoline -powered cars and trucks in California. Under EO N-79-20, 100% of in -state sales of new passenger cars and trucks are to be zero -emission by 2035; 100% of in -state sales of medium- and heavy-duty trucks and busses are to be zero -emission by 2045, where feasible; and 100% of off -road vehicles and equipment sales are to be zero -emission by 2035, where feasible. EO-79-20 directs CARB and other state agencies to develop regulations or take other steps within existing authority to achieve these goals.
2.7.3.1 LEGISLATIVE ACTIONS TO REDUCE GHGS
The State of California legislature has enacted a series of bills that constitute the most aggressive program to reduce GHGS of any state in the nation. Some legislation such as Global Warming Solutions Act of 2006 (A1332) and the Global Warming Solutions Act of 2006: Emissions Limit (SB 32) which were specifically enacted to address GHG emissions and the 2020 and 2030 targets identified in EO S-3-05and B-30-15.
GLOBAL WARMING SOLUTIONS ACT OF 2006 (AB 32)
In 2006, the State Legislature enacted AB 32, the California Global Solutions Act of 2006 (HSC §38500-38599), which requires that GHGS emitted in California be reduced to 1990 levels by the year 2020 (this goal has been met since 20163). GHGS as defined under AB 32 include CO2, CH4, N20, HFCs, PFCs, and SF6. Since AB32 was enacted, a seventh chemical, nitrogen trifluoride, has also been added to the list of GHGS. CARB is the state agency charged with monitoring and regulating sources of GHGS. AB 32 states the following:
"Global warming poses a serious threat to the economic well-being, public health, natural resources, and the environment of California. The potential adverse impacts of global warming include the exacerbation of air quality problems, a reduction in the quality and supply of water to the state from the Sierra snowpack, a rise in sea levels resulting in the displacement of thousands of coastal businesses and residences, damage to marine ecosystems and the natural environment, and an increase in the incidences of infectious diseases, asthma, and other human health -related problems."
GLOBAL WARMING SOLUTIONS ACT OF 2006: EMISSIONS LIMIT (SB 32) In September 2016, the State Legislature enacted SB 32, the California Global Warming Solutions Act of 2006: Emissions Limit (HSC §38566). SB 32 requires the state to reduce statewide GHG emissions to 40% below 1990 levels by 2030, a reduction target that was first introduced in Executive Order B-30-15. The new legislation builds upon AB 32 and provides an intermediate goal to achieving S-3-05, which sets a statewide GHG reduction target of 80% below 1990 levels by 2050 (33).
3 Based upon the 2021 GHG inventory data (i.e., the latest year for which data are available) for the 2000-2019 GHG emissions period, California emitted less than the 2020 emissions target of 431 million MT CO2e in 2016 and each year after that.
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THE SUSTAINABLE COMMUNITIES AND CLIMATE PROTECTION ACT OF 2008 (SB 375) According to SB 375, the transportation sector is the largest contributor of GHG emissions, which emits over 40% of the total GHG emissions in California. SB 375 states, "Without improved land use and transportation policy, California will not be able to achieve the goals of AB 32." SB 375 does the following: it (1) requires metropolitan planning organizations to include sustainable community strategies in their regional transportation plans for reducing GHG emissions, (2) aligns planning for transportation and housing, and (3) creates specified incentives for the implementation of the strategies.
Concerning CEQA, SB 375, as codified in Public Resources Code Section 21159.28, states that CEQA findings for certain projects are not required to reference, describe, or discuss (1) growth inducing impacts, or (2) any project -specific or cumulative impacts from cars and light -duty truck trips generated by the project on global warming or the regional transportation network, if the project:
1. Is in an area with an approved sustainable communities strategy or an alternative planning strategy that the CARB accepts as achieving the GHG emission reduction targets.
2. Is consistent with that strategy (in designation, density, building intensity, and applicable policies).
3. Incorporates the mitigation measures required by an applicable prior environmental document.
VEHICULAR EMISSIONS: GREENHOUSE GASES (AB 1493)
Enacted on July 22, 2002, California AB 1493, also known as the Pavley Fuel Efficiency Standards, required CARB to develop and adopt regulations that reduce GHGs emitted by passenger vehicles and light duty trucks. Implementation of the regulation was delayed by lawsuits filed by automakers and by the EPA's denial of an implementation waiver. The EPA subsequently granted the requested waiver in 2009, which was upheld by the U.S. District Court for the District of Columbia in 2011.
The standards phase in during the 2009 through 2016 MY. Several technologies stand out as providing significant reductions in emissions at favorable costs. These include discrete variable valve lift or camless valve actuation to optimize valve operation rather than relying on fixed valve timing and lift as has historically been done; turbocharging to boost power and allow for engine downsizing; improved multi -speed transmissions; and improved air conditioning systems that operate optimally, leak less, and/or use an alternative refrigerant.
The second phase of the implementation for the Pavley bill was incorporated into Amendments to the Low -Emission Vehicle Program (LEV III) or the Advanced Clean Cars (ACC) program. The ACC program combines the control of smog -causing pollutants and GHG emissions into a single coordinated package of requirements for MY 2017 through 2025. The regulation would reduce GHGs from new cars by 34% from 2016 levels by 2025. The new rules would clean up gasoline and diesel -powered cars, and deliver increasing numbers of zero -emission technologies, such as full battery electric cars, newly emerging plug-in hybrid electric vehicles (EV) and hydrogen fuel cell cars. The package would also ensure adequate fueling infrastructure is available for the increasing numbers of hydrogen fuel cell vehicles planned for deployment in California. `1 URBAN
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CALIFORNIA RENEWABLES PORTFOLIO STANDARD PROGRAM: EMISSIONS OF GREENHOUSE GASES The State Renewable Portfolio Standard (RPS) was initially established by SB 1078. SB 1078 required electricity providers to increase procurement of electricity from renewable energy sources by at least one percent per year with the goal of reaching 20 percent renewables by 2017.
SB 107 accelerated the 20 percent RPS requirement from 2017 to 2010. Subsequently, SB 2 (1X) increased the RPS requirements to 33 percent renewables by 2020 with compliance period targets of 20 percent by 2013 and 25 percent by 2016. SB 350 further increases the RPS requirement to 50 percent by 2030, with interim targets of 40 percent by 2024 and 45 percent by 2027. In addition, the bill requires that 65 percent of RPS procurement must be derived from long-term contracts (10 years or more) starting in 2021. The most recent change is from SB 100, which increases RPS requirements to 60 percent by 2030, with new interim targets of 44 percent by 2024 and 52 percent by 2027 as well. The bill further requires that all of the state's electricity come from carbon -free resources (not only RPS-eligible ones) by 2045.
MODEL WATER EFFICIENT LANDSCAPING ORDINANCE
The Model Water Efficient Landscaping Ordinance (MWELO) was enacted by AB 1881, the Water Conservation Act. AB 1881 required local agencies to adopt a local landscape ordinance at least as effective in conserving water as the Model Ordinance by January 1, 2010. EO B-29-15 directs DWR to update the MELOW through expedited regulation. The California Water Commission approved the revised MELOW became effective December 15, 2015, which requires new development projects that include landscape areas of 500 sf to implement:
• More efficient irrigation systems;
• Incentives for graywater usage;
• Improvements in on -site stormwater capture;
• Limiting the portion of landscapes that can be planted with high water use plants; and • Includes reporting requirements for local agencies.
SB 97 AND THE CEQA GUIDELINES UPDATE
Passed in August 2007, SB 97 added Section 21083.05 to the Public Resources Code. The code states "(a) On or before July 1, 2009, the OPR shall prepare, develop, and transmit to the Resources Agency guidelines for the mitigation of GHG emissions or the effects of GHG emissions as required by this division, including, but not limited to, effects associated with transportation or energy consumption. (b) On or before January 1, 2010, the Resources Agency shall certify and adopt guidelines prepared and developed by the OPR pursuant to subdivision (a)." Section 21097 was also added to the Public Resources Code. It provided CEQA protection until January 1, 2010 for transportation projects funded by the Highway Safety, Traffic Reduction, Air Quality, and Port Security Bond Act of 2006 or projects funded by the Disaster Preparedness and Flood Prevention Bond Act of 2006, in stating that the failure to analyze adequately the effects of GHGs would not violate CEQA.
On December 28, 2018, the Natural Resources Agency announced the OAL approved the amendments to the CEQA Guidelines for implementing the CEQA. The CEQA Amendments `1 URBAN
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provide guidance to public agencies regarding the analysis and mitigation of the effects of GHG emissions in CEQA documents. The CEQA Amendments fit within the existing CEQA framework by amending existing CEQA Guidelines to reference climate change.
Section 15064.3 was added the CEQA Guidelines and states that in determining the significance of a project's GHG emissions, the lead agency should focus its analysis on the reasonably foreseeable incremental contribution of the project's emissions to the effects of climate change.
A project's incremental contribution may be cumulatively considerable even if it appears relatively small compared to statewide, national or global emissions. The agency's analysis should consider a timeframe that is appropriate for the project. The agency's analysis also must reasonably reflect evolving scientific knowledge and state regulatory schemes. Additionally, a lead agency may use a model or methodology to estimate GHG emissions resulting from a project. The lead agency has discretion to select the model or methodology it considers most appropriate to enable decision makers to intelligently take into account the project's incremental contribution to climate change. The lead agency must support its selection of a model or methodology with substantial evidence. The lead agency should explain the limitations of the particular model or methodology selected for use (34).
CALIFORNIA RPS PROGRAM
Under the existing RIPS, 25% of retail sales are required to be from renewable sources by December 31, 2016, 33% by December 31, 2020, 40% by December 31, 2024, 45% by December 31, 2027, and 50% by December 31, 2030. SB 100 raises California's RIPS requirement to 50% renewable resources target by December 31, 2026, and to achieve a 60% target by December 31, 2030. SB 100 also requires that retail sellers and local publicly owned electric utilities procure a minimum quantity of electricity products from eligible renewable energy resources so that the total kilowatt hours (kWh) of those products sold to their retail end -use customers achieve 44% of retail sales by December 31, 2024, 52% by December 31, 2027, and 60% by December 31, 2030. In addition to targets under AB 32 and SB 32, Executive Order B-55-18 establishes a carbon neutrality goal for the state of California by 2045; and sets a goal to maintain net negative emissions thereafter. The Executive Order directs the California Natural Resources Agency (CNRA), California Environmental Protection Agency (CalEPA), the Department of Food and Agriculture (CDFA), and CARB to include sequestration targets in the Natural and Working Lands Climate Change Implementation Plan consistent with the carbon neutrality goal.
2.7.3.2 CARB
2017 GARB SCOPING PLAN
In November 2017, CARB released the Fina12017Scoping Plan Update (2017Scoping Plan), which identifies the State's post-2020 reduction strategy. The 2017 Scoping Plan reflects the 2030 target of a 40% reduction below 1990 levels, set by Executive Order B-30-15 and codified by SB
32. Key programs that the proposed Second Update builds upon include the Cap -and -Trade Regulation, the LCFS, and much cleaner cars, trucks, and freight movement, utilizing cleaner, renewable energy, and strategies to reduce CH4 emissions from agricultural and other wastes.
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The 2017 Scoping Plan establishes a new emissions limit of 260 MMTCO2e for the year 2030, which corresponds to a 40% decrease in 1990 levels by 2030 (35).
California's climate strategy would require contributions from all sectors of the economy, including the land base, and would include enhanced focus on zero and near -zero emission (ZE/NZE) vehicle technologies; continued investment in renewables, including solar roofs, wind, and other distributed generation; greater use of low carbon fuels; integrated land conservation and development strategies; coordinated efforts to reduce emissions of short-lived climate pollutants (CH4, black carbon, and fluorinated gases); and an increased focus on integrated land use planning to support livable, transit -connected communities and conservation of agricultural and other lands. Requirements for direct GHG reductions at refineries would further support air quality co -benefits in neighborhoods, including in disadvantaged communities historically located adjacent to these large stationary sources, as well as efforts with California's local air pollution control and air quality management districts (air districts) to tighten emission limits on a broad spectrum of industrial sources. Major elements of the 2017 Scoping Plan framework include:
• Implementing and/or increasing the standards of the Mobile Source Strategy, which include increasing zero -emission vehicles (ZEV) buses and trucks. • LCFS, with an increased stringency (18% by 2030).
• Implementing SB 350, which expands the RPS to 50% RPS and doubles energy efficiency savings by 2030.
• California Sustainable Freight Action Plan, which improves freight system efficiency, utilizes near -zero emissions technology, and deployment of ZEV trucks. • Implementing the proposed Short -Lived Climate Pollutant Strategy (SLPS), which focuses on reducing CH4and HCF emissions by 40% and anthropogenic black carbon emissions by 50% by year 2030.
• Continued implementation of SB 375.
• Post-2020 Cap -and -Trade Program that includes declining caps. • 20% reduction in GHG emissions from refineries by 2030. • Development of a Natural and Working Lands Action Plan to secure California's land base as a net carbon sink.
Note, however, that the 2017 Scoping Plan acknowledges that:
"(ajchieving net zero increases in GHG emissions, resulting in no contribution to GHG impacts, may not be feasible or appropriate for every project, however, and the inability of a project to mitigate its GHG emissions to net zero does not imply the project results in a substantial contribution to the cumulatively significant environmental impact of climate change under CEQA."
In addition to the statewide strategies listed above, the 2017 Scoping Plan also identifies local governments as essential partners in achieving the State's long-term GHG reduction goals and identifies local actions to reduce GHG emissions. As part of the recommended actions, CARB recommends that local governments achieve a community -wide goal to achieve emissions of no ` 1 URBAN
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more than 6 metric tons of COze (MTCOze) or less per capita by 2030 and 2 MTCOze or less per capita by 2050. For CEQA projects, CARB states that lead agencies may develop evidence -based bright -line numeric thresholds —consistent with the 2017Scoping Plan and the State's long-term GHG goals —and projects with emissions over that amount may be required to incorporate on - site design features and MMs that avoid or minimize project emissions to the degree feasible; or a performance -based metric using a CAP or other plan to reduce GHG emissions is appropriate.
According to research conducted by the Lawrence Berkeley National Laboratory (LBNL) and supported by CARB, California, under its existing and proposed GHG reduction policies, could achieve the 2030 goals under SB 32. The research utilized a new, validated model known as the California LBNL GHG Analysis of Policies Spreadsheet (CALGAPS), which simulates GHG and criteria pollutant emissions in California from 2010 to 2050 in accordance to existing and future GHG-reducing policies. The CALGAPS model showed that by 2030, emissions could range from 211 to 428 MTCOze per year (MTCOze/yr), indicating that "even if all modeled policies are not implemented, reductions could be sufficient to reduce emissions 40% below the 1990 level [of SB 32]." CALGAPS analyzed emissions through 2050 even though it did not generally account for policies that might be put in place after 2030. Although the research indicated that the emissions would not meet the State's 80% reduction goal by 2050, various combinations of policies could allow California's cumulative emissions to remain very low through 2050 (36) (37).
CAP -AND -TRADE PROGRAM
The 2017 Scoping Plan identifies a Cap -and -Trade Program as one of the key strategies for California to reduce GHG emissions. According to CARB, a cap -and -trade program would help put California on the path to meet its goal of achieving a 40% reduction in GHG emissions from 1990 levels by 2030. Under cap -and -trade, an overall limit on GHG emissions from capped sectors is established, and facilities subject to the cap would be able to trade permits to emit GHGs within the overall limit.
CARB adopted a California Cap -and -Trade Program pursuant to its authority under AB 32. The Cap -and -Trade Program is designed to reduce GHG emissions from regulated entities by more than 16% between 2013 and 2020, and by an additional 40% by 2030. The statewide cap for GHG emissions from the capped sectors (e.g., electricity generation, petroleum refining, and cement production) commenced in 2013 and would decline over time, achieving GHG emission reductions throughout the program's duration.
Covered entities that emit more than 25,000 MTCOze/yr must comply with the Cap -and -Trade Program. Triggering of the 25,000 MTCOze/yr "inclusion threshold" is measured against a subset of emissions reported and verified under the California Regulation for the Mandatory Reporting of GHG Emissions (Mandatory Reporting Rule or "MRR").
Under the Cap -and -Trade Program, CARB issues allowances equal to the total amount of allowable emissions over a given compliance period and distributes these to regulated entities.
Covered entities are allocated free allowances in whole or part (if eligible), and may buy allowances at auction, purchase allowances from others, or purchase offset credits. Each covered entity with a compliance obligation is required to surrender "compliance instruments" for each L1 URBAN
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MTCO2e of GHG they emit. There also are requirements to surrender compliance instruments covering 30% of the prior year's compliance obligation by November of each year (38).
The Cap -and -Trade Program provides a firm cap, which provides the highest certainty of achieving the 2030 target. An inherent feature of the Cap -and -Trade program is that it does not guarantee GHG emissions reductions in any discrete location or by any particular source. Rather, GHG emissions reductions are only guaranteed on an accumulative basis. As summarized by CARB in the First Update to the Climate Change Scoping Plan:
"The Cap -and -Trade Regulation gives companies the flexibility to trade allowances with others or take steps to cost-effectively reduce emissions at their own facilities.
Companies that emit more have to turn in more allowances or other compliance instruments. Companies that can cut their GHG emissions have to turn in fewer allowances. But as the cap declines, aggregate emissions must be reduced. In other words, a covered entity theoretically could increase its GHG emissions every year and still comply with the Cap -and -Trade Program if there is a reduction in GHG emissions from other covered entities. Such a focus on aggregate GHG emissions is considered appropriate because climate change is a global phenomenon, and the effects of GHG emissions are considered cumulative." (39) The Cap -and -Trade Program covers approximately 80% of California's GHG emissions (35). The Cap -and -Trade Program covers the GHG emissions associated with electricity consumed in California, whether generated in -state or imported. Accordingly, GHG emissions associated with CEQA projects' electricity usage are covered by the Cap -and -Trade Program. The Cap -and -Trade Program also covers fuel suppliers (natural gas and propane fuel providers and transportation fuel providers) to address emissions from such fuels and from combustion of other fossil fuels not directly covered at large sources in the Program's first compliance period. The Cap -and -Trade Program covers the GHG emissions associated with the combustion of transportation fuels in California, whether refined in -state or imported.
2022 CARB ScoPiNG PLAN
On December 15, 2022, CARB adopted the 2022 Scoping Plan for Achieving Carbon Neutrality (2022 Scoping Plan) (40). The 2022 Scoping Plan builds on the 2017 Scoping Plan as well as the requirements set forth by AB 1279, which directs the state to become carbon neutral no later than 2045. To achieve this statutory objective, the 2022 Scoping Plan lays out how California can reduce GHG emissions by 85% below 1990 levels and achieve carbon neutrality by 2045. The Scoping Plan scenario to do this is to "deploy a broad portfolio of existing and emerging fossil fuel alternatives and clean technologies, and align with statutes, Executive Orders, Board direction, and direction from the governor." The 2022 Scoping Plan sets one of the most aggressive approaches to reach carbon neutrality in the world. Unlike the 2017 Scoping Plan, CARB no longer includes a numeric per capita threshold and instead advocates for compliance with a local GHG reduction strategy (CAP) consistent with CEQA Guidelines section 15183.5.
The key elements of the 2022 CARB Scoping Plan focus on transportation - the regulations that will impact this sector are adopted and enforced by CARB on vehicle manufacturers and outside the jurisdiction and control of local governments. As stated in the Plan's executive summary:
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"The major element of this unprecedented transformation is the aggressive reduction of fossil fuels wherever they are currently used in California, building on and accelerating carbon reduction programs that have been in place for a decade and a half. That means rapidly moving to zero - emission transportation; electrifying the cars, buses, trains, and trucks that now constitute California's single largest source of planet -warming pollution." "[A]pproval of this plan catalyzes a number of efforts, including the development of new regulations as well as amendments to strengthen regulations and programs already in place, not just at CARB but across state agencies."
Under the 2022 Scoping Plan, the State will lead efforts to meet the 2045 carbon neutrality goal through implementation of the following objectives:
• Reimagine roadway projects that increase VMT in a way that meets community needs and reduces the need to drive.
• Double local transit capacity and service frequencies by 2030. • Complete the High -Speed Rail (HSR) System and other elements of the intercity rail network by 2040.
• Expand and complete planned networks of high -quality active transportation infrastructure. • Increase availability and affordability of bikes, e-bikes, scooters, and other alternatives to light - duty vehicles, prioritizing needs of underserved communities. • Shift revenue generation for transportation projects away from the gas tax into more durable sources by 2030.
• Authorize and implement roadway pricing strategies and reallocate revenues to equitably improve transit, bicycling, and other sustainable transportation choices. • Prioritize addressing key transit bottlenecks and other infrastructure investments to improve transit operational efficiency over investments that increase VMT. • Develop and implement a statewide transportation demand management (TDM) framework with VMT mitigation requirements for large employers and large developments. • Prevent uncontrolled growth of autonomous vehicle (AV) VMT, particularly zero -passenger miles. • Channel new mobility services towards pooled use models, transit complementarity, and lower VMT outcomes.
• Establish an integrated statewide system for trip planning, booking, payment, and user accounts that enables efficient and equitable multimodal systems. • Provide financial support for low-income and disadvantaged Californians' use of transit and new mobility services.
• Expand universal design features for new mobility services. • Accelerate infill development in existing transportation -efficient places and deploy strategic resources to create more transportation -efficient locations. • Encourage alignment in land use, housing, transportation, and conservation planning in adopted regional plans (RTP/SCS and RHNA) and local plans (e.g., general plans, zoning, and local transportation plans).
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• Accelerate production of affordable housing in forms and locations that reduce VMT and affirmatively further fair housing policy objectives.
• Reduce or eliminate parking requirements (and/or enact parking maximums, as appropriate) and promote redevelopment of excess parking, especially in infill locations. • Preserve and protect existing affordable housing stock and protect existing residents and businesses from displacement and climate risk.
Included in the 2022 Scoping Plan is a set of Local Actions (Appendix D to the 2022 Scoping Plan) aimed at providing local jurisdictions with tools to reduce GHGs and assist the state in meeting the ambitious targets set forth in the 2022 Scoping Plan. Appendix D to the 2022 Scoping Plan includes a section on evaluating plan -level and project -level alignment with the State's Climate Goals in CEQA GHG analyses. In this section, CARB identifies several recommendations and strategies that should be considered for new development in order to determine consistency with the 2022 Scoping Plan. Notably, this section is focused on Residential and Mixed -Use Projects, in fact CARB states in Appendix D (page 4): "...focuses primarily on climate action plans (CAPS) and local authority over new residential development. It does not address other land use types (e.g., industrial) or air permitting." Additionally on Page 21 in Appendix D, CARB states: "The recommendations outlined in this section apply only to residential and mixed -use development project types. California currently faces both a housing crisis and a climate crisis, which necessitates prioritizing recommendations for residential projects to address the housing crisis in a manner that simultaneously supports the State's GHG and regional air quality goals. CARB plans to continue to explore new approaches for other land use types in the future." As such, it would be inappropriate to apply the requirements contained in Appendix D of the 2022 Scoping Plan to any land use types other than residential or mixed -use residential development.
CARB REFRIGERANT MANAGEMENT PROGRAM
CARB adopted a regulation in 2009 to reduce refrigerant GHG emissions from stationary sources through refrigerant leak detection and monitoring, leak repair, system retirement and retrofitting, reporting and recordkeeping, and proper refrigerant cylinder use, sale, and disposal.
The regulation is set forth in sections 95380 to 95398 of Title 17, CCR. The rules implementing the regulation establish a limit on statewide GHG emissions from stationary facilities with refrigeration systems with more than 50 Ibs of a high GWP refrigerant. The refrigerant management program is designed to (1) reduce emissions of high-GWP GHG refrigerants from leaky stationary, non-residential refrigeration equipment; (2) reduce emissions from the installation and servicing of refrigeration and air-conditioning appliances using high-GWP refrigerants; and (3) verify GHG emission reductions.
LCFS
In 2018, the CARB approved amendments to LCFS that included strengthening the carbon intensity benchmarks through 2030 in compliance with GHG emissions reduction target for 2030.
The amendments included crediting opportunities to promote zero emission vehicle adoption, alternative jet fuel, carbon capture and sequestration, and advanced technologies to achieve deep decarbonization in the transportation sector (41).
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PHASE I AND 2 HEAvY-DUTY VEHICLE GHG STANDARDS
CARB has adopted a new regulation for GHG emissions from HDTs and engines sold in California.
It establishes GHG emission limits on truck and engine manufacturers and harmonizes with the EPA rule for new trucks and engines nationally. Existing HD vehicle regulations in California include engine criteria emission standards, tractor -trailer GHG requirements to implement SmartWay strategies (i.e., the Heavy -Duty Tractor -Trailer Greenhouse Gas Regulation), and in - use fleet retrofit requirements such as the Truck and Bus Regulation. In September 2011, the EPA adopted their new rule for HDTs and engines. The EPA rule has compliance requirements for new compression and spark ignition engines, as well as trucks from Class 2b through Class 8.
Compliance requirements begin with model year (MY) 2014 with stringency levels increasing through MY 2018. The rule organizes truck compliance into three groupings, which include a) HD pickups and vans; b) vocational vehicles; and c) combination tractors. The EPA rule does not regulate trailers.
CARB staff has worked jointly with the EPA and the NHTSA on the next phase of federal GHG emission standards for medium -duty trucks (MDT) and HDT vehicles, called federal Phase 2. The federal Phase 2 standards were built on the improvements in engine and vehicle efficiency required by the Phase 1 emission standards and represent a significant opportunity to achieve further GHG reductions for 2018 and later model year HDT vehicles, including trailers. But as discussed above, the EPA and NHTSA have proposed to roll back GHG and fuel economy standards for cars and light -duty trucks, which suggests a similar rollback of Phase 2 standards for MDT and HDT vehicles may be pursued.
In February 2019, the OAL approved the Phase 2 Heavy -Duty Vehicle GHG Standards and became effective April 1, 2019. The Phase 2 GHG standards are needed to offset projected VMT growth and keep heavy-duty truck COz emissions declining. The federal Phase 2 standards establish for the first time, federal emissions requirements for trailers hauled by heavy-duty tractors. The federal Phase 2 standards are more technology -forcing than the federal Phase 1 standards, requiring manufacturers to improve existing technologies or develop new technologies to meet the standards. The federal Phase 2 standards for tractors, vocational vehicles, and heavy-duty pick-up trucks and vans (PUVs) will be phased -in from 2021-2027, additionally for trailers, the standards are phased -in from 2018 (2020 in California) through 2027 (42).
TRACTOR -TRAILER GHG REGULATION
The tractors and trailers subject to this regulation must either use EPA SmartWay certified tractors and trailers or retrofit their existing fleet with SmartWay verified technologies. The regulation applies primarily to owners of 53-foot or longer box -type trailers, including both dry - van and refrigerated -van trailers, and owners of the HD tractors that pull them on California highways. These owners are responsible for replacing or retrofitting their affected vehicles with compliant aerodynamic technologies and low rolling resistance tires. Sleeper cab tractors model year 2011 and later must be SmartWay certified. All other tractors must use SmartWay verified low rolling resistance tires. There are also requirements for trailers to have low rolling resistance tires and aerodynamic devices.
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2.7.3.3 CALIFORNIA REGULATIONS AND BUILDING CODES
Other legislation such as Title 20 and Title 24 energy standards were originally adopted for other purposes such as energy and water conservation, but also provide GHG reductions.
California has a long history of adopting regulations to improve energy efficiency in new and remodeled buildings. These regulations have kept California's energy consumption relatively flat even with rapid population growth.
TITLE 20 CCR
CCR, Title 20: Division 2, Chapter 4, Article 4, Sections 1601-1608: Appliance Efficiency Regulations regulates the sale of appliances in California. The Appliance Efficiency Regulations include standards for both federally regulated appliances and non -federally regulated appliances. 23 categories of appliances are included in the scope of these regulations. The standards within these regulations apply to appliances that are sold or offered for sale in California, except those sold wholesale in California for final retail sale outside the state and those designed and sold exclusively for use in recreational vehicles or other mobile equipment.
TITLE 24 ENERGY EFFICIENCY STANDARDS AND CALIFORNIA GREEN BUILDING STANDARDS California Code of Regulations (CCR) Title 24 Part 6: The California Energy Code was first adopted in 1978 in response to a legislative mandate to reduce California's energy consumption.
The standards are updated periodically to allow consideration and possible incorporation of new energy efficient technologies and methods. CCR, Title 24, Part 11: California Green Building Standards Code (CALGreen) is a comprehensive and uniform regulatory code for all residential, commercial, and school buildings that went in effect on August 1, 2009, and is administered by the California Building Standards Commission.
CALGreen is updated on a regular basis, with the most recent approved update consisting of the 2022 California Green Building Code Standards that vecame effective on January 1, 2023. The Project would be required to comply with the applicable standards in place at the time plan check submittals are made (43). These require, among other items (44):
RESIDENTIAL MANDATORY MEASURES
• Electric vehicle (EV) charging stations. New construction shall comply with Section 4.106.4.1,
4.106.4.2, 4.106.4.3, to facilitate future installation and use of EV chargers. Electric vehicle supply equipment (EVSE) shall be installed in accordance with the California Electrical Code, Article 625. (4.106.4).
o New one- and two-family dwellings and town -houses with attached private garages. For each dwelling unit, install a listed raceway to accommodate a dedicated 208/240-volt branch circuit. The raceway shall not be less than trade size 1 (nominal 1-inch inside diameter). The raceway shall originate at the main service or subpanel and shall terminate into a listed cabinet, box or other enclosure in close proximity to the proposed location of an EV charger. Raceways are required to be continuous at enclosed, inaccessible or concealed areas and spaces. The service panel and/or subpanel shall provide capacity to `1 URBAN
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install a 40-ampere 208/240-volt minimum dedicated branch circuit and space(s) reserved to permit installation of a branch circuit overcurrent protective device. o New hotels and motels. All newly constructed hotels and motels shall provide EV spaces capable of supporting future installation of EVSE. The construction documents shall identify the location of the EV spaces. The number of required EV spaces shall be based on the total number of parking spaces provided for all types of parking facilities in accordance with Table 4.106.4.3.1.
• Water conserving plumbing fixtures and fittings. Plumbing fixtures (water closets and urinals) and fittings (faucets and showerheads) shall comply with Sections 4.303.1.1, 4.303.1.2, 4.303.1.3, and
4.303.1.4.
• Outdoor potable water use in landscape areas. Residential developments shall comply with a local water efficient landscape ordinance or the current California Department of Water Resource Model Water Efficient Landscape Ordinance (MWELO), whichever is more stringent. • Operation and maintenance manual. At the time of final inspection, a manual, compact disc, web - based reference or other media acceptable to the enforcing agency which includes all of the following shall be placed in the building:
o Directions to the owner or occupant that the manual shall remain with the building throughout the life cycle of the structure.
o Operations and maintenance instructions for the following:
1. Equipment and appliances, including water -saving devices and systems, HVAC systems, photovoltaic systems, EV chargers, water -heating systems and other major appliances and equipment.
2. Roof and yard drainage, including gutter and downspouts.
3. Space conditioning systems, including condensers and air filters.
4. Landscape irrigation systems.
5. Water reuse systems.
o Information from local utility, water and waste recovery providers on methods to future reduce resource consumption, including recycle programs and locations. o Public transportation and/or carpool options available in the area. o Educational material on the positive impacts of an interior relative humidity between 30- 60% and what methods an occupants may use to maintain the relative humidity level in that range.
o Information about water -conserving landscape and irrigation design and controllers which conserve water.
o Instructions for maintaining gutters and downspouts and the importance of diverting water at least 5 feet away from the foundation.
o Information about state solar energy and incentive programs available. o A copy of all special inspection verifications required by the enforcing agency of this code. o Information from CALFIRE on maintenance of defensible space around residential structures.
• Any installed gas fireplace shall be direct -vent sealed -combustion type. Any installed woodstove or pellet stove shall comply with U.S. EPA New Source Performance Standards (NSPS) emission L'! URBAN
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limits as applicable and shall have a permanent label indicating they are certified to meet the emission limits. Woodstoves, pellet stoves and fireplaces shall also comply with applicable local ordinances.
• Paints and coatings. Architectural paints and coatings shall comply with VOC limits in Table 1 of the CARB Architectural Suggested Control Measure, as shown in Table 4.504.3, unless more stringent local limits apply. The VOC content limit for coatings that do not meet the definitions for the specialty coatings categories listed in Table 4.504.3 shall be determined by classifying the coating as a Flat, Nonflat, or Nonflat-high Gloss coating, based on its glass, as defined in subsections 4.21, 4.36, and 4.37 of the 2007 CARB, Suggested Control Measure, and the corresponding Flat, Nonflat, Nonflat-high Gloss VOC limit in Table 4.504.3 shall apply.
2.6.3 REGIONAL
The project is within the South Coast Air Basin (SCAB), which is under the jurisdiction of the SCAQMD.
SCAQMD
SCAQMD is the agency responsible for air quality planning and regulation in the SCAB. The SCAQMD addresses the impacts to climate change of projects subject to SCAQMD permit as a lead agency if they are the only agency having discretionary approval for the project and acts as a responsible agency when a land use agency must also approve discretionary permits for the project. The SCAQMD acts as an expert commenting agency for impacts to air quality. This expertise carries over to GHG emissions, so the agency helps local land use agencies through the development of models and emission thresholds that can be used to address GHG emissions.
In 2008, SCAQMD formed a Working Group to identify GHG emissions thresholds for land use projects that could be used by local lead agencies in the SCAB. The Working Group developed several different options that are contained in the SCAQMD Draft Guidance Document — Interim CEQA GHG Significance Threshold, that could be applied by lead agencies. The working group has not provided additional guidance since release of the interim guidance in 2008. The SCAQMD Board has not approved the thresholds; however, the Guidance Document provides substantial evidence supporting the approaches to significance of GHG emissions that can be considered by the lead agency in adopting its own threshold. The current interim thresholds consist of the following tiered approach:
• Tier 1 consists of evaluating whether or not the project qualifies for any applicable exemption under CEQA.
• Tier 2 consists of determining whether the project is consistent with a GHG reduction plan. If a project is consistent with a qualifying local GHG reduction plan, it does not have significant GHG emissions.
• Tier 3 consists of screening values, which the lead agency can choose, but must be consistent with all projects within its jurisdiction. A project's construction emissions are averaged over 30 years and are added to the project's operational emissions. If a project's emissions are below one of the following screening thresholds, then the project is less than significant:
o Residential and Commercial land use: 3,000 MT CO2e per year o Industrial land use: 10,000 MT CO2e per year
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o Based on land use type: residential: 3,500 MT CO2e per year; commercial: 1,400 MT CO2e per year; or mixed use: 3,000 MT CO2e per year
• Tier 4 has the following options:
o Option 1: Reduce BAU emissions by a certain percentage; this percentage is currently undefined.
o Option 2: Early implementation of applicable AB 32 Scoping Plan measures o Option 3: 2020 target for service populations (SP), which includes residents and employees: 4.8 MT COze/SP/year for projects and 6.6 MT CO2e/SP/year for plans; o Option 3, 2035 target: 3.0 MT CO2e/SP/year for projects and 4.1 MT CO2e/SP/year for plans
• Tier 5 involves mitigation offsets to achieve target significance threshold.
The SCAQMD's interim thresholds used the Executive Order S-3-05-year 2050 goal as the basis for the Tier 3 screening level. Achieving the Executive Order's objective would contribute to worldwide efforts to cap CO2 concentrations at 450 ppm, thus stabilizing global climate.
SCAQMD only has authority over GHG emissions from development projects that include air quality permits. At this time, it is unknown if the project would include stationary sources of emissions subject to SCAQMD permits. Notwithstanding, if the Project requires a stationary permit, it would be subject to the applicable SCAQMD regulations.
SCAQMD Regulation XXVII, adopted in 2009 includes the following rules:
• Rule 2700 defines terms and post global warming potentials. • Rule 2701, SoCal Climate Solutions Exchange, establishes a voluntary program to encourage, quantify, and certify voluntary, high quality certified GHG emission reductions in the SCAQMD. • Rule 2702, GHG Reduction Program created a program to produce GHG emission reductions within the SCAQMD. The SCAQMD will fund projects through contracts in response to requests for proposals or purchase reductions from other parties.
CONNECT SOCAL 2020-2045 REGIONAL TRANSPORTATION PLAN/SUSTAINABLE COMMUNITIES STRATEGY On September 3, 2020, SCAG's Regional Council adopted the Connect SoCal 2020-2045 Regional Transportation Plan/Sustainable Communities Strategy (RTP/SCS). The plan charts a path toward a more mobile, sustainable and prosperous region by making key connections: between transportation networks, between planning strategies and between the people whose collaboration can make plans a reality (45).
2.8 CITY OF YUCAIPA CAP
The CAP (September 2015) establishes GHG emission reduction programs and regulations that correlate with and support evolving State GHG emissions reduction goals and strategies. The City of Yucaipa participated and utilized technical information from the San Bernardino County Regional Greenhouse Gas Reduction Plan in development of the CAP. The San Bernardino County Regional Greenhouse Gas Reduction Plan presents the collective results of all local efforts to L1 URBAN
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reduce GHG emissions consistent with the statewide GHG targets expressed in AB 32, "Global Warming Solutions Act of 2006" and SB 375 (46).
The City of Yucaipa CAP utilizes a two-step approach in quantifying GHG emissions. First, a screening threshold of 3,000 MTCOze/yr is used to determine if additional analysis is required.
Projects that exceed the 3,000 MTCOze/yr are required to either achieve a minimum 100 points per the Screening Tables or a 31% reduction over 2007 emissions levels. Consistent with CEQA guidelines, such projects would be determined to have a less than significant individual and cumulative impact for GHG emissions.
To evaluate consistency with the CAP, the City of Yucaipa has implemented CAP Update Screening Tables (Screening Tables) to aid in measuring the reduction of GHG emissions attributable to certain design and construction measures incorporated in development projects. To this end, the Screening Tables establish categories of GHG Implementation Measures. Under each Implementation Measure category, mitigation or project design features (collectively "features") are assigned point values that correspond to the minimum GHG emissions reduction that would result from each feature. Projects that yield at least 100 points are considered to be consistent with the GHG emissions reduction quantities anticipated in the City of Yucaipa's GHG Technical Report and support the GHG emissions reduction targets established under the CAP Update. The potential for such projects to generate direct or indirect GHG emissions that would result in a significant impact on the environment; or conflict with an applicable plan, policy or regulation adopted for the purpose of reducing the emissions of greenhouse gases would be considered less -than -significant.
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3 PROJECT GREENHOUSE GAS IMPACT
3.1 INTRODUCTION
The Project has been evaluated to determine if it will result in a significant GHG impact. The significance of these potential impacts is described in the following section.
3.2 STANDARDS OF SIGNIFICANCE
The criteria used to determine the significance of potential Project -related GHG impacts are taken from the Initial Study Checklist in Appendix G of the State CEQA Guidelines (14 California Code of Regulations §§15000, et seq.). Based on these thresholds, a project would result in a significant impact related to GHG if it would (47):
• Generate GHG emissions, either directly or indirectly, that may have a significant impact on the environment?
• Conflict with an applicable plan, policy or regulation adopted for the purpose of reducing the emissions of GHGs?
4.2.1 THRESHOLDS OF SIGNIFICANCE
The City of Yucaipa CAP utilizes a two-step approach in quantifying GHG emissions. First, a screening threshold of 3,000 MTCO2e/yr is used to determine if additional analysis is required.
Projects that exceed the 3,000 MTCO2e/yr are required to either achieve a minimum 100 points per the Screening Tables or a 31% reduction over 2007 emissions levels. Consistent with CEQA guidelines, such projects would be determined to have a less than significant individual and cumulative impact for GHG emissions.
3.3 CALIFORNIA EMISSIONS ESTIMATOR MODEL TM
In May 2022 California Air Pollution Control Officers Association (CAPCOA) in conjunction with other California air districts, including SCAQMD, released the latest version of the CaIEEMod Version 2022.1.1.12. The purpose of this model is to calculate construction -source and operational -source criteria pollutant (VOCs, NOx, SOx, CO, PM1o, and PM2.5) and GHG emissions from direct and indirect sources; and quantify applicable air quality and GHG reductions achieved from mitigation (48). Accordingly, the latest version of CaIEEMod has been used for this Project to determine construction and operational air quality emissions. CaIEEMod output for both construction and operational scenarios is provided in Appendix 3.1.
3.4 CONSTRUCTION AND OPERATIONAL LIFE -CYCLE ANALYSIS NOT REQUIRED A full life -cycle analysis (LCA) for construction and operational activity is not included in this analysis due to the lack of consensus guidance on LCA methodology at this time (49). Life -cycle analysis (i.e., assessing economy -wide GHG emissions from the processes in manufacturing and transporting all raw materials used in the project development, infrastructure and on -going operations) depends on emission factors or econometric factors that are not well established for L 1 URBAN
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all processes. At this time, an LCA would be extremely speculative and thus has not been prepared.
Additionally, the SCAQMD recommends analyzing direct and indirect project GHG emissions generated within California and not life -cycle emissions because the life -cycle effects from a project could occur outside of California, might not be very well understood or documented, and would be challenging to mitigate (50). Additionally, the science to calculate life cycle emissions is not yet established or well defined; therefore, SCAQMD has not recommended, and is not requiring, life -cycle emissions analysis.
3.5 CONSTRUCTION EMISSIONS
Project construction actvities would generate CO2 and CH4 emissions. The report Rockwell Technical Studies Air Quality Impact Analysis Report (Urban Crossroads, Inc.) contains detailed information regarding Project construction activities (51). As discussed in the Air Quality Impact Analysis, Construction related emissions are expected from the following construction activities:
• Demolition
• Site Preparation
• Grading
• Building Construction
• Paving
• Architectural Coating
3.5.1 CONSTRUCTION DURATION
Construction is expected to commence in January 2024 and will last through December 2025.
The construction schedule utilized in the analysis, shown in Table 3-2, represents a "worst -case" analysis scenario should construction occur any time after the respective dates since emission factors for construction decrease as time passes and the analysis year increases due to emission regulations becoming more stringent.4 It should be noted that the duration of Building Construction was expanded based on the changes made to the number of days which was decreased from the default parameters to reflect the 2025 Opening Year. The Activity and associated equipment represent a reasonable approximation of the expected construction fleet as required per CEQA Guidelines (52).
TABLE 3-1: CONSTRUCTION DURATION
Construction Activity
Start Date
End Date
Days
Demolition
1/1/2024
2/8/2024
29 Site Preparation
2/9/2024
2/29/2024
15 4 As shown in the CalEEMod User's Guide Version 2022.1, Section 4.3 "Offroad Equipment" as the analysis year increases, emission factors for the same equipment pieces decrease due to the natural turnover of older equipment being replaced by newer less polluting equipment and new regulatory requirements.
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Construction Activity
Start Date
End Date
Days
Grading
3/1/2024
4/30/2024
43 Building Construction
5/1/2024
12/31/2025
436
Paving
11/20/2025
12/31/2025
30 Architectural Coating
11/20/2025
12/31/2025
30 Source: Appendix 3.1.
3.5.2 CONSTRUCTION EQUIPMENT
Site specific construction fleet may vary due to specific project needs at the time of construction.
The equipment list is generally based on CalEEMod default parameters and confirmed with the Project Applicant, with the exception of the equipment needed for Building Construction which was increased. A detailed summary of construction equipment assumptions by phase is provided at Table 3-3. Please refer to specific detailed modeling inputs/outputs contained in Appendix 3.1.
TABLE 3-2: CONSTRUCTION EQUIPMENT ASSUMPTIONS
Construction Activity
Equipment'
Amount
Hours Per Day
Demolition
Concrete/Industrial Saws
1 8
Excavators
3 8
Rubber Tired Dozers
2 8
Site Preparation
Rubber Tired Dozers
3 8
Crawler Tractors
4 8
Grading
Excavators
2 8
Graders
1 8
Rubber Tired Dozers
1 8
Scrapers
2 8
Crawler Tractors
2 8
Building Construction
Cranes
1 8
Forklifts
3 8
Generator Sets
1 8
Tractors/Loaders/Backhoes
3 8
Welders
1 8
Paving
Pavers
2 8
Paving Equipment
2 8
Rollers
2 8
Architectural Coating
Air Compressors
1 8
1 In order to account for fugitive dust emissions, Crawler Tractors were used in lieu of Tractors/Loaders/Backhoes during the site preparation and grading phases.
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3.5.3 CONSTRUCTION EMISSIONS SUMMARY
To evaluate Project construction emissions, GHG emissions are quantified and amortized over the life of the Project and added to the operations emissions. To amortize the emissions over the life of the Project, the SCAQMD recommends calculating the total GHG emissions for the construction activities, dividing it by a 30-year project life then adding that number to the annual operational GHG emissions (53). Therefore, Project construction emissions have been amortized over a 30-year period and added to the annual operational GHG emissions. The amortized construction emissions are presented in Table 3-3.
TABLE 3-3: CONSTRUCTION GHG EMISSIONS
Year
Emissions (MT/yr)
COZ
CH4
NZO
R
Total
COW
2024
545.75
0.03 0.02
0.18 551.44
2025
452.35
0.02 0.01
0.18 456.63
Total GHG Emissions
998.10
0.05 0.03
0.36 1008.06
Amortized Construction Emissions
33.27 0.00
0.00 0.01
33.60 Source CalEEMod annual construction -source emissions are presented in Appendix 3.1.
3.6 OPERATIONAL EMISSIONS
Operational activities associated with the proposed Project will result in emissions of CO2, CH4, N20 and R from the following primary sources:
• Area Sources
• Energy Sources
• Mobile Sources
• Water Supply, Treatment, and Distribution
• Solid Waste
• Refrigerants
3.6.1 AREA SOURCE EMISSIONS
Landscape maintenance equipment are typically the only area sources that would generate emissions GHG emissions, which are primarily due to fuel combustion and evaporation of unburned fuel. Equipment in this category would include lawnmowers, shedders/grinders, blowers, trimmers, chain saws, and hedge trimmers used to maintain the landscaping of the Project. The emissions associated with landscape maintenance equipment were calculated based on standard assumptions included in CalEEMod.
5 CalEEMod reports the most common GHGs emitted which include CO2, CH4, N20 and R. These GHGs are then converted into the CO2e by multiplying the individual GHG by the GWP.
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3.6.2 ENERGY SOURCE EMISSIONS
COMBUSTION EMISSIONS ASSOCIATED WITH NATURAL GAS AND ELECTRICITY GHGs are emitted from buildings as a result of activities for which electricity and natural gas are typically used as energy sources. Combustion of any type of fuel emits CO2 and other GHGs directly into the atmosphere; these emissions are considered direct emissions associated with a building; the building energy use emissions do not include street lighting6. GHGs are also emitted during the generation of electricity from fossil fuels; these emissions are considered to be indirect emissions. Unless otherwise noted, CalEEMod default parameters were used.
3.6.3 MOBILE SOURCE EMISSIONS
Project mobile source air quality impacts are dependent on both overall daily vehicle trip generation and the effect of the Project on peak hour traffic volumes and traffic operations in the vicinity of the Project. The Project -related operational air quality impacts are derived primarily from the 1,207 vehicle trips generated by the Project. Trip characteristics available from the Traffic Impact Analysis were utilized in this analysis (54).
3.6.4 WATER SUPPLY, TREATMENT AND DISTRIBUTION
Indirect GHG emissions result from the production of electricity used to convey, treat and distribute water and wastewater. The amount of electricity required to convey, treat and distribute water depends on the volume of water as well as the sources of the water. CalEEMod default parameters were used to estimate GHG emissions associated with water supply, treatment and distribution for the Project scenario.
3.6.5 SOLID WASTE
Residential land uses will result in the generation and disposal of solid waste. A large percentage of this waste will be diverted from landfills by a variety of means, such as reducing the amount of waste generated, recycling, and/or composting. The remainder of the waste not diverted will be disposed of at a landfill. GHG emissions from landfills are associated with the anaerobic breakdown of material. GHG emissions associated with the disposal of solid waste associated with the proposed Project were calculated by CalEEMod using default parameters.
3.6.6 REFRIGERANTS
Air conditioning (A/C) and refrigeration equipment associated with the building are anticipated to generate GHG emissions. CalEEMod automatically generates a default A/C and refrigeration equipment inventory for each project land use subtype based on industry data from the USEPA (2016b). CalEEMod quantifies refrigerant emissions from leaks during regular operation and routine servicing over the equipment lifetime and then derives average annual emissions from the lifetime estimate. Note that CalEEMod does not quantify emissions from the disposal of refrigeration and A/C equipment at the end of its lifetime. Per 17 CCR 95371, new facilities with air conditioning equipment are prohibited from utilizing refrigerants with a GWP of 750 or 6 The CalEEMod emissions inventory model does not include indirect emission related to street lighting. Indirect emissions related to street lighting are expected to be negligible and cannot be accurately quantified at this time as there is insufficient information as to the number and type of street lighting that would occur.
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greater as of January 1, 2025. As such, it was conservatively assumed that air conditioning systems installed at the residential portion of the Project would utilize refrigerants with a GWP of 750. Otherwise, GHG emissions associated with refrigerants were calculated by CalEEMod using default parameters.
3.7 EMISSIONS SUMMARY
The annual GHG emissions associated with the operation of the proposed Project are estimated to be approximately 2,082.78 MT CO2e per year as summarized in Table 3-4. Detailed calculations are provided in Appendix 3.2.
TABLE 3-4: PROJECT GHG EMISSIONS
Emission Source
Emissions (MT/yr)
CO2
CH4
N20
R
Total CO2e
Amortized Construction Emissions
33.27 1.56E-03
9.43E-04
1.21E-02
33.60 Mobile Source
1,542.35
0.08 0.08
2.61 1,570.17
Area Source
29.71 0.00
0.00 0.00
29.74 Energy Source
370.94
0.03 0.00
0.00 372.45
Water Usage
32.13 0.18
0.00 0.00
37.88 Waste
11.05 1.10
0.00 0.00
38.65 Refrigerants
0.00 0.00
0.00 0.30
0.30 Total CO2e (All Sources)
2,082.78
Source: CalEEMod output, See Appendix 3.1 for detailed model outputs.
3.8 GREENHOUSE GAS EMISSIONS FINDINGS AND RECOMMENDATIONS GHG -1: Would the Project generate GHG emissions either directly or indirectly, that may have a significant impact on the environment?
The City of Yucaipa CAP (September 2015) provides guidance on how to analyze GHG emissions and determine significance during the CEQA review of proposed development projects within the City of Yucaipa.
The City of Yucaipa CAP utilizes a two-step approach in quantifying GHG emissions. First, a screening threshold of 3,000 MTCO2e/yr is used to determine if additional analysis is required.
Projects that exceed the 3,000 MTCO2e/yr are required to either achieve a minimum 100 points per the Screening Tables or a 31% reduction over 2007 emissions levels. Consistent with CEQA guidelines, such projects would be determined to have a less than significant individual and cumulative impact for GHG emissions.
As shown on Table 3-4, the Project will result in approximately 2,082.78 MTCO2e/yr; the proposed Project would not exceed the City's screening threshold of 3,000 MTCO2e/yr. Thus, the Project would not have the potential to result in a cumulatively considerable impact with respect L1 URBAN
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to GHG emissions. As previously stated, since the Project does not exceed the 3,000 MTCO2e threshold, the Project is not required to demonstrate compliance with the City's CAP Screening Tables and achieve a minimum 100 points as identified in the CAP.
The Project would not generate GHG emissions either directly or indirectly, that may have a significant impact on the environment.
GHG-2: Would the Project conflict with an applicable plan, policy or regulation adopted for the purpose of reducing the emissions of GHGs?
2022 SCOPING PLAN CONSISTENCY
The Project would not impede the State's progress towards carbon neutrality by 2045 under the 2022 Scoping Plan. The Project would be required to comply with applicable current and future regulatory requirements promulgated through the 2022 Scoping Plan. The Project includes design features related to water and solid conservation that will further reduce Project GHG emissions. As such, the Project would not be inconsistent with the 2022 Scoping Plan. Lastly, the Project would be required to comply with applicable elements outlined in the City's CAP. As such, the Project would be consistent with the 2022 Scoping Plan.
CITY OF YUCAIPA CAP CONSISTENCY
As previously stated, the proposed Project will result in approximately 2,082.78 MTCO2e/yr; the proposed Project would not exceed the City's screening threshold of 3,000 MTCO2e/yr. Thus, project -related emissions would not have a significant direct or indirect impact on GHG and climate change and would not require additional analysis. Overall, the proposed Project would not conflict with the City's CAP and impacts would be less than significant.
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4 REFERENCES
1. State of California. 2019 CEQA California Environmental Quality Act. 2019.
2. California Legislative Information. Senate Bill No. 32. [Online] September 8, 2016. https:Hleginfo.legislature.ca.gov/faces/bilINavClient.xhtml?bill_id=201520160SB32.
3. Air Resources Board. Sustainable Communities. [Online] 2008. http://www.arb.ca.gov/cc/sb375/sb375.htm .
4. -. Clean Car Standards - Pavley, Assembly Bill 1493. [Online] September 24, 2009. http://www.arb.ca.gov/cc/ccros/ccros.htm .
S. Building Standards Commission. California Building Standards Code (Title 24, California Code of Regulations). [Online] http://www.bsc.ca.gov/codes.aspx .
6. California Energy Commission. California Code of Regulations, TITLE 20, Division 2. [Online] 2019. https://www.energy.ca.gov/rules-and-regulations/appliance-efficiency-regulations-title-20 .
7. Air Resources Board. Low Carbon Fuel Standard: The Basics. [Online] 2021. https:Hww2.arb.ca.gov/sites/default/files/2020-09/basics-notes.pdf.
8. Department of Water Resources. Updated Model Water Efficient Landscape Ordinance AB 1881. [Online] 2006. [Cited: November 13, 2013.]
http://www.water.ca.gov/wateruseefficiency/landscapeordinance/updatedOrd_history.cfm .
9. California Energy Commission. SB 1368 Emission Performance Standards. [Online] September 29, 2006. http://www.energy.ca.gov/emission_standards/ .
10. -. Renewables Portfolio Standard (RPS). [Online] 2002. http://www.energy.ca.gov/portfolio/ .
11. National Oceanic and Atmospheric Administration. Greenhouse Gases - Water Vapor. NOAA National Centers For Environmental Information. [Online] https://www.ncdc.noaa.gov/monitoring- references/faq/greenhouse-gases.php?section=watervapor.
12. Climate Change 2007: The Physical Science Basis. Contribution of Working Group 1 to the Fourth Assessment Report. International Panel on Climate Change. 4, 2007.
13. The Carbon Cycle and Climate Change. Bennington, Bret J. 1, s.l.: Brooks/Cole. ISBN 13: 978-0-495- 73855-8.
14. The National Institute for Occupational Safety and Health. Carbon Dioxide. Centers for Disease Control and Prevention. [Online] https://www.cdc.gov/niosh/npg/npgd0103.html .
15. National Oceanic and Atmospheric Administration. Greenhouse Gases - Methane. NOAA National Centers for Environmental Information. [Online] https://www.ncdc.noaa.gov/monitoring- references/faq/greenhouse-gases.php?section=methane.
16. World Resources Institute. Climate Analysis Indicator Tool (CAIT). [Online] http://cait.wri.org .
17. National Oceanic and Atmospheric Administration. Greenhouse Gases - Chlorofluorocarbons. NOAA National Centers For Environmental Information. [Online] https://www.ncdc.noaa.gov/monitoring- references/faq/greenhouse-gases.php?section=chlorofluorocarbons.
18. United States Environmental Protection Agency. Regulation for Reducting Sulfur Hexafluoride Emissions from Gas Insulated Switchgear. Environmental Protection Agency. [Online] May 7, 2014. https://www.epa.gov/sites/production/files/2016-02/documents/mehl-arb-presentation-2014- wkshp.pdf.
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19. World Resources Institute. Nitrogen Trifluoride Now Required in GHG Protocol Greenhouse Gas Emissions Inventory. [Online] May 22, 2013. https://www.wri.org/blog/2013/05/nitrogen-trifluoride- now-required-ghg-protocol-greenhouse-gas-emissions-inventories.
20. National Center for Biotechnology Information. Nitrogen Trifluoride. PubChem Compound Database. [Online] httPs:HPubchem.ncbi.nlm.nih.gov/compound/24553.
21. American Lung Association. Climate Change. [Online] http://www.lung.org/our-initiatives/healthy- air/outdoor/climate-change/.
22. Barbara H. Allen -Diaz. Climate change affects us all. University of California Agriculture and Natural Resources. [Online] April 1, 2009. http://calag.ucanr.edu/Archive/?article=ca.v063nO2p5l .
23. Intergovernmental Panel on Climate Change. Climate Change 2021 The Physical Science Basis.
Climate Change 2021 The Physical Science Basis. [Online] https://www.ipcc.ch/report/sixth- assessment-report-working-group-i/.
24. United Nations. GHG Profiles - Annex I. [Online] http://di.unfccc.int/ghg_profile_annexl .
25. —. GHG Profiles - Non -Annex I. [Online] http://di.unfccc.int/ghg_profile_non_annexl .
26. World Resources Institute. Climate Analysis Indicator Tool (CAIT). [Online] http://cait.wri.org .
27. Air Resources Board. 2022 GHG Inventory. California Greenhouse Gas Emission Inventory 2000-2020 Edition. [Online] [Cited: February 1, 2022.] http://www.arb.ca.gov/cc/inventory/data/data.htm .
28. Agency, United States Environmental Protection. Endangerment and Cause or Contribute Findings for Greenhouse Gases under the Section 202(a) of the Clean Air Act. United States Environmental Protection Agency. [Online] https://www.epa.gov/ghgemissions/endangerment-and-cause-or- contribute-findings-greenhouse-gases-under-section-202a-clean.
29. Federal Register. Mid -Term Evaluation of Greenhouse Gas Emissions Standards for Model Year 2022- 2025 Light -Duty Vehicles. [Online] 2018.
https://www.federalregister.gov/documents/2018/04/13/2018-07364/mid-term-evaluation-of- greenhouse-gas-emissions-standards-for-model-year-2022-2025-light-duty.
30. Administration, National Highway Traffic Safety. SAFE: The Safer Affordable Fuel -Efficient 'SAFE' Vehicle Rule. National Highway Traffic Safety Administration. [Online] 2020. https://www.nhtsa.gov/corporate-average-fuel-economy/safe .
31. U.S. Environmental Protection Agency. EPA Reconsiders Previous Administration's Withdrawal of California's Waiver to Enforce Greenhouse Gas Standards for Cars and Light Trucks. Washinbgton D.C.: s.n., April 26, 2021.
32. United States Environmental Protection Agency. SmartWay. [Online] https://www.epa.gov/smartway/learn-about-smartway .
33. California Legislative Information. Senate Bill No. 32. [Online] 2016. https://Ieginfo.legislature.ca.gov/faces/bilINavClient.xhtml?bill_id=201520160SB32 .
34. Association of Environmental Professionals. 2018 CEQA California Environmental Quality Act. 2018.
35. California Air Resources Board. California's 2017 Climate Change Scoping Plan . [Online] 2017. https://ww3.arb.ca.gov/cc/scopingplan/scoping_plan_2017_es.pdf .
36. Lawrence Berkeley National Laboratory. California's Policies Can Significantly Cut Greenhouse Gas Emissions through 2030. Lawrence Berkeley National Laboratory. [Online] January 22, 2015. http://newscenter.lbl.gov/2015/01/22/californias-policies-can-significantly-cut-greenhouse-gas- emissions-2030/.
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37. Ernest Orlando Lawrence Berkeley National Laboratory. Modeling California policy impacts on greenhouse gas emissions. [Online] 2015. https://eaei.lbl.gov/sites/all/files/Ibnl-7008e.pdf .
38. California Air Resources Board. Legal Disclaimer & User's Notice. [Online] April 2019. https://ww3.arb.ca.gov/cc/capandtrade/capandtrade/ct_reg_unofficial.pdf .
39. Climate Change Scoping Plan. [Online] 2014.
https://ww3.arb.ca.gov/cc/scopingplan/2013_update/first_update_climate_change_scoping_plan.p df.
40. -. 2022 Scoping Plan for Achieving Carbon Neutrality.
41. -. Low Carbon Fuel Standard. [Online] 2019. https://ww3.arb.ca.gov/fuels/lcfs/lcfs.htm .
42. -. Greenhouse Gas Standards for Medium- and Heavy -Duty Engines and Vehicles. [Online] 2020. https:Hww2.arb.ca.gov/node/1594/about.
43. The California Energy Commission. 2022 Building Energy Efficiency Standards. California Energy Commission. [Online] 2022. https://www.energy.ca.gov/programs-and-topics/programs/building- energy-efficiency-standards/2022-building-energy-efficiency.
44. California Department of General Services. 2022 CALGreen Code. CALGreen. [Online] https://codes.iccsafe.org/content/CAGBC2022P1 .
45. Southern California Association Governments. Connect SoCal 2020-2045 Regional Transportation Plan/Sustainable Communities Strategy. [Online] 2020.
https://www.connectsocal.org/Documents/Adopted/0903fConnectSoCal-Plan.pdf .
46. City of Yucaipa. City of Yucaipa Climate Action Plan. [Online] September 2015. http://www.yucaipa.org/wp-
content/uploads/disaster_prep/Yucaipa_Climate_Action_Plan_Annex.pdf.
47. State of California. 2019 CEQA California Environmental Quality Act. 2019.
48. California Air Pollution Control Officers Association (CAPCOA). California Emissions Estimator Model (CalEEMod). [Online] September 2016. www.caleemod.com .
49. California Natural Resources Agency. Final Statement of Reasons for Regulatory Action, Amendments to the State CEQA Guidelines Addressing Analysis and Mitigation of Greenhouse Gas Emissions Pursuant to SB97. [Online] December 2009.
50. Minutes for the GHG CEQA Significance. South Coast Air Quality Managment District. 2008.
51. Urban Crossroads, Inc. Rockwell Technical Studies Air Quality Impact Analysis Report. 2023.
52. State of California. 2019 CEQA California Environmental Quality Act. 2019.
53. South Coast Air Quality Management District. Greenhouse Gas CEQA Significance Threshold Stakeholder Working Group #13. [Powerpoint] Diamond Bar: s.n., 2009.
54. TJW Engineering, Inc. 12th Street and Avenue E Residential Traffic Impact Analysis, 2023. ` 1 URBAN
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31 Rockwell Technical studies Greenhouse Gas Analysis
Less than significant impact.
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5 CERTIFICATIONS
The contents of this energy analysis report represent an accurate depiction of the environmental impacts associated with the proposed Rockwell Technical Studies. The information contained in this energy analysis report is based on the best available data at the time of preparation. If you have any questions, please contact me directly at [email protected].
Haseeb Qureshi
Principal
Urban Crossroads, Inc.
[email protected]
EDUCATION
Master of Science in Environmental Studies
California State University, Fullerton • May 2010
Bachelor of Arts in Environmental Analysis and Design
University of California, Irvine • June 2006
PROFESSIONAL AFFILIATIONS
AEP —Association of Environmental Planners
AWMA — Air and Waste Management Association
ASTM — American Society for Testing and Materials
PROFESSIONAL CERTIFICATIONS
Planned Communities and Urban Infill — Urban Land Institute • June 2011 Indoor Air Quality and Industrial Hygiene — EMSL Analytical • April 2008 Principles of Ambient Air Monitoring — California Air Resources Board • August 2007 AB2588 Regulatory Standards —Trinity Consultants • November 2006 Air Dispersion Modeling— Lakes Environmental • June 2006 `�'► URBAN
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APPENDIX 3.1:
PROJECT CALEEMOD CONSTRUCTION EMISSIONS MODEL OUTPUTS
15223-03 GHG Report
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Table of Contents
1. Basic Project Information
1.1. Basic Project Information
1.2. Land Use Types
1.3. User -Selected Emission Reduction Measures by Emissions Sector
2. Emissions Summary
2.1. Construction Emissions Compared Against Thresholds
2.2. Construction Emissions by Year, Unmitigated
3. Construction Emissions Details
3.1. Demolition (2024) - Unmitigated
3.3. Site Preparation (2024) - Unmitigated
3.5. Grading (2024) - Unmitigated
3.7. Building Construction (2024) - Unmitigated
3.9. Building Construction (2025) - Unmitigated
3.11. Paving (2025) - Unmitigated
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15223 - Rockwell Yucaipa (Construction) Detailed Report, 6/15/2023
3.13. Architectural Coating (2025) - Unmitigated
4. Operations Emissions Details
4.10. Soil Carbon Accumulation By Vegetation Type
4.10.1. Soil Carbon Accumulation By Vegetation Type - Unmitigated
4.10.2. Above and Belowground Carbon Accumulation by Land Use Type - Unmitigated
4.10.3. Avoided and Sequestered Emissions by Species - Unmitigated
5. Activity Data
5.1. Construction Schedule
5.2. Off -Road Equipment
5.2.1. Unmitigated
5.3. Construction Vehicles
5.3.1. Unmitigated
5.4. Vehicles
5.4.1. Construction Vehicle Control Strategies
5.5. Architectural Coatings
5.6. Dust Mitigation
5.6.1. Construction Earthmoving Activities
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5.6.2. Construction Earthmoving Control Strategies
5.7. Construction Paving
5.8. Construction Electricity Consumption and Emissions Factors
5.18. Vegetation
5.18.1. Land Use Change
5.18.1.1. Unmitigated
5.18.1. Biomass Cover Type
5.18.1.1. Unmitigated
5.18.2. Sequestration
5.18.2.1. Unmitigated
6. Climate Risk Detailed Report
6.1. Climate Risk Summary
6.2. Initial Climate Risk Scores
6.3. Adjusted Climate Risk Scores
6.4. Climate Risk Reduction Measures
7. Health and Equity Details
7.1. CalEnviroScreen 4.0 Scores
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7.2. Healthy Places Index Scores
7.3. Overall Health & Equity Scores
7.4. Health & Equity Measures
7.5. Evaluation Scorecard
7.6. Health & Equity Custom Measures
8. User Changes to Default Data
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1. Basic Project Information
1.1. Basic Project Information
Project Name
Construction Start Date
Lead Agency
Land Use Scale
Analysis Level for Defaults
Windspeed (m/s)
Precipitation (days)
Location
County
City
Air District
Air Basin
TAZ
EDFZ
Electric Utility
Gas Utility
App Version
1.2. Land Use Types
Single Family 128
Housing
Dwelling Unit 6.39
15223 - Rockwell Yucaipa (Construction)
1 /1 /2024
Project/site
County
2.50 1.80
32994 Avenue E, Yucaipa, CA 92399, USA
San Bernardino -South Coast
Yucaipa
South Coast AQMD
South Coast
5166
10 Southern California Edison
Southern California Gas
2022.1.1.13
278,548
1,499,246 —
424
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15223 - Rockwell Yucaipa (Construction) Detailed Report, 6/15/2023 Parking Lot 81.0 Space 0.73 0.00 0.00
Other Asphalt 7.66 Acre 7.66 0.00 0.00
Surfaces
1.3. User -Selected Emission Reduction Measures by Emissions Sector No measures selected
2. Emissions Summary
2.1. Construction Emissions Compared Against Thresholds Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual Daily, - - - - - - - - - - -
Summer
(Max)
Unmit. 4.56 3.66 36.8 33.2 0.07 1.48 3.45 4.94 1.36 1.18 2.54 Daily, - - - - - - - - - - -
Winter
(Max)
Unmit. 4.55 64.7 36.9 34.1 0.07 1.60 5.89 7.49 1.47 2.74 4.21 Average - - - - - - - - - - -
Daily
(Max)
Unmit. 1.85 6.22 14.0 15.5 0.03 0.59 1.01 1.59 0.54 0.34 0.88 - Annual - - - - - - - - - - - -
(Max)
Unmit. 0.34 1.13 2.56 2.83 < 0.005 0.11 0.18 0.29 0.10 0.06 0.16 -
2.2. Construction Emissions by Year, Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) 6/33
Guest parking
8,857 8,857 0.50 0.38 5.32 8,988
8,834 8,834 0.50 0.38 0.14 8,960
3,296
3,296
0.16 0.10
1.10 3,331
546
546
0.03 0.02
0.18 551
15223 - Rockwell Yucaipa (Construction) Detailed Report, 6/15/2023 Daily -
Summer
(Max)
2024
4.56 3.66
36.8 33.2
0.07 1.48
3.45 4.94
1.36 1.18
2.54 -
2025
1.72 1.44
11.9 18.0
0.03 0.47
0.70 1.17
0.43 0.17
0.60 -
Daily -
-
-
-
-
-
-
-
-
-
-
- -
Winter
(Max)
2024
4.55 3.73
36.9 34.1
0.07 1.60
5.89 7.49
1.47 2.74
4.21 -
2025
2.98 64.7
20.7 30.0
0.04 0.86
1.02 1.88
0.79 0.24
1.03 -
Average
-
-
-
-
-
-
-
-
-
-
- -
Daily
2024
1.85 1.53
14.0 15.5
0.03 0.59
1.01 1.59
0.54 0.34
0.88 -
2025
1.32 6.22
9.27 13.4
0.02 0.37
0.53 0.90
0.34 0.13
0.47 -
Annual
-
-
-
-
-
-
-
-
-
2024
0.34 0.28
2.56 2.83
< 0.005
0.11 0.18
0.29 0.10
0.06 0.16 -
2025
0.24 1.13
1.69 2.44
< 0.005
0.07 0.10
0.16 0.06
0.02 0.09 -
3. Construction Emissions Details
3.1. Demolition (2024) - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) 8,857
8,857
0.50 0.38
5.32 8,988
3,640
3,640
0.16 0.10
3.42 3,677
8,834
8,834
0.50 0.38
0.14 8,960
5,588
5,588
0.25 0.12
0.12 5,632
3,296
3,296
0.16 0.10
1.08 3,331
2,732
2,732
0.12 0.07
1.10 2,758
546
546
0.03 0.02
0.18 551
452
452
0.02 0.01
0.18 457
Onsite - - - - - - - - - - - - - - - -
Daily, - - - - - - - - - - - - - - - -
Summer
(Max)
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15223 - Rockwell Yucaipa (Construction) Detailed Report, 6/15/2023 Daily, -
-
-
-
-
- -
Winter
(Max)
Off -Road 3.12
2.62 24.9
21.7 0.03
1.06 -
1.06 0.98
-
0.98 -
Equipment
Demolitio -
-
-
-
-
-
0.08 0.08
-
0.01 0.01 -
n
Onsite 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00 -
truck
Average -
-
-
Daily
Off -Road 0.25
0.21 1.98
1.73 < 0.005
0.08 -
0.08 0.08
-
0.08 -
Equipment
Demolitio -
-
-
-
-
-
0.01 0.01
-
< 0.005
< 0.005 -
n
Onsite 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00 -
truck
Annual -
-
-
-
-
-
-
-
-
-
- -
Off -Road 0.05
0.04 0.36
0.32 < 0.005
0.02 -
0.02 0.01
-
0.01 -
Equipment
Demolitio -
-
-
-
< 0.005
< 0.005
-
< 0.005
< 0.005 -
n
Onsite 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00 -
truck
Offsite -
-
-
-
-
-
-
-
-
-
- -
Daily, -
-
-
-
-
-
-
-
-
-
- -
Summer
(Max)
Daily, -
-
-
-
-
-
-
-
-
-
- -
Winter
(Max)
Worker 0.08
0.07 0.09
0.96 0.00
0.00 0.20
0.20 0.00
0.05 0.05 -
Vendor < 0.005
< 0.005
0.03 0.02
< 0.005
< 0.005
0.01 0.01
< 0.005
< 0.005
< 0.005 -
8/33
3,425
3,425
0.14 0.03 -
3,437
0.00 0.00
0.00 0.00 0.00
0.00 272
272
0.01 < 0.005 -
273
0.00 0.00
0.00 0.00 0.00
0.00 45.1
45.1 < 0.005
< 0.005 -
45.2 0.00
0.00 0.00
0.00 0.00
0.00 198 198 0.01 0.01 0.02 200
24.5 24.5 < 0.005 < 0.005 < 0.005 25.6
15223 - Rockwell Yucaipa (Construction) Detailed Report, 6/15/2023 Hauling 0.01 < 0.005 0.08
0.05 < 0.005
< 0.005
0.02 0.02
< 0.005
< 0.005
0.01 -
Average - - -
- -
-
-
-
-
-
-
Daily
Worker 0.01 0.01 0.01
0.08 0.00
0.00 0.02
0.02 0.00
< 0.005
< 0.005 -
Vendor < 0.005 < 0.005 < 0.005
< 0.005 < 0.005
< 0.005
< 0.005
< 0.005
< 0.005
< 0.005
< 0.005 -
Hauling < 0.005 < 0.005 0.01
< 0.005 < 0.005
< 0.005
< 0.005
< 0.005
< 0.005
< 0.005
< 0.005 -
Annual - - -
- -
-
-
-
-
-
- -
Worker < 0.005 < 0.005 < 0.005
0.01 0.00
0.00 < 0.005
< 0.005
0.00 < 0.005
< 0.005 -
Vendor < 0.005 < 0.005 < 0.005
< 0.005 < 0.005
< 0.005
< 0.005
< 0.005
< 0.005
< 0.005
< 0.005 -
Hauling < 0.005 < 0.005 < 0.005
< 0.005 < 0.005
< 0.005
< 0.005
< 0.005
< 0.005
< 0.005
< 0.005 -
3.3. Site Preparation (2024)
- Unmitigated
Criteria Pollutants (lb/day for daily,
ton/yr for annual)
and
GHGs (lb/day
for
daily, MT/yr for
annual)
Onsite
Daily, - - - - - - - - - - -
Summer
(Max)
Daily, - - - - - - - - - - -
Winter
(Max)
Off -Road 4.34 3.65 36.0 32.9 0.05 1.60 - 1.60 1.47 - 1.47 Equipment
Dust - - - - - - 5.66 5.66 - 2.69 2.69
From
Material
Movemen
Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - truck
Average - - - - - - - - - - - -
Daily
65.6 65.6
0.01 0.01
< 0.005
68.9 15.9
15.9 < 0.005
< 0.005
0.03 16.2
1.94 1.94
< 0.005
< 0.005
< 0.005
2.04 5.21
5.21 < 0.005
< 0.005
< 0.005
5.48 2.64
2.64 < 0.005
< 0.005
< 0.005
2.68 0.32
0.32 < 0.005
< 0.005
< 0.005
0.34 0.86
0.86 < 0.005
< 0.005
< 0.005
0.91 5,296 5,296 0.21 0.04 - 5,314
0.00 0.00 0.00 0.00 0.00 0.00
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0.18 0.15
1.48 1.35
< 0.005
0.07 -
0.07 0.06
-
0.06 -
Equipment
Dust
-
-
-
-
-
-
0.23 0.23
-
0.11 0.11 -
From
Material
Movemen
:
Onsite
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
truck
Annual
-
-
-
-
-
-
-
-
-
Off -Road
0.03 0.03
0.27 0.25
< 0.005
0.01 -
0.01 0.01
-
0.01 -
Equipment
Dust
-
-
-
-
-
-
0.04 0.04
-
0.02 0.02 -
From
Material
Movemen
:
Onsite
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
truck
Offsite
-
-
-
-
-
-
Daily,
-
-
-
-
-
-
-
Summer
(Max)
Daily,
-
-
-
-
-
-
-
-
-
-
- -
Winter
(Max)
Worker
0.10 0.09
0.10 1.12
0.00 0.00
0.23 0.23
0.00 0.05
0.05 -
Vendor
< 0.005
< 0.005
0.01 0.01
< 0.005
< 0.005
< 0.005
< 0.005
< 0.005
< 0.005
< 0.005 -
Hauling
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
Average
-
-
-
-
-
-
-
-
-
-
- -
Daily
Worker
< 0.005
< 0.005
< 0.005
0.05 0.00
0.00 0.01
0.01 0.00
< 0.005
< 0.005 -
Vendor
< 0.005
< 0.005
< 0.005
< 0.005
< 0.005
< 0.005
< 0.005
< 0.005
< 0.005
< 0.005
< 0.005 -
Hauling
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
Annual
-
-
-
- -
10/33
218 218 0.01 < 0.005 - 218
0.00 0.00
0.00 0.00 0.00
0.00 36.0
36.0 < 0.005
< 0.005 -
36.2 0.00 0.00 0.00 0.00 0.00 0.00
231
231
0.01 0.01
0.03 234
12.5 12.5
< 0.005
< 0.005
< 0.005
13.1 0.00
0.00 0.00
0.00 0.00
0.00 9.62
9.62 < 0.005
< 0.005
0.02 9.76
0.52 0.52
< 0.005
< 0.005
< 0.005
0.54 0.00
0.00 0.00
0.00 0.00
0.00 15223 - Rockwell Yucaipa (Construction) Detailed Report, 6/15/2023 Worker < 0.005 < 0.005
< 0.005 0.01 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 - Vendor < 0.005 < 0.005
< 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 - Hauling 0.00 0.00
0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 -
3.5. Grading (2024)
- Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Onsite
Daily,
Summer
(Max)
Off -Road 4.19
3.52 34.3
30.2 0.06
1.45 -
1.45 1.33
-
1.33 -
Equipment
Dust -
-
-
-
-
-
2.67 2.67
-
0.98 0.98 -
From
Material
Movemen
Onsite 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00 -
truck
Daily, -
-
-
Winter
(Max)
Off -Road 4.19
3.52 34.3
30.2 0.06
1.45 -
1.45 1.33
-
1.33 -
Equipment
Dust -
-
-
-
-
-
2.67 2.67
-
0.98 0.98 -
From
Material
Movemen
Onsite 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00 -
truck
Average -
-
-
-
-
-
-
-
-
-
- -
Daily
1.59 1.59
< 0.005
< 0.005
< 0.005
1.62 0.09
0.09 < 0.005
< 0.005
< 0.005
0.09 0.00
0.00 0.00
0.00 0.00
0.00 6,598 6,598 0.27 0.05 - 6,621
0.00 0.00 0.00 0.00 0.00 0.00
6,598 6,598 0.27 0.05 - 6,621
0.00 0.00 0.00 0.00 0.00 0.00
11 / 33
15223 - Rockwell Yucaipa (Construction) Detailed Report, 6/15/2023 Off -Road
0.49 0.41
4.04 3.55
0.01 0.17
-
0.17 0.16
-
0.16 -
Equipment
Dust
-
-
-
-
-
-
0.31 0.31
-
0.12 0.12 -
From
Material
Movemen
:
Onsite
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
truck
Annual
-
-
-
-
-
-
Off -Road
0.09 0.08
0.74 0.65
< 0.005
0.03 -
0.03 0.03
-
0.03 -
Equipment
Dust
-
-
-
-
-
-
0.06 0.06
-
0.02 0.02 -
From
Material
Movemen
:
Onsite
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
truck
Offsite
-
-
-
-
Daily,
-
-
-
-
-
- -
Summer
(Max)
Worker
0.11 0.10
0.10 1.69
0.00 0.00
0.26 0.26
0.00 0.06
0.06 -
Vendor
< 0.005
< 0.005
0.04 0.02
< 0.005
< 0.005
0.01 0.01
< 0.005
< 0.005
< 0.005 -
Hauling
0.26 0.04
2.38 1.33
0.01 0.04
0.51 0.55
0.02 0.14
0.16 -
Daily,
-
-
-
-
-
-
-
-
-
-
- -
Winter
(Max)
Worker
0.11 0.10
0.11 1.28
0.00 0.00
0.26 0.26
0.00 0.06
0.06 -
Vendor
< 0.005
< 0.005
0.04 0.02
< 0.005
< 0.005
0.01 0.01
< 0.005
< 0.005
< 0.005 -
Hauling
0.25 0.04
2.48 1.34
0.01 0.04
0.51 0.55
0.02 0.14
0.16 -
Average
-
-
-
-
-
-
-
-
-
-
- -
Daily
Worker
0.01 0.01
0.01 0.16
0.00 0.00
0.03 0.03
0.00 0.01
0.01 -
12/33
777 777 0.03 0.01 - 780
0.00 0.00
0.00 0.00 0.00
0.00 129
129
0.01 < 0.005 -
129
0.00 0.00 0.00 0.00 0.00 0.00
288
288
0.01 0.01
1.15 292
36.1 36.1
< 0.005
0.01 0.10
37.8 1,935
1,935
0.21 0.31
4.07 2,037
264
264
0.01 0.01
0.03 267
36.1 36.1
< 0.005
0.01 < 0.005
37.7 1,936
1,936
0.21 0.31
0.11 2,034
31.5 31.5
< 0.005
< 0.005
0.06 32.0
15223 - Rockwell Yucaipa (Construction) Detailed Report, 6/15/2023 Vendor < 0.005 < 0.005 0.01 < 0.005
< 0.005 < 0.005
< 0.005
< 0.005
< 0.005
< 0.005
< 0.005 -
Hauling 0.03 < 0.005 0.30 0.16
< 0.005 < 0.005
0.06 0.06
< 0.005
0.02 0.02 -
Annual - - - -
- -
-
-
-
-
- -
Worker < 0.005 < 0.005 < 0.005 0.03
0.00 0.00
0.01 0.01
0.00 < 0.005
< 0.005 -
Vendor < 0.005 < 0.005 < 0.005 < 0.005
< 0.005 < 0.005
< 0.005
< 0.005
< 0.005
< 0.005
< 0.005 -
Hauling 0.01 < 0.005 0.05 0.03
< 0.005 < 0.005
0.01 0.01
< 0.005
< 0.005
< 0.005 -
3.7. Building Construction (2024) -
Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day
for
daily, MT/yr for
annual)
Onsite
Daily,
Summer
(Max)
Off -Road 1.55
1.30 12.2
14.2 0.03
0.54 - 0.54
0.49 - 0.49 -
Equipment
Onsite 0.00
0.00 0.00
0.00 0.00
0.00 0.00 0.00
0.00 0.00 0.00 -
truck
Daily, -
-
-
-
-
-
- -
-
- - -
Winter
(Max)
Off -Road 1.55
1.30 12.2
14.2 0.03
0.54 - 0.54
0.49 - 0.49 -
Equipment
Onsite 0.00
0.00 0.00
0.00 0.00
0.00 0.00 0.00
0.00 0.00 0.00 -
truck
Average -
-
-
-
-
-
- -
-
- - -
Daily
Off -Road 0.74
0.62 5.84
6.82 0.01
0.26 - 0.26
0.24 - 0.24 -
Equipment
Onsite 0.00
0.00 0.00
0.00 0.00
0.00 0.00 0.00
0.00 0.00 0.00 -
truck
4.25 4.25
< 0.005
< 0.005
0.01 4.45
228
228
0.03 0.04
0.21 240
5.22 5.22
< 0.005
< 0.005
0.01 5.29
0.70 0.70
< 0.005
< 0.005
< 0.005
0.74 37.8
37.8 < 0.005
0.01 0.03
39.7 2,630
2,630
0.11 0.02
- 2,639
0.00 0.00
0.00 0.00
0.00 0.00
2,630
2,630
0.11 0.02
- 2,639
0.00 0.00
0.00 0.00
0.00 0.00
1,261
1,261
0.05 0.01
- 1,265
0.00 0.00
0.00 0.00
0.00 0.00
13/33
15223 - Rockwell Yucaipa (Construction) Detailed Report, 6/15/2023 Annual
Off -Road
0.14 0.11
1.06 1.24
< 0.005
0.05 -
0.05 0.04
-
0.04 -
Equipment
Onsite
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
truck
Offsite
-
-
-
-
-
-
-
-
-
-
- -
Daily,
-
-
-
-
-
-
-
-
-
-
- -
Summer
(Max)
Worker
0.26 0.24
0.22 3.90
0.00 0.00
0.60 0.60
0.00 0.14
0.14 -
Vendor
0.04 0.01
0.42 0.23
< 0.005
0.01 0.10
0.11 0.01
0.03 0.03 -
Hauling
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
Daily,
-
-
-
-
-
-
-
-
-
-
- -
Winter
(Max)
Worker
0.25 0.23
0.26 2.95
0.00 0.00
0.60 0.60
0.00 0.14
0.14 -
Vendor
0.04 0.01
0.44 0.23
< 0.005
0.01 0.10
0.11 0.01
0.03 0.03 -
Hauling
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
Average
-
-
-
-
-
-
-
-
-
-
- -
Daily
Worker
0.12 0.11
0.13 1.48
0.00 0.00
0.29 0.29
0.00 0.07
0.07 -
Vendor
0.02 < 0.005
0.21 0.11
< 0.005
< 0.005
0.05 0.05
< 0.005
0.01 0.02 -
Hauling
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
Annual
-
-
-
-
-
-
-
-
-
-
- -
Worker
0.02 0.02
0.02 0.27
0.00 0.00
0.05 0.05
0.00 0.01
0.01 -
Vendor
< 0.005
< 0.005
0.04 0.02
< 0.005
< 0.005
0.01 0.01
< 0.005
< 0.005
< 0.005 -
Hauling
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
3.9. Building Construction
(2025)
- Unmitigated
Criteria
Pollutants (lb/day for daily, ton/yr for annual) and
GHGs
(lb/day for daily, MT/yr for
annual)
14/33
209
209
0.01 < 0.005 -
210
0.00 0.00
0.00 0.00 0.00
0.00 663
663
0.03 0.02
2.65 674
366
366
0.03 0.05
1.02 384
0.00 0.00
0.00 0.00
0.00 0.00
608
608
0.03 0.02
0.07 616
366
366
0.03 0.05
0.03 383
0.00 0.00
0.00 0.00
0.00 0.00
296
296
0.01 0.01
0.55 300
175
175
0.01 0.03
0.21 184
0.00 0.00
0.00 0.00
0.00 0.00
48.9 48.9
< 0.005
< 0.005
0.09 49.6
29.0 29.0
< 0.005
< 0.005
0.03 30.4
0.00 0.00
0.00 0.00
0.00 0.00
15223 - Rockwell Yucaipa (Construction) Detailed Report, 6/15/2023 Onsite -
-
-
-
-
-
-
-
-
-
- -
Daily, -
-
-
-
-
-
-
-
-
-
- -
Summer
(Max)
Off -Road 1.45
1.21 11.3
14.1 0.03
0.47 -
0.47 0.43
-
0.43 -
Equipment
Onsite 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00 -
truck
Daily, -
-
-
-
-
-
-
-
-
-
- -
Winter
(Max)
Off -Road 1.45
1.21 11.3
14.1 0.03
0.47 -
0.47 0.43
-
0.43 -
Equipment
Onsite 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00 -
truck
Average -
-
-
-
-
-
-
-
-
-
- -
Daily
Off -Road 1.04
0.87 8.08
10.1 0.02
0.33 -
0.33 0.31
-
0.31 -
Equipment
Onsite 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00 -
truck
Annual -
-
-
-
-
-
- -
Off -Road 0.19
0.16 1.47
1.84 < 0.005
0.06 -
0.06 0.06
-
0.06 -
Equipment
Onsite 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00 -
truck
Offsite -
-
-
-
-
-
-
-
-
-
- -
Daily, -
-
-
-
-
-
-
-
-
-
- -
Summer
(Max)
Worker 0.23
0.21 0.20
3.59 0.00
0.00 0.60
0.60 0.00
0.14 0.14 -
Vendor 0.04
0.01 0.40
0.22 < 0.005
0.01 0.10
0.11 0.01
0.03 0.03 -
2,630
2,630
0.11 0.02
- 2,639
0.00 0.00
0.00 0.00
0.00 0.00
2,630
2,630
0.11 0.02 -
2,639
0.00 0.00
0.00 0.00 0.00
0.00 1,879
1,879
0.08 0.02 -
1,885
0.00 0.00
0.00 0.00 0.00
0.00 311
311
0.01 < 0.005 -
312
0.00 0.00
0.00 0.00 0.00
0.00 649 649 0.03 0.02 2.41 659
360 360 0.03 0.05 1.01 378
15/33
15223 - Rockwell Yucaipa (Construction) Detailed Report, 6/15/2023 Hauling 0.00
0.00 0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
Daily, -
-
-
- -
Winter
(Max)
Worker 0.22
0.20 0.22 2.71
0.00 0.00
0.60 0.60
0.00 0.14
0.14 -
Vendor 0.04
0.01 0.42 0.22
< 0.005
0.01 0.10
0.11 0.01
0.03 0.03 -
Hauling 0.00
0.00 0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
Average -
-
- -
-
-
-
-
-
-
- -
Daily
Worker 0.16
0.14 0.17 2.04
0.00 0.00
0.43 0.43
0.00 0.10
0.10 -
Vendor 0.03
0.01 0.30 0.15
< 0.005
< 0.005
0.07 0.07
< 0.005
0.02 0.02 -
Hauling 0.00
0.00 0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
Annual -
-
- -
-
-
-
-
-
-
- -
Worker 0.03
0.03 0.03 0.37
0.00 0.00
0.08 0.08
0.00 0.02
0.02 -
Vendor < 0.005
< 0.005
0.05 0.03
< 0.005
< 0.005
0.01 0.01
< 0.005
< 0.005
< 0.005 -
Hauling 0.00
0.00 0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
3.11. Paving (2025)
- Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day
for daily, MT/yr for
annual)
Onsite -
-
- -
-
-
-
-
-
-
- -
Daily, -
-
- -
-
-
-
-
-
-
- -
Summer
(Max)
Daily, -
-
- -
-
-
-
-
-
-
- -
Winter
(Max)
Off -Road 0.95
0.80 7.45 9.98
0.01 0.35
-
0.35 0.32
-
0.32 -
Equipment
Paving -
0.73 - -
-
-
-
-
-
-
- -
16/33
0.00 0.00 0.00 0.00 0.00 0.00
595
595
0.03 0.02
0.06 603
360
360
0.03 0.05
0.03 377
0.00 0.00
0.00 0.00
0.00 0.00
431
431
0.02 0.02
0.74 437
257
257
0.02 0.04
0.31 270
0.00 0.00
0.00 0.00
0.00 0.00
71.4 71.4
< 0.005
< 0.005
0.12 72.4
42.6 42.6
< 0.005
0.01 0.05
44.6 0.00
0.00 0.00
0.00 0.00
0.00 1,511 1,511 0.06 0.01 - 1,517
15223 - Rockwell Yucaipa (Construction) Detailed Report, 6/15/2023 Onsite
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
truck
Average
Daily
Off -Road
0.08 0.07
0.61 0.82
< 0.005
0.03 -
0.03 0.03
-
0.03 -
Equipment
Paving
-
0.06 -
-
-
-
-
-
-
-
- -
Onsite
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
truck
Annual
-
-
-
-
-
-
-
-
-
-
- -
Off -Road
0.01 0.01
0.11 0.15
< 0.005
0.01 -
0.01 < 0.005
-
< 0.005 -
Equipment
Paving
-
0.01 -
-
-
Onsite
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
truck
Offsite
-
-
-
-
-
-
-
-
-
-
- -
Daily,
-
-
-
-
-
-
-
-
-
-
- -
Summer
(Max)
Daily,
-
-
-
-
-
-
-
-
-
-
- -
Winter
(Max)
Worker
0.07 0.06
0.07 0.88
0.00 0.00
0.20 0.20
0.00 0.05
0.05 -
Vendor
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
Hauling
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
Average
-
-
-
-
-
-
-
-
Daily
Worker
0.01 0.01
0.01 0.08
0.00 0.00
0.02 0.02
0.00 < 0.005
< 0.005 -
Vendor
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
Hauling
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
Annual
-
-
-
-
-
-
-
-
-
-
- -
Worker
< 0.005
< 0.005
< 0.005
0.01 0.00
0.00 < 0.005
< 0.005
0.00 < 0.005
< 0.005 -
17/33
0.00 0.00 0.00 0.00 0.00 0.00
124
124
0.01 < 0.005 -
125
0.00 0.00
0.00 0.00 0.00
0.00 20.6
20.6 < 0.005
< 0.005 -
20.6 0.00
0.00 0.00
0.00 0.00
0.00 194
194
0.01 0.01
0.02 196
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
16.2 16.2
< 0.005
< 0.005
0.03 16.4
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
2.67 2.67
< 0.005
< 0.005
< 0.005
2.71 15223 - Rockwell Yucaipa (Construction) Detailed Report, 6/15/2023 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 -
3.13. Architectural Coating (2025) - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Onsite
Daily, -
-
-
-
-
- -
-
- -
- -
Summer
(Max)
Daily,
Winter
(Max)
Off -Road 0.21
0.17 1.18
1.52 < 0.005
0.04 -
0.04 0.03 -
0.03 -
Equipment
Architect -
61.5 -
-
-
- -
-
- -
- -
ural
Coatings
Onsite 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00 0.00
0.00 -
truck
Average -
-
-
-
-
- -
-
- -
- -
Daily
Off -Road 0.02
0.01 0.10
0.12 < 0.005
< 0.005 -
< 0.005
< 0.005 -
< 0.005 -
Equipment
Architect -
5.06 -
-
-
- -
-
- -
- -
ural
Coatings
Onsite 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00 0.00
0.00 -
truck
Annual -
-
-
-
-
- -
-
- -
- -
Off -Road < 0.005
< 0.005
0.02 0.02
< 0.005
< 0.005 -
< 0.005
< 0.005 -
< 0.005 -
Equipment
0.00 0.00 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00 0.00
178 178 0.01 < 0.005 - 179
0.00 0.00
0.00 0.00 0.00
0.00 14.6
14.6 < 0.005
< 0.005 -
14.7 0.00
0.00 0.00
0.00 0.00
0.00 2.42
2.42 < 0.005
< 0.005 -
2.43 18/33
15223 - Rockwell Yucaipa (Construction) Detailed Report, 6/15/2023 Architect - 0.92 - -
-
-
- -
Coatings
Onsite 0.00 0.00 0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
truck
Offsite - -
-
- -
Daily, -
-
Summer
(Max)
Daily, - - - -
- -
-
-
-
-
- -
Winter
(Max)
Worker 0.04 0.04 0.04 0.54
0.00 0.00
0.12 0.12
0.00 0.03
0.03 -
Vendor 0.00 0.00 0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
Hauling 0.00 0.00 0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
Average - - - -
- -
-
-
-
-
- -
Daily
Worker < 0.005 < 0.005 < 0.005 0.05
0.00 0.00
0.01 0.01
0.00 < 0.005
< 0.005 -
Vendor 0.00 0.00 0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
Hauling 0.00 0.00 0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
Annual - - - -
- -
-
-
-
-
- -
Worker < 0.005 < 0.005 < 0.005 0.01
0.00 0.00
< 0.005
< 0.005
0.00 < 0.005
< 0.005 -
Vendor 0.00 0.00 0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
Hauling 0.00 0.00 0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
4. Operations Emissions
Details
4.10. Soil Carbon Accumulation
By Vegetation
Type
4.10.1. Soil Carbon Accumulation By
Vegetation Type
- Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for
daily, MT/yr for
annual)
19/33
0.00 0.00 0.00 0.00 0.00 0.00
119
119
0.01 < 0.005
0.01 121
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
9.92 9.92
< 0.005
< 0.005
0.02 10.1
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
1.64 1.64
< 0.005
< 0.005
< 0.005
1.67 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 15223 - Rockwell Yucaipa (Construction) Detailed Report, 6/15/2023 Daily, — — — — — — — — — — — — — — — — — —
Summer
(Max)
Total — — — — — — — — — — — — — — — — — —
Daily, — — — — — — — — — — — — — — — — — —
Winter
(Max)
Total — — — — — — — — — — — — — — — — — —
Annual— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
4.10.2. Above and Belowground Carbon Accumulation by Land Use Type - Unmitigated Daily, — — — — — — — — — — — — — — — — — —
Summer
(Max)
Total— — — — — — — — — — — — — — — — — —
Daily, — — — — — — — — — — — — — — — — — —
Winter
(Max)
Total — — — — — —
Annual — — — — — —
Total — — — — — — — — — — — — — — — — — —
4.10.3. Avoided and Sequestered Emissions by Species - Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) 20 / 33
15223 - Rockwell Yucaipa (Construction) Detailed Report, 6/15/2023 Daily,
Summer
(Max)
Avoided
Subtotal
Sequest
ered
Subtotal
Remove
d
Subtotal
Daily,
Winter
(Max)
Avoided
Subtotal
Sequest
ered
Subtotal
Remove
d
Subtotal
Annual
Avoided
Subtotal
Sequest
ered
Subtotal
21 / 33
15223 - Rockwell Yucaipa (Construction) Detailed Report, 6/15/2023 Remove - -
-
-
-
- -
-
-
-
-
- -
-
- -
d
Subtotal - - - -
- - - - -
-
-
-
-
-
-
- -
- -
-
-
-
-
-
-
-
-
- -
- -
-
-
- -
- -
5. Activity Data
5.1. Construction Schedule
Days Per
Week
Work
Days per Phase
Phase
Description
Demolition Demolition
1 /1 /2024
2/8/2024
5.00 29.0
20 Site Preparation Site Preparation
2/9/2024
2/29/2024
5.00 15.0
10 Grading Grading
3/1 /2024
4/30/2024
5.00 43.0
30 Building Construction Building Construction
5/1/2024
12/31/2025
5.00 436
300
Paving Paving
11 /20/2025
12/31/2025
5.00 30.0
20 Architectural Coating Architectural Coating
11/20/2025
12/31/2025
5.00 30.0
20 5.2. Off -Road Equipment
5.2.1. Unmitigated
Equipment Type
Number per
Day
Hours Per
Day
Horsepower
Demolition Concrete/Industrial
Diesel
Average
1.00 8.00
33.0 0.73
Saws
Demolition Excavators
Diesel
Average
3.00 8.00
36.0 0.38
Demolition Rubber Tired Dozers
Diesel
Average
2.00 8.00
367
0.40 Site Preparation Rubber Tired Dozers
Diesel
Average
3.00 8.00
367
0.40 Site Preparation Crawler Tractors
Diesel
Average
4.00 8.00
84.0 0.37
Grading Excavators
Diesel
Average
2.00 8.00
36.0 0.38
22 / 33
15223 - Rockwell Yucaipa (Construction) Detailed Report, 6/15/2023 Grading
Graders
Diesel
Average
1.00 8.00
148
0.41 Grading
Rubber Tired Dozers
Diesel
Average
1.00 8.00
367
0.40 Grading
Scrapers
Diesel
Average
2.00 8.00
423
0.48 Grading
Crawler Tractors
Diesel
Average
2.00 8.00
84.0 0.37
Building Construction
Cranes
Diesel
Average
1.00 8.00
367
0.29 Building Construction
Forklifts
Diesel
Average
3.00 8.00
82.0 0.20
Building Construction
Generator Sets
Diesel
Average
1.00 8.00
14.0 0.74
Building Construction
Tractors/Loaders/Backh
Diesel
Average
3.00 8.00
84.0 0.37
oes
Building Construction
Welders
Diesel
Average
1.00 8.00
46.0 0.45
Paving
Pavers
Diesel
Average
2.00 8.00
81.0 0.42
Paving
Paving Equipment
Diesel
Average
2.00 8.00
89.0 0.36
Paving
Rollers
Diesel
Average
2.00 8.00
36.0 0.38
Architectural Coating
Air Compressors
Diesel
Average
1.00 8.00
37.0 0.48
5.3. Construction Vehicles
5.3.1. Unmitigated
Demolition
-
-
-
-
Demolition
Worker
15.0 18.5
LDA,LDT1,LDT2
Demolition
Vendor
0.78 10.2
HHDT,MHDT
Demolition
Hauling
0.93 20.0
HHDT
Demolition
Onsite truck
-
-
HHDT
Site Preparation
-
-
-
Site Preparation
Worker
17.5 18.5
LDA,LDT1,LDT2
Site Preparation
Vendor
0.40 10.2
HHDT,MHDT
Site Preparation
Hauling
0.00 20.0
HHDT
23 / 33
15223 - Rockwell Yucaipa (Construction) Detailed Report, 6/15/2023 Site Preparation
Onsite truck
—
—
HHDT
Grading
—
—
—
—
Grading
Worker
20.0 18.5
LDA,LDT1,LDT2
Grading
Vendor
1.15 10.2
HHDT,MHDT
Grading
Hauling
27.5 20.0
HHDT
Grading
Onsite truck
—
—
HHDT
Building Construction
—
—
—
—
Building Construction
Worker
46.1 18.5
LDA,LDT1,LDT2
Building Construction
Vendor
11.7 10.2
HHDT,MHDT
Building Construction
Hauling
0.00 20.0
HHDT
Building Construction
Onsite truck
—
—
HHDT
Paving
—
—
—
—
Paving
Worker
15.0 18.5
LDA,LDT1,LDT2
Paving
Vendor
—
10.2 HHDT,MHDT
Paving
Hauling
0.00 20.0
HHDT
Paving
Onsite truck
—
—
HHDT
Architectural Coating
—
—
—
—
Architectural Coating
Worker
9.22 18.5
LDA,LDT1,LDT2
Architectural Coating
Vendor
—
10.2 HHDT,MHDT
Architectural Coating
Hauling
0.00 20.0
HHDT
Architectural Coating
Onsite truck
—
—
HHDT
5.4. Vehicles
5.4.1. Construction Vehicle Control Strategies
Non -applicable. No control strategies activated by user.
5.5. Architectural Coatings
24/33
15223 - Rockwell Yucaipa (Construction) Detailed Report, 6/15/2023 Architectural Coating 564,060
5.6. Dust Mitigation
5.6.1. Construction Earthmoving Activities
Phase Name
Demolition
0.00 Site Preparation
—
Grading
9,450
Paving
0.00 5.6.2. Construction Earthmoving Control Strategies Water Exposed Area
5.7. Construction Paving
Cl
188,020
HE
M
21,925
0.00 0.00
2,300 -
- 52.5
0.00 -
- 172
0.00 —
0.00 0.00
0.00 9.80
74%
Single Family Housing 1.41 0%
Parking Lot 0.73 100%
Other Asphalt Surfaces 7.66 100%
5.8. Construction Electricity Consumption and Emissions Factors kWh per Year and Emission Factor (lb/MWh)
74%
25 / 33
15223 - Rockwell Yucaipa (Construction) Detailed Report, 6/15/2023 2024
2025
5.18. Vegetation
5.18.1. Land Use Change
5.18.1.1. Unmitigated
5.18.1. Biomass Cover Type
5.18.1.1. Unmitigated
0.00 532 0.03 < 0.005
0.00 532 0.03 < 0.005
Biomass Cover Type Initial Acres Final Acres
5.18.2. Sequestration
5.18.2.1. Unmitigated
6. Climate Risk Detailed Report
6.1. Climate Risk Summary
Cal -Adapt midcentury 2040-2059 average projections for four hazards are reported below for your project location. These are under Representation Concentration Pathway (RCP) 8.5 which assumes GHG emissions will continue to rise strongly through 2050 and then plateau around 2100.
Temperature and Extreme Heat
Extreme Precipitation
26.4 4.05
annual days of extreme heat
annual days with precipitation above 20 mm
26 / 33
15223 - Rockwell Yucaipa (Construction) Detailed Report, 6/15/2023 Sea Level Rise 0.00 meters of inundation depth
Wildfire 21.3 annual hectares burned
Temperature and Extreme Heat data are for grid cell in which your project are located. The projection is based on the 98th historical percentile of daily maximum/minimum temperatures from observed historical data (32 climate model ensemble from Cal -Adapt, 2040-2059 average under RCP 8.5). Each grid cell is 6 kilometers (km) by 6 km, or 3.7 miles (mi) by 3.7 mi.
Extreme Precipitation data are for the grid cell in which your project are located. The threshold of 20 mm is equivalent to about 3/4 an inch of rain, which would be light to moderate rainfall if received over a full day or heavy rain if received over a period of 2 to 4 hours. Each grid cell is 6 kilometers (km) by 6 km, or 3.7 miles (mi) by 3.7 mi.
Sea Level Rise data are for the grid cell in which your project are located. The projections are from Radke et al. (2017), as reported in Cal -Adapt (2040-2059 average under RCP 8.5), and consider different increments of sea level rise coupled with extreme storm events. Users may select from four model simulations to view the range in potential inundation depth for the grid cell. The four simulations make different assumptions about expected rainfall and temperature are: Warmer/drier (HadGEM2-ES), Cooler/wetter (CNRM-CM5), Average conditions (CanESM2), Range of different rainfall and temperature possibilities (MIR005). Each grid cell is 50 meters (m) by 50 m, or about 164 feet (ft) by 164 ft.
Wildfire data are for the grid cell in which your project are located. The projections are from UC Davis, as reported in Cal -Adapt (2040-2059 average under RCP 8.5), and consider historical data of climate, vegetation, population density, and large (> 400 ha) fire history. Users may select from four model simulations to view the range in potential wildfire probabilities for the grid cell. The four simulations make different assumptions about expected rainfall and temperature are: Warmer/drier (HadGEM2-ES), Cooler/wetter (CNRM-CM5), Average conditions (CanESM2), Range of different rainfall and temperature possibilities (MIR005). Each grid cell is 6 kilometers (km) by 6 km, or 3.7 miles (mi) by 3.7 mi.
6.2. Initial Climate Risk Scores
Temperature and Extreme Heat
3 0
0 N/A
Extreme Precipitation
N/A
N/A
N/A
N/A
Sea Level Rise
1 0
0 N/A
Wildfire
1 0
0 N/A
Flooding
N/A
N/A
N/A
N/A
Drought
N/A
N/A
N/A
N/A
Snowpack Reduction
N/A
N/A
N/A
N/A
Air Quality Degradation
0 0
0 N/A
The sensitivity score reflects the extent to which a project would be adversely affected by exposure to a climate hazard. Exposure is rated on a scale of 1 to 5, with a score of 5 representing the greatest exposure.
The adaptive capacity of a project refers to its ability to manage and reduce vulnerabilities from projected climate hazards. Adaptive capacity is rated on a scale of 1 to 5, with a score of 5 representing the greatest ability to adapt.
The overall vulnerability scores are calculated based on the potential impacts and adaptive capacity assessments for each hazard. Scores do not include implementation of climate risk reduction measures.
6.3. Adjusted Climate Risk Scores
27 / 33
15223 - Rockwell Yucaipa (Construction) Detailed Report, 6/15/2023 Temperature and Extreme Heat
3 1
1 3
Extreme Precipitation
N/A
N/A
N/A
N/A
Sea Level Rise
1 1
1 2
Wildfire
1 1
1 2
Flooding
N/A
N/A
N/A
N/A
Drought
N/A
N/A
N/A
N/A
Snowpack Reduction
N/A
N/A
N/A
N/A
Air Quality Degradation
1 1
1 2
The sensitivity score reflects the extent to which a project would be adversely affected by exposure to a climate hazard. Exposure is rated on a scale of 1 to 5, with a score of 5 representing the greatest exposure.
The adaptive capacity of a project refers to its ability to manage and reduce vulnerabilities from projected climate hazards. Adaptive capacity is rated on a scale of 1 to 5, with a score of 5 representing the greatest ability to adapt.
The overall vulnerability scores are calculated based on the potential impacts and adaptive capacity assessments for each hazard. Scores include implementation of climate risk reduction measures.
6.4. Climate Risk Reduction Measures
7. Health and Equity Details
7.1. CalEnviroScreen 4.0 Scores
The maximum CalEnviroScreen score is 100. A high score (i.e., greater than 50) reflects a higher pollution burden compared to other census tracts in the state.
Exposure Indicators
AQ-Ozone
100
AQ-PM
52.8 AQ-DPM
81.7 Drinking Water
44.3 Lead Risk Housing
73.7 Pesticides
17.7 Toxic Releases
42.3 28 / 33
15223 - Rockwell Yucaipa (Construction) Detailed Report, 6/15/2023 Traffic
Effect Indicators
Cleanup Sites
Groundwater
Haz Waste Facilities/Generators
Impaired Water Bodies
Solid Waste
Sensitive Population
Asthma
Cardio-vascular
Low Birth Weights
Socioeconomic Factor Indicators
Education
Housing
Linguistic
Poverty
Unemployment
7.2. Healthy Places Index Scores
The maximum Health Places Index score is 100. A
Economic
Above Poverty
Employed
Median HI
Education
Bachelor's or higher
Me
53.4 59.6
75.8 0.00
0.00 39.3
73.6 19.6
54.6 76.0
7.38 60.8
51.3 score (i.e., greater than 50) reflects healthier community conditions co
22.6356987
16.72013345
24.76581548
29.77030669
to other census tracts in the state.
29 / 33
15223 - Rockwell Yucaipa (Construction) Detailed Report, 6/15/2023 High school enrollment
Preschool enrollment
Transportation
Auto Access
Active commuting
Social
2-parent households
Voting
Neighborhood
Alcohol availability
Park access
Retail density
Supermarket access
Tree canopy
Housing
Homeownership
Housing habitability
Low-inc homeowner severe housing cost burden
Low-inc renter severe housing cost burden
Uncrowded housing
Health Outcomes
Insured adults
Arthritis
Asthma ER Admissions
High Blood Pressure
Cancer (excluding skin)
Asthma
100
14.08956756
27.10124471
35.09559861
28.53843193
36.75093032
57.82112152
2.194276915
23.09765174
23.70075709
8.250994482
34.58231746
17.75952778
47.22186578
27.97382266
45.28422944
40.74169126
0.0 55.2
0.0 0.0
0.0 30 / 33
15223 - Rockwell Yucaipa (Construction) Detailed Report, 6/15/2023 Coronary Heart Disease
0.0 Chronic Obstructive Pulmonary Disease
0.0 Diagnosed Diabetes
0.0 Life Expectancy at Birth
24.5 Cognitively Disabled
2.3 Physically Disabled
3.2 Heart Attack ER Admissions
16.5 Mental Health Not Good
0.0 Chronic Kidney Disease
0.0 Obesity
0.0 Pedestrian Injuries
51.5 Physical Health Not Good
0.0 Stroke
0.0 Health Risk Behaviors
—
Binge Drinking
0.0 Current Smoker
0.0 No Leisure Time for Physical Activity
0.0 Climate Change Exposures
—
Wildfire Risk
1.1 SLR Inundation Area
0.0 Children
24.2 Elderly
45.2 English Speaking
62.1 Foreign -born
14.1 Outdoor Workers
39.5 Climate Change Adaptive Capacity
—
Impervious Surface Cover
88.7 31 / 33
15223 - Rockwell Yucaipa (Construction) Detailed Report, 6/15/2023 Traffic Density
69.9 Traffic Access
23.0 Other Indices
—
Hardship
65.5 Other Decision Support
—
2016 Voting
56.5 7.3. Overall Health & Equity Scores
CalEnviroScreen 4.0 Score for Project Location (a) 61.0 Healthy Places Index Score for Project Location (b) 16.0 Project Located in a Designated Disadvantaged Community (Senate Bill 535) No Project Located in a Low -Income Community (Assembly Bill 1550) Yes Project Located in a Community Air Protection Program Community (Assembly Bill 617) No a: The maximum CalEnviroScreen score is 100. A high score (i.e., greater than 50) reflects a higher pollution burden compared to other census tracts in the state. b: The maximum Health Places Index score is 100. A high score (i.e., greater than 50) reflects healthier community conditions compared to other census tracts in the state.
7.4. Health & Equity Measures
No Health & Equity Measures selected.
7.5. Evaluation Scorecard
Health & Equity Evaluation Scorecard not completed.
7.6. Health & Equity Custom Measures
No Health & Equity Custom Measures created.
8. User Changes to Default Data
Land Use Data taken from site plan
32 / 33
15223 - Rockwell Yucaipa (Construction) Detailed Report, 6/15/2023 Operations: Vehicle Data Trip characteristics based on information provided in the traffic analysis Operations: Hearths SCAQMD Rule 445 no wood burning devices. Wood burning devices added to gas devices.
Operations: Architectural Coatings SCAQMD Rule 1113
Operations: Refrigerants Beginning 1 January 2025, all new air conditioning equipment may not use refrigerants with a GWP of 750 or greater.
Construction: Construction Phases Taken from client data, Building, Paving, and Architectural Coating overlap to present a conservative analysis. Construction schedule expanded to account for 2025 Opening Year Construction: Off -Road Equipment T/L/B replaced with Crawler Tractor to accurately calculate disturbance for Site Preparation and Grading phases. Standard 8 hours work days
Construction: Trips and VMT Vendor Trips adjusted based on CalEEMod defaults for Building Construction and number of days for Demolition, Site Preparation, Grading, and Building Construction Construction: Architectural Coatings SCAQMD Rule 1113
33 / 33
Rockwell Technical Studies Greenhouse Gas Analysis
This page intentionally left blank
15223-03 GHG Report
Lv► URBAN
Rockwell Technical Studies Greenhouse Gas Analysis
APPENDIX 3.2:
PROJECT CALEEMOD OPERATIONAL EMISSIONS MODEL OUTPUTS
15223-03 GHG Report
L1 URBAN
15223 - Rockwell Yucaipa (Operations) Detailed Report, 6/15/2023 15223 -Rockwell Yucaipa (Operations) Detailed Report
Table of Contents
1. Basic Project Information
1.1. Basic Project Information
1.2. Land Use Types
1.3. User -Selected Emission Reduction Measures by Emissions Sector
2. Emissions Summary
2.4. Operations Emissions Compared Against Thresholds
2.5. Operations Emissions by Sector, Unmitigated
4. Operations Emissions Details
4.1. Mobile Emissions by Land Use
4.1.1. Unmitigated
4.2. Energy
4.2.1. Electricity Emissions By Land Use - Unmitigated
4.2.3. Natural Gas Emissions By Land Use - Unmitigated
4.3. Area Emissions by Source
1 / 32
15223 - Rockwell Yucaipa (Operations) Detailed Report, 6/15/2023
4.3.2. Unmitigated
4.4. Water Emissions by Land Use
4.4.2. Unmitigated
4.5. Waste Emissions by Land Use
4.5.2. Unmitigated
4.6. Refrigerant Emissions by Land Use
4.6.1. Unmitigated
4.7. Offroad Emissions By Equipment Type
4.7.1. Unmitigated
4.8. Stationary Emissions By Equipment Type
4.8.1. Unmitigated
4.9. User Defined Emissions By Equipment Type
4.9.1. Unmitigated
4.10. Soil Carbon Accumulation By Vegetation Type
4.10.1. Soil Carbon Accumulation By Vegetation Type - Unmitigated
4.10.2. Above and Belowground Carbon Accumulation by Land Use Type - Unmitigated
4.10.3. Avoided and Sequestered Emissions by Species - Unmitigated 2/32
15223 - Rockwell Yucaipa (Operations) Detailed Report, 6/15/2023
5. Activity Data
5.9. Operational Mobile Sources
5.9.1. Unmitigated
5.10. Operational Area Sources
5.10.1. Hearths
5.10.1.1. Unmitigated
5.10.2. Architectural Coatings
5.10.3. Landscape Equipment
5.11. Operational Energy Consumption
5.11.1. Unmitigated
5.12. Operational Water and Wastewater Consumption
5.12.1. Unmitigated
5.13. Operational Waste Generation
5.13.1. Unmitigated
5.14. Operational Refrigeration and Air Conditioning Equipment
5.14.1. Unmitigated
5.15. Operational Off -Road Equipment
3/32
15223 - Rockwell Yucaipa (Operations) Detailed Report, 6/15/2023
5.15.1. Unmitigated
5.16. Stationary Sources
5.16.1. Emergency Generators and Fire Pumps
5.16.2. Process Boilers
5.17. User Defined
5.18. Vegetation
5.18.1. Land Use Change
5.18.1.1. Unmitigated
5.18.1. Biomass Cover Type
5.18.1.1. Unmitigated
5.18.2. Sequestration
5.18.2.1. Unmitigated
6. Climate Risk Detailed Report
6.1. Climate Risk Summary
6.2. Initial Climate Risk Scores
6.3. Adjusted Climate Risk Scores
6.4. Climate Risk Reduction Measures
4/32
15223 - Rockwell Yucaipa (Operations) Detailed Report, 6/15/2023
7. Health and Equity Details
7.1. CalEnviroScreen 4.0 Scores
7.2. Healthy Places Index Scores
7.3. Overall Health & Equity Scores
7.4. Health & Equity Measures
7.5. Evaluation Scorecard
7.6. Health & Equity Custom Measures
8. User Changes to Default Data
5/32
15223 - Rockwell Yucaipa (Operations) Detailed Report, 6/15/2023
1. Basic Project Information
1.1. Basic Project Information
Project Name
Operational Year
Lead Agency
Land Use Scale
Analysis Level for Defaults
Windspeed (m/s)
Precipitation (days)
Location
County
City
Air District
Air Basin
TAZ
EDFZ
Electric Utility
Gas Utility
App Version
1.2. Land Use Types
Single Family 128
Housing
Dwelling Unit 6.39
15223 - Rockwell Yucaipa (Operations)
2025
Project/site
County
2.50 1.80
32994 Avenue E, Yucaipa, CA 92399, USA
San Bernardino -South Coast
Yucaipa
South Coast AQMD
South Coast
5166
10 Southern California Edison
Southern California Gas
2022.1.1.13
278,548
1,499,246 —
424
6/32
15223 - Rockwell Yucaipa (Operations) Detailed Report, 6/15/2023 Parking Lot 81.0 Space 0.73 0.00 0.00
Other Asphalt 7.66 Acre 7.66 0.00 0.00
Surfaces
1.3. User -Selected Emission Reduction Measures by Emissions Sector No measures selected
2. Emissions Summary
2.4. Operations Emissions Compared Against Thresholds
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual Daily, - - - - - - -
-
-
-
-
Summer
(Max)
Unmit. 6.39 12.2 7.39 49.8 0.12 0.31 3.27
3.58 0.30
0.58 0.89
Daily, - - - - - - -
-
-
-
-
Winter
(Max)
Unmit. 5.35 11.2 7.64 36.0 0.11 0.30 3.27
3.57 0.30
0.58 0.88
Average - - - - - - -
-
-
-
-
Daily
(Max)
Unmit. 5.48 11.4 5.90 40.8 0.10 0.16 3.21
3.37 0.16
0.57 0.73
Annual - - - - - - -
-
-
-
-
(Max)
Unmit. 1.00 2.08 1.08 7.44 0.02 0.03 0.59
0.61 0.03
0.10 0.13
2.5. Operations Emissions by Sector, Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual)
7/32
Guest parking
76.9 14,895 14,972 8.46
0.50 39.0 15,373
76.9 14,247 14,324 8.48
0.52 2.75 14,694
76.9 11,920 11,997 8.43
0.51 17.6 12,377
12.7 1,973 1,986 1.40
0.08 2.91 2,049
15223 - Rockwell Yucaipa (Operations) Detailed Report, 6/15/2023 Daily,
Summer
(Max)
Mobile
5.36 4.88
4.39 41.3
0.10 0.07
3.27 3.34
0.06 0.58
0.65 -
10,025
10,025
0.48 0.46
37.2 10,211
Area
0.91 7.26
1.98 8.06
0.01 0.16
-
0.16 0.16
-
0.16 0.00
2,445
2,445
0.05 < 0.005
-
2,448
Energy
0.12 0.06
1.01 0.43
0.01 0.08
-
0.08 0.08
-
0.08 -
2,241
2,241
0.20 0.01
-
2,250
Water
-
-
-
-
-
-
-
-
-
-
-
10.2 184
194
1.07 0.03
-
229
Waste
-
-
-
-
-
-
-
-
-
-
-
66.7 0.00
66.7 6.67
0.00 -
233
Refrig.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1.78 1.78
Total
6.39 12.2
7.39 49.8
0.12 0.31
3.27 3.58
0.30 0.58
0.89 76.9
14,895
14,972
8.46 0.50
39.0 15,373
Daily,
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Winter
(Max)
Mobile
5.00 4.52
4.72 34.7
0.09 0.07
3.27 3.34
0.06 0.58
0.65 -
9,397
9,397
0.50 0.48
0.97 9,552
Area
0.22 6.61
1.91 0.81
0.01 0.15
-
0.15 0.15
-
0.15 0.00
2,426
2,426
0.05 < 0.005
-
2,428
Energy
0.12 0.06
1.01 0.43
0.01 0.08
-
0.08 0.08
-
0.08 -
2,241
2,241
0.20 0.01
-
2,250
Water
-
-
-
-
-
-
-
-
-
-
-
10.2 184
194
1.07 0.03
-
229
Waste
-
-
-
-
-
-
-
-
-
-
-
66.7 0.00
66.7 6.67
0.00 -
233
Refrig.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1.78 1.78
Total
5.35 11.2
7.64 36.0
0.11 0.30
3.27 3.57
0.30 0.58
0.88 76.9
14,247
14,324
8.48 0.52
2.75 14,694
Average
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Daily
Mobile
4.87 4.40
4.71 35.3
0.09 0.07
3.21 3.27
0.06 0.57
0.63 -
9,316
9,316
0.49 0.47
15.8 9,484
Area
0.49 6.95
0.18 5.02
< 0.005
0.01 -
0.01 0.01
-
0.01 0.00
179
179
< 0.005
< 0.005
-
180
Energy
0.12 0.06
1.01 0.43
0.01 0.08
-
0.08 0.08
-
0.08 -
2,241
2,241
0.20 0.01
-
2,250
Water
-
-
-
-
-
10.2 184
194
1.07 0.03
-
229
Waste
-
-
-
-
-
-
-
-
-
-
-
66.7 0.00
66.7 6.67
0.00 -
233
Refrig.
-
-
-
-
-
-
-
-
-
-
1.78 1.78
8/32
15223 - Rockwell Yucaipa (Operations) Detailed Report, 6/15/2023 Total
5.48 11.4
5.90 40.8
0.10 0.16 3.21
3.37 0.16 0.57
0.73 76.9
11,920
11,997
8.43 0.51
17.6 12,377
Annual
-
-
-
-
-
-
-
-
-
-
-
Mobile
0.89 0.80
0.86 6.44
0.02 0.01 0.59
0.60 0.01 0.10
0.12 -
1,542
1,542
0.08 0.08
2.61 1,570
Area
0.09 1.27
0.03 0.92
< 0.005
< 0.005 -
< 0.005
< 0.005 -
< 0.005
0.00 29.7
29.7 < 0.005
< 0.005
-
29.7 Energy
0.02 0.01
0.18 0.08
< 0.005
0.01 -
0.01 0.01 -
0.01 -
371
371
0.03 < 0.005
-
372
Water
-
-
-
1.69 30.4
32.1 0.18
< 0.005
-
37.9 Waste
-
-
-
-
-
- -
-
- -
-
11.0 0.00
11.0 1.10
0.00 -
38.6 Refrig.
-
-
-
-
-
0.30 0.30
Total
1.00 2.08
1.08 7.44
0.02 0.03 0.59
0.61 0.03 0.10
0.13 12.7
1,973
1,986
1.40 0.08
2.91 2,049
4. Operations Emissions Details
4.1. Mobile Emissions by Land Use
4.1.1. Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Daily,
Summer
(Max)
Single
5.36 4.88
4.39 41.3
0.10 0.07
3.27 3.34
0.06 0.58
0.65 -
Family
Housing
Parking
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
Lot
Other
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
Asphalt
Surfaces
Total
5.36 4.88
4.39 41.3
0.10 0.07
3.27 3.34
0.06 0.58
0.65 -
9/32
10,025
10,025
0.48 0.46
37.2 10,211
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
10,025
10,025
0.48 0.46
37.2 10,211
15223 - Rockwell Yucaipa (Operations) Detailed Report, 6/15/2023 Daily,
-
-
-
-
-
-
-
-
-
-
- -
Winter
(Max)
Single
5.00 4.52
4.72 34.7
0.09 0.07
3.27 3.34
0.06 0.58
0.65 -
Family
Housing
Parking
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
Lot
Other
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
Asphalt
Surfaces
Total
5.00 4.52
4.72 34.7
0.09 0.07
3.27 3.34
0.06 0.58
0.65 -
Annual
-
-
-
-
-
-
-
-
Single
0.89 0.80
0.86 6.44
0.02 0.01
0.59 0.60
0.01 0.10
0.12 -
Family
Housing
Parking
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
Lot
Other
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 -
Asphalt
Surfaces
Total
0.89 0.80
0.86 6.44
0.02 0.01
0.59 0.60
0.01 0.10
0.12 -
4.2. Energy
4.2.1. Electricity Emissions By Land Use - Unmitigated
Criteria Pollutants (lb/dav for dailv. ton/vr for annual) and GHGs (lb/dav for dailv. MT/vr for annual) 9,397
9,397
0.50 0.48
0.97 9,552
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
9,397
9,397
0.50 0.48
0.97 9,552
1,542
1,542
0.08 0.08
2.61 1,570
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
1,542
1,542
0.08 0.08
2.61 1,570
Daily, - - - - - - - - - - - - - - - - - -
Summer
(Max)
10/32
15223 - Rockwell Yucaipa (Operations) Detailed Report, 6/15/2023 Single - - - - - -
- - - - - - 930
930
0.09 0.01 -
936
Family
Housing
Parking - - - - - -
- - - - - - 26.6
26.6 < 0.005
< 0.005 -
26.7 Lot
Other - - - - - -
- - - - - - 0.00
0.00 0.00
0.00 -
0.00 Asphalt
Surfaces
Total - - - - - -
- - - - - - 957
957
0.09 0.01 -
962
Daily, - - - - - -
- - - - - - -
-
-
-
Winter
(Max)
Single - - - - - -
- - - - - - 930
930
0.09 0.01 -
936
Family
Housing
Parking - - - - - -
- - - - - - 26.6
26.6 < 0.005
< 0.005 -
26.7 Lot
Other - - - - - -
- - - - - - 0.00
0.00 0.00
0.00 -
0.00 Asphalt
Surfaces
Total - - - - - - - - - - - - 957 957 0.09 0.01 - 962
Annual - - - - - - - - - - - - - - - - - -
Single - - - - - - - - - - - - 154 154 0.01 < 0.005 - 155 Family
Housing
Parking - - - - - - - - - - - - 4.40 4.40 < 0.005 < 0.005 - 4.42 Lot
Other - - - - - 0.00 0.00 0.00 0.00 - 0.00
Asphalt
Surfaces
Total - - - - - - - - - - - - 158 158 0.01 < 0.005 - 159
4.2.3. Natural Gas Emissions By Land Use - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) 11 / 32
15223 - Rockwell Yucaipa (Operations) Detailed Report, 6/15/2023 Daily,
-
-
-
-
-
- -
-
- -
-
Summer
(Max)
Single
0.12 0.06
1.01 0.43
0.01 0.08 -
0.08 0.08 -
0.08 -
1,284
1,284
0.11 < 0.005 -
1,287
Family
Housing
Parking
0.00 0.00
0.00 0.00
0.00 0.00 -
0.00 0.00 -
0.00 -
0.00 0.00
0.00 0.00 -
0.00 Lot
Other
0.00 0.00
0.00 0.00
0.00 0.00 -
0.00 0.00 -
0.00 -
0.00 0.00
0.00 0.00 -
0.00 Asphalt
Surfaces
Total
0.12 0.06
1.01 0.43
0.01 0.08 -
0.08 0.08 -
0.08 -
1,284
1,284
0.11 < 0.005 -
1,287
Daily,
-
-
-
-
-
- -
-
- -
- -
-
-
-
- -
-
Winter
(Max)
Single
0.12 0.06
1.01 0.43
0.01 0.08 -
0.08 0.08 -
0.08 -
1,284
1,284
0.11 < 0.005 -
1,287
Family
Housing
Parking
0.00 0.00
0.00 0.00
0.00 0.00 -
0.00 0.00 -
0.00 -
0.00 0.00
0.00 0.00 -
0.00 Lot
Other
0.00 0.00
0.00 0.00
0.00 0.00 -
0.00 0.00 -
0.00 -
0.00 0.00
0.00 0.00 -
0.00 Asphalt
Surfaces
Total
0.12 0.06
1.01 0.43
0.01 0.08 -
0.08 0.08 -
0.08 -
1,284
1,284
0.11 < 0.005 -
1,287
Annual-
-
-
-
-
- -
-
- -
- -
-
-
-
- -
-
Single
0.02 0.01
0.18 0.08
< 0.005
0.01 -
0.01 0.01 -
0.01 -
213
213
0.02 < 0.005 -
213
Family
Housing
Parking
0.00 0.00
0.00 0.00
0.00 0.00 -
0.00 0.00 -
0.00 -
0.00 0.00
0.00 0.00 -
0.00 Lot
Other
0.00 0.00
0.00 0.00
0.00 0.00 -
0.00 0.00 -
0.00 -
0.00 0.00
0.00 0.00 -
0.00 Asphalt
Surfaces
12/32
15223 - Rockwell Yucaipa (Operations) Detailed Report, 6/15/2023 Total 0.02 0.01 0.18 0.08 < 0.005 0.01 - 0.01 0.01 - 0.01 - 213 213 0.02 < 0.005 - 213
4.3. Area Emissions by Source
4.3.2. Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Daily, - - - - - - - - - - - - - - -
- - -
Summer
(Max)
Hearths 0.22 0.11 1.91 0.81 0.01 0.15 - 0.15 0.15 - 0.15 0.00 2,426 2,426 0.05 < 0.005 - 2,428
Consum - 5.99 - - - - - - - - - - - - -
- - -
er
Products
Architect - 0.51 - - - - - - - - - - - - -
- - -
ural
Coatings
Landsca 0.69 0.65 0.07 7.25 < 0.005 < 0.005 - < 0.005 < 0.005 - < 0.005 - 19.4 19.4 < 0.005 < 0.005 - 19.5
pe
Equipme
nt
Total 0.91 7.26 1.98 8.06 0.01 0.16 - 0.16 0.16 - 0.16 0.00 2,445 2,445 0.05 < 0.005 - 2,448
Daily, - - - - - - - - - - - - - - -
- - -
Winter
(Max)
Hearths 0.22 0.11 1.91 0.81 0.01 0.15 - 0.15 0.15 - 0.15 0.00 2,426 2,426 0.05 < 0.005 - 2,428
Consum - 5.99 - - - - - - - - - - - - -
- - -
er
Products
Architect - 0.51 - - - - - - - - - - -
- - -
ural
Coatings
Total 0.22 6.61 1.91 0.81 0.01 0.15 - 0.15 0.15 - 0.15 0.00 2,426 2,426 0.05 < 0.005 - 2,428
13/32
15223 - Rockwell Yucaipa (Operations) Detailed Report, 6/15/2023 Annual - - - - - - - - - - - - - - - - - -
Hearths < 0.005 < 0.005 0.02 0.01 < 0.005 < 0.005 - < 0.005 < 0.005 - < 0.005 0.00 27.5 27.5 < 0.005 < 0.005 - 27.5 Consum - 1.09 - - - - - - - - - - - - -
er
Products
Architect - 0.09 - - - - - - - - - - - - - - - -
ural
Coatings
Landsca 0.09 0.08 0.01 0.91 < 0.005 < 0.005 - < 0.005 < 0.005 - < 0.005 - 2.20 2.20 < 0.005 < 0.005 - 2.21 pe
Equipme
nt
IC.II�IIII; I�IIG�I�:y�1�1I1��{I�II1�
4.4. Water Emissions by Land Use
4.4.2. Unmitigated
Daily,
Summer
(Max)
Single - - - - - - - - - - - 10.2 184 194 1.07 0.03 - 229 Family
Housing
Parking - - - - - - - - - - - 0.00 0.00 0.00 0.00 0.00 - 0.00 Lot
Other - - - - - - - - - - - 0.00 0.00 0.00 0.00 0.00 - 0.00 Asphalt
Surfaces
Total - - - - - - - - - - - 10.2 184 194 1.07 0.03 - 229 14/32
15223 - Rockwell Yucaipa (Operations) Detailed Report, 6/15/2023 Daily, - - - - - -
- - - - - -
-
-
-
- -
-
Winter
(Max)
Single - - - - - -
- - - - - 10.2
184
194
1.07 0.03 -
229
Family
Housing
Parking - - - - - -
- - - - - 0.00
0.00 0.00
0.00 0.00 -
0.00 Lot
Other - - - - - -
- - - - - 0.00
0.00 0.00
0.00 0.00 -
0.00 Asphalt
Surfaces
Total - -
- - - - - 10.2
184
194
1.07 0.03 -
229
Annual - - - - - -
- - - - - -
-
-
-
- -
-
Single - -
- - - - - 1.69
30.4 32.1
0.18 < 0.005 -
37.9 Family
Housing
Parking - - - - - -
- - - - - 0.00
0.00 0.00
0.00 0.00 -
0.00 Lot
Other - -
- - - - - 0.00
0.00 0.00
0.00 0.00 -
0.00 Asphalt
Surfaces
Total
- - - - - 1.69
30.4 32.1
0.18 < 0.005 -
37.9 4.5. Waste Emissions by Land Use
4.5.2. Unmitigated
Criteria Pollutants (lb/dav for dailv. ton/vr for annual) and GHGs (lb/dav for dailv. MT/vr for annual) Daily, - - - - - - - - - - - - - - - - - -
Summer
(Max)
15/32
15223 - Rockwell Yucaipa (Operations) Detailed Report, 6/15/2023 Single - - - - - -
- - - - - 66.7
0.00 66.7
6.67 0.00 -
233
Family
Housing
Parking - - - - - -
- - - - - 0.00
0.00 0.00
0.00 0.00 -
0.00 Lot
Other - - - - - -
- - - - - 0.00
0.00 0.00
0.00 0.00 -
0.00 Asphalt
Surfaces
Total - - - - - -
- - - - - 66.7
0.00 66.7
6.67 0.00 -
233
Daily, - - - - - -
- - - - - -
-
Winter
(Max)
Single - - - - - -
- - - - - 66.7
0.00 66.7
6.67 0.00 -
233
Family
Housing
Parking - - - - - -
- - - - - 0.00
0.00 0.00
0.00 0.00 -
0.00 Lot
Other - - - - - -
- - - - - 0.00
0.00 0.00
0.00 0.00 -
0.00 Asphalt
Surfaces
Total - - - - - -
- - - - - 66.7
0.00 66.7
6.67 0.00 -
233
Annual - - - - - -
- - - - - -
-
-
-
- -
-
Single - - - - - -
- - - - - 11.0
0.00 11.0
1.10 0.00 -
38.6 Family
Housing
Parking - - - - - -
- - - - - 0.00
0.00 0.00
0.00 0.00 -
0.00 Lot
Other - - -
- - - - 0.00
0.00 0.00
0.00 0.00 -
0.00 Asphalt
Surfaces
Total - - - - - -
- - - - - 11.0
0.00 11.0
1.10 0.00 -
38.6 4.6. Refrigerant Emissions by Land Use
16/32
15223 - Rockwell Yucaipa (Operations) Detailed Report, 6/15/2023
4.6.1. Unmitigated
Criteria Pollutants
Daily, — — — — — — — — — — — — — — — — — —
Summer
(Max)
Single — — — — — — — — — — — — — — — — 1.78 1.78
Family
Housing
Total — — — — — — — — — — — — — — — — 1.78 1.78
Daily, — — — — — — — — — — — — — — — — — —
Winter
(Max)
Single — — — — — —
Family
Housing
Total — — — — — —
Annual
Single — — — — —
Family
Housing
Total — — — — — —
4.7. Offroad Emissions By Equipment Type
4.7.1. Unmitigated
Criteria Pollutants (lb/dav for dailv. ton/vr for annual
1.78 1.78
— — — — — — — — — — 1.78
1.78 — — — — — — — — — 0.30
0.30 — — — — — — — — — — 0.30
0.30 17/32
15223 - Rockwell Yucaipa (Operations) Detailed Report, 6/15/2023 Daily, — — — — — — — — — — — — — — —
Summer
(Max)
Total — — — — — — — — — — — — — — — — — —
Daily, — — — — — — — — — — — — — — — — — —
Winter
(Max)
Total— — — — — — — — — — — — — — — — — —
Annual— — — — — — — — — — — — — — — — — —
Total— — — — — — — — — — — — — — — — — —
4.8. Stationary Emissions By Equipment Type
4.8.1. Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Daily, — — — — — —
Summer
(Max)
Total
Daily,
Winter
(Max)
Total — — — — — —
Annual — — — — — —
Total — — — — — —
4.9. User Defined Emissions By Equipment Type
18/32
15223 - Rockwell Yucaipa (Operations) Detailed Report, 6/15/2023
4.9.1. Unmitigated
Daily, — — — — — — — — — — — — — — — —
Summer
(Max)
Total — — — — — — — — — — — — — — — —
Daily, — — — — — — — — — — — — — — — —
Winter
(Max)
Total— — — — — — — — — — — — — — — —
Annual — — — — — — — — — — — — — — — —
Total— — — — — — — — — — — — — — — —
4.10. Soil Carbon Accumulation By Vegetation Type
4.10.1. Soil Carbon Accumulation By Vegetation Type - Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Daily, — — — —
Summer
(Max)
Total — — — —
Daily, — — — —
Winter
(Max)
Total — — — —
Annual — — — —
- - - - - - - - - - - - - -
- - - - - - - - - - - - - -
19/32
15223 - Rockwell Yucaipa (Operations) Detailed Report, 6/15/2023 Total — — — — — — — — — — — — — —
4.10.2. Above and Belowground Carbon Accumulation by Land Use Type - Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Daily, — — — — — — — — — — — — — — — — — —
Summer
(Max)
Total — — — — — — — — — — — — — — — — — —
Daily, — — — — — — — — — — — — — — — — — —
Winter
(Max)
Total— — — — — — — — — — — — — — — — — —
Annual— — — — — — — — — — — — — — — — — —
Total— — — — — — — — — — — — — — — — — —
4.10.3. Avoided and Sequestered Emissions by Species - Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Daily, — — — — — — — — — — — — — — — — — —
Summer
(Max)
Avoided — — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
Sequest — — — — — — — — — — — — — — — — — —
ered
Subtotal — — — — — — — — — — — — — — — — — —
Remove — — — — — — — — — — — — — — — — — —
d
20 / 32
15223 - Rockwell Yucaipa (Operations) Detailed Report, 6/15/2023 Subtotal — — — — — — — — — — — —
Daily, — — — — — — — — — — — — — — — — — —
Winter
(Max)
Avoided — — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
Sequest — — — — — — — — — — — — — — — — — —
ered
Subtotal — — — — — — — — — — — — — — — — — —
Remove — — — — — — — — — — — — — — — — — —
d
Subtotal — — — — — — — — — — — — — — — — — -
- - - - - - - - - - - - - - - - - - -
Annual — — — — — — — — — — — — — — — — — —
Avoided — — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
Sequest — — — — — — — — — — — — — — —
ered
Subtotal
Remove
d
Subtotal — — — — — — — — — — — — — — — — — -
- - - - - - - - - - - - - - - - - - -
5. Activity Data
5.9. Operational Mobile Sources
5.9.1. Unmitigated
21 / 32
15223 - Rockwell Yucaipa (Operations) Detailed Report, 6/15/2023 Single Family 1,207 1,213 1,085 434,563 11,668 11,729 10,492 4,200,575 Housing
Parking Lot 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Other Asphalt 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Surfaces
5.10. Operational Area Sources
5.10.1. Hearths
5.10.1.1. Unmitigated
Single Family Housing
Wood Fireplaces
Gas Fireplaces
Propane Fireplaces
Electric Fireplaces
No Fireplaces
5.10.2. Architectural Coatings
564059.7
5.10.3. Landscape Equipment
188,020
Ism
0 115
0 0
13 e ��
21,925
Snow Days
day/yr
22 / 32
M
15223 - Rockwell Yucaipa (Operations) Detailed Report, 6/15/2023 Summer Days day/yr
5.11. Operational Energy Consumption
5.11.1. Unmitigated
Electricity (kWh/yr) and CO2 and CH4 and N20 and Natural Gas (kBTU/yr) Electricity (kWh/yr) M
Single Family Housing 974,032 349 0.0330
Parking Lot 27,818 349 0.0330
Other Asphalt Surfaces 0.00 349 0.0330
5.12. Operational Water and Wastewater Consumption
5.12.1. Unmitigated
Single Family Housing
Parking Lot
Other Asphalt Surfaces
5.13. Operational Waste Generation
5.13.1. Unmitigated
Single Family Housing
Parking Lot
Other Asphalt Surfaces
5,335,190
0.00 0.00
124
0.00 0.00
250
0.0040
0.0040
0.0040
29,426,927
0.00 0.00
4,005,084
0.00 0.00
23 / 32
15223 - Rockwell Yucaipa (Operations) Detailed Report, 6/15/2023
5.14. Operational Refrigeration and Air Conditioning Equipment
5.14.1. Unmitigated
Single Family Housing Average room A/C & User Defined 750 Other residential A/C
and heat pumps
Single Family Housing Household refrigerators R-134a 1,430 and/or freezers
5.15. Operational Off -Road Equipment
5.15.1. Unmitigated
5.16. Stationary Sources
5.16.1. Emergency Generators and Fire Pumps
5.16.2. Process Boilers
5.17. User Defined
< 0.005
2.50 2.50
10.0 0.12
0.60 0.00
1.00 24 / 32
15223 - Rockwell Yucaipa (Operations) Detailed Report, 6/15/2023
5.18. Vegetation
5.18.1. Land Use Change
5.18.1.1. Unmitigated
5.18.1. Biomass Cover Type
5.18.1.1. Unmitigated
Biomass Cover Type Initial Acres Final Acres
5.18.2. Sequestration
5.18.2.1. Unmitigated
6. Climate Risk Detailed Report
6.1. Climate Risk Summary
Cal -Adapt midcentury 2040-2059 average projections for four hazards are reported below for your project location. These are under Representation Concentration Pathway (RCP) 8.5 which assumes GHG emissions will continue to rise strongly through 2050 and then plateau around 2100.
Temperature and Extreme Heat 26.4 annual days of extreme heat Extreme Precipitation 4.05 annual days with precipitation above 20 mm Sea Level Rise 0.00 meters of inundation depth
Wildfire 21.3 annual hectares burned
25 / 32
15223 - Rockwell Yucaipa (Operations) Detailed Report, 6/15/2023 Temperature and Extreme Heat data are for grid cell in which your project are located. The projection is based on the 98th historical percentile of daily maximum/minimum temperatures from observed historical data (32 climate model ensemble from Cal -Adapt, 2040-2059 average under RCP 8.5). Each grid cell is 6 kilometers (km) by 6 km, or 3.7 miles (mi) by 3.7 mi.
Extreme Precipitation data are for the grid cell in which your project are located. The threshold of 20 mm is equivalent to about 1/4 an inch of rain, which would be light to moderate rainfall if received over a full day or heavy rain if received over a period of 2 to 4 hours. Each grid cell is 6 kilometers (km) by 6 km, or 3.7 miles (mi) by 3.7 mi.
Sea Level Rise data are for the grid cell in which your project are located. The projections are from Radke et al. (2017), as reported in Cal -Adapt (2040-2059 average under RCP 8.5), and consider different increments of sea level rise coupled with extreme storm events. Users may select from four model simulations to view the range in potential inundation depth for the grid cell. The four simulations make different assumptions about expected rainfall and temperature are: Warmer/drier (HadGEM2-ES), Cooler/wetter (CNRM-CM5), Average conditions (CanESM2), Range of different rainfall and temperature possibilities (MIR005). Each grid cell is 50 meters (m) by 50 m, or about 164 feet (ft) by 164 ft.
Wildfire data are for the grid cell in which your project are located. The projections are from UC Davis, as reported in Cal -Adapt (2040-2059 average under RCP 8.5), and consider historical data of climate, vegetation, population density, and large (> 400 ha) fire history. Users may select from four model simulations to view the range in potential wildfire probabilities for the grid cell. The four simulations make different assumptions about expected rainfall and temperature are: Warmer/drier (HadGEM2-ES), Cooler/wetter (CNRM-CM5), Average conditions (CanESM2), Range of different rainfall and temperature possibilities (MIR005). Each grid cell is 6 kilometers (km) by 6 km, or 3.7 miles (mi) by 3.7 mi.
6.2. Initial Climate Risk Scores
Temperature and Extreme Heat
3 0
0 N/A
Extreme Precipitation
N/A
N/A
N/A
N/A
Sea Level Rise
1 0
0 N/A
Wildfire
1 0
0 N/A
Flooding
N/A
N/A
N/A
N/A
Drought
N/A
N/A
N/A
N/A
Snowpack Reduction
N/A
N/A
N/A
N/A
Air Quality Degradation
0 0
0 N/A
The sensitivity score reflects the extent to which a project would be adversely affected by exposure to a climate hazard. Exposure is rated on a scale of 1 to 5, with a score of 5 representing the greatest exposure.
The adaptive capacity of a project refers to its ability to manage and reduce vulnerabilities from projected climate hazards. Adaptive capacity is rated on a scale of 1 to 5, with a score of 5 representing the greatest ability to adapt.
The overall vulnerability scores are calculated based on the potential impacts and adaptive capacity assessments for each hazard. Scores do not include implementation of climate risk reduction measures.
6.3. Adjusted Climate Risk Scores
Temperature and Extreme Heat
Extreme Precipitation
N/A
N/A
N/A
N/A
26 / 32
15223 - Rockwell Yucaipa (Operations) Detailed Report, 6/15/2023 Sea Level Rise
1 1
1 2
Wildfire
1 1
1 2
Flooding
N/A
N/A
N/A
N/A
Drought
N/A
N/A
N/A
N/A
Snowpack Reduction
N/A
N/A
N/A
N/A
Air Quality Degradation
1 1
1 2
The sensitivity score reflects the extent to which a project would be adversely affected by exposure to a climate hazard. Exposure is rated on a scale of 1 to 5, with a score of 5 representing the greatest exposure.
The adaptive capacity of a project refers to its ability to manage and reduce vulnerabilities from projected climate hazards. Adaptive capacity is rated on a scale of 1 to 5, with a score of 5 representing the greatest ability to adapt.
The overall vulnerability scores are calculated based on the potential impacts and adaptive capacity assessments for each hazard. Scores include implementation of climate risk reduction measures.
6.4. Climate Risk Reduction Measures
7. Health and Equity Details
7.1. CalEnviroScreen 4.0 Scores
The maximum CalEnviroScreen score is 100. A high score (i.e., greater than 50) reflects a higher pollution burden compared to other census tracts in the state.
Exposure Indicators
AQ-Ozone
100
AQ-PM
52.8 AQ-DPM
81.7 Drinking Water
44.3 Lead Risk Housing
73.7 Pesticides
17.7 Toxic Releases
42.3 Traffic
60.0 Effect Indicators
—
27 / 32
15223 - Rockwell Yucaipa (Operations) Detailed Report, 6/15/2023 CleanUp Sites
Groundwater
Haz Waste Facilities/Generators
Impaired Water Bodies
Solid Waste
Sensitive Population
Asthma
Cardio-vascular
Low Birth Weights
Socioeconomic Factor Indicators
Education
Housing
Linguistic
Poverty
Unemployment
7.2. Healthy Places Index Scores
The maximum Health Places Index score is 100. A
Economic
Above Poverty
Employed
Median HI
Education
Bachelor's or higher
High school enrollment
Preschool enrollment
53.4 59.6
75.8 0.00
0.00 39.3
73.6 19.6
54.6 76.0
7.38 60.8
51.3 score (i.e., greater than 50) reflects healthier community conditions
22.6356987
16.72013345
24.76581548
29.77030669
100
14.08956756
to other census tracts in the state.
28 / 32
15223 - Rockwell Yucaipa (Operations) Detailed Report, 6/15/2023 Transportation
Auto Access
27.10124471
Active commuting
35.09559861
Social
—
2-parent households
28.53843193
Voting
36.75093032
Neighborhood
—
Alcohol availability
57.82112152
Park access
2.194276915
Retail density
23.09765174
Supermarket access
23.70075709
Tree canopy
8.250994482
Housing
—
Homeownership
34.58231746
Housing habitability
17.75952778
Low-inc homeowner severe housing cost burden
47.22186578
Low-inc renter severe housing cost burden
27.97382266
Uncrowded housing
45.28422944
Health Outcomes
—
Insured adults
40.74169126
Arthritis
0.0 Asthma ER Admissions
55.2 High Blood Pressure
0.0 Cancer (excluding skin)
0.0 Asthma
0.0 Coronary Heart Disease
0.0 Chronic Obstructive Pulmonary Disease
0.0 29 / 32
15223 - Rockwell Yucaipa (Operations) Detailed Report, 6/15/2023 Diagnosed Diabetes
0.0 Life Expectancy at Birth
24.5 Cognitively Disabled
2.3 Physically Disabled
3.2 Heart Attack ER Admissions
16.5 Mental Health Not Good
0.0 Chronic Kidney Disease
0.0 Obesity
0.0 Pedestrian Injuries
51.5 Physical Health Not Good
0.0 Stroke
0.0 Health Risk Behaviors
—
Binge Drinking
0.0 Current Smoker
0.0 No Leisure Time for Physical Activity
0.0 Climate Change Exposures
—
Wildfire Risk
1.1 SLR Inundation Area
0.0 Children
24.2 Elderly
45.2 English Speaking
62.1 Foreign -born
14.1 Outdoor Workers
39.5 Climate Change Adaptive Capacity
—
Impervious Surface Cover
88.7 Traffic Density
69.9 Traffic Access
23.0 30 / 32
15223 - Rockwell Yucaipa (Operations) Detailed Report, 6/15/2023 Other Indices —
Hardship 65.5
Other Decision Support —
2016 Voting 56.5
7.3. Overall Health & Equity Scores
CalEnviroScreen 4.0 Score for Project Location (a) 61.0 Healthy Places Index Score for Project Location (b) 16.0 Project Located in a Designated Disadvantaged Community (Senate Bill 535) No Project Located in a Low -Income Community (Assembly Bill 1550) Yes Project Located in a Community Air Protection Program Community (Assembly Bill 617) No a: The maximum CalEnviroScreen score is 100. A high score (i.e., greater than 50) reflects a higher pollution burden compared to other census tracts in the state. b: The maximum Health Places Index score is 100. A high score (i.e., greater than 50) reflects healthier community conditions compared to other census tracts in the state.
7.4. Health & Equity Measures
No Health & Equity Measures selected.
7.5. Evaluation Scorecard
Health & Equity Evaluation Scorecard not completed.
7.6. Health & Equity Custom Measures
No Health & Equity Custom Measures created.
8. User Changes to Default Data
Land Use
Operations: Vehicle Data
Data taken from site plan
Trip characteristics based on information provided in the traffic analysis Operations: Hearths
SCAQMD Rule 445 no wood burning devices. Wood burning devices added to gas devices. 31 / 32
15223 - Rockwell Yucaipa (Operations) Detailed Report, 6/15/2023 Operations: Architectural Coatings
Operations: Refrigerants
SCAQMD Rule 1113
Beginning 1 January 2025, all new air conditioning equipment may not use refrigerants with a GWP of 750 or greater.
32 / 32
Rockwell Technical Studies Greenhouse Gas Analysis
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15223-03 GHG Report
Lv► URBAN
Appendix G
Preliminary Hydrology Study TR 20372 Residential
Development
"�- City of Yucaipa
Starling Heights SP TTM 20372
Initial Study/Mitigated Negative Declaration
April 2024
Page118
PRELIMINARY HYDROLOGY STUDY
PREPARE FOR:
Premium Land Development, LLC
Craig Heap
35109 Avenue C
Yucaipa, CA 92399
FOR THE PROJECT:
TR 20372 Residential Development
YUCAIPA, CA
PREPARED BY:
A&irre, Consulting,, Inc.
BLUE ENGINEERING AND CONSULTING, INC
RANCHO CUCAMONGA, CA 91739
(909) 248-6557
PREPARED UNDER THE SUPERVISION OF:
ANGEL CESAR, RCE 87222
November 2020
INDEX:
INDEX............................................................................................................................................................ 1 VICINITYMAP................................................................................................................................................ 2 PROJECT DESCRIPTION/METHODOLOGY...................................................................................................... 3 HYDROLOGYSTUDY...................................................................................................................................... 4 APPENDIX...................................................................................................................................................... 5 HYDROLOGYMAP......................................................................................................................................... 6 • Pre -Development Exhibit
• Post Development Exhibit
HydrologyCalculations................................................................................................................................. 7 CIVILCADD/CIVILDESIGN Rational Method Calculations
Pre -Development 2 yr
Pre -Development 10 yr
Pre -Development 100 yr
Post -Development 2 yr
Post -Development 10 yr
Post Development 100 yr
CIVILCADD/CIVILDESIGN Unit Hydrograph Analysis
Post - Development 2 yr. — DA 1
Post - Development 10 yr. — DA 1
Post — Development 100 yr. — DA 1
Post - Development 2 yr. — DA 2
Post - Development 10 yr. — DA 2
Post — Development 100 yr. — DA 2
CIVILCADD/CIVILDESIGN Flood Hydrograph Routing Program
Post — Development 2 yr. — DA 1
Post - Development 10 yr. — DA 1
Post — Development 100 yr. — DA 1
Post — Development 2 yr. — DA 2
Post - Development 10 yr. — DA 2
Post — Development 100 yr. — DA 2
1 1 P a g e
AVE. D
PROJECT LOCATION
AVE. E
� � f
cn cn v�
KENTUCKY' N
ST
Cam'
OPT
10 VICINITY MAP
N.T.S.
2 1 P a g e
INTRODUCTION
Tract Map 20372 is a residential project that contains 128 single family lots and is approximately 14.8 acres site located on the north side of Avenue E in the City of Yucaipa, Los Angeles County, California (see attached vicinity map). The site is bordered to the west by Oak Glen Creek, to the north by single family homes located on large lots, to the south by Avenue E and by 12th Street to the east.
DESCRIPTION OF THE ONSITE CONDITIONS
The subject site consists of an almost rectangle shaped parcel, approximately 14.8 acres in size. The site is currently undeveloped and appears to have been graded in the past. Ground surface cover consists of exposed soil.
The site topography appears to have a low spot at the southwest of the property. There is an estimated 41 foot of elevation differential across the site. The existing flows drains into the intersection of Avenue E and 12th St. Drainage continues south along 12th Street and eventually it enters Oak Glen Creek.
The site will be developed with 128 single family lots. The site will contain 2 letter lots that will contain infiltration basin. The site will be split into two drainage areas. The northerly part of the site will drain into Lot A to allow for infiltration. The southerly part of the site will drain into Lot B to allow for infiltration.
III. OFFSITE HYDROLOGY
The highest part of the site is at the northeast corner of the site. Along the northerly property line, drainage appears to flow east to west along the northerly property line. Along the easterly property line drainage appears to flow north to south with some nuisance flow draining into the project site. The southerly property line borders Avenue E and drains east to west. The westerly property line borders with 121h Street and carries drainage north to south.
IV. ONSITE HYDROLOGY
The project is proposed to use two infiltration basins that will be located at on Lot A and Lot B, to mitigate added flows generated by the additional impervious surface. The project will use minimal inlets and storm drainpipes where needed to direct the flow to the basin.
Hydrologic calculations for the project were performed using CIVILCADD/CIVIL DESIGN Engineering Software, Version 7.1. Peak Flow and Time of Concentration values for each storm event were obtained for the pre -developed and post -developed condition using the "San Bernardino County Rational Hydrology Program option within the software.
The run-off index, time of concentration, previous fraction and other pertinent information obtained from the rational analysis was then used to generate a post -development Unit Hydrograph for each respective drainage area, as applicable. This was done to compare the existing and proposed condition hydrology mitigation requirements for the 2-year 24-hour and 100-year 24-hour design storms. The Unit 3 1 P a g e
Hydrograph Analysis was performed using the CIVILCADD/CIVILDESIGN Engineering Software previously mentioned.
As appropriate, the resulting Unit Hydrograph was then imported into the CIVILCADD/CIVIL DESIGN Routing Software to perform basin routing and outflow analysis of each detention basin. The final outflow rate from both basins was then compared to the existing condition rational method calculation for the 100-year storm event to ensure the project complies with the mitigation requirements for the project.
Design Parameters
o The drainage area is in Soil Group A according to the USA NRCS Soil Survey. o Antecedent Moisture Content (AMC) of I was used for 2-year, II was used for 10-year and III was used for 100-year return frequency storm calculation.
o The onsite drainage area was analyzed for a 2-year, 10-year and 100-year storm event using Rational Method Analysis per San Bernardino County Hydrology Manual and CIVILCADD/CIVILDESIGN.
o The drainage area is located within a valley area and is assumed to have an Intensity -Duration slope of 0.60 according to section B.8 of the Hydrology Manual. o The rainfall depth of a 2-year 1-hour storm event is 0.528 inches according to NOAA Atlas 14 Precipitation Frequency Estimates.
o The rainfall depth of a 10-year 1-hour storm event is 0.828 inches according to NOAA Atlas 14 Precipitation Frequency Estimates
o The rainfall depth of a 100-year 1-hour storm event is 1.36 inches according to NOAA Atlas 14 Point Precipitation Frequency Estimates.
o The impervious are is assumed to be 60% of the total onsite area, representative of a site with an Apartment subarea type.
o All flows are based on the completed development of the land for the proposed site plan. o The drainage areas for the proposed development were determined based on probable land flow areas.
Table 1.1 San Bernardino County Rational Hydrology
Pre -Development
Calculations
Post -Development Calculations (Pre -mitigation)
Drainage
area
Area
(ac)
Frequency
Q (cfs)
Drainage
area
Area
(ac)
Frequency
Q (cfs)
DA-1
9.26 2 yr
1.353
DA-1
2.60 2 yr
2.080
10 yr
10.341
10 yr
4.559
100 yr
22.485
100 yr
8.256
DA-2
5.54 2 yr
1.079
DA-2
3.12 2 yr
2.479
10 yr
6.677
10 yr
5.441
100 yr
14.257
100 yr
9.859
DA-3
2.09 2 yr
1.828
4 1 P a g e
10 yr
3.947
100 yr
7.101
DA-4
6.99 2 yr
4.950
10 yr
11.092
100 yr
20.285
Table 1.2 summaries the unit hydrographs that were conducted for the 2-yr, 10-yr, and the 100-yr return. These two hydrographs were used to show routing through the basins for Table 1.2 San Bernardino County Unit Hydrograph and Basin Routing Post -Development Unit Hydrograph
Post -Development Unit Hydrograph
Drainage
area
Area
(ac)
Q (cfs)
Drain
age
area
Area
(ac)
Q
(cfs)
DA-1
7.81 2 yr
2.43 DA-1
7.81 2 yr
6.34 10 yr
7.93 10 yr
12.80 100 yr
17.22 100 yr
23.08 DA-2
6.99 2 yr
2.33 DA-2
6.99 2 yr
5.65 10 yr
7.42 10 yr
11.40 100 yr
15.98 100 yr
20.57 Table 1.3 Basin Volumes
Basin A
Elevation
Volume
(ac.-ft)
Outfall (cfs)
2102.00
0 0
2105.00
0.0558
0.0759
2106.00
0.0698
0.0759
2107.00
0.1270
0.0759
2108.00
0.2074
0.0759
2108.17
0.2254
0.8209
2108.33
0.2434
2.1939
2109.00
0.3143
2.1939
2110.00
0.4479
2.1939
2110.17
0.4757
4.4379
2110.33
0.5035
8.8849
2111.00
0.6131
17.0000
Basin B
Elevation
Volume
(ac.-ft)
Outfall
(cfs)
2116.00
0 0
2119.00
0.0495
0.0672
2120.00
0.0618
0.0672
2121.00
0.1151
0.0672
2122.00
0.1939
0.0672
2122.17
0.2120
0.8122
2122.33
0.2301
2.1852
2123.00
0.3016
2.1852
2124.00
0.4385
2.1852
2124.17
0.4673
4.4292
2124.33
0.4961
8.8762
2125.00
0.6096
15.0000
5 1 P a g e
Table 1.4 Conclusion
Basin Routing Comparison Table DA-1
Event
Pre
Post Mitigated
Decrease
% Change
2 yr
2.43 2.194
0.236
-9.71%
10 yr
7.93 2.194
5.736
-72.33
100 yr
17.22 15.175
2.045
-11.88%
Basin Routing Comparison Table DA-2
Event
Pre
Post Mitigated
Decrease
% Change
2 yr
2.33 2.185
0.145
-6.22%
10 yr
7.42 2.185
5.235
-70.55%
100 yr
15.98 11.812
4.168
-26.08%
V. CONCLUSION
The project will increase the post Q amount. To mitigate the increase of flow coming from the project two infiltration basins are being proposed. The mitigated volume that the proposed infiltration basins will provide is 51,759 cubic feet. After introduction of the basin into the calculations, Q decreases by an average of 8.00% for the 2 year event, 71.44% for the 10 year event and 18.98% for the 100 year event. 6 1 P a g e
HYDROLOGY MAP
Pre -Development Exhibit
Post Development Exhibit
7 1 P a g e
CQNC
GNV
GNV \ GNV
\GNv
,'�� A \ \ V A ; GNV v
8TC \ \ x
\ <J I
L EXIST. DWY GNV \ \ \ \ \ x
IST. DWY = 4' \ ASPH \ \ \ \ \ f2138.2
r' / \ \ \ \ N89°59'38"W 1107.3ODE 101 EG \
727 / \ \ F C�Ft3T:�4T I \*-4 f V �� X
IST. DWY T o _ - �� c, _ F v �N DE 1 3
� � 152.2
�O 7 CL EX�T. DWY \ \
2121.00 S \ \ \ \
IST. DWY �- ,�20o SF�.i 2720,
LL
\ I \
\ \
c� �106
U ❑ I \ \ o
_ DO � \
LLJ
��
IjT.00
00 w�
\ \ \ -
b, \ DMA 1
\ \ \ 9.26
DMA-2 II l
M I \ \ \ \ \ \ I 5.54 �/ -7 / / /
NC PIP 77\ \ \ �
LEGEND
�ov� s S \ \ \ \ \ \ / - DRAINAGE AREA
70.21 DESIGNATION
AREA IN ACRES
WATERSHED BOUNDARY
UBc, � \ \ / �'\ \ \ \ \ \ / --- FLOW PATH
L 100 LENGTH 0 FLOW PAT
" Q100 CALCULATED 100—YEAR STORM RUi'GEE
WM
LLJ
Ll
GNV 1126o�F�1 c� \ \ \ \ I \ L Q4i
� \V\ \ \ \ \ Al ap Aga \
w
NOPE 104
\ \ Q =1. 79 CFS
1 /
Q1o=6.67 CFS v f213
�oo=14.2N CFS
1� L \ \ \ \ \ \ \ \ \ E B OCK WAL 213
NOD 102
) -T75 CFS Aso t21 1 �.1 0 \ \ \ \ \ \ � \ � \ \ \ XN
1 =10.341 CFS \ \ \ \ \ \ �� 2132.6F�
Q oo y 85 CFS `'' �1� _N \ �'�� \ N00°00'25E \ \ \ I 11 \ \ N�00�E 278.88' \
�� 1 4.0\
99 CCN� \�� \ �5� N90'10' E 29.97 I I
AN
co J 77008E /��� l� V D' - s \� �� �G \ 2,�9� `n
d SMH ���C �^ �� ��� �— �J—� J 21 EXIST. HOUSE y(
'VENUE E) % l l / �1 SCALE
6I Iv 4. 0 00ti� — ��'� �6���F 50 0 25 50 100
�sJ �� o � ASI�'� v _ �-- �� 212g. 3F ��� ��,'s� I I / / ( FEET ) s ' A pH Q��� I � — _C �— — �� o I 1 INCH = 50 FT.
GNVco
�� z ° 03' 40 _ 000.\ 6/
'7Io. o� s I -®- G V
S I
NOT FOR CONSTRUCTION, FOR PLAN CHECK ONLY �2 �2 .45FS� ����� c �oN� - �`0�3"W (2j,.44r(, .BENCH MARK TRACT NO. 20372
• NAME: BM XXXXXX RESET 19XX ELEVATION: XXXX.XX' DESIGNED BY: AC SUBMITTED BY: DATE:
DATUM: XXXX XXXX DATUM QROFESS/p�, CITY OF YUCAIPA
DESCRIPTION: XXXX" XXXXXXXXXXXXXXXXXXXXXX Qc�O 9� FORE ER BWE N.G. �� • o �� ��,�. CFS, Fyn � � � RECOMMENDED FOR APPROVAL BY: DATE:
LEGAL DESCRIPTION DRAWN BY: VL q� m ®iibu ing9 ��e RESIDENTIAL HOUSING DEVELOPMENT THE LAND REFERRED TO HEREIN BELOW IS SITUATED IN THE COUNTY OF SAN N0000000 9320 BASELINE RD., STE. D - RANCHO CUCAMONGA, CA 91701 _ ®� �� PMENT HYDROLOGY EXHBTAPPROVED BY: DATE:
BERNARDINO, STATE OF CALIFORNIA, AND DESCRIBED AS FOLLOWS: i� it [email protected] - WWW.BLUECIVILENG.COM PRLFERMIN G. PRECIADO CITY ENGINEER PER PLAT RECORDED IN BOOK 0318 OF MAPS, PAGE 02 RECORDS OF SAN BERNARDINO sj C/V\\- 909-248-6557 JOB No. DRAWING No.
Know what's below. APNN 31LOT 2 66,687_1N�D 68_OFF SUBDIVISION DUNLAB RANCH SUBDIVISION NO 2. CHECKED BY: AC 9T`c CF CAL�F�8 � � 52648 12TH & AVENUE E SHEET No. OF —I—__ SHEETS
Call before you dig. PLANS PREPARED UNDER THE SUPERVISION OF: DATE REV. REVISION DESCRIPTION BY DATE APN: 0318-021 —1 8,19, &-58 CITY OF YUCAIPA PUBLIC WORKS DEPARTMENT ANGEL CESAR P.E. 87222 ENGINEERING DIVISION
CIN
GNV +o \
22 F�� GNV 1 �s
�2772; A \ I NV 2 v(h x
7L EXIST. DWY \
xIST. DWY �� - 4' ASPH \ J\ 2138.83FS \ \ \
14') / -- — nl NODE 201 \
+- \ \ N89'59'38"W 1107.30' X X \ c� X X
—� -_
=xlsT. DWY ?7 7 ��� �, _ - — F 'NQ E 205 -
_ x �2121
�i��_A _ OF - \ ��, ��� �� �_ 52. EG
J f
71 Q
6 ] 7
{
-
=XIST. DWY �I Q B B C; \ \ B
J V
�.
) Q
GNIvIx—�� z DMA-1 = \
2.60 � �
§B I
Q \ e
1_�/
y,c \ a \
'I
o�2 19.53E
Bcn
- I
X I �o.
`+
a
Lily
tB
ll
GNV
- - - °J \-"J ° �j BASIN TOP WIDTH
NODE 208 \
Q2=1.828 CFS 2111.54E o \ e
VARIES
Q10=3.947 CFS \ \ ��� 0'0 5"E 5) ��� 0- - B 63
�
0100=7.101 CFS ✓' ° \ \ \ B 2 00
�i90 od"E 27 �� 1 .0(J� I �a.1
4•
CO O �99 N90 .97
/ / ENGINEERED.
Exls . Hous \ SOIL MEDIA
161 v) 00 00 �� \ ��° �v \ - ��, 7 �6 A r _ . �� =� AASHTO #57 21088oF�\�� \ .��9 '� �� �� + / STONE BASIN BOTTOM WIDTH �- �s �, VARIES
��` z ti q PH ���� �, I ;�� �� o A� I ��� TYPICAL INFILTRATION BASIN DETAIL z`03• � \ NODE 206 N o l �° �� 1
GNV �� CFS °p ��o.os. Q2-4.950 CFS �_ "� + �� tiI J1 F, I I SCALE. 1 =10 Q10 11.092 CFS + G V
��tio \�-20.285 CFS-°j, 5„ /0 ---- — --' �i
Q100= \ �2?
_1\
F 2130.88 0-0�.
NOT FOR CONSTRUCTION, FOR PLAN CHECK ONLY �y _` (2 , or S �� � co �� 3"W � � j, „-,-I- n
BENCH MARK TRACT NO. 20372
• NAME: BM XXXXXX RESET 19XX ELEVATION: XXXX.XX' DESIGNED BY: AC\� QROFESS/p�SUBMITTED BY: DATE:
DATUM: XXXX XXXX DATUM , CITY OF YUCAIPA
DESCRIPTION: XXXX" XXXXXXXXXXXXXXXXXXXXXX Qc�O 9� FOREVER BWE N.G. • o �� ��,�. CFS, Fyn � � � RECOMMENDED FOR APPROVAL BY: DATE:
LEGAL DESCRIPTION DRAWN BY: VL q� m �otibu ing9 ��� RESIDENTIAL HOUSING DEVELOPMENT THE LAND REFERRED TO HEREIN BELOW IS SITUATED IN THE COUNTY OF SAN z N0000000 9320 BASELINE RD., STE. D - RANCHO CUCAMONGA, CA 91701 pJ APPROVED BY: DATE:
POST— DEVELOPMENT
� \ HYDROLOGY H
BERNARDINO, STATE OF CALIFORNIA, AND DESCRIBED AS FOLLOWS: i� it [email protected] - WWW.BLUECIVILENG.COM FERMIN G. PRECIADO CITY ENGINEER PER PLAT RECORDED IN BOOK 0318 OF MAPS, PAGE 02 RECORDS OF SAN BERNARDINO sj C/V\\- 909-248-6557 JOB No. DRAWING No.
Know what's below. APNN 31LOT 2 66,687_AN�D 68_OFF SUBDIVISION DUNLAB RANCH SUBDIVISION NO 2. CHECKED BY: AC 9T`c OF CA�1``a__ 11 52648 12TH & AVENUE E SHEET No. - ---I- OF SHEETS
Call before you dig. PLANS PREPARED UNDER THE SUPERVISION OF' DATE REV. REVISION DESCRIPTION BY DATE APN: 0318-021 -1 8,19, &-58 CITY OF YUCAIPA PUBLIC WORKS DEPARTMENT ANGEL CESAR P.E. 87222 1 1 ENGINEERING DIVISION
Hydrology Calculations
CIVILCADD/CIVILDESIGN Rational Method Calculations
Pre -Development 2 yr
Pre -Development 10 yr
Pre -Development 100 yr
Post -Development 2 yr
Post -Development 10 yr
Post Development 100 yr
CIVILCADD/CIVILDESIGN Unit Hydrograph Analysis
Post - Development 2 yr.- DA 1
Post - Development 10 yr. - DA 1
Post — Development 100 yr. - DA 1
Post - Development 2 yr.- DA 2
Post - Development 10 yr. - DA 2
Post — Development 100 yr. - DA 2
CIVILCADD/CIVILDESIGN Flood Hydrograph Routing Program
Post - Development 2 yr.- DA 1
Post - Development 10 yr. - DA 1
Post — Development 100 yr. - DA 1
Post - Development 2 yr.- DA 2
Post - Development 10 yr. - DA 2
Post — Development 100 yr. - DA 2
8 1 P a g e
San Bernardino County Rational Hydrology Program
(Hydrology Manual Date - August 1986)
CIVILCADD/CIVILDESIGN Engineering Software, (c) 1989-2019 Version 9.1 Rational Hydrology Study Date: 08/22/22
------------------------------------------------------------------------ TTM 20372
Pre Development Rational
2 yr
Program License Serial Number 6481
------------------------------------------------------------------------ ********* Hydrology Study Control Information ********** ------------------------------------------------------------------------ Rational hydrology study storm event year is 2.0
10 Year storm 1 hour rainfall = 0.828(In.)
100 Year storm 1 hour rainfall = 1.360(In.)
Computed rainfall intensity:
Storm year = 2.00 1 hour rainfall = 0.456 (In.)
Slope used for rainfall intensity curve b = 0.6000
Soil antecedent moisture condition (AMC) = 1
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 101.000 to Point/Station 102.000 **** INITIAL AREA EVALUATION ****
UNDEVELOPED (poor cover) subarea
Decimal fraction soil group A = 1.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 0.000
Decimal fraction soil group D = 0.000
SCS curve number for soil(AMC 2) = 67.00
Adjusted SCS curve number for AMC 1 = 47.40
Pervious ratio(Ap) = 1.0000 Max loss rate(Fm)= 0.840(In/Hr) Initial subarea data:
Initial area flow distance = 896.690(Ft.)
Top (of initial area) elevation = 2138.100(Ft.)
Bottom (of initial area) elevation = 2112.000(Ft.)
Difference in elevation = 26.100(Ft.)
Slope = 0.02911 s(%)= 2.91
TC = k(0.525)*[(lengthA3)/(elevation change) ]^0.2
Initial area time of concentration = 16.159 min.
Rainfall intensity = 1.002(In/Hr) for a 2.0 year storm
Effective runoff coefficient used for area (Q=KCIA) is C = 0.146 Subarea runoff = 1.353(CFS)
Total initial stream area = 9.260(Ac.)
Pervious area fraction = 1.000
Initial area Fm value = 0.840(In/Hr)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 103.000 to Point/Station 104.000 **** INITIAL AREA EVALUATION ****
UNDEVELOPED (poor cover) subarea
Decimal fraction soil group A = 1.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 0.000
Decimal fraction soil group D = 0.000
SCS curve number for soil(AMC 2) = 67.00
Adjusted SCS curve number for AMC 1 = 47.40
Pervious ratio(Ap) = 1.0000 Max loss rate(Fm)= 0.840(In/Hr) Initial subarea data:
Initial area flow distance = 732.950(Ft.)
Top (of initial area) elevation = 2152.200(Ft.)
Bottom (of initial area) elevation = 2130.100(Ft.)
Difference in elevation = 22.100(Ft.)
Slope = 0.03015 s(%)= 3.02
TC = k(0.525)*[(lengthA3)/(elevation change) ]^0.2
Initial area time of concentration = 14.802 min.
Rainfall intensity = 1.056(In/Hr) for a 2.0 year storm
Effective runoff coefficient used for area (Q=KCIA) is C = 0.184 Subarea runoff = 1.079(CFS)
Total initial stream area = 5.540(Ac.)
Pervious area fraction = 1.000
Initial area Fm value = 0.840(In/Hr)
End of computations, Total Study Area = 14.80 (Ac.)
The following figures may
be used for a unit hydrograph study of the same area.
Note: These figures do not consider reduced effective area effects caused by confluences in the rational equation.
Area averaged pervious area fraction(Ap) = 1.000
Area averaged SCS curve number = 67.0
San Bernardino County Rational Hydrology Program
(Hydrology Manual Date - August 1986)
CIVILCADD/CIVILDESIGN Engineering Software, (c) 1989-2019 Version 9.1 Rational Hydrology Study Date: 08/22/22
------------------------------------------------------------------------ TTM 20372
Pre Development Rational
10 yr
Program License Serial Number 6481
------------------------------------------------------------------------ ********* Hydrology Study Control Information ********** ------------------------------------------------------------------------ Rational hydrology study storm event year is 10.0
Computed rainfall intensity:
Storm year = 10.00 1 hour rainfall = 0.828 (In.)
Slope used for rainfall intensity curve b = 0.6000
Soil antecedent moisture condition (AMC) = 2
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 101.000 to Point/Station 102.000 **** INITIAL AREA EVALUATION ****
UNDEVELOPED (poor cover) subarea
Decimal fraction soil group A = 1.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 0.000
Decimal fraction soil group D = 0.000
SCS curve number for soil(AMC 2) = 67.00
Pervious ratio(Ap) = 1.0000 Max loss rate(Fm)= 0.578(In/Hr) Initial subarea data:
Initial area flow distance = 896.690(Ft.)
Top (of initial area) elevation = 2138.100(Ft.)
Bottom (of initial area) elevation = 2112.000(Ft.)
Difference in elevation = 26.100(Ft.)
Slope = 0.02911 s(%)= 2.91
TC = k(0.525)*[(lengthA3)/(elevation change) ]^0.2
Initial area time of concentration = 16.159 min.
Rainfall intensity = 1.819(In/Hr) for a 10.0 year storm Effective runoff coefficient used for area (Q=KCIA) is C = 0.614
Subarea runoff = 10.341(CFS)
Total initial stream area = 9.260(Ac.)
Pervious area fraction = 1.000
Initial area Fm value = 0.578(In/Hr)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 103.000 to Point/Station 104.000 **** INITIAL AREA EVALUATION ****
UNDEVELOPED (poor cover) subarea
Decimal fraction soil group A = 1.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 0.000
Decimal fraction soil group D = 0.000
SCS curve number for soil(AMC 2) = 67.00
Pervious ratio(Ap) = 1.0000 Max loss rate(Fm)= 0.578(In/Hr) Initial subarea data:
Initial area flow distance = 732.950(Ft.)
Top (of initial area) elevation = 2152.200(Ft.)
Bottom (of initial area) elevation = 2130.100(Ft.)
Difference in elevation = 22.100(Ft.)
Slope = 0.03015 s(%)= 3.02
TC = k(0.525)*[(lengthA3)/(elevation change) ]^0.2
Initial area time of concentration = 14.802 min.
Rainfall intensity = 1.917(In/Hr) for a 10.0 year storm Effective runoff coefficient used for area (Q=KCIA) is C = 0.629 Subarea runoff = 6.677(CFS)
Total initial stream area = 5.540(Ac.)
Pervious area fraction = 1.000
Initial area Fm value = 0.578(In/Hr)
End of computations, Total Study Area = 14.80 (Ac.)
The following figures may
be used for a unit hydrograph study of the same area.
Note: These figures do not consider reduced effective area effects caused by confluences in the rational equation.
Area averaged pervious area fraction(Ap) = 1.000
Area averaged SCS curve number = 67.0
San Bernardino County Rational Hydrology Program
(Hydrology Manual Date - August 1986)
CIVILCADD/CIVILDESIGN Engineering Software, (c) 1989-2019 Version 9.1 Rational Hydrology Study Date: 08/22/22
------------------------------------------------------------------------ TTM 20372
Pre Development Rational
100 yr
Program License Serial Number 6481
------------------------------------------------------------------------ ********* Hydrology Study Control Information ********** ------------------------------------------------------------------------ Rational hydrology study storm event year is 100.0
10 Year storm 1 hour rainfall = 0.828(In.)
100 Year storm 1 hour rainfall = 1.360(In.)
Computed rainfall intensity:
Storm year = 100.00 1 hour rainfall = 1.360 (In.)
Slope used for rainfall intensity curve b = 0.6000
Soil antecedent moisture condition (AMC) = 3
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 101.000 to Point/Station 102.000 **** INITIAL AREA EVALUATION ****
UNDEVELOPED (poor cover) subarea
Decimal fraction soil group A = 1.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 0.000
Decimal fraction soil group D = 0.000
SCS curve number for soil(AMC 2) = 67.00
Adjusted SCS curve number for AMC 3 = 84.60
Pervious ratio(Ap) = 1.0000 Max loss rate(Fm)= 0.290(In/Hr) Initial subarea data:
Initial area flow distance = 896.690(Ft.)
Top (of initial area) elevation = 2138.100(Ft.)
Bottom (of initial area) elevation = 2112.000(Ft.)
Difference in elevation = 26.100(Ft.)
Slope = 0.02911 s(%)= 2.91
TC = k(0.525)*[(lengthA3)/(elevation change) ]^0.2
Initial area time of concentration = 16.159 min.
Rainfall intensity = 2.988(In/Hr) for a 100.0 year storm Effective runoff coefficient used for area (Q=KCIA) is C = 0.813 Subarea runoff = 22.485(CFS)
Total initial stream area = 9.260(Ac.)
Pervious area fraction = 1.000
Initial area Fm value = 0.290(In/Hr)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 103.000 to Point/Station 104.000 **** INITIAL AREA EVALUATION ****
UNDEVELOPED (poor cover) subarea
Decimal fraction soil group A = 1.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 0.000
Decimal fraction soil group D = 0.000
SCS curve number for soil(AMC 2) = 67.00
Adjusted SCS curve number for AMC 3 = 84.60
Pervious ratio(Ap) = 1.0000 Max loss rate(Fm)= 0.290(In/Hr) Initial subarea data:
Initial area flow distance = 732.950(Ft.)
Top (of initial area) elevation = 2152.200(Ft.)
Bottom (of initial area) elevation = 2130.100(Ft.)
Difference in elevation = 22.100(Ft.)
Slope = 0.03015 s(%)= 3.02
TC = k(0.525)*[(lengthA3)/(elevation change) ]^0.2
Initial area time of concentration = 14.802 min.
Rainfall intensity = 3.149(In/Hr) for a 100.0 year storm Effective runoff coefficient used for area (Q=KCIA) is C = 0.817 Subarea runoff = 14.257(CFS)
Total initial stream area = 5.540(Ac.)
Pervious area fraction = 1.000
Initial area Fm value = 0.290(In/Hr)
End of computations, Total Study Area = 14.80 (Ac.)
The following figures may
be used for a unit hydrograph study of the same area.
Note: These figures do not consider reduced effective area effects caused by confluences in the rational equation.
Area averaged pervious area fraction(Ap) = 1.000
Area averaged SCS curve number = 67.0
San Bernardino County Rational Hydrology Program
(Hydrology Manual Date - August 1986)
CIVILCADD/CIVILDESIGN Engineering Software, (c) 1989-2019 Version 9.1 Rational Hydrology Study Date: 08/23/22
------------------------------------------------------------------------ TTM 20372
Post Development rational
2 yr
Program License Serial Number 6481
------------------------------------------------------------------------ ********* Hydrology Study Control Information ********** ------------------------------------------------------------------------ Rational hydrology study storm event year is 2.0
10 Year storm 1 hour rainfall = 0.828(In.)
100 Year storm 1 hour rainfall = 1.360(In.)
Computed rainfall intensity:
Storm year = 2.00 1 hour rainfall = 0.456 (In.)
Slope used for rainfall intensity curve b = 0.6000
Soil antecedent moisture condition (AMC) = 1
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 201.000 to Point/Station 202.000 **** INITIAL AREA EVALUATION ****
RESIDENTIAL(8 - 10 dwl/acre)
Decimal fraction soil group A = 1.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 0.000
Decimal fraction soil group D = 0.000
SCS curve number for soil(AMC 2) = 32.00
Adjusted SCS curve number for AMC 1 = 16.60
Pervious ratio(Ap) = 0.4000 Max loss rate(Fm)= 0.400(In/Hr) Initial subarea data:
Initial area flow distance = 675.730(Ft.)
Top (of initial area) elevation = 2138.240(Ft.)
Bottom (of initial area) elevation = 2121.580(Ft.)
Difference in elevation = 16.660(Ft.)
Slope = 0.02465 s(%)= 2.47
TC = k(0.374)*[(lengthA3)/(elevation change) ]^0.2
Initial area time of concentration = 10.627 min.
Rainfall intensity = 1.289(In/Hr) for a 2.0 year storm
Effective runoff coefficient used for area (Q=KCIA) is C = 0.621 Subarea runoff = 2.080(CFS)
Total initial stream area = 2.600(Ac.)
Pervious area fraction = 0.400
Initial area Fm value = 0.400(In/Hr)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 202.000 to Point/Station 204.000 **** CONFLUENCE OF MINOR STREAMS ****
Along Main Stream number: 1 in normal stream number 1
Stream flow area = 2.600(Ac.)
Runoff from this stream = 2.080(CFS)
Time of concentration = 10.63 min.
Rainfall intensity = 1.289(In/Hr)
Area averaged loss rate (Fm) = 0.4000(In/Hr)
Area averaged Pervious ratio (Ap) = 0.4000
Summary of stream data:
Stream Flow rate Area TC Fm Rainfall Intensity
No. (CFS) (Ac.) (min) (In/Hr) (In/Hr)
1 2.08 2.600 10.63 0.400 1.289
Qmax(1) =
Total of 1 streams to confluence:
Flow rates before confluence point:
2.080
Maximum flow rates at
confluence using above data:
2.080
Area of streams before
confluence:
2.600
Effective area values
after confluence:
2.600
Results of confluence:
Total flow rate =
2.080(CFS)
Time of concentration
= 10.627 min.
Effective stream area
after confluence =
2.600(Ac.)
Study area average Pervious
fraction(Ap)
= 0.400
Study area average soil
loss rate(Fm) =
0.400(In/Hr)
Study area total (this
main stream) =
2.60(Ac.)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 203.000 to Point/Station 204.000
**** INITIAL AREA EVALUATION ****
RESIDENTIAL(8 - 10 dwl/acre)
Decimal fraction soil group A = 1.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 0.000
Decimal fraction soil group D = 0.000
SCS curve number for soil(AMC 2) = 32.00
Adjusted SCS curve number for AMC 1 = 16.60
Pervious ratio(Ap) = 0.4000 Max loss rate(Fm)= 0.400(In/Hr) Initial subarea data:
Initial area flow distance = 693.510(Ft.)
Top (of initial area) elevation = 2135.780(Ft.)
Bottom (of initial area) elevation = 2118.430(Ft.)
Difference in elevation = 17.350(Ft.)
Slope = 0.02502 s(%)= 2.50
TC = k(0.374)*[(lengthA3)/(elevation change) ]^0.2
Initial area time of concentration = 10.706 min.
Rainfall intensity = 1.283(In/Hr) for a 2.0 year storm
Effective runoff coefficient used for area (Q=KCIA) is C = 0.619 Subarea runoff = 2.479(CFS)
Total initial stream area = 3.120(Ac.)
Pervious area fraction = 0.400
Initial area Fm value = 0.400(In/Hr)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 203.000 to Point/Station 204.000 **** CONFLUENCE OF MINOR STREAMS ****
Along Main Stream number: 1 in normal stream number 2
Stream flow area = 3.120(Ac.)
Runoff from this stream = 2.479(CFS)
Time of concentration = 10.71 min.
Rainfall intensity = 1.283(In/Hr)
Area averaged loss rate (Fm) = 0.4000(In/Hr)
Area averaged Pervious ratio (Ap) = 0.4000
Summary of stream data:
Stream
Flow rate
Area TC
Fm
Rainfall Intensity
No.
(CFS)
(Ac.)
(min)
(In/Hr)
(In/Hr)
1 2.08
2.600
10.63 0.400
1.289
2 2.48
3.120
10.71 0.400
1.283
Qmax(1)
=
1.000
*
1.000 *
2.080) +
1.007
*
0.993 *
2.479) +
= 4.557
Qmax(2)
=
0.994
*
1.000 *
2.080) +
1.000 * 1.000 * 2.479) + = 4.545
Total of 2 streams to confluence:
Flow rates before confluence point:
2.080 2.479
Maximum flow rates at confluence using above data:
4.557 4.545
Area of streams before confluence:
2.600 3.120
Effective area values after confluence:
5.697 5.720
Results of confluence:
Total flow rate = 4.557(CFS)
Time of concentration = 10.627 min.
Effective stream area after confluence =
5.697(Ac.)
Study area average Pervious fraction(Ap)
= 0.400
Study area average soil loss rate(Fm) =
0.400(In/Hr)
Study area total (this main stream) =
5.72(Ac.)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 204.000 to Point/Station 208.000 **** CONFLUENCE OF MAIN STREAMS ****
The following data inside Main Stream is listed:
In Main Stream number: 1
Stream flow area = 5.697(Ac.)
Runoff from this stream = 4.557(CFS)
Time of concentration = 10.63 min.
Rainfall intensity = 1.289(In/Hr)
Area averaged loss rate (Fm) = 0.4000(In/Hr)
Area averaged Pervious ratio (Ap) = 0.4000
Summary of stream data:
Stream Flow rate Area TC Fm Rainfall Intensity
No. (CFS) (Ac.) (min) (In/Hr) (In/Hr)
1 4.56 5.697
Qmax(1) =
10.63 0.400 1.289
1.000 * 1.000 * 4.557) + = 4.557
Total of 1 main streams to confluence:
Flow rates before confluence point:
5.557
Maximum flow rates at confluence using above data:
4.557
Area of streams before confluence:
5.697
Effective area values after confluence:
5.697
Results of confluence:
Total flow rate = 4.557(CFS)
Time of concentration = 10.627 min.
Effective stream area after confluence = 5.697(Ac.)
Study area average Pervious fraction(Ap) = 0.400
Study area average soil loss rate(Fm) = 0.400(In/Hr)
Study area total = 5.70(Ac.)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 205.000 to Point/Station 206.000 **** INITIAL AREA EVALUATION ****
RESIDENTIAL(8 - 10 dwl/acre)
Decimal fraction soil group A = 1.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 0.000
Decimal fraction soil group D = 0.000
SCS curve number for soil(AMC 2) = 32.00
Adjusted SCS curve number for AMC 1 = 16.60
Pervious ratio(Ap) = 0.4000 Max loss rate(Fm)=
Initial subarea data:
Initial area flow distance = 998.840(Ft.)
Top (of initial area) elevation = 2152.290(Ft.)
Bottom (of initial area) elevation = 2125.200(Ft.)
Difference in elevation = 27.090(Ft.)
Slope = 0.02712 s(%)= 2.71
TC = k(0.374)*[(lengthA3)/(elevation change) ]^0.2
Initial area time of concentration = 12.190 min.
Rainfall intensity = 1.187(In/Hr) for a 2.0
Effective runoff coefficient used for area (Q=KCIA)
Subarea runoff = 4.950(CFS)
Total initial stream area = 6.990(Ac.)
Pervious area fraction = 0.400
Initial area Fm value = 0.400(In/Hr)
0.400(In/Hr)
year storm
is C = 0.597
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 207.000 to Point/Station 208.000 **** INITIAL AREA EVALUATION ****
RESIDENTIAL(8 -
Decimal fraction
Decimal fraction
Decimal fraction
Decimal fraction
SCS curve number
10 dwl/acre)
soil group A = 1.000
soil group B = 0.000
soil group C = 0.000
soil group D = 0.000
for soil(AMC 2) = 32.00
Adjusted SCS curve number for AMC 1 = 16.60
Pervious ratio(Ap) = 0.4000 Max loss rate(Fm)= 0.400(In/Hr) Initial subarea data:
Initial area flow distance = 555.640(Ft.)
Top (of initial area) elevation = 2127.110(Ft.)
Bottom (of initial area) elevation = 2111.540(Ft.)
Difference in elevation = 15.570(Ft.)
Slope = 0.02802 s(%)= 2.80
TC = k(0.374)*[(lengthA3)/(elevation change) ]^0.2
Initial area time of concentration = 9.578 min.
Rainfall intensity = 1.372(In/Hr) for a 2.0 year storm
Effective runoff coefficient used for area (Q=KCIA) is C = 0.638 Subarea runoff = 1.828(CFS)
Total initial stream area = 2.090(Ac.)
Pervious area fraction = 0.400
Initial area Fm value = 0.400(In/Hr)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 207.000 to Point/Station 208.000 **** CONFLUENCE OF MAIN STREAMS ****
The following data inside Main Stream is listed:
In Main Stream number: 2
Stream flow area = 2.090(Ac.)
Runoff from this stream = 1.828(CFS)
Time of concentration = 9.58 min.
Rainfall intensity = 1.372(In/Hr)
Area averaged loss rate (Fm) = 0.4000(In/Hr)
Area averaged Pervious ratio (Ap) = 0.4000
Summary of stream data:
Stream
Flow rate
Area TC
Fm
Rainfall Intensity
No.
(CFS)
(Ac.)
(min)
(In/Hr)
(In/Hr)
1 4.56
5.697
10.63 0.400
1.289
2 1.83
2.090
9.58 0.400
1.372
Qmax(1)
=
1.000
*
1.000 *
4.557) +
0.915
*
1.000 *
1.828) +
= 6.228
Qmax(2)
=
1.093
*
0.901 *
4.557) +
1.000
*
1.000 *
1.828) +
= 6.318
Total of 2 main streams to confluence:
Flow rates before confluence point:
5.557 2.828
Maximum flow rates at confluence using above data:
6.228 6.318
Area of streams before confluence:
5.697 2.090
Effective area values after confluence:
7.787 7.225
Results of confluence:
Total flow rate = 6.318(CFS)
Time of concentration = 9.578 min.
Effective stream area after confluence = 7.225(Ac.)
Study area average Pervious fraction(Ap) = 0.400
Study area average soil loss rate(Fm) = 0.400(In/Hr)
Study area total = 7.79(Ac.)
End of computations, Total Study Area = 14.80 (Ac.)
The following figures may
be used for a unit hydrograph study of the same area.
Note: These figures do not consider reduced effective area effects caused by confluences in the rational equation.
Area averaged pervious area fraction(Ap) = 0.400
Area averaged SCS curve number = 32.0
San Bernardino County Rational Hydrology Program
(Hydrology Manual Date - August 1986)
CIVILCADD/CIVILDESIGN Engineering Software, (c) 1989-2019 Version 9.1 Rational Hydrology Study Date: 08/23/22
------------------------------------------------------------------------ TTM 20372
Post Development rational
10 yr
Program License Serial Number 6481
------------------------------------------------------------------------ ********* Hydrology Study Control Information ********** ------------------------------------------------------------------------ Rational hydrology study storm event year is 10.0
Computed rainfall intensity:
Storm year = 10.00 1 hour rainfall = 0.828 (In.)
Slope used for rainfall intensity curve b = 0.6000
Soil antecedent moisture condition (AMC) = 2
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 201.000 to Point/Station 202.000 **** INITIAL AREA EVALUATION ****
RESIDENTIAL(8 - 10 dwl/acre)
Decimal fraction soil group A = 1.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 0.000
Decimal fraction soil group D = 0.000
SCS curve number for soil(AMC 2) = 32.00
Pervious ratio(Ap) = 0.4000 Max loss rate(Fm)= 0.391(In/Hr) Initial subarea data:
Initial area flow distance = 675.730(Ft.)
Top (of initial area) elevation = 2138.240(Ft.)
Bottom (of initial area) elevation = 2121.580(Ft.)
Difference in elevation = 16.660(Ft.)
Slope = 0.02465 s(%)= 2.47
TC = k(0.374)*[(lengthA3)/(elevation change) ]^0.2
Initial area time of concentration = 10.627 min.
Rainfall intensity = 2.339(In/Hr) for a 10.0 year storm Effective runoff coefficient used for area (Q=KCIA) is C = 0.750
Subarea runoff = 4.559(CFS)
Total initial stream area = 2.600(Ac.)
Pervious area fraction = 0.400
Initial area Fm value = 0.391(In/Hr)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 202.000 to Point/Station 204.000 **** CONFLUENCE OF MINOR STREAMS ****
Along Main Stream number: 1 in normal stream number 1
Stream flow area = 2.600(Ac.)
Runoff from this stream = 4.559(CFS)
Time of concentration = 10.63 min.
Rainfall intensity = 2.339(In/Hr)
Area averaged loss rate (Fm) = 0.3911(In/Hr)
Area averaged Pervious ratio (Ap) = 0.4000
Summary of stream data:
Stream Flow rate Area TC Fm Rainfall Intensity
No. (CFS) (Ac.) (min) (In/Hr) (In/Hr)
1 4.56 2.600 10.63 0.391 2.339
Qmax(1) =
1.000 * 1.000 * 4.559) + = 4.559
Total of 1 streams to confluence:
Flow rates before confluence point:
4.559
Maximum flow rates at
confluence using above data:
4.559
Area of streams before
confluence:
2.600
Effective area values
after confluence:
2.600
Results of confluence:
Total flow rate =
4.559(CFS)
Time of concentration
= 10.627 min.
Effective stream area
after confluence =
2.600(Ac.)
Study area average Pervious
fraction(Ap)
= 0.400
Study area average soil
loss rate(Fm) =
0.391(In/Hr)
Study area total (this
main stream) =
2.60(Ac.)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 203.000 to Point/Station 204.000 **** INITIAL AREA EVALUATION ****
RESIDENTIAL(8 - 10 dwl/acre)
Decimal fraction soil group A = 1.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 0.000
Decimal fraction soil group D = 0.000
SCS curve number for soil(AMC 2) = 32.00
Pervious ratio(Ap) = 0.4000 Max loss rate(Fm)= 0.391(In/Hr) Initial subarea data:
Initial area flow distance = 693.510(Ft.)
Top (of initial area) elevation = 2135.780(Ft.)
Bottom (of initial area) elevation = 2118.430(Ft.)
Difference in elevation = 17.350(Ft.)
Slope = 0.02502 s(%)= 2.50
TC = k(0.374)*[(lengthA3)/(elevation change) ]^0.2
Initial area time of concentration = 10.706 min.
Rainfall intensity = 2.329(In/Hr) for a 10.0 year storm Effective runoff coefficient used for area (Q=KCIA) is C = 0.749 Subarea runoff = 5.441(CFS)
Total initial stream area = 3.120(Ac.)
Pervious area fraction = 0.400
Initial area Fm value = 0.391(In/Hr)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 203.000 to Point/Station 204.000 **** CONFLUENCE OF MINOR STREAMS ****
Along Main Stream number: 1 in normal stream number 2
Stream flow area = 3.120(Ac.)
Runoff from this stream = 5.441(CFS)
Time of concentration = 10.71 min.
Rainfall intensity = 2.329(In/Hr)
Area averaged loss rate (Fm) = 0.3911(In/Hr)
Area averaged Pervious ratio (Ap) = 0.4000
Summary of stream data:
Stream
Flow rate
Area TC
Fm
Rainfall Intensity
No.
(CFS)
(Ac.)
(min)
(In/Hr)
(In/Hr)
1 4.56
2.600
10.63 0.391
2.339
2 5.44
3.120
10.71 0.391
2.329
Qmax(1)
=
1.000
*
1.000 *
4.559) +
1.005
*
0.993 *
5.441) +
= 9.988
Qmax(2)
=
0.995
*
1.000 *
4.559) +
1.000
*
1.000 *
5.441) +
= 9.975
Total of 2 streams to confluence:
Flow rates before confluence point:
4.559 5.441
Maximum flow rates at confluence using above data:
9.988 9.975
Area of streams before confluence:
2.600 3.120
Effective area values after confluence:
5.697 5.720
Results of confluence:
Total flow rate = 9.988(CFS)
Time of concentration = 10.627 min.
Effective stream area after confluence =
5.697(Ac.)
Study area average Pervious fraction(Ap)
= 0.400
Study area average soil loss rate(Fm) =
0.391(In/Hr)
Study area total (this main stream) =
5.72(Ac.)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 204.000 to Point/Station 208.000 **** CONFLUENCE OF MAIN STREAMS ****
The following data inside Main Stream is listed:
In Main Stream number: 1
Stream flow area = 5.697(Ac.)
Runoff from this stream = 9.988(CFS)
Time of concentration = 10.63 min.
Rainfall intensity = 2.339(In/Hr)
Area averaged loss rate (Fm) = 0.3911(In/Hr)
Area averaged Pervious ratio (Ap) = 0.4000
Summary of stream data:
Stream Flow rate Area TC Fm Rainfall Intensity
No. (CFS) (Ac.) (min) (In/Hr) (In/Hr)
1 9.99 5.697
Qmax(1) =
10.63 0.391 2.339
1.000 * 1.000 * 9.988) + = 9.988
Total of 1 main streams to confluence:
Flow rates before confluence point:
10.988
Maximum flow rates at confluence using above data:
9.988
Area of streams before confluence:
5.697
Effective area values after confluence:
5.697
Results of confluence:
Total flow rate = 9.988(CFS)
Time of concentration = 10.627 min.
Effective stream area after confluence = 5.697(Ac.)
Study area average Pervious fraction(Ap) = 0.400
Study area average soil loss rate(Fm) = 0.391(In/Hr)
Study area total = 5.70(Ac.)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 205.000 to Point/Station 206.000 **** INITIAL AREA EVALUATION ****
RESIDENTIAL(8 - 10 dwl/acre)
Decimal fraction soil group A = 1.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 0.000
Decimal fraction soil group D = 0.000
SCS curve number for soil(AMC 2) = 32.00
Pervious ratio(Ap) = 0.4000 Max loss rate(Fm)=
Initial subarea data:
Initial area flow distance = 998.840(Ft.)
Top (of initial area) elevation = 2152.290(Ft.)
Bottom (of initial area) elevation = 2125.200(Ft.)
Difference in elevation = 27.090(Ft.)
Slope = 0.02712 s(%)= 2.71
TC = k(0.374)*[(lengthA3)/(elevation change) ]^0.2
Initial area time of concentration = 12.190 min.
Rainfall intensity = 2.154(In/Hr) for a 10.0
Effective runoff coefficient used for area (Q=KCIA)
Subarea runoff = 11.092(CFS)
Total initial stream area = 6.990(Ac.)
Pervious area fraction = 0.400
Initial area Fm value = 0.391(In/Hr)
0.391(In/Hr)
year storm
is C = 0.737
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 207.000 to Point/Station 208.000 **** INITIAL AREA EVALUATION ****
RESIDENTIAL(8 - 10 dwl/acre)
Decimal fraction soil group A = 1.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 0.000
Decimal fraction soil group D = 0.000
SCS curve number for soil(AMC 2) = 32.00
Pervious ratio(Ap) = 0.4000 Max loss rate(Fm)= 0.391(In/Hr) Initial subarea data:
Initial area flow distance = 555.640(Ft.)
Top (of initial area) elevation = 2127.110(Ft.)
Bottom (of initial area) elevation = 2111.540(Ft.)
Difference in elevation = 15.570(Ft.)
Slope = 0.02802 s(%)= 2.80
TC = k(0.374)*[(lengthA3)/(elevation change) ]^0.2
Initial area time of concentration = 9.578 min.
Rainfall intensity = 2.490(In/Hr) for a 10.0 year storm Effective runoff coefficient used for area (Q=KCIA) is C = 0.759 Subarea runoff = 3.947(CFS)
Total initial stream area = 2.090(Ac.)
Pervious area fraction = 0.400
Initial area Fm value = 0.391(In/Hr)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 207.000 to Point/Station 208.000 **** CONFLUENCE OF MAIN STREAMS ****
The following data inside Main Stream is listed:
In Main Stream number: 2
Stream flow area = 2.090(Ac.)
Runoff from this stream = 3.947(CFS)
Time of concentration = 9.58 min.
Rainfall intensity = 2.490(In/Hr)
Area averaged loss rate (Fm) = 0.3911(In/Hr)
Area averaged Pervious ratio (Ap) = 0.4000
Summary of stream data:
Stream
Flow rate
Area TC
Fm
Rainfall Intensity
No.
(CFS)
(Ac.)
(min)
(In/Hr)
(In/Hr)
1 9.99
5.697
10.63 0.391
2.339
2 3.95
2.090
9.58 0.391
2.490
Qmax(1)
=
1.000
*
1.000 *
9.988) +
0.928
*
1.000 *
3.947) +
= 13.653
Qmax(2)
=
1.077
*
0.901 *
9.988) +
1.000
*
1.000 *
3.947) +
= 13.646
Total of 2 main streams to confluence:
Flow rates before confluence point:
10.988 4.947
Maximum flow rates at confluence using above data:
13.653 13.646
Area of streams before confluence:
5.697 2.090
Effective area values after confluence:
7.787 7.225
Results of confluence:
Total flow rate = 13.653(CFS)
Time of concentration = 10.627 min.
Effective stream area after confluence = 7.787(Ac.)
Study area average Pervious fraction(Ap) = 0.400
Study area average soil loss rate(Fm) = 0.391(In/Hr)
Study area total = 7.79(Ac.)
End of computations, Total Study Area = 14.80 (Ac.)
The following figures may
be used for a unit hydrograph study of the same area.
Note: These figures do not consider reduced effective area effects caused by confluences in the rational equation.
Area averaged pervious area fraction(Ap) = 0.400
Area averaged SCS curve number = 32.0
San Bernardino County Rational Hydrology Program
(Hydrology Manual Date - August 1986)
CIVILCADD/CIVILDESIGN Engineering Software, (c) 1989-2019 Version 9.1 Rational Hydrology Study Date: 08/23/22
------------------------------------------------------------------------ TTM 20372
Post Development rational
100 yr
Program License Serial Number 6481
------------------------------------------------------------------------ ********* Hydrology Study Control Information ********** ------------------------------------------------------------------------ Rational hydrology study storm event year is 100.0
10 Year storm 1 hour rainfall = 0.828(In.)
100 Year storm 1 hour rainfall = 1.360(In.)
Computed rainfall intensity:
Storm year = 100.00 1 hour rainfall = 1.360 (In.)
Slope used for rainfall intensity curve b = 0.6000
Soil antecedent moisture condition (AMC) = 3
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 201.000 to Point/Station 202.000 **** INITIAL AREA EVALUATION ****
RESIDENTIAL(8 - 10 dwl/acre)
Decimal fraction soil group A = 1.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 0.000
Decimal fraction soil group D = 0.000
SCS curve number for soil(AMC 2) = 32.00
Adjusted SCS curve number for AMC 3 = 52.00
Pervious ratio(Ap) = 0.4000 Max loss rate(Fm)= 0.314(In/Hr) Initial subarea data:
Initial area flow distance = 675.730(Ft.)
Top (of initial area) elevation = 2138.240(Ft.)
Bottom (of initial area) elevation = 2121.580(Ft.)
Difference in elevation = 16.660(Ft.)
Slope = 0.02465 s(%)= 2.47
TC = k(0.374)*[(lengthA3)/(elevation change) ]^0.2
Initial area time of concentration = 10.627 min.
Rainfall intensity = 3.842(In/Hr) for a 100.0 year storm Effective runoff coefficient used for area (Q=KCIA) is C = 0.826 Subarea runoff = 8.256(CFS)
Total initial stream area = 2.600(Ac.)
Pervious area fraction = 0.400
Initial area Fm value = 0.314(In/Hr)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 202.000 to Point/Station 204.000 **** CONFLUENCE OF MINOR STREAMS ****
Along Main Stream number: 1 in normal stream number 1
Stream flow area = 2.600(Ac.)
Runoff from this stream = 8.256(CFS)
Time of concentration = 10.63 min.
Rainfall intensity = 3.842(In/Hr)
Area averaged loss rate (Fm) = 0.3141(In/Hr)
Area averaged Pervious ratio (Ap) = 0.4000
Summary of stream data:
Stream Flow rate Area TC Fm Rainfall Intensity
No. (CFS) (Ac.) (min) (In/Hr) (In/Hr)
1 8.26 2.600 10.63 0.314 3.842
Qmax(1) =
1.000 * 1.000 * 8.256) + = 8.256
Total of 1 streams to confluence:
Flow rates before confluence point:
8.256
Maximum flow rates at
confluence using above data:
8.256
Area of streams before
confluence:
2.600
Effective area values
after confluence:
2.600
Results of confluence:
Total flow rate =
8.256(CFS)
Time of concentration
= 10.627 min.
Effective stream area
after confluence =
2.600(Ac.)
Study area average Pervious
fraction(Ap)
= 0.400
Study area average soil
loss rate(Fm) =
0.314(In/Hr)
Study area total (this
main stream) =
2.60(Ac.)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 203.000 to Point/Station 204.000
**** INITIAL AREA EVALUATION ****
RESIDENTIAL(8 - 10 dwl/acre)
Decimal fraction soil group A = 1.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 0.000
Decimal fraction soil group D = 0.000
SCS curve number for soil(AMC 2) = 32.00
Adjusted SCS curve number for AMC 3 = 52.00
Pervious ratio(Ap) = 0.4000 Max loss rate(Fm)= 0.314(In/Hr) Initial subarea data:
Initial area flow distance = 693.510(Ft.)
Top (of initial area) elevation = 2135.780(Ft.)
Bottom (of initial area) elevation = 2118.430(Ft.)
Difference in elevation = 17.350(Ft.)
Slope = 0.02502 s(%)= 2.50
TC = k(0.374)*[(lengthA3)/(elevation change) ]^0.2
Initial area time of concentration = 10.706 min.
Rainfall intensity = 3.825(In/Hr) for a 100.0 year storm Effective runoff coefficient used for area (Q=KCIA) is C = 0.826 Subarea runoff = 9.859(CFS)
Total initial stream area = 3.120(Ac.)
Pervious area fraction = 0.400
Initial area Fm value = 0.314(In/Hr)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 203.000 to Point/Station 204.000 **** CONFLUENCE OF MINOR STREAMS ****
Along Main Stream number: 1 in normal stream number 2
Stream flow area = 3.120(Ac.)
Runoff from this stream = 9.859(CFS)
Time of concentration = 10.71 min.
Rainfall intensity = 3.825(In/Hr)
Area averaged loss rate (Fm) = 0.3141(In/Hr)
Area averaged Pervious ratio (Ap) = 0.4000
Summary of stream data:
Stream
Flow rate
Area TC
Fm
Rainfall Intensity
No.
(CFS)
(Ac.)
(min)
(In/Hr)
(In/Hr)
1 8.26
2.600
10.63 0.314
3.842
2 9.86
3.120
10.71 0.314
3.825
Qmax(1)
=
1.000
*
1.000 *
8.256) +
1.005
*
0.993 *
9.859) +
= 18.090
Qmax(2)
=
0.995
*
1.000 *
8.256) +
1.000 * 1.000 * 9.859) + = 18.075
Total of 2 streams to confluence:
Flow rates before confluence point:
8.256 9.859
Maximum flow rates at confluence using above data:
18.090 18.075
Area of streams before confluence:
2.600 3.120
Effective area values after confluence:
5.697 5.720
Results of confluence:
Total flow rate = 18.090(CFS)
Time of concentration = 10.627 min.
Effective stream area after confluence =
5.697(Ac.)
Study area average Pervious fraction(Ap)
= 0.400
Study area average soil loss rate(Fm) =
0.314(In/Hr)
Study area total (this main stream) =
5.72(Ac.)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 204.000 to Point/Station 208.000 **** CONFLUENCE OF MAIN STREAMS ****
The following data inside Main Stream is listed:
In Main Stream number: 1
Stream flow area = 5.697(Ac.)
Runoff from this stream = 18.090(CFS)
Time of concentration = 10.63 min.
Rainfall intensity = 3.842(In/Hr)
Area averaged loss rate (Fm) = 0.3141(In/Hr)
Area averaged Pervious ratio (Ap) = 0.4000
Summary of stream data:
Stream Flow rate Area TC Fm Rainfall Intensity
No. (CFS) (Ac.) (min) (In/Hr) (In/Hr)
1 18.09 5.697 10.63 0.314 3.842
Qmax(1) =
Total of 1 main streams to confluence:
Flow rates before confluence point:
19.090
Maximum flow rates at confluence using above data:
18.090
Area of streams before confluence:
5.697
Effective area values after confluence:
5.697
Results of confluence:
Total flow rate = 18.090(CFS)
Time of concentration = 10.627 min.
Effective stream area after confluence = 5.697(Ac.)
Study area average Pervious fraction(Ap) = 0.400
Study area average soil loss rate(Fm) = 0.314(In/Hr)
Study area total = 5.70(Ac.)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 205.000 to Point/Station 206.000 **** INITIAL AREA EVALUATION ****
RESIDENTIAL(8 - 10 dwl/acre)
Decimal fraction soil group A = 1.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 0.000
Decimal fraction soil group D = 0.000
SCS curve number for soil(AMC 2) = 32.00
Adjusted SCS curve number for AMC 3 = 52.00
Pervious ratio(Ap) = 0.4000 Max loss rate(Fm)=
Initial subarea data:
Initial area flow distance = 998.840(Ft.)
Top (of initial area) elevation = 2152.290(Ft.)
Bottom (of initial area) elevation = 2125.200(Ft.)
Difference in elevation = 27.090(Ft.)
Slope = 0.02712 s(%)= 2.71
TC = k(0.374)*[(lengthA3)/(elevation change) ]^0.2
Initial area time of concentration = 12.190 min.
Rainfall intensity = 3.539(In/Hr) for a 100.0
Effective runoff coefficient used for area (Q=KCIA)
Subarea runoff = 20.285(CFS)
Total initial stream area = 6.990(Ac.)
Pervious area fraction = 0.400
Initial area Fm value = 0.314(In/Hr)
0.314(In/Hr)
year storm
is C = 0.820
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 207.000 to Point/Station 208.000 **** INITIAL AREA EVALUATION ****
RESIDENTIAL(8 -
Decimal fraction
Decimal fraction
Decimal fraction
Decimal fraction
SCS curve number
10 dwl/acre)
soil group A = 1.000
soil group B = 0.000
soil group C = 0.000
soil group D = 0.000
for soil(AMC 2) = 32.00
Adjusted SCS curve number for AMC 3 = 52.00
Pervious ratio(Ap) = 0.4000 Max loss rate(Fm)= 0.314(In/Hr) Initial subarea data:
Initial area flow distance = 555.640(Ft.)
Top (of initial area) elevation = 2127.110(Ft.)
Bottom (of initial area) elevation = 2111.540(Ft.)
Difference in elevation = 15.570(Ft.)
Slope = 0.02802 s(%)= 2.80
TC = k(0.374)*[(lengthA3)/(elevation change) ]^0.2
Initial area time of concentration = 9.578 min.
Rainfall intensity = 4.089(In/Hr) for a 100.0 year storm Effective runoff coefficient used for area (Q=KCIA) is C = 0.831 Subarea runoff = 7.101(CFS)
Total initial stream area = 2.090(Ac.)
Pervious area fraction = 0.400
Initial area Fm value = 0.314(In/Hr)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 207.000 to Point/Station 208.000 **** CONFLUENCE OF MAIN STREAMS ****
The following data inside Main Stream is listed:
In Main Stream number: 2
Stream flow area = 2.090(Ac.)
Runoff from this stream = 7.101(CFS)
Time of concentration = 9.58 min.
Rainfall intensity = 4.089(In/Hr)
Area averaged loss rate (Fm) = 0.3141(In/Hr)
Area averaged Pervious ratio (Ap) = 0.4000
Summary of stream data:
Stream
Flow rate
Area TC
Fm
Rainfall Intensity
No.
(CFS)
(Ac.)
(min)
(In/Hr)
(In/Hr)
1 18.09
5.697
10.63 0.314
3.842
2 7.10
2.090
9.58 0.314
4.089
Qmax(1)
=
1.000
*
1.000 *
18.090) +
0.935
*
1.000 *
7.101) +
= 24.726
Qmax(2)
=
1.070
*
0.901 *
18.090) +
1.000
*
1.000 *
7.101) +
= 24.548
Total of 2 main streams to confluence:
Flow rates before confluence point:
19.090 8.101
Maximum flow rates at confluence using above data:
24.726 24.548
Area of streams before confluence:
5.697 2.090
Effective area values after confluence:
7.787 7.225
Results of confluence:
Total flow rate = 24.726(CFS)
Time of concentration = 10.627 min.
Effective stream area after confluence = 7.787(Ac.)
Study area average Pervious fraction(Ap) = 0.400
Study area average soil loss rate(Fm) = 0.314(In/Hr)
Study area total = 7.79(Ac.)
End of computations, Total Study Area = 14.80 (Ac.)
The following figures may
be used for a unit hydrograph study of the same area.
Note: These figures do not consider reduced effective area effects caused by confluences in the rational equation.
Area averaged pervious area fraction(Ap) = 0.400
Area averaged SCS curve number = 32.0
U n i t H y d r o g r a p h A n a l y s i s
Copyright (c) CIVILCADD/CIVILDESIGN, 1989 - 2018, Version 9.0 Study date 08/22/22
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ San Bernardino County Synthetic Unit Hydrology Method
Manual date - August 1986
Program License Serial Number 6481
--------------------------------------------------------------------- TTM 20372
Post Developmnet Unit Hydrograph - DA 1
2 yr
24 hr
Storm Event Year = 2
Antecedent Moisture Condition = 1
English (in -lb) Input Units Used
English Rainfall Data (Inches) Input Values Used
English Units used in output format
Area averaged rainfall intensity isohyetal data:
Sub -Area
Duration
Isohyetal
(Ac.)
(hours)
(In)
Rainfall
data for
year
10 7.81
1 0.83
-------------------------------------------------------------------- Rainfall
data for
year
2 7.81
6 1.34
-------------------------------------------------------------------- Rainfall
data for
year
2 7.81
24 2.48
-------------------------------------------------------------------- Rainfall
data for
year
100
7.81 1 1.36
--------------------------
Rainfall data for year 100
7.81 6 3.18
-------------------------------------------------------------------- Rainfall data for year 100
7.81 24 5.92
-------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ******** Area -averaged max loss rate, Fm ********
SCS curve SCS curve Area Area Fp(Fig C6) Ap Fm
No.(AMCII) NO.(AMC 1) (Ac.) Fraction (In/Hr) (dec.) (In/Hr)
32.0 16.6 7.81 1.000 1.000 0.400 0.400
Area -averaged adjusted loss rate Fm (In/Hr) = 0.400
********* Area -Averaged low loss rate fraction, Yb ********** Area Area
SCS CN
SCS CN
S Pervious
(Ac.) Fract
(AMC2)
(AMC1)
Yield Fr
3.12 0.400
32.0 16.6
12.40 0.000
4.69 0.600
98.0 98.0
0.20 0.908
Area -averaged catchment yield fraction, Y = 0.545
Area -averaged low loss fraction, Yb = 0.455
Direct entry of lag time by user
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Watershed area = 7.81(Ac.)
Catchment Lag time = 0.147 hours
Unit interval = 5.000 minutes
Unit interval percentage of lag time = 56.8440
Hydrograph baseflow = 0.00(CFS)
Average maximum watershed loss rate(Fm) = 0.400(In/Hr)
Average low loss rate fraction (Yb) = 0.455 (decimal)
VALLEY DEVELOPED S-Graph Selected
Computed peak 5-minute rainfall = 0.169(In)
Computed peak 30-minute rainfall = 0.346(In)
Specified peak 1-hour rainfall = 0.456(In)
Computed peak 3-hour rainfall = 0.883(In)
Specified peak 6-hour rainfall = 1.340(In)
Specified peak 24-hour rainfall = 2.480(In)
Rainfall depth area reduction factors:
Using a total area of 7.81(Ac.) (Ref: fig. E-4)
5-minute factor = 1.000 Adjusted rainfall = 0.169(In)
30-minute factor
= 1.000
Adjusted
rainfall =
0.346(In)
1-hour factor =
1.000
Adjusted
rainfall =
0.456(In)
3-hour factor =
1.000
Adjusted
rainfall =
0.883(In)
6-hour factor =
1.000
Adjusted
rainfall =
1.340(In)
24-hour factor =
---------------------------------------------------------------------
1.000
Adjusted
rainfall =
2.480(In)
U n i t H y d r o g r a p h
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Interval 'S' Graph Unit Hydrograph
Number Mean values ((CFS))
(K =
94.45 (CFS))
1 5.869
5.543
2 37.754
30.117
3 78.425
38.414
4 94.154
14.856
5 98.352
3.965
6 99.427
1.016
7 100.000
0.541
--------------------------------------------------------------------- Peak Unit
Adjusted mass
rainfall Unit rainfall
Number
(In)
(In)
1 0.1688
0.1688
2 0.2227
0.0539
3 0.2619
0.0392
4 0.2938
0.0319
5 0.3213
0.0274
6 0.3456
0.0243
7 0.3675
0.0220
8 0.3877
0.0202
9 0.4064
0.0187
10 0.4239
0.0175
11 0.4404
0.0165
12 0.4560
0.0156
13 0.4785
0.0225
14 0.5003
0.0218
15 0.5215
0.0212
16 0.5422
0.0207
17 0.5623
0.0201
18 0.5820
0.0197
19 0.6012
0.0192
20 0.6201
0.0188
21 0.6385
0.0185
22 0.6567
0.0181
23 0.6745
0.0178
24 0.6920
0.0175
25 0.7092
0.0172
26 0.7261
0.0169
27 0.7428
0.0167
28 0.7592
0.0164
29 0.7754
0.0162
30 0.7914
0.0160
31 0.8072
0.0158
32 0.8227
0.0156
33 0.8381
0.0154
34 0.8533
0.0152
35 0.8683
0.0150
36 0.8832
0.0148
37 0.8978
0.0147
38 0.9123
0.0145
39 0.9267
0.0144
40 0.9409
0.0142
41 0.9550
0.0141
42 0.9690
0.0139
43 0.9828
0.0138
44 0.9964
0.0137
45 1.0100
0.0136
46 1.0234
0.0134
47 1.0368
0.0133
48 1.0500
0.0132
49 1.0631
0.0131
50 1.0761
0.0130
51 1.0890
0.0129
52 1.1018
0.0128
53 1.1145
0.0127
54 1.1271
0.0126
55 1.1396
0.0125
56 1.1520
0.0124
57 1.1643
0.0123
58 1.1766
0.0122
59 1.1887
0.0122
60 1.2008
0.0121
61 1.2128
0.0120
62 1.2247
0.0119
63 1.2366
0.0118
64 1.2483
0.0118
65 1.2600
0.0117
66 1.2716
0.0116
67 1.2832
0.0116
68 1.2947
0.0115
69 1.3061
0.0114
70 1.3175
0.0114
71 1.3287
0.0113
72 1.3400
0.0112
73 1.3482
0.0082
74 1.3564
0.0082
75 1.3645
0.0081
76 1.3725
0.0080
77 1.3805
0.0080
78 1.3885
0.0079
79 1.3963
0.0079
80 1.4041
0.0078
81 1.4119
0.0078
82 1.4196
0.0077
83 1.4273
0.0077
84 1.4349
0.0076
85 1.4425
0.0076
86 1.4500
0.0075
87 1.4574
0.0075
88 1.4649
0.0074
89 1.4722
0.0074
90 1.4795
0.0073
91 1.4868
0.0073
92 1.4941
0.0072
93 1.5012
0.0072
94 1.5084
0.0071
95 1.5155
0.0071
96 1.5226
0.0071
97 1.5296
0.0070
98 1.5366
0.0070
99 1.5435
0.0069
100
1.5504
0.0069
101
1.5573
0.0069
102
1.5641
0.0068
103
1.5709
0.0068
104
1.5777
0.0068
105
1.5844
0.0067
106
1.5911
0.0067
107
1.5977
0.0066
108
1.6043
0.0066
109
1.6109
0.0066
110
1.6174
0.0065
111
1.6240
0.0065
112
1.6304
0.0065
113
1.6369
0.0064
114
1.6433
0.0064
115
1.6497
0.0064
116
1.6560
0.0064
117
1.6624
0.0063
118
1.6687
0.0063
119
1.6749
0.0063
120
1.6812
0.0062
121
1.6874
0.0062
122
1.6935
0.0062
123
1.6997
0.0062
124
1.7058
0.0061
125
1.7119
0.0061
126
1.7180
0.0061
127
1.7240
0.0060
128
1.7300
0.0060
129
1.7360
0.0060
130
1.7420
0.0060
131
1.7479
0.0059
132
1.7538
0.0059
133
1.7597
0.0059
134
1.7656
0.0059
135
1.7714
0.0058
136
1.7772
0.0058
137
1.7830
0.0058
138
1.7888
0.0058
139
1.7945
0.0057
140
1.8003
0.0057
141
1.8060
0.0057
142
1.8116
0.0057
143
1.8173
0.0057
144
1.8229
0.0056
145
1.8285
0.0056
146
1.8341
0.0056
147
1.8397
0.0056
148
1.8452
0.0055
149
1.8508
0.0055
150
1.8563
0.0055
151
1.8618
0.0055
152
1.8672
0.0055
153
1.8727
0.0054
154
1.8781
0.0054
155
1.8835
0.0054
156
1.8889
0.0054
157
1.8943
0.0054
158
1.8996
0.0053
159
1.9049
0.0053
160
1.9102
0.0053
161
1.9155
0.0053
162
1.9208
0.0053
163
1.9261
0.0053
164
1.9313
0.0052
165
1.9365
0.0052
166
1.9417
0.0052
167
1.9469
0.0052
168
1.9521
0.0052
169
1.9572
0.0052
170
1.9624
0.0051
171
1.9675
0.0051
172
1.9726
0.0051
173
1.9777
0.0051
174
1.9827
0.0051
175
1.9878
0.0051
176
1.9928
0.0050
177
1.9979
0.0050
178
2.0029
0.0050
179
2.0078
0.0050
180
2.0128
0.0050
181
2.0178
0.0050
182
2.0227
0.0049
183
2.0276
0.0049
184
2.0326
0.0049
185
2.0375
0.0049
186
2.0423
0.0049
187
2.0472
0.0049
188
2.0521
0.0049
189
2.0569
0.0048
190
2.0617
0.0048
191
2.0665
0.0048
192
2.0713
0.0048
193
2.0761
0.0048
194
2.0809
0.0048
195
2.0857
0.0048
196
2.0904
0.0047
197
2.0951
0.0047
198
2.0998
0.0047
199
2.1045
0.0047
200
2.1092
0.0047
201
2.1139
0.0047
202
2.1186
0.0047
203
2.1232
0.0047
204
2.1279
0.0046
205
2.1325
0.0046
206
2.1371
0.0046
207
2.1417
0.0046
208
2.1463
0.0046
209
2.1509
0.0046
210
2.1554
0.0046
211
2.1600
0.0046
212
2.1645
0.0045
213
2.1690
0.0045
214
2.1736
0.0045
215
2.1781
0.0045
216
2.1826
0.0045
217
2.1870
0.0045
218
2.1915
0.0045
219
2.1960
0.0045
220
2.2004
0.0044
221
2.2049
0.0044
222
2.2093
0.0044
223
2.2137
0.0044
224
2.2181
0.0044
225
2.2225
0.0044
226
2.2269
0.0044
227
2.2312
0.0044
228
2.2356
0.0044
229
2.2399
0.0043
230
2.2443
0.0043
231
2.2486
0.0043
232
2.2529
0.0043
233
2.2572
0.0043
234
2.2615
0.0043
235
2.2658
0.0043
236
2.2701
0.0043
237
2.2744
0.0043
238
2.2786
0.0043
239
2.2829
0.0042
240
2.2871
0.0042
241
2.2913
0.0042
242
2.2955
0.0042
243
2.2998
0.0042
244
2.3040
0.0042
245
2.3081
0.0042
246
2.3123
0.0042
247
2.3165
0.0042
248
2.3206
0.0042
249
2.3248
0.0042
250
2.3289
0.0041
251
2.3331
0.0041
252
2.3372
0.0041
253
2.3413
0.0041
254
2.3454
0.0041
255
2.3495
0.0041
256
2.3536
0.0041
257
2.3577
0.0041
258
2.3617
0.0041
259
2.3658
0.0041
260
2.3699
0.0041
261
2.3739
0.0040
262
2.3779
0.0040
263
2.3820
0.0040
264
2.3860
0.0040
265
2.3900
0.0040
266
2.3940
0.0040
267
2.3980
0.0040
268
2.4020
0.0040
269
2.4059
0.0040
270
2.4099
0.0040
271
2.4139
0.0040
272
2.4178
0.0040
273
2.4218
0.0039
274
2.4257
0.0039
275
2.4296
0.0039
276
2.4335
0.0039
277
2.4375
0.0039
278
2.4414
0.0039
279
2.4453
0.0039
280
2.4491
0.0039
281
2.4530
0.0039
282
2.4569
0.0039
283
2.4608
0.0039
284
2.4646
0.0039
285
2.4685
0.0038
286
2.4723
0.0038
287
2.4761
0.0038
288
2.4800
0.0038
Unit
Unit
Period
Rainfall
(number)
(In)
Unit Effective
Soil -Loss Rainfall
(In) (In)
1 0.0038
0.0017
0.0021
2 0.0038
0.0017
0.0021
3 0.0038
0.0018
0.0021
4 0.0039
0.0018
0.0021
5 0.0039
0.0018
0.0021
6 0.0039
0.0018
0.0021
7 0.0039
0.0018
0.0021
8 0.0039
0.0018
0.0021
9 0.0039
0.0018
0.0021
10 0.0039
0.0018
0.0021
11 0.0039
0.0018
0.0021
12 0.0040
0.0018
0.0022
13 0.0040
0.0018
0.0022
14 0.0040
0.0018
0.0022
15 0.0040
0.0018
0.0022
16 0.0040
0.0018
0.0022
17 0.0040
0.0018
0.0022
18 0.0040
0.0018
0.0022
19 0.0040
0.0018
0.0022
20 0.0041
0.0018
0.0022
21 0.0041
0.0019
0.0022
22 0.0041
0.0019
0.0022
23 0.0041
0.0019
0.0022
24 0.0041
0.0019
0.0022
25 0.0041
0.0019
0.0022
26 0.0041
0.0019
0.0023
27 0.0042
0.0019
0.0023
28 0.0042
0.0019
0.0023
29 0.0042
0.0019
0.0023
30 0.0042
0.0019
0.0023
31 0.0042
0.0019
0.0023
32 0.0042
0.0019
0.0023
33 0.0042
0.0019
0.0023
34 0.0042
0.0019
0.0023
35 0.0043
0.0019
0.0023
36 0.0043
0.0019
0.0023
37 0.0043
0.0020
0.0023
38 0.0043
0.0020
0.0023
39 0.0043
0.0020
0.0024
40 0.0043
0.0020
0.0024
41 0.0044
0.0020
0.0024
42 0.0044
0.0020
0.0024
43 0.0044
0.0020
0.0024
44 0.0044
0.0020
0.0024
45 0.0044
0.0020
0.0024
46 0.0044
0.0020
0.0024
47 0.0045
0.0020
0.0024
48 0.0045
0.0020
0.0024
49 0.0045
0.0020
0.0024
50 0.0045
0.0021
0.0025
51 0.0045
0.0021
0.0025
52 0.0045
0.0021
0.0025
53 0.0046
0.0021
0.0025
54 0.0046
0.0021
0.0025
55 0.0046
0.0021
0.0025
56 0.0046
0.0021
0.0025
57 0.0046
0.0021
0.0025
58 0.0047
0.0021
0.0025
59 0.0047
0.0021
0.0025
60 0.0047
0.0021
0.0026
61 0.0047
0.0021
0.0026
62 0.0047
0.0022
0.0026
63 0.0048
0.0022
0.0026
64 0.0048
0.0022
0.0026
65 0.0048
0.0022
0.0026
66 0.0048
0.0022
0.0026
67 0.0048
0.0022
0.0026
68 0.0049
0.0022
0.0026
69 0.0049
0.0022
0.0027
70 0.0049
0.0022
0.0027
71 0.0049
0.0022
0.0027
72 0.0049
0.0023
0.0027
73 0.0050
0.0023
0.0027
74 0.0050
0.0023
0.0027
75 0.0050
0.0023
0.0027
76 0.0050
0.0023
0.0027
77 0.0051
0.0023
0.0028
78 0.0051
0.0023
0.0028
79 0.0051
0.0023
0.0028
80 0.0051
0.0023
0.0028
81 0.0052
0.0024
0.0028
82 0.0052
0.0024
0.0028
83 0.0052
0.0024
0.0028
84 0.0052
0.0024
0.0029
85 0.0053
0.0024
0.0029
86 0.0053
0.0024
0.0029
87 0.0053
0.0024
0.0029
88 0.0053
0.0024
0.0029
89 0.0054
0.0025
0.0029
90 0.0054
0.0025
0.0029
91 0.0054
0.0025
0.0030
92 0.0055
0.0025
0.0030
93 0.0055
0.0025
0.0030
94 0.0055
0.0025
0.0030
95 0.0056
0.0025
0.0030
96 0.0056
0.0025
0.0030
97 0.0056
0.0026
0.0031
98 0.0057
0.0026
0.0031
99 0.0057
0.0026
0.0031
100
0.0057
0.0026
0.0031
101
0.0058
0.0026
0.0031
102
0.0058
0.0026
0.0032
103
0.0058
0.0027
0.0032
104
0.0059
0.0027
0.0032
105
0.0059
0.0027
0.0032
106
0.0059
0.0027
0.0032
107
0.0060
0.0027
0.0033
108
0.0060
0.0027
0.0033
109
0.0061
0.0028
0.0033
110
0.0061
0.0028
0.0033
111
0.0062
0.0028
0.0033
112
0.0062
0.0028
0.0034
113
0.0062
0.0028
0.0034
114
0.0063
0.0029
0.0034
115
0.0063
0.0029
0.0034
116
0.0064
0.0029
0.0035
117
0.0064
0.0029
0.0035
118
0.0064
0.0029
0.0035
119
0.0065
0.0030
0.0035
120
0.0065
0.0030
0.0036
121
0.0066
0.0030
0.0036
122
0.0066
0.0030
0.0036
123
0.0067
0.0031
0.0037
124
0.0068
0.0031
0.0037
125
0.0068
0.0031
0.0037
126
0.0069
0.0031
0.0037
127
0.0069
0.0032
0.0038
128
0.0070
0.0032
0.0038
129
0.0071
0.0032
0.0038
130
0.0071
0.0032
0.0039
131
0.0072
0.0033
0.0039
132
0.0072
0.0033
0.0039
133
0.0073
0.0033
0.0040
134
0.0074
0.0034
0.0040
135
0.0075
0.0034
0.0041
136
0.0075
0.0034
0.0041
137
0.0076
0.0035
0.0041
138
0.0077
0.0035
0.0042
139
0.0078
0.0035
0.0042
140
0.0078
0.0036
0.0043
141
0.0079
0.0036
0.0043
142
0.0080
0.0036
0.0044
143
0.0081
0.0037
0.0044
144
0.0082
0.0037
0.0044
145
0.0112
0.0051
0.0061
146
0.0113
0.0051
0.0061
147
0.0114
0.0052
0.0062
148
0.0115
0.0052
0.0063
149
0.0116
0.0053
0.0063
150
0.0117
0.0053
0.0064
151
0.0118
0.0054
0.0064
152
0.0119
0.0054
0.0065
153
0.0121
0.0055
0.0066
154
0.0122
0.0055
0.0066
155
0.0123
0.0056
0.0067
156
0.0124
0.0057
0.0068
157
0.0126
0.0057
0.0069
158
0.0127
0.0058
0.0069
159
0.0129
0.0059
0.0070
160
0.0130
0.0059
0.0071
161
0.0132
0.0060
0.0072
162
0.0133
0.0061
0.0073
163
0.0136
0.0062
0.0074
164
0.0137
0.0062
0.0075
165
0.0139
0.0063
0.0076
166
0.0141
0.0064
0.0077
167
0.0144
0.0065
0.0078
168
0.0145
0.0066
0.0079
169
0.0148
0.0068
0.0081
170
0.0150
0.0068
0.0082
171
0.0154
0.0070
0.0084
172
0.0156
0.0071
0.0085
173
0.0160
0.0073
0.0087
174
0.0162
0.0074
0.0088
175
0.0167
0.0076
0.0091
176
0.0169
0.0077
0.0092
177
0.0175
0.0080
0.0095
178
0.0178
0.0081
0.0097
179
0.0185
0.0084
0.0101
180
0.0188
0.0086
0.0103
181
0.0197
0.0090
0.0107
182
0.0201
0.0092
0.0110
183
0.0212
0.0097
0.0115
184
0.0218
0.0099
0.0119
185
0.0156
0.0071
0.0085
186
0.0165
0.0075
0.0090
187
0.0187
0.0085
0.0102
188
0.0202
0.0092
0.0110
189
0.0243
0.0111
0.0132
190
0.0274
0.0125
0.0149
191
0.0392
0.0179
0.0214
192
0.0539
0.0246
0.0294
193
0.1688
0.0333
0.1354
194
0.0319
0.0145
0.0174
195
0.0220
0.0100
0.0120
196
0.0175
0.0080
0.0095
197
0.0225
0.0102
0.0123
198
0.0207
0.0094
0.0112
199
0.0192
0.0088
0.0105
200
0.0181
0.0083
0.0099
201
0.0172
0.0078
0.0094
202
0.0164
0.0075
0.0089
203
0.0158
0.0072
0.0086
204
0.0152
0.0069
0.0083
205
0.0147
0.0067
0.0080
206
0.0142
0.0065
0.0077
207
0.0138
0.0063
0.0075
208
0.0134
0.0061
0.0073
209
0.0131
0.0060
0.0071
210
0.0128
0.0058
0.0070
211
0.0125
0.0057
0.0068
212
0.0122
0.0056
0.0067
213
0.0120
0.0055
0.0065
214
0.0118
0.0054
0.0064
215
0.0116
0.0053
0.0063
216
0.0114
0.0052
0.0062
217
0.0082
0.0037
0.0045
218
0.0080
0.0037
0.0044
219
0.0079
0.0036
0.0043
220
0.0077
0.0035
0.0042
221
0.0076
0.0034
0.0041
222
0.0074
0.0034
0.0040
223
0.0073
0.0033
0.0040
224
0.0071
0.0033
0.0039
225
0.0070
0.0032
0.0038
226
0.0069
0.0031
0.0038
227
0.0068
0.0031
0.0037
228
0.0067
0.0030
0.0036
229
0.0066
0.0030
0.0036
230
0.0065
0.0030
0.0035
231
0.0064
0.0029
0.0035
232
0.0063
0.0029
0.0034
233
0.0062
0.0028
0.0034
234
0.0061
0.0028
0.0033
235
0.0060
0.0028
0.0033
236
0.0060
0.0027
0.0032
237
0.0059
0.0027
0.0032
238
0.0058
0.0026
0.0032
239
0.0057
0.0026
0.0031
240
0.0057
0.0026
0.0031
241
0.0056
0.0026
0.0031
242
0.0055
0.0025
0.0030
243
0.0055
0.0025
0.0030
244
0.0054
0.0025
0.0030
245
0.0054
0.0024
0.0029
246
0.0053
0.0024
0.0029
247
0.0053
0.0024
0.0029
248
0.0052
0.0024
0.0028
249
0.0052
0.0023
0.0028
250
0.0051
0.0023
0.0028
251
0.0051
0.0023
0.0028
252
0.0050
0.0023
0.0027
253
0.0050
0.0023
0.0027
254
0.0049
0.0022
0.0027
255
0.0049
0.0022
0.0027
256
0.0048
0.0022
0.0026
257
0.0048
0.0022
0.0026
258
0.0047
0.0022
0.0026
259
0.0047
0.0021
0.0026
260
0.0047
0.0021
0.0025
261
0.0046
0.0021
0.0025
262
0.0046
0.0021
0.0025
263
0.0046
0.0021
0.0025
264
0.0045
0.0021
0.0025
265
0.0045
0.0020
0.0024
266
0.0044
0.0020
0.0024
267
0.0044
0.0020
0.0024
268
0.0044
0.0020
0.0024
269
0.0043
0.0020
0.0024
270
0.0043
0.0020
0.0024
271
0.0043
0.0020
0.0023
272
0.0043
0.0019
0.0023
273
0.0042
0.0019
0.0023
274
0.0042
0.0019
0.0023
275
0.0042
0.0019
0.0023
276
0.0041
0.0019
0.0023
277
0.0041
0.0019
0.0022
278
0.0041
0.0019
0.0022
279
0.0041
0.0018
0.0022
280
0.0040
0.0018
0.0022
281
0.0040
0.0018
0.0022
282
0.0040
0.0018
0.0022
283
0.0040
0.0018
0.0022
284
0.0039
0.0018
0.0021
285
0.0039
0.0018
0.0021
286
0.0039
0.0018
0.0021
287
0.0039
0.0018
0.0021
288
0.0038
0.0017
0.0021
-------------------------------------------------------------------- Total soil rain loss = 1.09(In)
Total effective rainfall = 1.39(In)
Peak flow rate in flood hydrograph = 6.34(CFS)
--------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 24 -
H O U
R S T 0 R M
R
u n o f
f
H y d r o g r a p h
-------------------------------------------------------------------- Hydrograph in
5 Minute intervals ((CFS))
-------------------------------------------------------------------- Time(h+m)
Volume Ac.Ft
Q(CFS)
0 2.5 5.0 7.5 10.0
----------------------------------------------------------------------- 0+ 5
0.0001
0.01 Q
0+10
0.0006
0.07 Q
0+15
0.0017
0.15 Q
0+20
0.0029
0.19 Q
0+25
0.0043
0.19 Q
0+30
0.0056
0.20 Q
0+35
0.0070
0.20 Q
0+40
0.0084
0.20 Q
0+45
0.0098
0.20 Q
0+50
0.0112
0.20 Q
0+55
0.0125
0.20 Q
1+ 0
0.0139
0.20 Q
1+ 5
0.0153
0.20 Q
1+10
0.0167
0.20 Q
1+15
0.0181
0.20 Q
1+20
0.0195
0.20 Q
1+25
0.0210
0.21 Q
1+30
0.0224
0.21 Q
1+35
0.0238
0.21 QV
1+40
0.0252
0.21 QV
1+45
0.0267
0.21 QV
1+50
0.0281
0.21 QV
1+55
0.0295
0.21 QV
2+ 0
0.0310
0.21 QV
2+ 5
0.0324
0.21 QV
2+10
0.0339
0.21 QV
2+15
0.0354
0.21 QV
2+20
0.0368
0.21 QV
2+25
0.0383
0.21 QV
2+30
0.0398
0.21 QV
2+35
0.0412
0.21 QV
2+40
0.0427
0.22 QV
2+45
0.0442
0.22 QV
2+50
0.0457
0.22 Q V
2+55
0.0472
0.22 Q V
3+ 0
0.0487
0.22 Q V
3+ 5
0.0502
0.22 Q V
3+10
0.0517
0.22 Q V
3+15
0.0533
0.22 Q V
3+20
0.0548
0.22 Q V
3+25
0.0563
0.22 Q V
3+30
0.0579
0.22 Q V
3+35
0.0594
0.22 Q V
3+40
0.0610
0.23 Q V
3+45
0.0625
0.23 Q V
3+50
0.0641
0.23 Q V
3+55
0.0656
0.23 Q V
4+ 0
0.0672
0.23 Q V
4+ 5
0.0688
0.23 Q V
4+10
0.0704
0.23 Q V
4+15
0.0720
0.23 Q V
4+20
0.0736
0.23 Q V
4+25
0.0752
0.23 Q V
4+30
0.0768
0.23 Q V
4+35
0.0784
0.23 Q V
4+40
0.0800
0.24 Q V
4+45
0.0817
0.24 Q V
4+50
0.0833
0.24 Q V
4+55
0.0849
0.24 Q V
5+ 0
0.0866
0.24 Q V
5+ 5
0.0882
0.24 Q V
5+10
0.0899
0.24 Q V
5+15
0.0916
0.24 Q V
5+20
0.0933
0.24 Q V
5+25
0.0949
0.24 Q V
5+30
0.0966
0.25 Q V
5+35
0.0983
0.25 Q V
5+40
0.1000
0.25 Q V
5+45
0.1017
0.25 Q V
5+50
0.1035
0.25 IQ V
5+55
0.1052
0.25 IQ V
6+ 0
0.1069
0.25 IQ V
6+ 5
0.1087
0.25 IQ V
6+10
0.1104
0.25 IQ V
6+15
0.1122
0.26 IQ V
6+20
0.1140
0.26 IQ V
6+25
0.1157
0.26 IQ V
6+30
0.1175
0.26 IQ V
6+35
0.1193
0.26 IQ V
6+40
0.1211
0.26 IQ V
6+45
0.1229
0.26 Q
6+50
0.1248
0.26 IQ
6+55
0.1266
0.27 IQ
7+ 0
0.1284
0.27 IQ
7+ 5
0.1303
0.27 IQ
7+10
0.1321
0.27 IQ
7+15
0.1340
0.27 IQ
7+20
0.1359
0.27 IQ
7+25
0.1378
0.27 IQ
7+30
0.1397
0.28 IQ
7+35
0.1416
0.28 IQ
7+40
0.1435
0.28 IQ
7+45
0.1454
0.28 IQ
7+50
0.1474
0.28 IQ
7+55
0.1493
0.28 IQ
8+ 0
0.1513
0.28 IQ
8+ 5
0.1533
0.29 IQ
8+10
0.1552
0.29 IQ
8+15
0.1572
0.29 IQ
8+20
0.1592
0.29 IQ
8+25
0.1613
0.29 IQ
8+30
0.1633
0.29 IQ
8+35
0.1653
0.30 IQ
8+40
0.1674
0.30 IQ
8+45
0.1695
0.30 IQ
8+50
0.1715
0.30 IQ
8+55
0.1736
0.30 IQ
9+ 0
0.1757
0.31 IQ
9+ 5
0.1779
0.31 IQ
9+10
0.1800
0.31 IQ
9+15
0.1821
0.31 IQ
9+20
0.1843
0.31 IQ
9+25
0.1865
0.32 IQ
9+30
0.1887
0.32 IQ
9+35
0.1909
0.32 IQ
9+40
0.1931
0.32 IQ
9+45
0.1954
0.33 IQ
9+50
0.1976
0.33 IQ
9+55
0.1999
0.33 IQ
10+ 0
0.2022
0.33 IQ
10+ 5
0.2045
0.33 IQ
10+10
0.2068
0.34 IQ
10+15
0.2091
0.34 IQ
10+20
0.2115
0.34 IQ
10+25
0.2139
0.35 IQ
10+30
0.2163
0.35 IQ
10+35
0.2187
0.35 IQ
10+40
0.2211
0.35 IQ
10+45
0.2236
0.36 IQ
10+50
0.2261
0.36 IQ
4 M
4 M
4 M
4 10+55
0.2286
0.36 11+ 0
0.2311
0.37 11+ 5
0.2337
0.37 11+10
0.2362
0.37 11+15
0.2388
0.38 11+20
0.2414
0.38 11+25
0.2441
0.38 11+30
0.2467
0.39 11+35
0.2494
0.39 11+40
0.2522
0.40 11+45
0.2549
0.40 11+50
0.2577
0.40 11+55
0.2605
0.41 12+ 0
0.2633
0.41 12+ 5
0.2663
0.43 12+10
0.2696
0.48 12+15
0.2733
0.54 12+20
0.2773
0.57 12+25
0.2813
0.58 12+30
0.2854
0.59 12+35
0.2895
0.60 12+40
0.2937
0.60 12+45
0.2978
0.61 12+50
0.3021
0.61 12+55
0.3064
0.62 13+ 0
0.3107
0.63 13+ 5
0.3150
0.63 13+10
0.3195
0.64 13+15
0.3239
0.65 13+20
0.3284
0.66 13+25
0.3330
0.66 13+30
0.3376
0.67 13+35
0.3423
0.68 13+40
0.3470
0.69 13+45
0.3519
0.70 13+50
0.3567
0.71 13+55
0.3617
0.72 14+ 0
0.3667
0.73 14+ 5
0.3718
0.74 14+10
0.3769
0.75 14+15
0.3822
0.76 14+20
0.3875
0.78 14+25
0.3930
0.79 14+30
0.3985
0.81 14+35
0.4042
0.82 14+40
0.4100
0.84 14+45
0.4159
0.86 14+50
0.4219
0.88 14+55
0.4281
0.90 15+ 0
0.4345
0.92 4
M
4 M
15+ 5
0.4411
0.95 Q
15+10
0.4478
0.98 Q
15+15
0.4548
1.01 Q
15+20
0.4620
1.05 Q
15+25
0.4694
1.07 Q
15+30
0.4762
0.99 Q
15+35
0.4824
0.89 Q
15+40
0.4886
0.90 Q
15+45
0.4953
0.98 Q
15+50
0.5030
1.11 Q
15+55
0.5119
1.29 Q
16+ 0
0.5231
1.64 Q
16+ 5
0.5420
2.75 16+10
0.5813
5.70 16+15
0.6249
6.34 16+20
0.6472
3.24 16+25
0.6586
1.65 Q
16+30
0.6669
1.20 Q
16+35
0.6748
1.15 Q
16+40
0.6820
1.04 Q
16+45
0.6887
0.98 Q
16+50
0.6951
0.93 Q
16+55
0.7012
0.88 Q
17+ 0
0.7070
0.84 Q
17+ 5
0.7126
0.81 Q
17+10
0.7180
0.78 Q
17+15
0.7231
0.75 Q
17+20
0.7282
0.73 Q
17+25
0.7330
0.71 Q
17+30
0.7378
0.69 Q
17+35
0.7424
0.67 Q
17+40
0.7469
0.66 Q
17+45
0.7514
0.64 Q
17+50
0.7557
0.63 Q
17+55
0.7599
0.62 Q
18+ 0
0.7641
0.60 Q
18+ 5
0.7681
0.58 Q
18+10
0.7717
0.53 Q
18+15
0.7749
0.45 IQ
18+20
0.7778
0.42 IQ
18+25
0.7806
0.41 IQ
18+30
0.7833
0.40 IQ
18+35
0.7860
0.39 IQ
18+40
0.7886
0.38 IQ
18+45
0.7912
0.37 IQ
18+50
0.7937
0.37 IQ
18+55
0.7962
0.36 IQ
19+ 0
0.7986
0.35 IQ
19+ 5
0.8010
0.35 IQ
19+10
0.8034
0.34 IQ
x
V
V
V
V
Q V
Q V
u
19+15
0.8057
0.34 19+20
0.8080
0.33 19+25
0.8103
0.33 19+30
0.8125
0.32 19+35
0.8147
0.32 19+40
0.8169
0.31 19+45
0.8190
0.31 19+50
0.8211
0.31 19+55
0.8232
0.30 20+ 0
0.8252
0.30 20+ 5
0.8273
0.30 20+10
0.8293
0.29 20+15
0.8313
0.29 20+20
0.8332
0.28 20+25
0.8352
0.28 20+30
0.8371
0.28 20+35
0.8390
0.28 20+40
0.8409
0.27 20+45
0.8427
0.27 20+50
0.8446
0.27 20+55
0.8464
0.26 21+ 0
0.8482
0.26 21+ 5
0.8500
0.26 21+10
0.8518
0.26 21+15
0.8535
0.25 21+20
0.8552
0.25 21+25
0.8570
0.25 21+30
0.8587
0.25 21+35
0.8604
0.25 21+40
0.8620
0.24 21+45
0.8637
0.24 21+50
0.8654
0.24 21+55
0.8670
0.24 22+ 0
0.8686
0.24 22+ 5
0.8702
0.23 22+10
0.8718
0.23 22+15
0.8734
0.23 22+20
0.8750
0.23 22+25
0.8766
0.23 22+30
0.8781
0.23 22+35
0.8796
0.22 22+40
0.8812
0.22 22+45
0.8827
0.22 22+50
0.8842
0.22 22+55
0.8857
0.22 23+ 0
0.8872
0.22 23+ 5
0.8887
0.21 23+10
0.8901
0.21 23+15
0.8916
0.21 23+20
0.8930
0.21 23+25
0.8945
0.21 Q I
I I VI
23+30
0.8959
0.21 Q I
I I VI
23+35
0.8973
0.21 Q I
I I VI
23+40
0.8987
0.20 Q I
I I VI
23+45
0.9001
0.20 Q I
I I VI
23+50
0.9015
0.20 Q I
I I VI
23+55
0.9029
0.20 Q I
I I VI
24+ 0
0.9043
0.20 Q I
I I VI
24+ 5
0.9056
0.19 Q I
I I VI
24+10
0.9064
0.12 Q I
I I VI
24+15
0.9067
0.04 Q I
I I VI
24+20
0.9068
0.01 Q I
I I VI
24+25
0.9068
0.00 Q I
I I VI
24+30
-----------------------------------------------------------------------
0.9068
0.00 Q I
I I VI
U n i t H y d r o g r a p h A n a l y s i s
Copyright (c) CIVILCADD/CIVILDESIGN, 1989 - 2018, Version 9.0 Study date 08/22/22
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ San Bernardino County Synthetic Unit Hydrology Method
Manual date - August 1986
Program License Serial Number 6481
--------------------------------------------------------------------- TTM 20372
Post Developmnet Unit Hydrograph - DA 1
10 yr
24 hr
Storm Event Year = 10
Antecedent Moisture Condition = 2
English (in -lb) Input Units Used
English Rainfall Data (Inches) Input Values Used
English Units used in output format
Area averaged rainfall intensity isohyetal data:
Sub -Area
Duration
Isohyetal
(Ac.)
(hours)
(In)
Rainfall
data for
year
10 7.81
1 0.83
-------------------------------------------------------------------- Rainfall
data for
year
2 7.81
6 1.34
-------------------------------------------------------------------- Rainfall
data for
year
2 7.81
24 2.48
-------------------------------------------------------------------- Rainfall
data for
year
100
7.81 1 1.36
--------------------------
Rainfall data for year 100
7.81 6 3.18
-------------------------------------------------------------------- Rainfall data for year 100
7.81 24 5.92
-------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ******** Area -averaged max loss rate, Fm ********
SCS curve SCS curve Area Area Fp(Fig C6) Ap Fm
No.(AMCII) NO.(AMC 2) (Ac.) Fraction (In/Hr) (dec.) (In/Hr)
32.0 32.0 7.81 1.000 0.978 0.400 0.391
Area -averaged adjusted loss rate Fm (In/Hr) = 0.391
********* Area -Averaged low loss rate fraction, Yb ********** Area Area
SCS CN
SCS CN
S Pervious
(Ac.) Fract
(AMC2)
(AMC2)
Yield Fr
3.12 0.400
32.0 32.0
19.48 0.000
4.69 0.600
98.0 98.0
0.20 0.940
Area -averaged catchment yield fraction, Y = 0.564
Area -averaged low loss fraction, Yb = 0.436
Direct entry of lag time by user
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Watershed area = 7.81(Ac.)
Catchment Lag time = 0.147 hours
Unit interval = 5.000 minutes
Unit interval percentage of lag time = 56.8440
Hydrograph baseflow = 0.00(CFS)
Average maximum watershed loss rate(Fm) = 0.391(In/Hr)
Average low loss rate fraction (Yb) = 0.436 (decimal)
VALLEY DEVELOPED S-Graph Selected
Computed peak 5-minute rainfall = 0.306(In)
Computed peak 30-minute rainfall = 0.628(In)
Specified peak 1-hour rainfall = 0.828(In)
Computed peak 3-hour rainfall = 1.464(In)
Specified peak 6-hour rainfall = 2.097(In)
Specified peak 24-hour rainfall = 3.895(In)
Rainfall depth area reduction factors:
Using a total area of 7.81(Ac.) (Ref: fig. E-4)
5-minute factor = 1.000 Adjusted rainfall = 0.306(In)
30-minute factor
= 1.000
Adjusted
rainfall =
0.627(In)
1-hour factor =
1.000
Adjusted
rainfall =
0.828(In)
3-hour factor =
1.000
Adjusted
rainfall =
1.464(In)
6-hour factor =
1.000
Adjusted
rainfall =
2.097(In)
24-hour factor =
---------------------------------------------------------------------
1.000
Adjusted
rainfall =
3.895(In)
U n i t H y d r o g r a p h
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Interval 'S' Graph Unit Hydrograph
Number Mean values ((CFS))
(K =
94.45 (CFS))
1 5.869
5.543
2 37.754
30.117
3 78.425
38.414
4 94.154
14.856
5 98.352
3.965
6 99.427
1.016
7 100.000
0.541
--------------------------------------------------------------------- Peak Unit
Adjusted mass
rainfall Unit rainfall
Number
(In)
(In)
1 0.3063
0.3063
2 0.4042
0.0979
3 0.4754
0.0712
4 0.5334
0.0580
5 0.5832
0.0498
6 0.6273
0.0441
7 0.6672
0.0399
8 0.7038
0.0366
9 0.7377
0.0340
10 0.7695
0.0318
11 0.7994
0.0299
12 0.8277
0.0283
13 0.8628
0.0351
14 0.8966
0.0338
15 0.9293
0.0327
16 0.9610
0.0316
17 0.9917
0.0307
18 1.0215
0.0299
19 1.0506
0.0291
20 1.0789
0.0283
21 1.1066
0.0277
22 1.1336
0.0270
23 1.1601
0.0265
24 1.1860
0.0259
25 1.2114
0.0254
26 1.2363
0.0249
27 1.2607
0.0244
28 1.2848
0.0240
29 1.3084
0.0236
30 1.3316
0.0232
31 1.3544
0.0229
32 1.3769
0.0225
33 1.3991
0.0222
34 1.4209
0.0218
35 1.4425
0.0215
36 1.4637
0.0212
37 1.4847
0.0209
38 1.5053
0.0207
39 1.5258
0.0204
40 1.5459
0.0202
41 1.5658
0.0199
42 1.5855
0.0197
43 1.6050
0.0195
44 1.6243
0.0193
45 1.6433
0.0190
46 1.6621
0.0188
47 1.6808
0.0186
48 1.6992
0.0185
49 1.7175
0.0183
50 1.7356
0.0181
51 1.7535
0.0179
52 1.7713
0.0177
53 1.7889
0.0176
54 1.8063
0.0174
55 1.8236
0.0173
56 1.8407
0.0171
57 1.8577
0.0170
58 1.8745
0.0168
59 1.8912
0.0167
60 1.9077
0.0166
61 1.9242
0.0164
62 1.9405
0.0163
63 1.9566
0.0162
64 1.9727
0.0160
65 1.9886
0.0159
66 2.0044
0.0158
67 2.0201
0.0157
68 2.0357
0.0156
69 2.0512
0.0155
70 2.0665
0.0154
71 2.0818
0.0153
72 2.0969
0.0152
73 2.1099
0.0130
74 2.1228
0.0129
75 2.1355
0.0128
76 2.1482
0.0127
77 2.1608
0.0126
78 2.1733
0.0125
79 2.1857
0.0124
80 2.1980
0.0123
81 2.2102
0.0122
82 2.2224
0.0121
83 2.2344
0.0121
84 2.2464
0.0120
85 2.2583
0.0119
86 2.2702
0.0118
87 2.2819
0.0118
88 2.2936
0.0117
89 2.3052
0.0116
90 2.3167
0.0115
91 2.3282
0.0115
92 2.3396
0.0114
93 2.3509
0.0113
94 2.3622
0.0113
95 2.3734
0.0112
96 2.3845
0.0111
97 2.3956
0.0111
98 2.4066
0.0110
99 2.4175
0.0109
100
2.4284
0.0109
101
2.4392
0.0108
102
2.4500
0.0108
103
2.4607
0.0107
104
2.4713
0.0106
105
2.4819
0.0106
106
2.4924
0.0105
107
2.5029
0.0105
108
2.5133
0.0104
109
2.5237
0.0104
110
2.5340
0.0103
111
2.5443
0.0103
112
2.5545
0.0102
113
2.5646
0.0102
114
2.5748
0.0101
115
2.5848
0.0101
116
2.5948
0.0100
117
2.6048
0.0100
118
2.6147
0.0099
119
2.6246
0.0099
120
2.6344
0.0098
121
2.6442
0.0098
122
2.6540
0.0097
123
2.6637
0.0097
124
2.6733
0.0097
125
2.6829
0.0096
126
2.6925
0.0096
127
2.7020
0.0095
128
2.7115
0.0095
129
2.7209
0.0094
130
2.7303
0.0094
131
2.7397
0.0094
132
2.7490
0.0093
133
2.7583
0.0093
134
2.7675
0.0092
135
2.7768
0.0092
136
2.7859
0.0092
137
2.7951
0.0091
138
2.8042
0.0091
139
2.8132
0.0091
140
2.8222
0.0090
141
2.8312
0.0090
142
2.8402
0.0090
143
2.8491
0.0089
144
2.8580
0.0089
145
2.8668
0.0088
146
2.8756
0.0088
147
2.8844
0.0088
148
2.8932
0.0087
149
2.9019
0.0087
150
2.9106
0.0087
151
2.9192
0.0087
152
2.9278
0.0086
153
2.9364
0.0086
154
2.9450
0.0086
155
2.9535
0.0085
156
2.9620
0.0085
157
2.9705
0.0085
158
2.9789
0.0084
159
2.9873
0.0084
160
2.9957
0.0084
161
3.0040
0.0083
162
3.0124
0.0083
163
3.0207
0.0083
164
3.0289
0.0083
165
3.0372
0.0082
166
3.0454
0.0082
167
3.0536
0.0082
168
3.0617
0.0082
169
3.0698
0.0081
170
3.0779
0.0081
171
3.0860
0.0081
172
3.0941
0.0080
173
3.1021
0.0080
174
3.1101
0.0080
175
3.1181
0.0080
176
3.1260
0.0079
177
3.1339
0.0079
178
3.1418
0.0079
179
3.1497
0.0079
180
3.1575
0.0078
181
3.1654
0.0078
182
3.1732
0.0078
183
3.1809
0.0078
184
3.1887
0.0078
185
3.1964
0.0077
186
3.2041
0.0077
187
3.2118
0.0077
188
3.2195
0.0077
189
3.2271
0.0076
190
3.2347
0.0076
191
3.2423
0.0076
192
3.2499
0.0076
193
3.2574
0.0076
194
3.2650
0.0075
195
3.2725
0.0075
196
3.2800
0.0075
197
3.2874
0.0075
198
3.2949
0.0074
199
3.3023
0.0074
200
3.3097
0.0074
201
3.3171
0.0074
202
3.3244
0.0074
203
3.3318
0.0073
204
3.3391
0.0073
205
3.3464
0.0073
206
3.3537
0.0073
207
3.3610
0.0073
208
3.3682
0.0072
209
3.3754
0.0072
210
3.3826
0.0072
211
3.3898
0.0072
212
3.3970
0.0072
213
3.4041
0.0071
214
3.4113
0.0071
215
3.4184
0.0071
216
3.4255
0.0071
217
3.4325
0.0071
218
3.4396
0.0071
219
3.4466
0.0070
220
3.4537
0.0070
221
3.4607
0.0070
222
3.4676
0.0070
223
3.4746
0.0070
224
3.4816
0.0070
225
3.4885
0.0069
226
3.4954
0.0069
227
3.5023
0.0069
228
3.5092
0.0069
229
3.5161
0.0069
230
3.5229
0.0069
231
3.5298
0.0068
232
3.5366
0.0068
233
3.5434
0.0068
234
3.5502
0.0068
235
3.5569
0.0068
236
3.5637
0.0068
237
3.5704
0.0067
238
3.5771
0.0067
239
3.5838
0.0067
240
3.5905
0.0067
241
3.5972
0.0067
242
3.6039
0.0067
243
3.6105
0.0066
244
3.6171
0.0066
245
3.6238
0.0066
246
3.6304
0.0066
247
3.6369
0.0066
248
3.6435
0.0066
249
3.6501
0.0066
250
3.6566
0.0065
251
3.6631
0.0065
252
3.6697
0.0065
253
3.6762
0.0065
254
3.6826
0.0065
255
3.6891
0.0065
256
3.6956
0.0065
257
3.7020
0.0064
258
3.7084
0.0064
259
3.7148
0.0064
260
3.7212
0.0064
261
3.7276
0.0064
262
3.7340
0.0064
263
3.7404
0.0064
264
3.7467
0.0063
265
3.7530
0.0063
266
3.7594
0.0063
267
3.7657
0.0063
268
3.7720
0.0063
269
3.7782
0.0063
270
3.7845
0.0063
271
3.7908
0.0063
272
3.7970
0.0062
273
3.8032
0.0062
274
3.8095
0.0062
275
3.8157
0.0062
276
3.8219
0.0062
277
3.8280
0.0062
278
3.8342
0.0062
279
3.8404
0.0062
280
3.8465
0.0061
281
3.8526
0.0061
282
3.8587
0.0061
283
3.8649
0.0061
284
3.8709
0.0061
285
3.8770
0.0061
286
3.8831
0.0061
287
3.8892
0.0061
288
3.8952
0.0060
Unit
Unit
Period
Rainfall
(number)
(In)
Unit Effective
Soil -Loss Rainfall
(In) (In)
1 0.0060
0.0026
0.0034
2 0.0061
0.0026
0.0034
3 0.0061
0.0027
0.0034
4 0.0061
0.0027
0.0034
5 0.0061
0.0027
0.0034
6 0.0061
0.0027
0.0035
7 0.0062
0.0027
0.0035
8 0.0062
0.0027
0.0035
9 0.0062
0.0027
0.0035
10 0.0062
0.0027
0.0035
11 0.0062
0.0027
0.0035
12 0.0062
0.0027
0.0035
13 0.0063
0.0027
0.0035
14 0.0063
0.0027
0.0035
15 0.0063
0.0028
0.0036
16 0.0063
0.0028
0.0036
17 0.0063
0.0028
0.0036
18 0.0064
0.0028
0.0036
19 0.0064
0.0028
0.0036
20 0.0064
0.0028
0.0036
21 0.0064
0.0028
0.0036
22 0.0064
0.0028
0.0036
23 0.0065
0.0028
0.0036
24 0.0065
0.0028
0.0037
25 0.0065
0.0028
0.0037
26 0.0065
0.0028
0.0037
27 0.0066
0.0029
0.0037
28 0.0066
0.0029
0.0037
29 0.0066
0.0029
0.0037
30 0.0066
0.0029
0.0037
31 0.0066
0.0029
0.0037
32 0.0067
0.0029
0.0038
33 0.0067
0.0029
0.0038
34 0.0067
0.0029
0.0038
35 0.0067
0.0029
0.0038
36 0.0068
0.0029
0.0038
37 0.0068
0.0030
0.0038
38 0.0068
0.0030
0.0038
39 0.0068
0.0030
0.0039
40 0.0069
0.0030
0.0039
41 0.0069
0.0030
0.0039
42 0.0069
0.0030
0.0039
43 0.0069
0.0030
0.0039
44 0.0070
0.0030
0.0039
45 0.0070
0.0030
0.0039
46 0.0070
0.0031
0.0039
47 0.0070
0.0031
0.0040
48 0.0071
0.0031
0.0040
49 0.0071
0.0031
0.0040
50 0.0071
0.0031
0.0040
51 0.0071
0.0031
0.0040
52 0.0072
0.0031
0.0040
53 0.0072
0.0031
0.0041
54 0.0072
0.0032
0.0041
55 0.0073
0.0032
0.0041
56 0.0073
0.0032
0.0041
57 0.0073
0.0032
0.0041
58 0.0073
0.0032
0.0041
59 0.0074
0.0032
0.0042
60 0.0074
0.0032
0.0042
61 0.0074
0.0032
0.0042
62 0.0075
0.0033
0.0042
63 0.0075
0.0033
0.0042
64 0.0075
0.0033
0.0042
65 0.0076
0.0033
0.0043
66 0.0076
0.0033
0.0043
67 0.0076
0.0033
0.0043
68 0.0077
0.0033
0.0043
69 0.0077
0.0034
0.0043
70 0.0077
0.0034
0.0044
71 0.0078
0.0034
0.0044
72 0.0078
0.0034
0.0044
73 0.0078
0.0034
0.0044
74 0.0079
0.0034
0.0044
75 0.0079
0.0035
0.0045
76 0.0079
0.0035
0.0045
77 0.0080
0.0035
0.0045
78 0.0080
0.0035
0.0045
79 0.0081
0.0035
0.0046
80 0.0081
0.0035
0.0046
81 0.0082
0.0036
0.0046
82 0.0082
0.0036
0.0046
83 0.0082
0.0036
0.0046
84 0.0083
0.0036
0.0047
85 0.0083
0.0036
0.0047
86 0.0083
0.0036
0.0047
87 0.0084
0.0037
0.0047
88 0.0084
0.0037
0.0048
89 0.0085
0.0037
0.0048
90 0.0085
0.0037
0.0048
91 0.0086
0.0037
0.0048
92 0.0086
0.0038
0.0049
93 0.0087
0.0038
0.0049
94 0.0087
0.0038
0.0049
95 0.0088
0.0038
0.0050
96 0.0088
0.0038
0.0050
97 0.0089
0.0039
0.0050
98 0.0089
0.0039
0.0050
99 0.0090
0.0039
0.0051
100
0.0090
0.0039
0.0051
101
0.0091
0.0040
0.0051
102
0.0091
0.0040
0.0051
103
0.0092
0.0040
0.0052
104
0.0092
0.0040
0.0052
105
0.0093
0.0041
0.0053
106
0.0094
0.0041
0.0053
107
0.0094
0.0041
0.0053
108
0.0095
0.0041
0.0053
109
0.0096
0.0042
0.0054
110
0.0096
0.0042
0.0054
111
0.0097
0.0042
0.0055
112
0.0097
0.0042
0.0055
113
0.0098
0.0043
0.0055
114
0.0099
0.0043
0.0056
115
0.0100
0.0043
0.0056
116
0.0100
0.0044
0.0056
117
0.0101
0.0044
0.0057
118
0.0102
0.0044
0.0057
119
0.0103
0.0045
0.0058
120
0.0103
0.0045
0.0058
121
0.0104
0.0045
0.0059
122
0.0105
0.0046
0.0059
123
0.0106
0.0046
0.0060
124
0.0106
0.0046
0.0060
125
0.0108
0.0047
0.0061
126
0.0108
0.0047
0.0061
127
0.0109
0.0048
0.0062
128
0.0110
0.0048
0.0062
129
0.0111
0.0049
0.0063
130
0.0112
0.0049
0.0063
131
0.0113
0.0049
0.0064
132
0.0114
0.0050
0.0064
133
0.0115
0.0050
0.0065
134
0.0116
0.0051
0.0065
135
0.0118
0.0051
0.0066
136
0.0118
0.0052
0.0067
137
0.0120
0.0052
0.0068
138
0.0121
0.0053
0.0068
139
0.0122
0.0053
0.0069
140
0.0123
0.0054
0.0069
141
0.0125
0.0054
0.0070
142
0.0126
0.0055
0.0071
143
0.0128
0.0056
0.0072
144
0.0129
0.0056
0.0073
145
0.0152
0.0066
0.0085
146
0.0153
0.0067
0.0086
147
0.0155
0.0067
0.0087
148
0.0156
0.0068
0.0088
149
0.0158
0.0069
0.0089
150
0.0159
0.0069
0.0090
151
0.0162
0.0071
0.0091
152
0.0163
0.0071
0.0092
153
0.0166
0.0072
0.0093
154
0.0167
0.0073
0.0094
155
0.0170
0.0074
0.0096
156
0.0171
0.0075
0.0097
157
0.0174
0.0076
0.0098
158
0.0176
0.0077
0.0099
159
0.0179
0.0078
0.0101
160
0.0181
0.0079
0.0102
161
0.0185
0.0080
0.0104
162
0.0186
0.0081
0.0105
163
0.0190
0.0083
0.0107
164
0.0193
0.0084
0.0109
165
0.0197
0.0086
0.0111
166
0.0199
0.0087
0.0112
167
0.0204
0.0089
0.0115
168
0.0207
0.0090
0.0117
169
0.0212
0.0093
0.0120
170
0.0215
0.0094
0.0121
171
0.0222
0.0097
0.0125
172
0.0225
0.0098
0.0127
173
0.0232
0.0101
0.0131
174
0.0236
0.0103
0.0133
175
0.0244
0.0107
0.0138
176
0.0249
0.0109
0.0140
177
0.0259
0.0113
0.0146
178
0.0265
0.0115
0.0149
179
0.0277
0.0121
0.0156
180
0.0283
0.0124
0.0160
181
0.0299
0.0130
0.0168
182
0.0307
0.0134
0.0173
183
0.0327
0.0143
0.0184
184
0.0338
0.0148
0.0191
185
0.0283
0.0123
0.0160
186
0.0299
0.0130
0.0169
187
0.0340
0.0148
0.0191
188
0.0366
0.0160
0.0206
189
0.0441
0.0192
0.0249
190
0.0498
0.0217
0.0281
191
0.0712
0.0310
0.0401
192
0.0979
0.0326
0.0653
193
0.3063
0.0326
0.2737
194
0.0580
0.0253
0.0327
195
0.0399
0.0174
0.0225
196
0.0318
0.0138
0.0179
197
0.0351
0.0153
0.0198
198
0.0316
0.0138
0.0178
199
0.0291
0.0127
0.0164
200
0.0270
0.0118
0.0152
201
0.0254
0.0111
0.0143
202
0.0240
0.0105
0.0135
203
0.0229
0.0100
0.0129
204
0.0218
0.0095
0.0123
205
0.0209
0.0091
0.0118
206
0.0202
0.0088
0.0114
207
0.0195
0.0085
0.0110
208
0.0188
0.0082
0.0106
209
0.0183
0.0080
0.0103
210
0.0177
0.0077
0.0100
211
0.0173
0.0075
0.0097
212
0.0168
0.0073
0.0095
213
0.0164
0.0072
0.0093
214
0.0160
0.0070
0.0090
215
0.0157
0.0068
0.0088
216
0.0154
0.0067
0.0087
217
0.0130
0.0057
0.0073
218
0.0127
0.0055
0.0071
219
0.0124
0.0054
0.0070
220
0.0121
0.0053
0.0068
221
0.0119
0.0052
0.0067
222
0.0117
0.0051
0.0066
223
0.0115
0.0050
0.0065
224
0.0113
0.0049
0.0063
225
0.0111
0.0048
0.0062
226
0.0109
0.0047
0.0061
227
0.0107
0.0047
0.0060
228
0.0105
0.0046
0.0059
229
0.0104
0.0045
0.0058
230
0.0102
0.0045
0.0058
231
0.0101
0.0044
0.0057
232
0.0099
0.0043
0.0056
233
0.0098
0.0043
0.0055
234
0.0097
0.0042
0.0054
235
0.0095
0.0042
0.0054
236
0.0094
0.0041
0.0053
237
0.0093
0.0040
0.0052
238
0.0092
0.0040
0.0052
239
0.0091
0.0040
0.0051
240
0.0090
0.0039
0.0050
241
0.0088
0.0039
0.0050
242
0.0087
0.0038
0.0049
243
0.0087
0.0038
0.0049
244
0.0086
0.0037
0.0048
245
0.0085
0.0037
0.0048
246
0.0084
0.0037
0.0047
247
0.0083
0.0036
0.0047
248
0.0082
0.0036
0.0046
249
0.0081
0.0035
0.0046
250
0.0080
0.0035
0.0045
251
0.0080
0.0035
0.0045
252
0.0079
0.0034
0.0045
253
0.0078
0.0034
0.0044
254
0.0078
0.0034
0.0044
255
0.0077
0.0034
0.0043
256
0.0076
0.0033
0.0043
257
0.0076
0.0033
0.0043
258
0.0075
0.0033
0.0042
259
0.0074
0.0032
0.0042
260
0.0074
0.0032
0.0042
261
0.0073
0.0032
0.0041
262
0.0072
0.0032
0.0041
263
0.0072
0.0031
0.0041
264
0.0071
0.0031
0.0040
265
0.0071
0.0031
0.0040
266
0.0070
0.0031
0.0040
267
0.0070
0.0030
0.0039
268
0.0069
0.0030
0.0039
269
0.0069
0.0030
0.0039
270
0.0068
0.0030
0.0038
271
0.0068
0.0030
0.0038
272
0.0067
0.0029
0.0038
273
0.0067
0.0029
0.0038
274
0.0066
0.0029
0.0037
275
0.0066
0.0029
0.0037
276
0.0065
0.0029
0.0037
277
0.0065
0.0028
0.0037
278
0.0065
0.0028
0.0036
279
0.0064
0.0028
0.0036
280
0.0064
0.0028
0.0036
281
0.0063
0.0028
0.0036
282
0.0063
0.0027
0.0035
283
0.0063
0.0027
0.0035
284
0.0062
0.0027
0.0035
285
0.0062
0.0027
0.0035
286
0.0061
0.0027
0.0035
287
0.0061
0.0027
0.0034
288
0.0061
0.0026
0.0034
-------------------------------------------------------------------- Total soil rain loss = 1.59(In)
Total effective rainfall = 2.31(In)
Peak flow rate in flood hydrograph = 12.80(CFS)
--------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 24 -
H O U
R S T 0 R M
R
u n o f
f
H y d r o g r a p h
-------------------------------------------------------------------- Hydrograph in
5 Minute intervals ((CFS))
-------------------------------------------------------------------- Time(h+m)
Volume Ac.Ft
Q(CFS)
0 5.0 10.0 15.0 20.0
----------------------------------------------------------------------- 0+ 5
0.0001
0.02 Q
0+10
0.0010
0.12 Q
0+15
0.0027
0.25 Q
0+20
0.0048
0.30 Q
0+25
0.0070
0.32 Q
0+30
0.0092
0.32 Q
0+35
0.0115
0.33 Q
0+40
0.0137
0.33 Q
0+45
0.0160
0.33 Q
0+50
0.0182
0.33 Q
0+55
0.0205
0.33 Q
1+ 0
0.0228
0.33 Q
1+ 5
0.0251
0.33 Q
1+10
0.0274
0.33 Q
1+15
0.0297
0.33 Q
1+20
0.0320
0.33 Q
1+25
0.0343
0.34 Q
1+30
0.0366
0.34 Q
1+35
0.0389
0.34 QV
1+40
0.0413
0.34 QV
1+45
0.0436
0.34 QV
1+50
0.0460
0.34 QV
1+55
0.0483
0.34 QV
2+ 0
0.0507
0.34 QV
2+ 5
0.0531
0.34 QV
2+10
0.0554
0.35 QV
2+15
0.0578
0.35 QV
2+20
0.0602
0.35 QV
2+25
0.0626
0.35 QV
2+30
0.0650
0.35 QV
2+35
0.0675
0.35 QV
2+40
0.0699
0.35 QV
2+45
0.0723
0.35 QV
2+50
0.0748
0.36 QV
2+55
0.0772
0.36 Q V
3+ 0
0.0797
0.36 Q V
3+ 5
0.0822
0.36 Q V
3+10
0.0846
0.36 Q V
3+15
0.0871
0.36 Q V
3+20
0.0896
0.36 Q V
3+25
0.0921
0.36 Q V
3+30
0.0946
0.37 Q V
3+35
0.0972
0.37 Q V
3+40
0.0997
0.37 Q V
3+45
0.1022
0.37 Q V
3+50
0.1048
0.37 Q V
3+55
0.1074
0.37 Q V
4+ 0
0.1099
0.37 Q V
4+ 5
0.1125
0.37 Q V
4+10
0.1151
0.38 Q V
4+15
0.1177
0.38 Q V
4+20
0.1203
0.38 Q V
4+25
0.1229
0.38 Q V
4+30
0.1256
0.38 Q V
4+35
0.1282
0.38 Q V
4+40
0.1309
0.39 Q V
4+45
0.1335
0.39 Q V
4+50
0.1362
0.39 Q V
4+55
0.1389
0.39 Q V
5+ 0
0.1416
0.39 Q V
5+ 5
0.1443
0.39 Q V
5+10
0.1470
0.39 Q V
5+15
0.1497
0.40 Q V
5+20
0.1525
0.40 Q V
5+25
0.1552
0.40 Q V
5+30
0.1580
0.40 Q V
5+35
0.1608
0.40 Q V
5+40
0.1636
0.40 Q V
5+45
0.1664
0.41 Q V
5+50
0.1692
0.41 Q V
5+55
0.1720
0.41 Q V
6+ 0
0.1749
0.41 Q V
6+ 5
0.1777
0.41 Q V
6+10
0.1806
0.42 Q V
6+15
0.1834
0.42 Q V
6+20
0.1863
0.42 Q V
6+25
0.1892
0.42 Q V
6+30
0.1922
0.42 Q V
6+35
0.1951
0.43 Q V
6+40
0.1980
0.43 Q V
6+45
0.2010
0.43 6+50
0.2040
0.43 6+55
0.2070
0.43 7+ 0
0.2100
0.44 7+ 5
0.2130
0.44 7+10
0.2160
0.44 7+15
0.2191
0.44 7+20
0.2222
0.45 7+25
0.2252
0.45 7+30
0.2283
0.45 7+35
0.2315
0.45 7+40
0.2346
0.45 7+45
0.2377
0.46 7+50
0.2409
0.46 7+55
0.2441
0.46 8+ 0
0.2473
0.47 8+ 5
0.2505
0.47 8+10
0.2537
0.47 8+15
0.2570
0.47 8+20
0.2603
0.48 8+25
0.2636
0.48 8+30
0.2669
0.48 8+35
0.2702
0.48 8+40
0.2736
0.49 8+45
0.2770
0.49 8+50
0.2804
0.49 8+55
0.2838
0.50 9+ 0
0.2872
0.50 9+ 5
0.2907
0.50 9+10
0.2942
0.51 9+15
0.2977
0.51 9+20
0.3012
0.51 9+25
0.3048
0.52 9+30
0.3083
0.52 9+35
0.3120
0.52 9+40
0.3156
0.53 9+45
0.3192
0.53 9+50
0.3229
0.53 9+55
0.3266
0.54 10+ 0
0.3304
0.54 10+ 5
0.3341
0.55 10+10
0.3379
0.55 10+15
0.3417
0.56 10+20
0.3456
0.56 10+25
0.3495
0.56 10+30
0.3534
0.57 10+35
0.3573
0.57 10+40
0.3613
0.58 10+45
0.3653
0.58 10+50
0.3694
0.59 4
M
4 M
4 �M
1Tj
10+55
0.3735
0.59 11+ 0
0.3776
0.60 11+ 5
0.3817
0.60 11+10
0.3859
0.61 11+15
0.3901
0.61 11+20
0.3944
0.62 11+25
0.3987
0.63 11+30
0.4031
0.63 11+35
0.4075
0.64 11+40
0.4119
0.64 11+45
0.4164
0.65 11+50
0.4209
0.66 11+55
0.4255
0.67 12+ 0
0.4301
0.67 12+ 5
0.4349
0.69 12+10
0.4399
0.73 12+15
0.4453
0.78 12+20
0.4509
0.81 12+25
0.4565
0.82 12+30
0.4623
0.83 12+35
0.4681
0.84 12+40
0.4739
0.85 12+45
0.4798
0.86 12+50
0.4858
0.87 12+55
0.4919
0.88 13+ 0
0.4981
0.89 13+ 5
0.5043
0.90 13+10
0.5106
0.92 13+15
0.5170
0.93 13+20
0.5235
0.94 13+25
0.5300
0.95 13+30
0.5367
0.97 13+35
0.5435
0.98 13+40
0.5504
1.00 13+45
0.5573
1.01 13+50
0.5644
1.03 13+55
0.5717
1.05 14+ 0
0.5790
1.07 14+ 5
0.5865
1.09 14+10
0.5941
1.11 14+15
0.6019
1.13 14+20
0.6099
1.16 14+25
0.6180
1.18 14+30
0.6263
1.21 14+35
0.6349
1.24 14+40
0.6436
1.27 14+45
0.6526
1.30 14+50
0.6618
1.34 14+55
0.6713
1.38 15+ 0
0.6811
1.43 VI
4 M
4 M
4 M
4 M
V
15+ 5
0.6913
1.47 Q
15+10
0.7018
1.53 Q
15+15
0.7128
1.59 Q
15+20
0.7242
1.66 Q
15+25
0.7361
1.72 Q
15+30
0.7476
1.68 Q
15+35
0.7587
1.61 Q
15+40
0.7703
1.68 Q
15+45
0.7829
1.84 Q
15+50
0.7972
2.08 Q
15+55
0.8140
2.43 Q
16+ 0
0.8355
3.13 16+ 5
0.8739
5.57 16+10
0.9543
11.68 16+15
1.0424
12.80 16+20
1.0866
6.41 16+25
1.1085
3.17 16+30
1.1233
2.16 Q
16+35
1.1366
1.93 Q
16+40
1.1481
1.67 Q
16+45
1.1587
1.54 Q
16+50
1.1686
1.44 Q
16+55
1.1779
1.35 Q
17+ 0
1.1867
1.28 Q
17+ 5
1.1951
1.21 Q
17+10
1.2030
1.16 Q
17+15
1.2107
1.11 Q
17+20
1.2181
1.07 Q
17+25
1.2252
1.03 Q
17+30
1.2321
1.00 Q
17+35
1.2388
0.97 IQ
17+40
1.2453
0.94 IQ
17+45
1.2516
0.92 IQ
17+50
1.2577
0.89 IQ
17+55
1.2638
0.87 IQ
18+ 0
1.2696
0.85 IQ
18+ 5
1.2753
0.83 IQ
18+10
1.2807
0.77 IQ
18+15
1.2856
0.71 IQ
18+20
1.2902
0.68 IQ
18+25
1.2948
0.66 IQ
18+30
1.2993
0.65 IQ
18+35
1.3036
0.63 IQ
18+40
1.3079
0.62 IQ
18+45
1.3121
0.61 IQ
18+50
1.3162
0.60 IQ
18+55
1.3203
0.59 IQ
19+ 0
1.3242
0.58 IQ
19+ 5
1.3282
0.57 IQ
19+10
1.3320
0.56 IQ
0 0
N
V
V
Q V
Q V
V
19+15
1.3358
0.55 19+20
1.3395
0.54 19+25
1.3432
0.54 19+30
1.3469
0.53 19+35
1.3504
0.52 19+40
1.3540
0.51 19+45
1.3575
0.51 19+50
1.3609
0.50 19+55
1.3643
0.49 20+ 0
1.3677
0.49 20+ 5
1.3710
0.48 20+10
1.3743
0.48 20+15
1.3775
0.47 20+20
1.3807
0.47 20+25
1.3839
0.46 20+30
1.3870
0.46 20+35
1.3901
0.45 20+40
1.3932
0.45 20+45
1.3962
0.44 20+50
1.3992
0.44 20+55
1.4022
0.43 21+ 0
1.4052
0.43 21+ 5
1.4081
0.42 21+10
1.4110
0.42 21+15
1.4138
0.42 21+20
1.4167
0.41 21+25
1.4195
0.41 21+30
1.4223
0.41 21+35
1.4250
0.40 21+40
1.4278
0.40 21+45
1.4305
0.39 21+50
1.4332
0.39 21+55
1.4359
0.39 22+ 0
1.4385
0.39 22+ 5
1.4412
0.38 22+10
1.4438
0.38 22+15
1.4464
0.38 22+20
1.4489
0.37 22+25
1.4515
0.37 22+30
1.4540
0.37 22+35
1.4566
0.37 22+40
1.4591
0.36 22+45
1.4615
0.36 22+50
1.4640
0.36 22+55
1.4664
0.36 23+ 0
1.4689
0.35 23+ 5
1.4713
0.35 23+10
1.4737
0.35 23+15
1.4761
0.35 23+20
1.4784
0.34 23+25
1.4808
0.34 Q I
I I VI
23+30
1.4831
0.34 Q I
I I VI
23+35
1.4854
0.34 Q I
I I VI
23+40
1.4877
0.33 Q I
I I VI
23+45
1.4900
0.33 Q I
I I VI
23+50
1.4923
0.33 Q I
I I VI
23+55
1.4946
0.33 Q I
I I VI
24+ 0
1.4968
0.33 Q I
I I VI
24+ 5
1.4989
0.31 Q I
I I VI
24+10
1.5003
0.20 Q I
I I VI
24+15
1.5008
0.07 Q I
I I VI
24+20
1.5009
0.02 Q I
I I VI
24+25
1.5010
0.01 Q I
I I VI
24+30
-----------------------------------------------------------------------
1.5010
0.00 Q I
I I VI
U n i t H y d r o g r a p h A n a l y s i s
Copyright (c) CIVILCADD/CIVILDESIGN, 1989 - 2018, Version 9.0 Study date 08/22/22
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ San Bernardino County Synthetic Unit Hydrology Method
Manual date - August 1986
Program License Serial Number 6481
--------------------------------------------------------------------- TTM 20372
Post Developmnet Unit Hydrograph - DA 1
100 yr
24 hr
Storm Event Year = 100
Antecedent Moisture Condition = 3
English (in -lb) Input Units Used
English Rainfall Data (Inches) Input Values Used
English Units used in output format
Area averaged rainfall intensity isohyetal data:
Sub -Area
Duration
Isohyetal
(Ac.)
(hours)
(In)
Rainfall
data for
year
10 7.81
1 0.83
-------------------------------------------------------------------- Rainfall
data for
year
2 7.81
6 1.34
-------------------------------------------------------------------- Rainfall
data for
year
2 7.81
24 2.48
-------------------------------------------------------------------- Rainfall
data for
year
100
7.81 1 1.36
--------------------------
Rainfall data for year 100
7.81 6 3.18
-------------------------------------------------------------------- Rainfall data for year 100
7.81 24 5.92
-------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ******** Area -averaged max loss rate, Fm ********
SCS curve SCS curve Area Area Fp(Fig C6) Ap Fm
No.(AMCII) NO.(AMC 3) (Ac.) Fraction (In/Hr) (dec.) (In/Hr)
32.0 52.0 7.81 1.000 0.785 0.400 0.314
Area -averaged adjusted loss rate Fm (In/Hr) = 0.314
********* Area -Averaged low loss rate fraction, Yb ********** Area Area
SCS CN
SCS CN
S Pervious
(Ac.) Fract
(AMC2)
(AMC3)
Yield Fr
3.12 0.400
32.0 52.0
9.23 0.211
4.69 0.600
98.0 98.0
0.20 0.960
Area -averaged catchment yield fraction, Y = 0.660
Area -averaged low loss fraction, Yb = 0.340
Direct entry of lag time by user
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Watershed area = 7.81(Ac.)
Catchment Lag time = 0.147 hours
Unit interval = 5.000 minutes
Unit interval percentage of lag time = 56.8440
Hydrograph baseflow = 0.00(CFS)
Average maximum watershed loss rate(Fm) = 0.314(In/Hr)
Average low loss rate fraction (Yb) = 0.340 (decimal)
VALLEY DEVELOPED S-Graph Selected
Computed peak 5-minute rainfall = 0.503(In)
Computed peak 30-minute rainfall = 1.031(In)
Specified peak 1-hour rainfall = 1.360(In)
Computed peak 3-hour rainfall = 2.289(In)
Specified peak 6-hour rainfall = 3.180(In)
Specified peak 24-hour rainfall = 5.920(In)
Rainfall depth area reduction factors:
Using a total area of 7.81(Ac.) (Ref: fig. E-4)
5-minute factor = 1.000 Adjusted rainfall = 0.503(In)
30-minute factor
= 1.000
Adjusted
rainfall =
1.030(In)
1-hour factor =
1.000
Adjusted
rainfall =
1.360(In)
3-hour factor =
1.000
Adjusted
rainfall =
2.289(In)
6-hour factor =
1.000
Adjusted
rainfall =
3.180(In)
24-hour factor =
---------------------------------------------------------------------
1.000
Adjusted
rainfall =
5.920(In)
U n i t H y d r o g r a p h
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Interval 'S' Graph Unit Hydrograph
Number Mean values ((CFS))
(K =
94.45 (CFS))
1 5.869
5.543
2 37.754
30.117
3 78.425
38.414
4 94.154
14.856
5 98.352
3.965
6 99.427
1.016
7 100.000
0.541
--------------------------------------------------------------------- Peak Unit
Adjusted mass
rainfall Unit rainfall
Number
(In)
(In)
1 0.5032
0.5032
2 0.6639
0.1608
3 0.7808
0.1169
4 0.8761
0.0952
5 0.9578
0.0818
6 1.0303
0.0725
7 1.0958
0.0655
8 1.1560
0.0601
9 1.2117
0.0558
10 1.2639
0.0522
11 1.3130
0.0491
12 1.3595
0.0465
13 1.4121
0.0526
14 1.4626
0.0505
15 1.5113
0.0487
16 1.5583
0.0470
17 1.6037
0.0455
18 1.6478
0.0441
19 1.6906
0.0428
20 1.7323
0.0416
21 1.7728
0.0406
22 1.8124
0.0396
23 1.8510
0.0386
24 1.8887
0.0377
25 1.9257
0.0369
26 1.9618
0.0362
27 1.9973
0.0354
28 2.0320
0.0348
29 2.0661
0.0341
30 2.0996
0.0335
31 2.1325
0.0329
32 2.1649
0.0324
33 2.1967
0.0318
34 2.2281
0.0313
35 2.2589
0.0308
36 2.2893
0.0304
37 2.3192
0.0299
38 2.3487
0.0295
39 2.3778
0.0291
40 2.4065
0.0287
41 2.4349
0.0283
42 2.4629
0.0280
43 2.4905
0.0276
44 2.5178
0.0273
45 2.5448
0.0270
46 2.5714
0.0267
47 2.5978
0.0264
48 2.6238
0.0261
49 2.6496
0.0258
50 2.6751
0.0255
51 2.7003
0.0252
52 2.7253
0.0250
53 2.7500
0.0247
54 2.7745
0.0245
55 2.7987
0.0242
56 2.8227
0.0240
57 2.8465
0.0238
58 2.8701
0.0236
59 2.8935
0.0234
60 2.9166
0.0231
61 2.9396
0.0229
62 2.9623
0.0227
63 2.9849
0.0226
64 3.0072
0.0224
65 3.0294
0.0222
66 3.0514
0.0220
67 3.0732
0.0218
68 3.0949
0.0217
69 3.1164
0.0215
70 3.1377
0.0213
71 3.1589
0.0212
72 3.1799
0.0210
73 3.1996
0.0197
74 3.2192
0.0196
75 3.2387
0.0194
76 3.2579
0.0193
77 3.2771
0.0191
78 3.2961
0.0190
79 3.3150
0.0189
80 3.3337
0.0187
81 3.3523
0.0186
82 3.3708
0.0185
83 3.3892
0.0184
84 3.4074
0.0182
85 3.4256
0.0181
86 3.4436
0.0180
87 3.4615
0.0179
88 3.4792
0.0178
89 3.4969
0.0177
90 3.5145
0.0176
91 3.5319
0.0175
92 3.5493
0.0173
93 3.5665
0.0172
94 3.5837
0.0171
95 3.6007
0.0170
96 3.6176
0.0169
97 3.6345
0.0168
98 3.6512
0.0167
99 3.6679
0.0167
100
3.6845
0.0166
101
3.7009
0.0165
102
3.7173
0.0164
103
3.7336
0.0163
104
3.7498
0.0162
105
3.7659
0.0161
106
3.7820
0.0160
107
3.7979
0.0160
108
3.8138
0.0159
109
3.8296
0.0158
110
3.8453
0.0157
111
3.8609
0.0156
112
3.8765
0.0156
113
3.8920
0.0155
114
3.9074
0.0154
115
3.9227
0.0153
116
3.9379
0.0153
117
3.9531
0.0152
118
3.9682
0.0151
119
3.9833
0.0150
120
3.9983
0.0150
121
4.0132
0.0149
122
4.0280
0.0148
123
4.0428
0.0148
124
4.0575
0.0147
125
4.0721
0.0146
126
4.0867
0.0146
127
4.1012
0.0145
128
4.1156
0.0144
129
4.1300
0.0144
130
4.1443
0.0143
131
4.1586
0.0143
132
4.1728
0.0142
133
4.1869
0.0141
134
4.2010
0.0141
135
4.2150
0.0140
136
4.2290
0.0140
137
4.2429
0.0139
138
4.2568
0.0139
139
4.2706
0.0138
140
4.2843
0.0137
141
4.2980
0.0137
142
4.3117
0.0136
143
4.3252
0.0136
144
4.3388
0.0135
145
4.3523
0.0135
146
4.3657
0.0134
147
4.3791
0.0134
148
4.3924
0.0133
149
4.4057
0.0133
150
4.4189
0.0132
151
4.4321
0.0132
152
4.4452
0.0131
153
4.4583
0.0131
154
4.4713
0.0130
155
4.4843
0.0130
156
4.4973
0.0129
157
4.5102
0.0129
158
4.5230
0.0129
159
4.5359
0.0128
160
4.5486
0.0128
161
4.5613
0.0127
162
4.5740
0.0127
163
4.5867
0.0126
164
4.5993
0.0126
165
4.6118
0.0126
166
4.6243
0.0125
167
4.6368
0.0125
168
4.6492
0.0124
169
4.6616
0.0124
170
4.6739
0.0123
171
4.6862
0.0123
172
4.6985
0.0123
173
4.7107
0.0122
174
4.7229
0.0122
175
4.7351
0.0121
176
4.7472
0.0121
177
4.7593
0.0121
178
4.7713
0.0120
179
4.7833
0.0120
180
4.7953
0.0120
181
4.8072
0.0119
182
4.8191
0.0119
183
4.8309
0.0119
184
4.8427
0.0118
185
4.8545
0.0118
186
4.8663
0.0117
187
4.8780
0.0117
188
4.8896
0.0117
189
4.9013
0.0116
190
4.9129
0.0116
191
4.9245
0.0116
192
4.9360
0.0115
193
4.9475
0.0115
194
4.9590
0.0115
195
4.9704
0.0114
196
4.9819
0.0114
197
4.9932
0.0114
198
5.0046
0.0113
199
5.0159
0.0113
200
5.0272
0.0113
201
5.0384
0.0113
202
5.0497
0.0112
203
5.0608
0.0112
204
5.0720
0.0112
205
5.0831
0.0111
206
5.0942
0.0111
207
5.1053
0.0111
208
5.1163
0.0110
209
5.1274
0.0110
210
5.1383
0.0110
211
5.1493
0.0110
212
5.1602
0.0109
213
5.1711
0.0109
214
5.1820
0.0109
215
5.1928
0.0108
216
5.2036
0.0108
217
5.2144
0.0108
218
5.2252
0.0108
219
5.2359
0.0107
220
5.2466
0.0107
221
5.2573
0.0107
222
5.2680
0.0107
223
5.2786
0.0106
224
5.2892
0.0106
225
5.2998
0.0106
226
5.3103
0.0105
227
5.3208
0.0105
228
5.3313
0.0105
229
5.3418
0.0105
230
5.3522
0.0104
231
5.3627
0.0104
232
5.3730
0.0104
233
5.3834
0.0104
234
5.3938
0.0103
235
5.4041
0.0103
236
5.4144
0.0103
237
5.4247
0.0103
238
5.4349
0.0102
239
5.4451
0.0102
240
5.4553
0.0102
241
5.4655
0.0102
242
5.4757
0.0102
243
5.4858
0.0101
244
5.4959
0.0101
245
5.5060
0.0101
246
5.5161
0.0101
247
5.5261
0.0100
248
5.5361
0.0100
249
5.5461
0.0100
250
5.5561
0.0100
251
5.5660
0.0100
252
5.5760
0.0099
253
5.5859
0.0099
254
5.5958
0.0099
255
5.6056
0.0099
256
5.6155
0.0098
257
5.6253
0.0098
258
5.6351
0.0098
259
5.6449
0.0098
260
5.6546
0.0098
261
5.6644
0.0097
262
5.6741
0.0097
263
5.6838
0.0097
264
5.6935
0.0097
265
5.7031
0.0097
266
5.7128
0.0096
267
5.7224
0.0096
268
5.7320
0.0096
269
5.7416
0.0096
270
5.7511
0.0096
271
5.7607
0.0095
272
5.7702
0.0095
273
5.7797
0.0095
274
5.7892
0.0095
275
5.7986
0.0095
276
5.8081
0.0094
277
5.8175
0.0094
278
5.8269
0.0094
279
5.8363
0.0094
280
5.8457
0.0094
281
5.8550
0.0094
282
5.8643
0.0093
283
5.8736
0.0093
284
5.8829
0.0093
285
5.8922
0.0093
286
5.9015
0.0093
287
5.9107
0.0092
288
5.9199
0.0092
Unit
Unit
Period
Rainfall
(number)
(In)
Unit Effective
Soil -Loss Rainfall
(In) (In)
1 0.0092
0.0031
0.0061
2 0.0092
0.0031
0.0061
3 0.0093
0.0032
0.0061
4 0.0093
0.0032
0.0061
5 0.0093
0.0032
0.0062
6 0.0094
0.0032
0.0062
7 0.0094
0.0032
0.0062
8 0.0094
0.0032
0.0062
9 0.0094
0.0032
0.0062
10 0.0095
0.0032
0.0062
11 0.0095
0.0032
0.0063
12 0.0095
0.0032
0.0063
13 0.0096
0.0032
0.0063
14 0.0096
0.0033
0.0063
15 0.0096
0.0033
0.0063
16 0.0096
0.0033
0.0064
17 0.0097
0.0033
0.0064
18 0.0097
0.0033
0.0064
19 0.0097
0.0033
0.0064
20 0.0098
0.0033
0.0064
21 0.0098
0.0033
0.0065
22 0.0098
0.0033
0.0065
23 0.0099
0.0034
0.0065
24 0.0099
0.0034
0.0065
25 0.0099
0.0034
0.0066
26 0.0100
0.0034
0.0066
27 0.0100
0.0034
0.0066
28 0.0100
0.0034
0.0066
29 0.0101
0.0034
0.0066
30 0.0101
0.0034
0.0067
31 0.0101
0.0034
0.0067
32 0.0102
0.0035
0.0067
33 0.0102
0.0035
0.0067
34 0.0102
0.0035
0.0068
35 0.0103
0.0035
0.0068
36 0.0103
0.0035
0.0068
37 0.0103
0.0035
0.0068
38 0.0104
0.0035
0.0068
39 0.0104
0.0035
0.0069
40 0.0104
0.0035
0.0069
41 0.0105
0.0036
0.0069
42 0.0105
0.0036
0.0069
43 0.0106
0.0036
0.0070
44 0.0106
0.0036
0.0070
45 0.0107
0.0036
0.0070
46 0.0107
0.0036
0.0070
47 0.0107
0.0036
0.0071
48 0.0108
0.0037
0.0071
49 0.0108
0.0037
0.0071
50 0.0108
0.0037
0.0072
51 0.0109
0.0037
0.0072
52 0.0109
0.0037
0.0072
53 0.0110
0.0037
0.0073
54 0.0110
0.0037
0.0073
55 0.0111
0.0038
0.0073
56 0.0111
0.0038
0.0073
57 0.0112
0.0038
0.0074
58 0.0112
0.0038
0.0074
59 0.0113
0.0038
0.0074
60 0.0113
0.0038
0.0074
61 0.0113
0.0039
0.0075
62 0.0114
0.0039
0.0075
63 0.0114
0.0039
0.0076
64 0.0115
0.0039
0.0076
65 0.0115
0.0039
0.0076
66 0.0116
0.0039
0.0076
67 0.0116
0.0040
0.0077
68 0.0117
0.0040
0.0077
69 0.0117
0.0040
0.0078
70 0.0118
0.0040
0.0078
71 0.0119
0.0040
0.0078
72 0.0119
0.0040
0.0078
73 0.0120
0.0041
0.0079
74 0.0120
0.0041
0.0079
75 0.0121
0.0041
0.0080
76 0.0121
0.0041
0.0080
77 0.0122
0.0041
0.0080
78 0.0122
0.0042
0.0081
79 0.0123
0.0042
0.0081
80 0.0123
0.0042
0.0081
81 0.0124
0.0042
0.0082
82 0.0125
0.0042
0.0082
83 0.0126
0.0043
0.0083
84 0.0126
0.0043
0.0083
85 0.0127
0.0043
0.0084
86 0.0127
0.0043
0.0084
87 0.0128
0.0044
0.0085
88 0.0129
0.0044
0.0085
89 0.0129
0.0044
0.0085
90 0.0130
0.0044
0.0086
91 0.0131
0.0044
0.0086
92 0.0131
0.0045
0.0087
93 0.0132
0.0045
0.0087
94 0.0133
0.0045
0.0088
95 0.0134
0.0045
0.0088
96 0.0134
0.0046
0.0089
97 0.0135
0.0046
0.0089
98 0.0136
0.0046
0.0090
99 0.0137
0.0047
0.0090
100
0.0137
0.0047
0.0091
101
0.0139
0.0047
0.0091
102
0.0139
0.0047
0.0092
103
0.0140
0.0048
0.0093
104
0.0141
0.0048
0.0093
105
0.0142
0.0048
0.0094
106
0.0143
0.0048
0.0094
107
0.0144
0.0049
0.0095
108
0.0144
0.0049
0.0095
109
0.0146
0.0050
0.0096
110
0.0146
0.0050
0.0097
111
0.0148
0.0050
0.0097
112
0.0148
0.0050
0.0098
113
0.0150
0.0051
0.0099
114
0.0150
0.0051
0.0099
115
0.0152
0.0052
0.0100
116
0.0153
0.0052
0.0101
117
0.0154
0.0052
0.0102
118
0.0155
0.0053
0.0102
119
0.0156
0.0053
0.0103
120
0.0157
0.0053
0.0104
121
0.0159
0.0054
0.0105
122
0.0160
0.0054
0.0105
123
0.0161
0.0055
0.0106
124
0.0162
0.0055
0.0107
125
0.0164
0.0056
0.0108
126
0.0165
0.0056
0.0109
127
0.0167
0.0057
0.0110
128
0.0167
0.0057
0.0111
129
0.0169
0.0058
0.0112
130
0.0170
0.0058
0.0112
131
0.0172
0.0059
0.0114
132
0.0173
0.0059
0.0115
133
0.0176
0.0060
0.0116
134
0.0177
0.0060
0.0117
135
0.0179
0.0061
0.0118
136
0.0180
0.0061
0.0119
137
0.0182
0.0062
0.0120
138
0.0184
0.0062
0.0121
139
0.0186
0.0063
0.0123
140
0.0187
0.0064
0.0124
141
0.0190
0.0065
0.0126
142
0.0191
0.0065
0.0126
143
0.0194
0.0066
0.0128
144
0.0196
0.0067
0.0129
145
0.0210
0.0071
0.0139
146
0.0212
0.0072
0.0140
147
0.0215
0.0073
0.0142
148
0.0217
0.0074
0.0143
149
0.0220
0.0075
0.0145
150
0.0222
0.0075
0.0146
151
0.0226
0.0077
0.0149
152
0.0227
0.0077
0.0150
153
0.0231
0.0079
0.0153
154
0.0234
0.0079
0.0154
155
0.0238
0.0081
0.0157
156
0.0240
0.0082
0.0159
157
0.0245
0.0083
0.0162
158
0.0247
0.0084
0.0163
159
0.0252
0.0086
0.0167
160
0.0255
0.0087
0.0168
161
0.0261
0.0089
0.0172
162
0.0264
0.0090
0.0174
163
0.0270
0.0092
0.0178
164
0.0273
0.0093
0.0180
165
0.0280
0.0095
0.0185
166
0.0283
0.0096
0.0187
167
0.0291
0.0099
0.0192
168
0.0295
0.0100
0.0195
169
0.0304
0.0103
0.0201
170
0.0308
0.0105
0.0204
171
0.0318
0.0108
0.0210
172
0.0324
0.0110
0.0214
173
0.0335
0.0114
0.0221
174
0.0341
0.0116
0.0225
175
0.0354
0.0120
0.0234
176
0.0362
0.0123
0.0239
177
0.0377
0.0128
0.0249
178
0.0386
0.0131
0.0255
179
0.0406
0.0138
0.0268
180
0.0416
0.0142
0.0275
181
0.0441
0.0150
0.0291
182
0.0455
0.0154
0.0300
183
0.0487
0.0165
0.0321
184
0.0505
0.0172
0.0334
185
0.0465
0.0158
0.0307
186
0.0491
0.0167
0.0324
187
0.0558
0.0190
0.0368
188
0.0601
0.0204
0.0397
189
0.0725
0.0246
0.0478
190
0.0818
0.0262
0.0556
191
0.1169
0.0262
0.0907
192
0.1608
0.0262
0.1346
193
0.5032
0.0262
0.4770
194
0.0952
0.0262
0.0691
195
0.0655
0.0223
0.0433
196
0.0522
0.0177
0.0344
197
0.0526
0.0179
0.0347
198
0.0470
0.0160
0.0310
199
0.0428
0.0145
0.0283
200
0.0396
0.0134
0.0261
201
0.0369
0.0126
0.0244
202
0.0348
0.0118
0.0229
203
0.0329
0.0112
0.0217
204
0.0313
0.0106
0.0207
205
0.0299
0.0102
0.0198
206
0.0287
0.0098
0.0190
207
0.0276
0.0094
0.0182
208
0.0267
0.0091
0.0176
209
0.0258
0.0088
0.0170
210
0.0250
0.0085
0.0165
211
0.0242
0.0082
0.0160
212
0.0236
0.0080
0.0156
213
0.0229
0.0078
0.0151
214
0.0224
0.0076
0.0148
215
0.0218
0.0074
0.0144
216
0.0213
0.0072
0.0141
217
0.0197
0.0067
0.0130
218
0.0193
0.0066
0.0127
219
0.0189
0.0064
0.0125
220
0.0185
0.0063
0.0122
221
0.0181
0.0062
0.0120
222
0.0178
0.0060
0.0117
223
0.0175
0.0059
0.0115
224
0.0171
0.0058
0.0113
225
0.0168
0.0057
0.0111
226
0.0166
0.0056
0.0109
227
0.0163
0.0055
0.0108
228
0.0160
0.0054
0.0106
229
0.0158
0.0054
0.0104
230
0.0156
0.0053
0.0103
231
0.0153
0.0052
0.0101
232
0.0151
0.0051
0.0100
233
0.0149
0.0051
0.0098
234
0.0147
0.0050
0.0097
235
0.0145
0.0049
0.0096
236
0.0143
0.0049
0.0095
237
0.0141
0.0048
0.0093
238
0.0140
0.0047
0.0092
239
0.0138
0.0047
0.0091
240
0.0136
0.0046
0.0090
241
0.0135
0.0046
0.0089
242
0.0133
0.0045
0.0088
243
0.0132
0.0045
0.0087
244
0.0130
0.0044
0.0086
245
0.0129
0.0044
0.0085
246
0.0128
0.0043
0.0084
247
0.0126
0.0043
0.0083
248
0.0125
0.0043
0.0083
249
0.0124
0.0042
0.0082
250
0.0123
0.0042
0.0081
251
0.0121
0.0041
0.0080
252
0.0120
0.0041
0.0079
253
0.0119
0.0041
0.0079
254
0.0118
0.0040
0.0078
255
0.0117
0.0040
0.0077
256
0.0116
0.0039
0.0077
257
0.0115
0.0039
0.0076
258
0.0114
0.0039
0.0075
259
0.0113
0.0038
0.0075
260
0.0112
0.0038
0.0074
261
0.0111
0.0038
0.0073
262
0.0110
0.0038
0.0073
263
0.0110
0.0037
0.0072
264
0.0109
0.0037
0.0072
265
0.0108
0.0037
0.0071
266
0.0107
0.0036
0.0071
267
0.0106
0.0036
0.0070
268
0.0105
0.0036
0.0070
269
0.0105
0.0036
0.0069
270
0.0104
0.0035
0.0069
271
0.0103
0.0035
0.0068
272
0.0102
0.0035
0.0068
273
0.0102
0.0035
0.0067
274
0.0101
0.0034
0.0067
275
0.0100
0.0034
0.0066
276
0.0100
0.0034
0.0066
277
0.0099
0.0034
0.0065
278
0.0098
0.0033
0.0065
279
0.0098
0.0033
0.0065
280
0.0097
0.0033
0.0064
281
0.0097
0.0033
0.0064
282
0.0096
0.0033
0.0063
283
0.0095
0.0032
0.0063
284
0.0095
0.0032
0.0063
285
0.0094
0.0032
0.0062
286
0.0094
0.0032
0.0062
287
0.0093
0.0032
0.0061
288
0.0093
0.0031
0.0061
-------------------------------------------------------------------- Total soil rain loss = 1.82(In)
Total effective rainfall = 4.10(In)
Peak flow rate in flood hydrograph = 23.08(CFS)
--------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 24 -
H O U
R S T 0 R M
R
u n o f
f
H y d r o g r a p h
-------------------------------------------------------------------- Hydrograph in
5 Minute intervals ((CFS))
-------------------------------------------------------------------- Time(h+m)
Volume Ac.Ft
Q(CFS)
0 7.5 15.0 22.5 30.0
----------------------------------------------------------------------- 0+ 5
0.0002
0.03 Q
0+10
0.0017
0.22 Q
0+15
0.0048
0.45 Q
0+20
0.0086
0.54 Q
0+25
0.0125
0.57 Q
0+30
0.0165
0.58 Q
0+35
0.0205
0.58 Q
0+40
0.0245
0.58 Q
0+45
0.0285
0.59 Q
0+50
0.0326
0.59 Q
0+55
0.0366
0.59 Q
1+ 0
0.0407
0.59 Q
1+ 5
0.0448
0.59 Q
1+10
0.0489
0.59 Q
1+15
0.0530
0.60 Q
1+20
0.0571
0.60 Q
1+25
0.0612
0.60 Q
1+30
0.0654
0.60 Q
1+35
0.0695
0.60 QV
1+40
0.0737
0.61 QV
1+45
0.0779
0.61 QV
1+50
0.0821
0.61 QV
1+55
0.0863
0.61 QV
2+ 0
0.0905
0.61 QV
2+ 5
0.0947
0.62 QV
2+10
0.0990
0.62 QV
2+15
0.1032
0.62 QV
2+20
0.1075
0.62 QV
2+25
0.1118
0.62 QV
2+30
0.1161
0.63 QV
2+35
0.1204
0.63 QV
2+40
0.1248
0.63 QV
2+45
0.1291
0.63 QV
2+50
0.1335
0.63 Q V
2+55
0.1379
0.64 Q V
3+ 0
0.1423
0.64 Q V
3+ 5
0.1467
0.64 Q V
3+10
0.1511
0.64 Q V
3+15
0.1556
0.65 Q V
3+20
0.1600
0.65 Q V
3+25
0.1645
0.65 Q V
3+30
0.1690
0.65 Q V
3+35
0.1735
0.65 Q V
3+40
0.1780
0.66 Q V
3+45
0.1825
0.66 Q V
3+50
0.1871
0.66 Q V
3+55
0.1917
0.66 Q V
4+ 0
0.1963
0.67 Q V
4+ 5
0.2009
0.67 Q V
4+10
0.2055
0.67 Q V
4+15
0.2101
0.67 Q V
4+20
0.2148
0.68 Q V
4+25
0.2195
0.68 Q V
4+30
0.2242
0.68 Q V
4+35
0.2289
0.68 Q V
4+40
0.2336
0.69 Q V
4+45
0.2384
0.69 Q V
4+50
0.2432
0.69 Q V
4+55
0.2479
0.70 Q V
5+ 0
0.2528
0.70 Q V
5+ 5
0.2576
0.70 Q V
5+10
0.2624
0.70 Q V
5+15
0.2673
0.71 Q V
5+20
0.2722
0.71 Q V
5+25
0.2771
0.71 Q V
5+30
0.2821
0.72 Q V
5+35
0.2870
0.72 Q V
5+40
0.2920
0.72 Q V
5+45
0.2970
0.73 Q V
5+50
0.3020
0.73 Q V
5+55
0.3071
0.73 Q V
6+ 0
0.3121
0.74 Q V
6+ 5
0.3172
0.74 Q V
6+10
0.3223
0.74 Q V
6+15
0.3275
0.75 Q V
6+20
0.3326
0.75 Q V
6+25
0.3378
0.75 IQ V
6+30
0.3430
0.76 IQ V
6+35
0.3482
0.76 IQ V
6+40
0.3535
0.76 IQ V
6+45
0.3588
0.77 Q
6+50
0.3641
0.77 IQ
6+55
0.3694
0.77 IQ
7+ 0
0.3748
0.78 IQ
7+ 5
0.3802
0.78 IQ
7+10
0.3856
0.79 IQ
7+15
0.3910
0.79 IQ
7+20
0.3965
0.79 IQ
7+25
0.4020
0.80 IQ
7+30
0.4075
0.80 IQ
7+35
0.4131
0.81 IQ
7+40
0.4187
0.81 IQ
7+45
0.4243
0.82 IQ
7+50
0.4300
0.82 IQ
7+55
0.4356
0.82 IQ
8+ 0
0.4414
0.83 IQ
8+ 5
0.4471
0.83 IQ
8+10
0.4529
0.84 IQ
8+15
0.4587
0.84 IQ
8+20
0.4645
0.85 IQ
8+25
0.4704
0.85 IQ
8+30
0.4763
0.86 IQ
8+35
0.4823
0.86 IQ
8+40
0.4883
0.87 IQ
8+45
0.4943
0.87 IQ
8+50
0.5003
0.88 IQ
8+55
0.5064
0.89 IQ
9+ 0
0.5126
0.89 IQ
9+ 5
0.5188
0.90 IQ
9+10
0.5250
0.90 IQ
9+15
0.5312
0.91 IQ
9+20
0.5375
0.91 IQ
9+25
0.5439
0.92 IQ
9+30
0.5503
0.93 IQ
9+35
0.5567
0.93 IQ
9+40
0.5632
0.94 IQ
9+45
0.5697
0.95 IQ
9+50
0.5762
0.95 IQ
9+55
0.5829
0.96 IQ
10+ 0
0.5895
0.97 IQ
10+ 5
0.5962
0.97 IQ
10+10
0.6030
0.98 IQ
10+15
0.6098
0.99 IQ
10+20
0.6167
1.00 IQ
10+25
0.6236
1.01 IQ
10+30
0.6306
1.01 IQ
10+35
0.6376
1.02 IQ
10+40
0.6447
1.03 IQ
10+45
0.6519
1.04 IQ
10+50
0.6591
1.05 IQ
4 M
4 M
4 M
4 10+55
0.6663
1.06 11+ 0
0.6737
1.07 11+ 5
0.6811
1.08 11+10
0.6886
1.08 11+15
0.6961
1.09 11+20
0.7037
1.10 11+25
0.7114
1.12 11+30
0.7191
1.13 11+35
0.7270
1.14 11+40
0.7349
1.15 11+45
0.7429
1.16 11+50
0.7510
1.17 11+55
0.7591
1.19 12+ 0
0.7674
1.20 12+ 5
0.7757
1.22 12+10
0.7844
1.25 12+15
0.7933
1.30 12+20
0.8024
1.32 12+25
0.8116
1.34 12+30
0.8209
1.36 12+35
0.8304
1.37 12+40
0.8400
1.39 12+45
0.8496
1.41 12+50
0.8595
1.42 12+55
0.8694
1.44 13+ 0
0.8795
1.46 13+ 5
0.8897
1.48 13+10
0.9000
1.50 13+15
0.9105
1.53 13+20
0.9212
1.55 13+25
0.9321
1.57 13+30
0.9431
1.60 13+35
0.9543
1.62 13+40
0.9656
1.65 13+45
0.9772
1.68 13+50
0.9890
1.71 13+55
1.0010
1.74 14+ 0
1.0133
1.78 14+ 5
1.0258
1.81 14+10
1.0385
1.85 14+15
1.0516
1.89 14+20
1.0649
1.94 14+25
1.0786
1.99 14+30
1.0926
2.04 14+35
1.1070
2.09 14+40
1.1218
2.15 14+45
1.1370
2.21 14+50
1.1527
2.28 14+55
1.1690
2.36 15+ 0
1.1858
2.44 VI
M
4 4
M
4 4
15+ 5
1.2032
2.53 Q
15+10
1.2213
2.64 Q
15+15
1.2403
2.75 Q
15+20
1.2602
2.89 Q
15+25
1.2809
3.01 Q
15+30
1.3018
3.03 Q
15+35
1.3226
3.03 Q
15+40
1.3448
3.21 Q
15+45
1.3691
3.53 Q
15+50
1.3966
4.00 Q
15+55
1.4297
4.80 Q
16+ 0
1.4747
6.54 16+ 5
1.5522
11.26 16+10
1.7007
21.56 16+15
1.8597
23.08 16+20
1.9416
11.89 16+25
1.9828
5.99 Q
16+30
2.0105
4.01 Q
16+35
2.0342
3.44 Q
16+40
2.0543
2.92 Q
16+45
2.0726
2.66 Q
16+50
2.0896
2.46 Q
16+55
2.1054
2.30 Q
17+ 0
2.1203
2.16 Q
17+ 5
2.1344
2.05 Q
17+10
2.1478
1.95 Q
17+15
2.1606
1.86 Q
17+20
2.1729
1.79 Q
17+25
2.1847
1.72 Q
17+30
2.1961
1.66 Q
17+35
2.2072
1.60 Q
17+40
2.2179
1.55 Q
17+45
2.2283
1.51 Q
17+50
2.2384
1.47 IQ
17+55
2.2482
1.43 IQ
18+ 0
2.2578
1.39 IQ
18+ 5
2.2671
1.35 IQ
18+10
2.2760
1.30 IQ
18+15
2.2846
1.24 IQ
18+20
2.2929
1.20 IQ
18+25
2.3010
1.18 IQ
18+30
2.3089
1.15 IQ
18+35
2.3167
1.13 IQ
18+40
2.3243
1.11 IQ
18+45
2.3318
1.09 IQ
18+50
2.3391
1.07 IQ
18+55
2.3463
1.05 IQ
19+ 0
2.3534
1.03 IQ
19+ 5
2.3604
1.01 IQ
19+10
2.3673
1.00 IQ
QI
Iv
Q
V
V
Q
V Q
Q
VI
V�
V
V
I
I
v
19+15
2.3741
0.98 19+20
2.3807
0.97 19+25
2.3873
0.95 19+30
2.3938
0.94 19+35
2.4002
0.93 19+40
2.4065
0.92 19+45
2.4127
0.90 19+50
2.4188
0.89 19+55
2.4249
0.88 20+ 0
2.4309
0.87 20+ 5
2.4368
0.86 20+10
2.4427
0.85 20+15
2.4484
0.84 20+20
2.4542
0.83 20+25
2.4598
0.82 20+30
2.4654
0.81 20+35
2.4709
0.80 20+40
2.4764
0.80 20+45
2.4818
0.79 20+50
2.4872
0.78 20+55
2.4925
0.77 21+ 0
2.4978
0.76 21+ 5
2.5030
0.76 21+10
2.5081
0.75 21+15
2.5133
0.74 21+20
2.5183
0.74 21+25
2.5233
0.73 21+30
2.5283
0.72 21+35
2.5333
0.72 21+40
2.5382
0.71 21+45
2.5430
0.70 21+50
2.5478
0.70 21+55
2.5526
0.69 22+ 0
2.5573
0.69 22+ 5
2.5620
0.68 22+10
2.5667
0.68 22+15
2.5713
0.67 22+20
2.5759
0.67 22+25
2.5805
0.66 22+30
2.5850
0.66 22+35
2.5895
0.65 22+40
2.5940
0.65 22+45
2.5984
0.64 22+50
2.6028
0.64 22+55
2.6071
0.63 23+ 0
2.6115
0.63 23+ 5
2.6158
0.63 23+10
2.6201
0.62 23+15
2.6243
0.62 23+20
2.6285
0.61 23+25
2.6327
0.61 Q I
I I VI
23+30
2.6369
0.61 Q I
I I VI
23+35
2.6411
0.60 Q I
I I VI
23+40
2.6452
0.60 Q I
I I VI
23+45
2.6493
0.59 Q I
I I VI
23+50
2.6533
0.59 Q I
I I VI
23+55
2.6574
0.59 Q I
I I VI
24+ 0
2.6614
0.58 Q I
I I VI
24+ 5
2.6652
0.55 Q I
I I VI
24+10
2.6676
0.36 Q I
I I VI
24+15
2.6685
0.12 Q I
I I VI
24+20
2.6687
0.03 Q I
I I VI
24+25
2.6688
0.01 Q I
I I VI
24+30
-----------------------------------------------------------------------
2.6688
0.00 Q I
I I V
U n i t H y d r o g r a p h A n a l y s i s
Copyright (c) CIVILCADD/CIVILDESIGN, 1989 - 2018, Version 9.0 Study date 08/22/22
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ San Bernardino County Synthetic Unit Hydrology Method
Manual date - August 1986
Program License Serial Number 6481
--------------------------------------------------------------------- TTM 20372
Post Development Unit Hydrograph - DA 2
2 yr
24 hr
Storm Event Year = 2
Antecedent Moisture Condition = 1
English (in -lb) Input Units Used
English Rainfall Data (Inches) Input Values Used
English Units used in output format
Area averaged rainfall intensity isohyetal data:
Sub -Area
Duration
Isohyetal
(Ac.)
(hours)
(In)
Rainfall
data for
year
10 6.99
1 0.83
-------------------------------------------------------------------- Rainfall
data for
year
2 6.99
6 1.34
-------------------------------------------------------------------- Rainfall
data for
year
2 6.99
24 2.48
-------------------------------------------------------------------- Rainfall
data for
year
100
6.99 1 1.36
--------------------------
Rainfall data for year 100
6.99 6 3.18
-------------------------------------------------------------------- Rainfall data for year 100
6.99 24 5.92
-------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ******** Area -averaged max loss rate, Fm ********
SCS curve SCS curve Area Area Fp(Fig C6) Ap Fm
No.(AMCII) NO.(AMC 1) (Ac.) Fraction (In/Hr) (dec.) (In/Hr)
32.0 16.6 6.99 1.000 1.000 0.400 0.400
Area -averaged adjusted loss rate Fm (In/Hr) = 0.400
********* Area -Averaged low loss rate fraction, Yb ********** Area Area
SCS CN
SCS CN
S Pervious
(Ac.) Fract
(AMC2)
(AMC1)
Yield Fr
2.80 0.400
32.0 16.6
12.40 0.000
4.19 0.600
98.0 98.0
0.20 0.908
Area -averaged catchment yield fraction, Y = 0.545
Area -averaged low loss fraction, Yb = 0.455
Direct entry of lag time by user
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Watershed area = 6.99(Ac.)
Catchment Lag time = 0.144 hours
Unit interval = 5.000 minutes
Unit interval percentage of lag time = 57.9509
Hydrograph baseflow = 0.00(CFS)
Average maximum watershed loss rate(Fm) = 0.400(In/Hr)
Average low loss rate fraction (Yb) = 0.455 (decimal)
VALLEY DEVELOPED S-Graph Selected
Computed peak 5-minute rainfall = 0.169(In)
Computed peak 30-minute rainfall = 0.346(In)
Specified peak 1-hour rainfall = 0.456(In)
Computed peak 3-hour rainfall = 0.883(In)
Specified peak 6-hour rainfall = 1.340(In)
Specified peak 24-hour rainfall = 2.480(In)
Rainfall depth area reduction factors:
Using a total area of 6.99(Ac.) (Ref: fig. E-4)
5-minute factor = 1.000 Adjusted rainfall = 0.169(In)
30-minute factor
= 1.000
Adjusted
rainfall =
0.346(In)
1-hour factor =
1.000
Adjusted
rainfall =
0.456(In)
3-hour factor =
1.000
Adjusted
rainfall =
0.883(In)
6-hour factor =
1.000
Adjusted
rainfall =
1.340(In)
24-hour factor =
---------------------------------------------------------------------
1.000
Adjusted
rainfall =
2.480(In)
U n i t H y d r o g r a p h
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Interval 'S' Graph Unit Hydrograph
Number Mean values ((CFS))
(K =
84.54 (CFS))
1 6.093
5.151
2 39.108
27.910
3 79.650
34.272
4 94.671
12.698
5 98.475
3.216
6 99.531
0.893
7 100.000
0.396
--------------------------------------------------------------------- Peak Unit
Adjusted mass
rainfall Unit rainfall
Number
(In)
(In)
1 0.1688
0.1688
2 0.2227
0.0539
3 0.2619
0.0392
4 0.2938
0.0319
5 0.3213
0.0274
6 0.3456
0.0243
7 0.3676
0.0220
8 0.3877
0.0202
9 0.4064
0.0187
10 0.4239
0.0175
11 0.4404
0.0165
12 0.4560
0.0156
13 0.4785
0.0225
14 0.5003
0.0218
15 0.5215
0.0212
16 0.5422
0.0207
17 0.5623
0.0201
18 0.5820
0.0197
19 0.6012
0.0192
20 0.6201
0.0188
21 0.6386
0.0185
22 0.6567
0.0181
23 0.6745
0.0178
24 0.6920
0.0175
25 0.7092
0.0172
26 0.7261
0.0169
27 0.7428
0.0167
28 0.7592
0.0164
29 0.7754
0.0162
30 0.7914
0.0160
31 0.8072
0.0158
32 0.8227
0.0156
33 0.8381
0.0154
34 0.8533
0.0152
35 0.8683
0.0150
36 0.8832
0.0148
37 0.8978
0.0147
38 0.9124
0.0145
39 0.9267
0.0144
40 0.9409
0.0142
41 0.9550
0.0141
42 0.9690
0.0139
43 0.9828
0.0138
44 0.9965
0.0137
45 1.0100
0.0136
46 1.0235
0.0134
47 1.0368
0.0133
48 1.0500
0.0132
49 1.0631
0.0131
50 1.0761
0.0130
51 1.0890
0.0129
52 1.1018
0.0128
53 1.1145
0.0127
54 1.1271
0.0126
55 1.1396
0.0125
56 1.1520
0.0124
57 1.1643
0.0123
58 1.1766
0.0122
59 1.1887
0.0122
60 1.2008
0.0121
61 1.2128
0.0120
62 1.2247
0.0119
63 1.2366
0.0118
64 1.2483
0.0118
65 1.2600
0.0117
66 1.2716
0.0116
67 1.2832
0.0116
68 1.2947
0.0115
69 1.3061
0.0114
70 1.3175
0.0114
71 1.3287
0.0113
72 1.3400
0.0112
73 1.3482
0.0082
74 1.3564
0.0082
75 1.3645
0.0081
76 1.3725
0.0080
77 1.3805
0.0080
78 1.3885
0.0079
79 1.3963
0.0079
80 1.4042
0.0078
81 1.4119
0.0078
82 1.4196
0.0077
83 1.4273
0.0077
84 1.4349
0.0076
85 1.4425
0.0076
86 1.4500
0.0075
87 1.4574
0.0075
88 1.4649
0.0074
89 1.4722
0.0074
90 1.4795
0.0073
91 1.4868
0.0073
92 1.4941
0.0072
93 1.5013
0.0072
94 1.5084
0.0071
95 1.5155
0.0071
96 1.5226
0.0071
97 1.5296
0.0070
98 1.5366
0.0070
99 1.5435
0.0069
100
1.5504
0.0069
101
1.5573
0.0069
102
1.5641
0.0068
103
1.5709
0.0068
104
1.5777
0.0068
105
1.5844
0.0067
106
1.5911
0.0067
107
1.5977
0.0066
108
1.6043
0.0066
109
1.6109
0.0066
110
1.6174
0.0065
111
1.6240
0.0065
112
1.6304
0.0065
113
1.6369
0.0064
114
1.6433
0.0064
115
1.6497
0.0064
116
1.6560
0.0064
117
1.6624
0.0063
118
1.6687
0.0063
119
1.6749
0.0063
120
1.6812
0.0062
121
1.6874
0.0062
122
1.6935
0.0062
123
1.6997
0.0062
124
1.7058
0.0061
125
1.7119
0.0061
126
1.7180
0.0061
127
1.7240
0.0060
128
1.7300
0.0060
129
1.7360
0.0060
130
1.7420
0.0060
131
1.7479
0.0059
132
1.7538
0.0059
133
1.7597
0.0059
134
1.7656
0.0059
135
1.7714
0.0058
136
1.7772
0.0058
137
1.7830
0.0058
138
1.7888
0.0058
139
1.7946
0.0057
140
1.8003
0.0057
141
1.8060
0.0057
142
1.8116
0.0057
143
1.8173
0.0057
144
1.8229
0.0056
145
1.8285
0.0056
146
1.8341
0.0056
147
1.8397
0.0056
148
1.8453
0.0055
149
1.8508
0.0055
150
1.8563
0.0055
151
1.8618
0.0055
152
1.8672
0.0055
153
1.8727
0.0054
154
1.8781
0.0054
155
1.8835
0.0054
156
1.8889
0.0054
157
1.8943
0.0054
158
1.8996
0.0053
159
1.9049
0.0053
160
1.9103
0.0053
161
1.9155
0.0053
162
1.9208
0.0053
163
1.9261
0.0053
164
1.9313
0.0052
165
1.9365
0.0052
166
1.9417
0.0052
167
1.9469
0.0052
168
1.9521
0.0052
169
1.9572
0.0052
170
1.9624
0.0051
171
1.9675
0.0051
172
1.9726
0.0051
173
1.9777
0.0051
174
1.9827
0.0051
175
1.9878
0.0051
176
1.9928
0.0050
177
1.9979
0.0050
178
2.0029
0.0050
179
2.0079
0.0050
180
2.0128
0.0050
181
2.0178
0.0050
182
2.0227
0.0049
183
2.0277
0.0049
184
2.0326
0.0049
185
2.0375
0.0049
186
2.0423
0.0049
187
2.0472
0.0049
188
2.0521
0.0049
189
2.0569
0.0048
190
2.0617
0.0048
191
2.0665
0.0048
192
2.0713
0.0048
193
2.0761
0.0048
194
2.0809
0.0048
195
2.0857
0.0048
196
2.0904
0.0047
197
2.0951
0.0047
198
2.0998
0.0047
199
2.1045
0.0047
200
2.1092
0.0047
201
2.1139
0.0047
202
2.1186
0.0047
203
2.1232
0.0047
204
2.1279
0.0046
205
2.1325
0.0046
206
2.1371
0.0046
207
2.1417
0.0046
208
2.1463
0.0046
209
2.1509
0.0046
210
2.1554
0.0046
211
2.1600
0.0046
212
2.1645
0.0045
213
2.1691
0.0045
214
2.1736
0.0045
215
2.1781
0.0045
216
2.1826
0.0045
217
2.1870
0.0045
218
2.1915
0.0045
219
2.1960
0.0045
220
2.2004
0.0044
221
2.2049
0.0044
222
2.2093
0.0044
223
2.2137
0.0044
224
2.2181
0.0044
225
2.2225
0.0044
226
2.2269
0.0044
227
2.2312
0.0044
228
2.2356
0.0044
229
2.2399
0.0043
230
2.2443
0.0043
231
2.2486
0.0043
232
2.2529
0.0043
233
2.2572
0.0043
234
2.2615
0.0043
235
2.2658
0.0043
236
2.2701
0.0043
237
2.2744
0.0043
238
2.2786
0.0043
239
2.2829
0.0042
240
2.2871
0.0042
241
2.2913
0.0042
242
2.2956
0.0042
243
2.2998
0.0042
244
2.3040
0.0042
245
2.3081
0.0042
246
2.3123
0.0042
247
2.3165
0.0042
248
2.3207
0.0042
249
2.3248
0.0042
250
2.3289
0.0041
251
2.3331
0.0041
252
2.3372
0.0041
253
2.3413
0.0041
254
2.3454
0.0041
255
2.3495
0.0041
256
2.3536
0.0041
257
2.3577
0.0041
258
2.3617
0.0041
259
2.3658
0.0041
260
2.3699
0.0041
261
2.3739
0.0040
262
2.3779
0.0040
263
2.3820
0.0040
264
2.3860
0.0040
265
2.3900
0.0040
266
2.3940
0.0040
267
2.3980
0.0040
268
2.4020
0.0040
269
2.4059
0.0040
270
2.4099
0.0040
271
2.4139
0.0040
272
2.4178
0.0040
273
2.4218
0.0039
274
2.4257
0.0039
275
2.4296
0.0039
276
2.4335
0.0039
277
2.4375
0.0039
278
2.4414
0.0039
279
2.4453
0.0039
280
2.4491
0.0039
281
2.4530
0.0039
282
2.4569
0.0039
283
2.4608
0.0039
284
2.4646
0.0039
285
2.4685
0.0038
286
2.4723
0.0038
287
2.4762
0.0038
288
2.4800
0.0038
Unit
Unit
Period
Rainfall
(number)
(In)
Unit Effective
Soil -Loss Rainfall
(In) (In)
1 0.0038
0.0017
0.0021
2 0.0038
0.0017
0.0021
3 0.0038
0.0018
0.0021
4 0.0039
0.0018
0.0021
5 0.0039
0.0018
0.0021
6 0.0039
0.0018
0.0021
7 0.0039
0.0018
0.0021
8 0.0039
0.0018
0.0021
9 0.0039
0.0018
0.0021
10 0.0039
0.0018
0.0021
11 0.0039
0.0018
0.0021
12 0.0040
0.0018
0.0022
13 0.0040
0.0018
0.0022
14 0.0040
0.0018
0.0022
15 0.0040
0.0018
0.0022
16 0.0040
0.0018
0.0022
17 0.0040
0.0018
0.0022
18 0.0040
0.0018
0.0022
19 0.0040
0.0018
0.0022
20 0.0041
0.0018
0.0022
21 0.0041
0.0019
0.0022
22 0.0041
0.0019
0.0022
23 0.0041
0.0019
0.0022
24 0.0041
0.0019
0.0022
25 0.0041
0.0019
0.0022
26 0.0041
0.0019
0.0023
27 0.0042
0.0019
0.0023
28 0.0042
0.0019
0.0023
29 0.0042
0.0019
0.0023
30 0.0042
0.0019
0.0023
31 0.0042
0.0019
0.0023
32 0.0042
0.0019
0.0023
33 0.0042
0.0019
0.0023
34 0.0042
0.0019
0.0023
35 0.0043
0.0019
0.0023
36 0.0043
0.0019
0.0023
37 0.0043
0.0020
0.0023
38 0.0043
0.0020
0.0023
39 0.0043
0.0020
0.0024
40 0.0043
0.0020
0.0024
41 0.0044
0.0020
0.0024
42 0.0044
0.0020
0.0024
43 0.0044
0.0020
0.0024
44 0.0044
0.0020
0.0024
45 0.0044
0.0020
0.0024
46 0.0044
0.0020
0.0024
47 0.0045
0.0020
0.0024
48 0.0045
0.0020
0.0024
49 0.0045
0.0020
0.0024
50 0.0045
0.0021
0.0025
51 0.0045
0.0021
0.0025
52 0.0045
0.0021
0.0025
53 0.0046
0.0021
0.0025
54 0.0046
0.0021
0.0025
55 0.0046
0.0021
0.0025
56 0.0046
0.0021
0.0025
57 0.0046
0.0021
0.0025
58 0.0047
0.0021
0.0025
59 0.0047
0.0021
0.0025
60 0.0047
0.0021
0.0026
61 0.0047
0.0021
0.0026
62 0.0047
0.0022
0.0026
63 0.0048
0.0022
0.0026
64 0.0048
0.0022
0.0026
65 0.0048
0.0022
0.0026
66 0.0048
0.0022
0.0026
67 0.0048
0.0022
0.0026
68 0.0049
0.0022
0.0026
69 0.0049
0.0022
0.0027
70 0.0049
0.0022
0.0027
71 0.0049
0.0022
0.0027
72 0.0049
0.0023
0.0027
73 0.0050
0.0023
0.0027
74 0.0050
0.0023
0.0027
75 0.0050
0.0023
0.0027
76 0.0050
0.0023
0.0027
77 0.0051
0.0023
0.0028
78 0.0051
0.0023
0.0028
79 0.0051
0.0023
0.0028
80 0.0051
0.0023
0.0028
81 0.0052
0.0024
0.0028
82 0.0052
0.0024
0.0028
83 0.0052
0.0024
0.0028
84 0.0052
0.0024
0.0029
85 0.0053
0.0024
0.0029
86 0.0053
0.0024
0.0029
87 0.0053
0.0024
0.0029
88 0.0053
0.0024
0.0029
89 0.0054
0.0025
0.0029
90 0.0054
0.0025
0.0029
91 0.0054
0.0025
0.0030
92 0.0055
0.0025
0.0030
93 0.0055
0.0025
0.0030
94 0.0055
0.0025
0.0030
95 0.0056
0.0025
0.0030
96 0.0056
0.0025
0.0030
97 0.0056
0.0026
0.0031
98 0.0057
0.0026
0.0031
99 0.0057
0.0026
0.0031
100
0.0057
0.0026
0.0031
101
0.0058
0.0026
0.0031
102
0.0058
0.0026
0.0032
103
0.0058
0.0027
0.0032
104
0.0059
0.0027
0.0032
105
0.0059
0.0027
0.0032
106
0.0059
0.0027
0.0032
107
0.0060
0.0027
0.0033
108
0.0060
0.0027
0.0033
109
0.0061
0.0028
0.0033
110
0.0061
0.0028
0.0033
111
0.0062
0.0028
0.0033
112
0.0062
0.0028
0.0034
113
0.0062
0.0028
0.0034
114
0.0063
0.0029
0.0034
115
0.0063
0.0029
0.0034
116
0.0064
0.0029
0.0035
117
0.0064
0.0029
0.0035
118
0.0064
0.0029
0.0035
119
0.0065
0.0030
0.0035
120
0.0065
0.0030
0.0036
121
0.0066
0.0030
0.0036
122
0.0066
0.0030
0.0036
123
0.0067
0.0031
0.0037
124
0.0068
0.0031
0.0037
125
0.0068
0.0031
0.0037
126
0.0069
0.0031
0.0037
127
0.0069
0.0032
0.0038
128
0.0070
0.0032
0.0038
129
0.0071
0.0032
0.0038
130
0.0071
0.0032
0.0039
131
0.0072
0.0033
0.0039
132
0.0072
0.0033
0.0039
133
0.0073
0.0033
0.0040
134
0.0074
0.0034
0.0040
135
0.0075
0.0034
0.0041
136
0.0075
0.0034
0.0041
137
0.0076
0.0035
0.0041
138
0.0077
0.0035
0.0042
139
0.0078
0.0035
0.0042
140
0.0078
0.0036
0.0043
141
0.0079
0.0036
0.0043
142
0.0080
0.0036
0.0044
143
0.0081
0.0037
0.0044
144
0.0082
0.0037
0.0044
145
0.0112
0.0051
0.0061
146
0.0113
0.0051
0.0061
147
0.0114
0.0052
0.0062
148
0.0115
0.0052
0.0063
149
0.0116
0.0053
0.0063
150
0.0117
0.0053
0.0064
151
0.0118
0.0054
0.0064
152
0.0119
0.0054
0.0065
153
0.0121
0.0055
0.0066
154
0.0122
0.0055
0.0066
155
0.0123
0.0056
0.0067
156
0.0124
0.0057
0.0068
157
0.0126
0.0057
0.0069
158
0.0127
0.0058
0.0069
159
0.0129
0.0059
0.0070
160
0.0130
0.0059
0.0071
161
0.0132
0.0060
0.0072
162
0.0133
0.0061
0.0073
163
0.0136
0.0062
0.0074
164
0.0137
0.0062
0.0075
165
0.0139
0.0063
0.0076
166
0.0141
0.0064
0.0077
167
0.0144
0.0065
0.0078
168
0.0145
0.0066
0.0079
169
0.0148
0.0068
0.0081
170
0.0150
0.0068
0.0082
171
0.0154
0.0070
0.0084
172
0.0156
0.0071
0.0085
173
0.0160
0.0073
0.0087
174
0.0162
0.0074
0.0088
175
0.0167
0.0076
0.0091
176
0.0169
0.0077
0.0092
177
0.0175
0.0080
0.0095
178
0.0178
0.0081
0.0097
179
0.0185
0.0084
0.0101
180
0.0188
0.0086
0.0103
181
0.0197
0.0090
0.0107
182
0.0201
0.0092
0.0110
183
0.0212
0.0097
0.0115
184
0.0218
0.0099
0.0119
185
0.0156
0.0071
0.0085
186
0.0165
0.0075
0.0090
187
0.0187
0.0085
0.0102
188
0.0202
0.0092
0.0110
189
0.0243
0.0111
0.0132
190
0.0274
0.0125
0.0149
191
0.0392
0.0179
0.0214
192
0.0539
0.0246
0.0294
193
0.1688
0.0333
0.1354
194
0.0319
0.0145
0.0174
195
0.0220
0.0100
0.0120
196
0.0175
0.0080
0.0095
197
0.0225
0.0102
0.0123
198
0.0207
0.0094
0.0112
199
0.0192
0.0088
0.0105
200
0.0181
0.0083
0.0099
201
0.0172
0.0078
0.0094
202
0.0164
0.0075
0.0089
203
0.0158
0.0072
0.0086
204
0.0152
0.0069
0.0083
205
0.0147
0.0067
0.0080
206
0.0142
0.0065
0.0077
207
0.0138
0.0063
0.0075
208
0.0134
0.0061
0.0073
209
0.0131
0.0060
0.0071
210
0.0128
0.0058
0.0070
211
0.0125
0.0057
0.0068
212
0.0122
0.0056
0.0067
213
0.0120
0.0055
0.0065
214
0.0118
0.0054
0.0064
215
0.0116
0.0053
0.0063
216
0.0114
0.0052
0.0062
217
0.0082
0.0037
0.0045
218
0.0080
0.0037
0.0044
219
0.0079
0.0036
0.0043
220
0.0077
0.0035
0.0042
221
0.0076
0.0034
0.0041
222
0.0074
0.0034
0.0040
223
0.0073
0.0033
0.0040
224
0.0071
0.0033
0.0039
225
0.0070
0.0032
0.0038
226
0.0069
0.0031
0.0038
227
0.0068
0.0031
0.0037
228
0.0067
0.0030
0.0036
229
0.0066
0.0030
0.0036
230
0.0065
0.0030
0.0035
231
0.0064
0.0029
0.0035
232
0.0063
0.0029
0.0034
233
0.0062
0.0028
0.0034
234
0.0061
0.0028
0.0033
235
0.0060
0.0028
0.0033
236
0.0060
0.0027
0.0032
237
0.0059
0.0027
0.0032
238
0.0058
0.0026
0.0032
239
0.0057
0.0026
0.0031
240
0.0057
0.0026
0.0031
241
0.0056
0.0026
0.0031
242
0.0055
0.0025
0.0030
243
0.0055
0.0025
0.0030
244
0.0054
0.0025
0.0030
245
0.0054
0.0024
0.0029
246
0.0053
0.0024
0.0029
247
0.0053
0.0024
0.0029
248
0.0052
0.0024
0.0028
249
0.0052
0.0023
0.0028
250
0.0051
0.0023
0.0028
251
0.0051
0.0023
0.0028
252
0.0050
0.0023
0.0027
253
0.0050
0.0023
0.0027
254
0.0049
0.0022
0.0027
255
0.0049
0.0022
0.0027
256
0.0048
0.0022
0.0026
257
0.0048
0.0022
0.0026
258
0.0047
0.0022
0.0026
259
0.0047
0.0021
0.0026
260
0.0047
0.0021
0.0025
261
0.0046
0.0021
0.0025
262
0.0046
0.0021
0.0025
263
0.0046
0.0021
0.0025
264
0.0045
0.0021
0.0025
265
0.0045
0.0020
0.0024
266
0.0044
0.0020
0.0024
267
0.0044
0.0020
0.0024
268
0.0044
0.0020
0.0024
269
0.0043
0.0020
0.0024
270
0.0043
0.0020
0.0024
271
0.0043
0.0020
0.0023
272
0.0043
0.0019
0.0023
273
0.0042
0.0019
0.0023
274
0.0042
0.0019
0.0023
275
0.0042
0.0019
0.0023
276
0.0041
0.0019
0.0023
277
0.0041
0.0019
0.0022
278
0.0041
0.0019
0.0022
279
0.0041
0.0018
0.0022
280
0.0040
0.0018
0.0022
281
0.0040
0.0018
0.0022
282
0.0040
0.0018
0.0022
283
0.0040
0.0018
0.0022
284
0.0039
0.0018
0.0021
285
0.0039
0.0018
0.0021
286
0.0039
0.0018
0.0021
287
0.0039
0.0018
0.0021
288
0.0038
0.0017
0.0021
-------------------------------------------------------------------- Total soil rain loss = 1.09(In)
Total effective rainfall = 1.39(In)
Peak flow rate in flood hydrograph = 5.65(CFS)
--------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 24 -
H O U
R S T 0 R M
R
u n o f
f
H y d r o g r a p h
-------------------------------------------------------------------- Hydrograph in
5 Minute intervals ((CFS))
-------------------------------------------------------------------- Time(h+m)
Volume Ac.Ft
Q(CFS)
0 2.5 5.0 7.5 10.0
----------------------------------------------------------------------- 0+ 5
0.0001
0.01 Q
0+10
0.0005
0.07 Q
0+15
0.0015
0.14 Q
0+20
0.0027
0.17 Q
0+25
0.0039
0.17 Q
0+30
0.0051
0.18 Q
0+35
0.0063
0.18 Q
0+40
0.0075
0.18 Q
0+45
0.0088
0.18 Q
0+50
0.0100
0.18 Q
0+55
0.0113
0.18 Q
1+ 0
0.0125
0.18 Q
1+ 5
0.0138
0.18 Q
1+10
0.0150
0.18 Q
1+15
0.0163
0.18 Q
1+20
0.0175
0.18 Q
1+25
0.0188
0.18 Q
1+30
0.0201
0.18 Q
1+35
0.0213
0.18 QV
1+40
0.0226
0.19 QV
1+45
0.0239
0.19 QV
1+50
0.0252
0.19 QV
1+55
0.0265
0.19 QV
2+ 0
0.0278
0.19 QV
2+ 5
0.0291
0.19 QV
2+10
0.0304
0.19 QV
2+15
0.0317
0.19 QV
2+20
0.0330
0.19 QV
2+25
0.0343
0.19 QV
2+30
0.0356
0.19 QV
2+35
0.0370
0.19 QV
2+40
0.0383
0.19 QV
2+45
0.0396
0.19 QV
2+50
0.0410
0.19 Q
V
2+55
0.0423
0.20 Q
V
3+ 0
0.0437
0.20 Q
V
3+ 5
0.0450
0.20 Q
V
3+10
0.0464
0.20 Q
V
3+15
0.0477
0.20 Q
V
3+20
0.0491
0.20 Q
V
3+25
0.0505
0.20 Q
V
3+30
0.0518
0.20 Q
V
3+35
0.0532
0.20 Q
V
3+40
0.0546
0.20 Q
V
3+45
0.0560
0.20 Q
V
3+50
0.0574
0.20 Q
V
3+55
0.0588
0.20 Q
V
4+ 0
0.0602
0.20 Q
V
4+ 5
0.0616
0.21 Q
V
4+10
0.0630
0.21 Q
V
4+15
0.0645
0.21 Q
V
4+20
0.0659
0.21 Q
V
4+25
0.0673
0.21 Q
V
4+30
0.0688
0.21 Q
V
4+35
0.0702
0.21 Q
V
4+40
0.0717
0.21 Q
V
4+45
0.0731
0.21 Q
V
4+50
0.0746
0.21 Q
V
4+55
0.0761
0.21 Q
V
5+ 0
0.0775
0.21 Q
V
5+ 5
0.0790
0.22 Q
V
5+10
0.0805
0.22 Q
V
5+15
0.0820
0.22 Q
V
5+20
0.0835
0.22 Q
V
5+25
0.0850
0.22 Q
V
5+30
0.0865
0.22 Q
V
5+35
0.0881
0.22 Q
V
5+40
0.0896
0.22 Q
V
5+45
0.0911
0.22 Q
V
5+50
0.0927
0.22 Q
V
5+55
0.0942
0.22 Q
V
6+ 0
0.0958
0.23 Q
V
6+ 5
0.0973
0.23 Q
V
6+10
0.0989
0.23 Q
V
6+15
0.1005
0.23 Q
V
6+20
0.1021
0.23 Q
V
6+25
0.1037
0.23 Q
V
6+30
0.1053
0.23 Q
V
6+35
0.1069
0.23 Q
V
6+40
0.1085
0.23 Q
V
6+45
0.1101
0.24 6+50
0.1117
0.24 6+55
0.1134
0.24 7+ 0
0.1150
0.24 7+ 5
0.1167
0.24 7+10
0.1183
0.24 7+15
0.1200
0.24 7+20
0.1217
0.24 7+25
0.1234
0.25 7+30
0.1251
0.25 7+35
0.1268
0.25 7+40
0.1285
0.25 7+45
0.1302
0.25 7+50
0.1320
0.25 7+55
0.1337
0.25 8+ 0
0.1355
0.25 8+ 5
0.1372
0.26 8+10
0.1390
0.26 8+15
0.1408
0.26 8+20
0.1426
0.26 8+25
0.1444
0.26 8+30
0.1462
0.26 8+35
0.1480
0.27 8+40
0.1499
0.27 8+45
0.1517
0.27 8+50
0.1536
0.27 8+55
0.1555
0.27 9+ 0
0.1574
0.27 9+ 5
0.1593
0.28 9+10
0.1612
0.28 9+15
0.1631
0.28 9+20
0.1650
0.28 9+25
0.1670
0.28 9+30
0.1689
0.29 9+35
0.1709
0.29 9+40
0.1729
0.29 9+45
0.1749
0.29 9+50
0.1769
0.29 9+55
0.1790
0.30 10+ 0
0.1810
0.30 10+ 5
0.1831
0.30 10+10
0.1852
0.30 10+15
0.1873
0.30 10+20
0.1894
0.31 10+25
0.1915
0.31 10+30
0.1937
0.31 10+35
0.1958
0.31 10+40
0.1980
0.32 10+45
0.2002
0.32 10+50
0.2024
0.32 4
M
4 M
4 �M
1Tj
10+55
0.2047
0.33 11+ 0
0.2069
0.33 11+ 5
0.2092
0.33 11+10
0.2115
0.33 11+15
0.2138
0.34 11+20
0.2162
0.34 11+25
0.2185
0.34 11+30
0.2209
0.35 11+35
0.2233
0.35 11+40
0.2258
0.35 11+45
0.2282
0.36 11+50
0.2307
0.36 11+55
0.2332
0.37 12+ 0
0.2358
0.37 12+ 5
0.2384
0.38 12+10
0.2414
0.43 12+15
0.2448
0.49 12+20
0.2483
0.51 12+25
0.2519
0.52 12+30
0.2555
0.53 12+35
0.2592
0.54 12+40
0.2630
0.54 12+45
0.2667
0.55 12+50
0.2705
0.55 12+55
0.2743
0.56 13+ 0
0.2782
0.56 13+ 5
0.2821
0.57 13+10
0.2861
0.57 13+15
0.2901
0.58 13+20
0.2941
0.59 13+25
0.2982
0.59 13+30
0.3023
0.60 13+35
0.3065
0.61 13+40
0.3108
0.62 13+45
0.3151
0.62 13+50
0.3194
0.63 13+55
0.3238
0.64 14+ 0
0.3283
0.65 14+ 5
0.3329
0.66 14+10
0.3375
0.67 14+15
0.3422
0.68 14+20
0.3470
0.70 14+25
0.3519
0.71 14+30
0.3569
0.72 14+35
0.3619
0.74 14+40
0.3671
0.75 14+45
0.3724
0.77 14+50
0.3778
0.79 14+55
0.3834
0.81 15+ 0
0.3891
0.83 4
M
4 M
15+ 5
0.3950
0.85 Q
15+10
0.4010
0.88 Q
15+15
0.4073
0.91 Q
15+20
0.4137
0.94 Q
15+25
0.4203
0.96 Q
15+30
0.4264
0.89 Q
15+35
0.4319
0.80 Q
15+40
0.4375
0.81 Q
15+45
0.4436
0.88 Q
15+50
0.4504
0.99 Q
15+55
0.4584
1.16 Q
16+ 0
0.4686
1.48 Q
16+ 5
0.4858
2.50 1 QI
16+10
0.5216
5.21 16+15
0.5606
5.65 16+20
0.5800
2.82 IQ
16+25
0.5898
1.43 Q
16+30
0.5972
1.07 Q
16+35
0.6042
1.02 Q
16+40
0.6106
0.93 Q
16+45
0.6166
0.88 Q
16+50
0.6223
0.83 Q
16+55
0.6278
0.79 Q
17+ 0
0.6330
0.75 Q
17+ 5
0.6379
0.72 Q
17+10
0.6427
0.70 Q
17+15
0.6474
0.67 Q
17+20
0.6519
0.65 Q
17+25
0.6562
0.63 Q
17+30
0.6605
0.62 Q
17+35
0.6646
0.60 Q
17+40
0.6687
0.59 Q
17+45
0.6726
0.57 Q
17+50
0.6765
0.56 Q
17+55
0.6803
0.55 Q
18+ 0
0.6840
0.54 Q
18+ 5
0.6876
0.52 Q
18+10
0.6908
0.47 IQ 1
18+15
0.6936
0.41 IQ 1
18+20
0.6962
0.38 IQ 1
18+25
0.6987
0.36 IQ 1
18+30
0.7012
0.35 IQ 1
18+35
0.7036
0.35 IQ 1
18+40
0.7059
0.34 IQ 1
18+45
0.7082
0.33 IQ 1
18+50
0.7105
0.33 IQ 1
18+55
0.7127
0.32 IQ 1
19+ 0
0.7149
0.32 IQ 1
19+ 5
0.7170
0.31 IQ 1
19+10
0.7191
0.31 IQ
VI
VI
V
V
V
IV
IV
IV
IV
V
V
V
I V
V
Q V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
19+15
0.7212
0.30 19+20
0.7233
0.30 19+25
0.7253
0.29 19+30
0.7273
0.29 19+35
0.7292
0.29 19+40
0.7312
0.28 19+45
0.7331
0.28 19+50
0.7350
0.27 19+55
0.7368
0.27 20+ 0
0.7387
0.27 20+ 5
0.7405
0.26 20+10
0.7423
0.26 20+15
0.7441
0.26 20+20
0.7458
0.25 20+25
0.7475
0.25 20+30
0.7493
0.25 20+35
0.7510
0.25 20+40
0.7526
0.24 20+45
0.7543
0.24 20+50
0.7560
0.24 20+55
0.7576
0.24 21+ 0
0.7592
0.23 21+ 5
0.7608
0.23 21+10
0.7624
0.23 21+15
0.7640
0.23 21+20
0.7655
0.23 21+25
0.7671
0.22 21+30
0.7686
0.22 21+35
0.7701
0.22 21+40
0.7716
0.22 21+45
0.7731
0.22 21+50
0.7746
0.21 21+55
0.7760
0.21 22+ 0
0.7775
0.21 22+ 5
0.7789
0.21 22+10
0.7803
0.21 22+15
0.7818
0.21 22+20
0.7832
0.20 22+25
0.7846
0.20 22+30
0.7860
0.20 22+35
0.7873
0.20 22+40
0.7887
0.20 22+45
0.7901
0.20 22+50
0.7914
0.20 22+55
0.7927
0.19 23+ 0
0.7941
0.19 23+ 5
0.7954
0.19 23+10
0.7967
0.19 23+15
0.7980
0.19 23+20
0.7993
0.19 23+25
0.8006
0.19 Q I
I I VI
23+30
0.8019
0.19 Q I
I I VI
23+35
0.8031
0.18 Q I
I I VI
23+40
0.8044
0.18 Q I
I I VI
23+45
0.8057
0.18 Q I
I I VI
23+50
0.8069
0.18 Q I
I I VI
23+55
0.8081
0.18 Q I
I I VI
24+ 0
0.8094
0.18 Q I
I I VI
24+ 5
0.8105
0.17 Q I
I I VI
24+10
0.8113
0.11 Q I
I I VI
24+15
0.8115
0.04 Q I
I I VI
24+20
0.8116
0.01 Q I
I I VI
24+25
0.8116
0.00 Q I
I I VI
24+30
-----------------------------------------------------------------------
0.8116
0.00 Q I
I I VI
U n i t H y d r o g r a p h A n a l y s i s
Copyright (c) CIVILCADD/CIVILDESIGN, 1989 - 2018, Version 9.0 Study date 08/22/22
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ San Bernardino County Synthetic Unit Hydrology Method
Manual date - August 1986
Program License Serial Number 6481
--------------------------------------------------------------------- TTM 20372
Post Development Unit Hydrograph - DA 2
10 yr
24 hr
Storm Event Year = 10
Antecedent Moisture Condition = 2
English (in -lb) Input Units Used
English Rainfall Data (Inches) Input Values Used
English Units used in output format
Area averaged rainfall intensity isohyetal data:
Sub -Area
Duration
Isohyetal
(Ac.)
(hours)
(In)
Rainfall
data for
year
10 6.99
1 0.83
-------------------------------------------------------------------- Rainfall
data for
year
2 6.99
6 1.34
-------------------------------------------------------------------- Rainfall
data for
year
2 6.99
24 2.48
-------------------------------------------------------------------- Rainfall
data for
year
100
6.99 1 1.36
--------------------------
Rainfall data for year 100
6.99 6 3.18
-------------------------------------------------------------------- Rainfall data for year 100
6.99 24 5.92
-------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ******** Area -averaged max loss rate, Fm ********
SCS curve SCS curve Area Area Fp(Fig C6) Ap Fm
No.(AMCII) NO.(AMC 2) (Ac.) Fraction (In/Hr) (dec.) (In/Hr)
32.0 32.0 6.99 1.000 0.978 0.400 0.391
Area -averaged adjusted loss rate Fm (In/Hr) = 0.391
********* Area -Averaged low loss rate fraction, Yb ********** Area Area
SCS CN
SCS CN
S Pervious
(Ac.) Fract
(AMC2)
(AMC2)
Yield Fr
2.80 0.400
32.0 32.0
19.48 0.000
4.19 0.600
98.0 98.0
0.20 0.940
Area -averaged catchment yield fraction, Y = 0.564
Area -averaged low loss fraction, Yb = 0.436
Direct entry of lag time by user
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Watershed area = 6.99(Ac.)
Catchment Lag time = 0.144 hours
Unit interval = 5.000 minutes
Unit interval percentage of lag time = 57.9509
Hydrograph baseflow = 0.00(CFS)
Average maximum watershed loss rate(Fm) = 0.391(In/Hr)
Average low loss rate fraction (Yb) = 0.436 (decimal)
VALLEY DEVELOPED S-Graph Selected
Computed peak 5-minute rainfall = 0.306(In)
Computed peak 30-minute rainfall = 0.628(In)
Specified peak 1-hour rainfall = 0.828(In)
Computed peak 3-hour rainfall = 1.464(In)
Specified peak 6-hour rainfall = 2.097(In)
Specified peak 24-hour rainfall = 3.895(In)
Rainfall depth area reduction factors:
Using a total area of 6.99(Ac.) (Ref: fig. E-4)
5-minute factor = 1.000 Adjusted rainfall = 0.306(In)
30-minute factor
= 1.000
Adjusted
rainfall =
0.627(In)
1-hour factor =
1.000
Adjusted
rainfall =
0.828(In)
3-hour factor =
1.000
Adjusted
rainfall =
1.464(In)
6-hour factor =
1.000
Adjusted
rainfall =
2.097(In)
24-hour factor =
---------------------------------------------------------------------
1.000
Adjusted
rainfall =
3.895(In)
U n i t H y d r o g r a p h
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Interval 'S' Graph Unit Hydrograph
Number Mean values ((CFS))
(K =
84.54 (CFS))
1 6.093
5.151
2 39.108
27.910
3 79.650
34.272
4 94.671
12.698
5 98.475
3.216
6 99.531
0.893
7 100.000
0.396
--------------------------------------------------------------------- Peak Unit
Adjusted mass
rainfall Unit rainfall
Number
(In)
(In)
1 0.3063
0.3063
2 0.4042
0.0979
3 0.4754
0.0712
4 0.5334
0.0580
5 0.5832
0.0498
6 0.6273
0.0441
7 0.6672
0.0399
8 0.7038
0.0366
9 0.7378
0.0340
10 0.7695
0.0318
11 0.7994
0.0299
12 0.8277
0.0283
13 0.8628
0.0351
14 0.8967
0.0338
15 0.9293
0.0327
16 0.9610
0.0316
17 0.9917
0.0307
18 1.0215
0.0299
19 1.0506
0.0291
20 1.0790
0.0283
21 1.1066
0.0277
22 1.1337
0.0270
23 1.1601
0.0265
24 1.1860
0.0259
25 1.2114
0.0254
26 1.2363
0.0249
27 1.2608
0.0244
28 1.2848
0.0240
29 1.3084
0.0236
30 1.3316
0.0232
31 1.3544
0.0228
32 1.3769
0.0225
33 1.3991
0.0222
34 1.4209
0.0218
35 1.4425
0.0215
36 1.4637
0.0212
37 1.4847
0.0209
38 1.5053
0.0207
39 1.5258
0.0204
40 1.5459
0.0202
41 1.5659
0.0199
42 1.5855
0.0197
43 1.6050
0.0195
44 1.6243
0.0193
45 1.6433
0.0190
46 1.6622
0.0188
47 1.6808
0.0186
48 1.6993
0.0185
49 1.7175
0.0183
50 1.7356
0.0181
51 1.7535
0.0179
52 1.7713
0.0177
53 1.7889
0.0176
54 1.8063
0.0174
55 1.8236
0.0173
56 1.8407
0.0171
57 1.8577
0.0170
58 1.8745
0.0168
59 1.8912
0.0167
60 1.9077
0.0166
61 1.9242
0.0164
62 1.9405
0.0163
63 1.9566
0.0162
64 1.9727
0.0160
65 1.9886
0.0159
66 2.0044
0.0158
67 2.0201
0.0157
68 2.0357
0.0156
69 2.0512
0.0155
70 2.0665
0.0154
71 2.0818
0.0153
72 2.0969
0.0152
73 2.1099
0.0130
74 2.1228
0.0129
75 2.1355
0.0128
76 2.1482
0.0127
77 2.1608
0.0126
78 2.1733
0.0125
79 2.1857
0.0124
80 2.1980
0.0123
81 2.2102
0.0122
82 2.2224
0.0121
83 2.2344
0.0121
84 2.2464
0.0120
85 2.2583
0.0119
86 2.2702
0.0118
87 2.2819
0.0118
88 2.2936
0.0117
89 2.3052
0.0116
90 2.3167
0.0115
91 2.3282
0.0115
92 2.3396
0.0114
93 2.3509
0.0113
94 2.3622
0.0113
95 2.3734
0.0112
96 2.3845
0.0111
97 2.3956
0.0111
98 2.4066
0.0110
99 2.4175
0.0109
100
2.4284
0.0109
101
2.4392
0.0108
102
2.4500
0.0108
103
2.4607
0.0107
104
2.4713
0.0106
105
2.4819
0.0106
106
2.4924
0.0105
107
2.5029
0.0105
108
2.5133
0.0104
109
2.5237
0.0104
110
2.5340
0.0103
111
2.5443
0.0103
112
2.5545
0.0102
113
2.5646
0.0102
114
2.5748
0.0101
115
2.5848
0.0101
116
2.5948
0.0100
117
2.6048
0.0100
118
2.6147
0.0099
119
2.6246
0.0099
120
2.6344
0.0098
121
2.6442
0.0098
122
2.6540
0.0097
123
2.6637
0.0097
124
2.6733
0.0097
125
2.6829
0.0096
126
2.6925
0.0096
127
2.7020
0.0095
128
2.7115
0.0095
129
2.7209
0.0094
130
2.7303
0.0094
131
2.7397
0.0094
132
2.7490
0.0093
133
2.7583
0.0093
134
2.7676
0.0092
135
2.7768
0.0092
136
2.7859
0.0092
137
2.7951
0.0091
138
2.8042
0.0091
139
2.8132
0.0091
140
2.8222
0.0090
141
2.8312
0.0090
142
2.8402
0.0090
143
2.8491
0.0089
144
2.8580
0.0089
145
2.8668
0.0088
146
2.8756
0.0088
147
2.8844
0.0088
148
2.8932
0.0087
149
2.9019
0.0087
150
2.9106
0.0087
151
2.9192
0.0087
152
2.9278
0.0086
153
2.9364
0.0086
154
2.9450
0.0086
155
2.9535
0.0085
156
2.9620
0.0085
157
2.9705
0.0085
158
2.9789
0.0084
159
2.9873
0.0084
160
2.9957
0.0084
161
3.0041
0.0083
162
3.0124
0.0083
163
3.0207
0.0083
164
3.0289
0.0083
165
3.0372
0.0082
166
3.0454
0.0082
167
3.0536
0.0082
168
3.0617
0.0082
169
3.0698
0.0081
170
3.0779
0.0081
171
3.0860
0.0081
172
3.0941
0.0080
173
3.1021
0.0080
174
3.1101
0.0080
175
3.1181
0.0080
176
3.1260
0.0079
177
3.1339
0.0079
178
3.1418
0.0079
179
3.1497
0.0079
180
3.1575
0.0078
181
3.1654
0.0078
182
3.1732
0.0078
183
3.1809
0.0078
184
3.1887
0.0078
185
3.1964
0.0077
186
3.2041
0.0077
187
3.2118
0.0077
188
3.2195
0.0077
189
3.2271
0.0076
190
3.2347
0.0076
191
3.2423
0.0076
192
3.2499
0.0076
193
3.2574
0.0076
194
3.2650
0.0075
195
3.2725
0.0075
196
3.2800
0.0075
197
3.2874
0.0075
198
3.2949
0.0074
199
3.3023
0.0074
200
3.3097
0.0074
201
3.3171
0.0074
202
3.3244
0.0074
203
3.3318
0.0073
204
3.3391
0.0073
205
3.3464
0.0073
206
3.3537
0.0073
207
3.3610
0.0073
208
3.3682
0.0072
209
3.3754
0.0072
210
3.3826
0.0072
211
3.3898
0.0072
212
3.3970
0.0072
213
3.4041
0.0071
214
3.4113
0.0071
215
3.4184
0.0071
216
3.4255
0.0071
217
3.4325
0.0071
218
3.4396
0.0071
219
3.4466
0.0070
220
3.4537
0.0070
221
3.4607
0.0070
222
3.4677
0.0070
223
3.4746
0.0070
224
3.4816
0.0070
225
3.4885
0.0069
226
3.4954
0.0069
227
3.5023
0.0069
228
3.5092
0.0069
229
3.5161
0.0069
230
3.5229
0.0069
231
3.5298
0.0068
232
3.5366
0.0068
233
3.5434
0.0068
234
3.5502
0.0068
235
3.5569
0.0068
236
3.5637
0.0068
237
3.5704
0.0067
238
3.5771
0.0067
239
3.5839
0.0067
240
3.5905
0.0067
241
3.5972
0.0067
242
3.6039
0.0067
243
3.6105
0.0066
244
3.6172
0.0066
245
3.6238
0.0066
246
3.6304
0.0066
247
3.6370
0.0066
248
3.6435
0.0066
249
3.6501
0.0066
250
3.6566
0.0065
251
3.6631
0.0065
252
3.6697
0.0065
253
3.6762
0.0065
254
3.6826
0.0065
255
3.6891
0.0065
256
3.6956
0.0065
257
3.7020
0.0064
258
3.7084
0.0064
259
3.7148
0.0064
260
3.7212
0.0064
261
3.7276
0.0064
262
3.7340
0.0064
263
3.7404
0.0064
264
3.7467
0.0063
265
3.7530
0.0063
266
3.7594
0.0063
267
3.7657
0.0063
268
3.7720
0.0063
269
3.7782
0.0063
270
3.7845
0.0063
271
3.7908
0.0063
272
3.7970
0.0062
273
3.8032
0.0062
274
3.8095
0.0062
275
3.8157
0.0062
276
3.8219
0.0062
277
3.8280
0.0062
278
3.8342
0.0062
279
3.8404
0.0062
280
3.8465
0.0061
281
3.8526
0.0061
282
3.8587
0.0061
283
3.8649
0.0061
284
3.8709
0.0061
285
3.8770
0.0061
286
3.8831
0.0061
287
3.8892
0.0061
288
3.8952
0.0060
Unit
Unit
Period
Rainfall
(number)
(In)
Unit Effective
Soil -Loss Rainfall
(In) (In)
1 0.0060
0.0026
0.0034
2 0.0061
0.0026
0.0034
3 0.0061
0.0027
0.0034
4 0.0061
0.0027
0.0034
5 0.0061
0.0027
0.0034
6 0.0061
0.0027
0.0035
7 0.0062
0.0027
0.0035
8 0.0062
0.0027
0.0035
9 0.0062
0.0027
0.0035
10 0.0062
0.0027
0.0035
11 0.0062
0.0027
0.0035
12 0.0062
0.0027
0.0035
13 0.0063
0.0027
0.0035
14 0.0063
0.0027
0.0035
15 0.0063
0.0028
0.0036
16 0.0063
0.0028
0.0036
17 0.0063
0.0028
0.0036
18 0.0064
0.0028
0.0036
19 0.0064
0.0028
0.0036
20 0.0064
0.0028
0.0036
21 0.0064
0.0028
0.0036
22 0.0064
0.0028
0.0036
23 0.0065
0.0028
0.0036
24 0.0065
0.0028
0.0037
25 0.0065
0.0028
0.0037
26 0.0065
0.0028
0.0037
27 0.0066
0.0029
0.0037
28 0.0066
0.0029
0.0037
29 0.0066
0.0029
0.0037
30 0.0066
0.0029
0.0037
31 0.0066
0.0029
0.0037
32 0.0067
0.0029
0.0038
33 0.0067
0.0029
0.0038
34 0.0067
0.0029
0.0038
35 0.0067
0.0029
0.0038
36 0.0068
0.0029
0.0038
37 0.0068
0.0030
0.0038
38 0.0068
0.0030
0.0038
39 0.0068
0.0030
0.0039
40 0.0069
0.0030
0.0039
41 0.0069
0.0030
0.0039
42 0.0069
0.0030
0.0039
43 0.0069
0.0030
0.0039
44 0.0070
0.0030
0.0039
45 0.0070
0.0030
0.0039
46 0.0070
0.0031
0.0039
47 0.0070
0.0031
0.0040
48 0.0071
0.0031
0.0040
49 0.0071
0.0031
0.0040
50 0.0071
0.0031
0.0040
51 0.0071
0.0031
0.0040
52 0.0072
0.0031
0.0040
53 0.0072
0.0031
0.0041
54 0.0072
0.0032
0.0041
55 0.0073
0.0032
0.0041
56 0.0073
0.0032
0.0041
57 0.0073
0.0032
0.0041
58 0.0073
0.0032
0.0041
59 0.0074
0.0032
0.0042
60 0.0074
0.0032
0.0042
61 0.0074
0.0032
0.0042
62 0.0075
0.0033
0.0042
63 0.0075
0.0033
0.0042
64 0.0075
0.0033
0.0042
65 0.0076
0.0033
0.0043
66 0.0076
0.0033
0.0043
67 0.0076
0.0033
0.0043
68 0.0077
0.0033
0.0043
69 0.0077
0.0034
0.0043
70 0.0077
0.0034
0.0044
71 0.0078
0.0034
0.0044
72 0.0078
0.0034
0.0044
73 0.0078
0.0034
0.0044
74 0.0079
0.0034
0.0044
75 0.0079
0.0035
0.0045
76 0.0079
0.0035
0.0045
77 0.0080
0.0035
0.0045
78 0.0080
0.0035
0.0045
79 0.0081
0.0035
0.0046
80 0.0081
0.0035
0.0046
81 0.0082
0.0036
0.0046
82 0.0082
0.0036
0.0046
83 0.0082
0.0036
0.0046
84 0.0083
0.0036
0.0047
85 0.0083
0.0036
0.0047
86 0.0083
0.0036
0.0047
87 0.0084
0.0037
0.0047
88 0.0084
0.0037
0.0048
89 0.0085
0.0037
0.0048
90 0.0085
0.0037
0.0048
91 0.0086
0.0037
0.0048
92 0.0086
0.0038
0.0049
93 0.0087
0.0038
0.0049
94 0.0087
0.0038
0.0049
95 0.0088
0.0038
0.0050
96 0.0088
0.0038
0.0050
97 0.0089
0.0039
0.0050
98 0.0089
0.0039
0.0050
99 0.0090
0.0039
0.0051
100
0.0090
0.0039
0.0051
101
0.0091
0.0040
0.0051
102
0.0091
0.0040
0.0051
103
0.0092
0.0040
0.0052
104
0.0092
0.0040
0.0052
105
0.0093
0.0041
0.0053
106
0.0094
0.0041
0.0053
107
0.0094
0.0041
0.0053
108
0.0095
0.0041
0.0053
109
0.0096
0.0042
0.0054
110
0.0096
0.0042
0.0054
111
0.0097
0.0042
0.0055
112
0.0097
0.0042
0.0055
113
0.0098
0.0043
0.0055
114
0.0099
0.0043
0.0056
115
0.0100
0.0043
0.0056
116
0.0100
0.0044
0.0056
117
0.0101
0.0044
0.0057
118
0.0102
0.0044
0.0057
119
0.0103
0.0045
0.0058
120
0.0103
0.0045
0.0058
121
0.0104
0.0045
0.0059
122
0.0105
0.0046
0.0059
123
0.0106
0.0046
0.0060
124
0.0106
0.0046
0.0060
125
0.0108
0.0047
0.0061
126
0.0108
0.0047
0.0061
127
0.0109
0.0048
0.0062
128
0.0110
0.0048
0.0062
129
0.0111
0.0049
0.0063
130
0.0112
0.0049
0.0063
131
0.0113
0.0049
0.0064
132
0.0114
0.0050
0.0064
133
0.0115
0.0050
0.0065
134
0.0116
0.0051
0.0065
135
0.0118
0.0051
0.0066
136
0.0118
0.0052
0.0067
137
0.0120
0.0052
0.0068
138
0.0121
0.0053
0.0068
139
0.0122
0.0053
0.0069
140
0.0123
0.0054
0.0069
141
0.0125
0.0054
0.0070
142
0.0126
0.0055
0.0071
143
0.0128
0.0056
0.0072
144
0.0129
0.0056
0.0073
145
0.0152
0.0066
0.0085
146
0.0153
0.0067
0.0086
147
0.0155
0.0067
0.0087
148
0.0156
0.0068
0.0088
149
0.0158
0.0069
0.0089
150
0.0159
0.0069
0.0090
151
0.0162
0.0071
0.0091
152
0.0163
0.0071
0.0092
153
0.0166
0.0072
0.0093
154
0.0167
0.0073
0.0094
155
0.0170
0.0074
0.0096
156
0.0171
0.0075
0.0097
157
0.0174
0.0076
0.0098
158
0.0176
0.0077
0.0099
159
0.0179
0.0078
0.0101
160
0.0181
0.0079
0.0102
161
0.0185
0.0080
0.0104
162
0.0186
0.0081
0.0105
163
0.0190
0.0083
0.0107
164
0.0193
0.0084
0.0109
165
0.0197
0.0086
0.0111
166
0.0199
0.0087
0.0112
167
0.0204
0.0089
0.0115
168
0.0207
0.0090
0.0117
169
0.0212
0.0093
0.0120
170
0.0215
0.0094
0.0121
171
0.0222
0.0097
0.0125
172
0.0225
0.0098
0.0127
173
0.0232
0.0101
0.0131
174
0.0236
0.0103
0.0133
175
0.0244
0.0107
0.0138
176
0.0249
0.0109
0.0140
177
0.0259
0.0113
0.0146
178
0.0265
0.0115
0.0149
179
0.0277
0.0121
0.0156
180
0.0283
0.0124
0.0160
181
0.0299
0.0130
0.0168
182
0.0307
0.0134
0.0173
183
0.0327
0.0143
0.0184
184
0.0338
0.0148
0.0191
185
0.0283
0.0123
0.0160
186
0.0299
0.0130
0.0169
187
0.0340
0.0148
0.0191
188
0.0366
0.0160
0.0206
189
0.0441
0.0192
0.0249
190
0.0498
0.0217
0.0281
191
0.0712
0.0310
0.0401
192
0.0979
0.0326
0.0653
193
0.3063
0.0326
0.2738
194
0.0580
0.0253
0.0327
195
0.0399
0.0174
0.0225
196
0.0318
0.0139
0.0179
197
0.0351
0.0153
0.0198
198
0.0316
0.0138
0.0178
199
0.0291
0.0127
0.0164
200
0.0270
0.0118
0.0152
201
0.0254
0.0111
0.0143
202
0.0240
0.0105
0.0135
203
0.0228
0.0100
0.0129
204
0.0218
0.0095
0.0123
205
0.0209
0.0091
0.0118
206
0.0202
0.0088
0.0114
207
0.0195
0.0085
0.0110
208
0.0188
0.0082
0.0106
209
0.0183
0.0080
0.0103
210
0.0177
0.0077
0.0100
211
0.0173
0.0075
0.0097
212
0.0168
0.0073
0.0095
213
0.0164
0.0072
0.0093
214
0.0160
0.0070
0.0090
215
0.0157
0.0068
0.0088
216
0.0154
0.0067
0.0087
217
0.0130
0.0057
0.0073
218
0.0127
0.0055
0.0071
219
0.0124
0.0054
0.0070
220
0.0121
0.0053
0.0068
221
0.0119
0.0052
0.0067
222
0.0117
0.0051
0.0066
223
0.0115
0.0050
0.0065
224
0.0113
0.0049
0.0063
225
0.0111
0.0048
0.0062
226
0.0109
0.0047
0.0061
227
0.0107
0.0047
0.0060
228
0.0105
0.0046
0.0059
229
0.0104
0.0045
0.0058
230
0.0102
0.0045
0.0058
231
0.0101
0.0044
0.0057
232
0.0099
0.0043
0.0056
233
0.0098
0.0043
0.0055
234
0.0097
0.0042
0.0054
235
0.0095
0.0042
0.0054
236
0.0094
0.0041
0.0053
237
0.0093
0.0040
0.0052
238
0.0092
0.0040
0.0052
239
0.0091
0.0040
0.0051
240
0.0090
0.0039
0.0050
241
0.0088
0.0039
0.0050
242
0.0087
0.0038
0.0049
243
0.0087
0.0038
0.0049
244
0.0086
0.0037
0.0048
245
0.0085
0.0037
0.0048
246
0.0084
0.0037
0.0047
247
0.0083
0.0036
0.0047
248
0.0082
0.0036
0.0046
249
0.0081
0.0035
0.0046
250
0.0080
0.0035
0.0045
251
0.0080
0.0035
0.0045
252
0.0079
0.0034
0.0045
253
0.0078
0.0034
0.0044
254
0.0078
0.0034
0.0044
255
0.0077
0.0034
0.0043
256
0.0076
0.0033
0.0043
257
0.0076
0.0033
0.0043
258
0.0075
0.0033
0.0042
259
0.0074
0.0032
0.0042
260
0.0074
0.0032
0.0042
261
0.0073
0.0032
0.0041
262
0.0072
0.0032
0.0041
263
0.0072
0.0031
0.0041
264
0.0071
0.0031
0.0040
265
0.0071
0.0031
0.0040
266
0.0070
0.0031
0.0040
267
0.0070
0.0030
0.0039
268
0.0069
0.0030
0.0039
269
0.0069
0.0030
0.0039
270
0.0068
0.0030
0.0038
271
0.0068
0.0030
0.0038
272
0.0067
0.0029
0.0038
273
0.0067
0.0029
0.0038
274
0.0066
0.0029
0.0037
275
0.0066
0.0029
0.0037
276
0.0065
0.0029
0.0037
277
0.0065
0.0028
0.0037
278
0.0065
0.0028
0.0036
279
0.0064
0.0028
0.0036
280
0.0064
0.0028
0.0036
281
0.0063
0.0028
0.0036
282
0.0063
0.0027
0.0035
283
0.0063
0.0027
0.0035
284
0.0062
0.0027
0.0035
285
0.0062
0.0027
0.0035
286
0.0061
0.0027
0.0035
287
0.0061
0.0027
0.0034
288
0.0061
0.0026
0.0034
-------------------------------------------------------------------- Total soil rain loss = 1.59(In)
Total effective rainfall = 2.31(In)
Peak flow rate in flood hydrograph = 11.40(CFS)
--------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 24 -
H O U
R S T 0 R M
R
u n o f
f
H y d r o g r a p h
-------------------------------------------------------------------- Hydrograph in
5 Minute intervals ((CFS))
-------------------------------------------------------------------- Time(h+m)
Volume Ac.Ft
Q(CFS)
0 5.0 10.0 15.0 20.0
----------------------------------------------------------------------- 0+ 5
0.0001
0.02 Q
0+10
0.0009
0.11 Q
0+15
0.0025
0.23 Q
0+20
0.0044
0.27 Q
0+25
0.0063
0.29 Q
0+30
0.0083
0.29 Q
0+35
0.0103
0.29 Q
0+40
0.0124
0.29 Q
0+45
0.0144
0.29 Q
0+50
0.0164
0.29 Q
0+55
0.0184
0.30 Q
1+ 0
0.0205
0.30 Q
1+ 5
0.0225
0.30 Q
1+10
0.0246
0.30 Q
1+15
0.0266
0.30 Q
1+20
0.0287
0.30 Q
1+25
0.0308
0.30 Q
1+30
0.0328
0.30 Q
1+35
0.0349
0.30 QV
1+40
0.0370
0.30 QV
1+45
0.0391
0.30 QV
1+50
0.0412
0.31 QV
1+55
0.0433
0.31 QV
2+ 0
0.0454
0.31 QV
2+ 5
0.0476
0.31 QV
2+10
0.0497
0.31 QV
2+15
0.0518
0.31 QV
2+20
0.0540
0.31 QV
2+25
0.0561
0.31 QV
2+30
0.0583
0.31 QV
2+35
0.0605
0.31 QV
2+40
0.0626
0.32 QV
2+45
0.0648
0.32 QV
2+50
0.0670
0.32 QV
2+55
0.0692
0.32 Q V
3+ 0
0.0714
0.32 Q V
3+ 5
0.0736
0.32 Q V
3+10
0.0758
0.32 Q V
3+15
0.0781
0.32 Q V
3+20
0.0803
0.32 Q V
3+25
0.0825
0.33 Q V
3+30
0.0848
0.33 Q V
3+35
0.0870
0.33 Q V
3+40
0.0893
0.33 Q V
3+45
0.0916
0.33 Q V
3+50
0.0939
0.33 Q V
3+55
0.0962
0.33 Q V
4+ 0
0.0985
0.33 Q V
4+ 5
0.1008
0.34 Q V
4+10
0.1031
0.34 Q V
4+15
0.1054
0.34 Q V
4+20
0.1078
0.34 Q V
4+25
0.1101
0.34 Q V
4+30
0.1125
0.34 Q V
4+35
0.1148
0.34 Q V
4+40
0.1172
0.34 Q V
4+45
0.1196
0.35 Q V
4+50
0.1220
0.35 Q V
4+55
0.1244
0.35 Q V
5+ 0
0.1268
0.35 Q V
5+ 5
0.1292
0.35 Q V
5+10
0.1317
0.35 Q V
5+15
0.1341
0.35 Q V
5+20
0.1366
0.36 Q V
5+25
0.1390
0.36 Q V
5+30
0.1415
0.36 Q V
5+35
0.1440
0.36 Q V
5+40
0.1465
0.36 Q V
5+45
0.1490
0.36 Q V
5+50
0.1515
0.37 Q V
5+55
0.1540
0.37 Q V
6+ 0
0.1566
0.37 Q V
6+ 5
0.1591
0.37 Q V
6+10
0.1617
0.37 Q V
6+15
0.1643
0.37 Q V
6+20
0.1669
0.38 Q V
6+25
0.1695
0.38 Q V
6+30
0.1721
0.38 Q V
6+35
0.1747
0.38 Q V
6+40
0.1773
0.38 Q V
6+45
0.1800
0.38 6+50
0.1827
0.39 6+55
0.1853
0.39 7+ 0
0.1880
0.39 7+ 5
0.1907
0.39 7+10
0.1934
0.39 7+15
0.1962
0.40 7+20
0.1989
0.40 7+25
0.2017
0.40 7+30
0.2045
0.40 7+35
0.2072
0.41 7+40
0.2101
0.41 7+45
0.2129
0.41 7+50
0.2157
0.41 7+55
0.2186
0.41 8+ 0
0.2214
0.42 8+ 5
0.2243
0.42 8+10
0.2272
0.42 8+15
0.2301
0.42 8+20
0.2331
0.43 8+25
0.2360
0.43 8+30
0.2390
0.43 8+35
0.2420
0.43 8+40
0.2450
0.44 8+45
0.2480
0.44 8+50
0.2510
0.44 8+55
0.2541
0.44 9+ 0
0.2572
0.45 9+ 5
0.2603
0.45 9+10
0.2634
0.45 9+15
0.2665
0.46 9+20
0.2697
0.46 9+25
0.2729
0.46 9+30
0.2761
0.47 9+35
0.2793
0.47 9+40
0.2826
0.47 9+45
0.2858
0.48 9+50
0.2891
0.48 9+55
0.2925
0.48 10+ 0
0.2958
0.49 10+ 5
0.2992
0.49 10+10
0.3026
0.49 10+15
0.3060
0.50 10+20
0.3094
0.50 10+25
0.3129
0.50 10+30
0.3164
0.51 10+35
0.3199
0.51 10+40
0.3235
0.52 10+45
0.3271
0.52 10+50
0.3307
0.53 4
M
4 M
4 �M
1Tj
10+55
0.3344
0.53 IQ
11+ 0
0.3381
0.54 IQ
11+ 5
0.3418
0.54 IQ
11+10
0.3455
0.54 IQ
11+15
0.3493
0.55 IQ
11+20
0.3531
0.56 IQ
11+25
0.3570
0.56 IQ
11+30
0.3609
0.57 IQ
11+35
0.3648
0.57 IQ
11+40
0.3688
0.58 IQ
11+45
0.3728
0.58 IQ
11+50
0.3769
0.59 IQ
11+55
0.3810
0.60 IQ
12+ 0
0.3851
0.60 IQ
12+ 5
0.3894
0.61 IQ
12+10
0.3939
0.65 IQ
12+15
0.3987
0.70 IQ
12+20
0.4037
0.72 IQ
12+25
0.4088
0.74 IQ
12+30
0.4139
0.75 IQ
12+35
0.4191
0.75 IQ
12+40
0.4243
0.76 IQ
12+45
0.4297
0.77 IQ
12+50
0.4350
0.78 IQ
12+55
0.4405
0.79 IQ
13+ 0
0.4460
0.80 IQ
13+ 5
0.4515
0.81 IQ
13+10
0.4572
0.82 IQ
13+15
0.4629
0.83 IQ
13+20
0.4687
0.84 IQ
13+25
0.4746
0.85 IQ
13+30
0.4806
0.87 IQ
13+35
0.4866
0.88 IQ
13+40
0.4928
0.89 IQ
13+45
0.4990
0.91 IQ
13+50
0.5054
0.92 IQ
13+55
0.5119
0.94 IQ
14+ 0
0.5185
0.96 IQ
14+ 5
0.5252
0.97 IQ
14+10
0.5320
0.99 IQ
14+15
0.5390
1.01 1 Q
14+20
0.5461
1.03 Q
14+25
0.5534
1.06 Q
14+30
0.5608
1.08 Q
14+35
0.5685
1.11 Q
14+40
0.5763
1.14 Q
14+45
0.5843
1.17 Q
14+50
0.5926
1.20 Q
14+55
0.6011
1.24 Q
15+ 0
0.6099
1.28 Q
VI
4 M
4 M
4 M
4 M
V
15+ 5
0.6190
1.32 Q
15+10
0.6285
1.37 Q
15+15
0.6383
1.43 Q
15+20
0.6486
1.49 Q
15+25
0.6592
1.54 Q
15+30
0.6695
1.50 Q
15+35
0.6794
1.44 Q
15+40
0.6898
1.51 Q
15+45
0.7011
1.65 Q
15+50
0.7140
1.87 Q
15+55
0.7290
2.19 Q
16+ 0
0.7485
2.82 Q
16+ 5
0.7834
5.07 16+10
0.8569
10.68 16+15
0.9355
11.40 16+20
0.9739
5.57 16+25
0.9928
2.74 Q
16+30
1.0060
1.92 Q
16+35
1.0177
1.70 Q
16+40
1.0279
1.49 Q
16+45
1.0374
1.38 Q
16+50
1.0462
1.28 Q
16+55
1.0545
1.21 Q
17+ 0
1.0624
1.14 Q
17+ 5
1.0698
1.08 Q
17+10
1.0770
1.04 Q
17+15
1.0838
0.99 IQ
17+20
1.0904
0.96 IQ
17+25
1.0968
0.92 IQ
17+30
1.1030
0.89 IQ
17+35
1.1089
0.87 IQ
17+40
1.1147
0.84 IQ
17+45
1.1204
0.82 IQ
17+50
1.1259
0.80 IQ
17+55
1.1313
0.78 IQ
18+ 0
1.1365
0.76 IQ
18+ 5
1.1416
0.74 IQ
18+10
1.1464
0.69 IQ
18+15
1.1508
0.64 IQ
18+20
1.1549
0.61 IQ
18+25
1.1590
0.59 IQ
18+30
1.1630
0.58 IQ
18+35
1.1669
0.57 IQ
18+40
1.1707
0.56 IQ
18+45
1.1745
0.54 IQ
18+50
1.1781
0.54 IQ
18+55
1.1818
0.53 IQ
19+ 0
1.1853
0.52 IQ
19+ 5
1.1888
0.51 IQ
19+10
1.1923
0.50 IQ
V
V
V
V
u
V
19+15
1.1957
0.49 19+20
1.1990
0.49 19+25
1.2023
0.48 19+30
1.2056
0.47 19+35
1.2088
0.47 19+40
1.2119
0.46 19+45
1.2151
0.45 19+50
1.2181
0.45 19+55
1.2212
0.44 20+ 0
1.2242
0.44 20+ 5
1.2272
0.43 20+10
1.2301
0.43 20+15
1.2330
0.42 20+20
1.2359
0.42 20+25
1.2387
0.41 20+30
1.2415
0.41 20+35
1.2443
0.40 20+40
1.2470
0.40 20+45
1.2497
0.39 20+50
1.2524
0.39 20+55
1.2551
0.39 21+ 0
1.2577
0.38 21+ 5
1.2603
0.38 21+10
1.2629
0.38 21+15
1.2655
0.37 21+20
1.2680
0.37 21+25
1.2705
0.37 21+30
1.2730
0.36 21+35
1.2755
0.36 21+40
1.2780
0.36 21+45
1.2804
0.35 21+50
1.2828
0.35 21+55
1.2852
0.35 22+ 0
1.2876
0.34 22+ 5
1.2899
0.34 22+10
1.2923
0.34 22+15
1.2946
0.34 22+20
1.2969
0.33 22+25
1.2992
0.33 22+30
1.3015
0.33 22+35
1.3037
0.33 22+40
1.3059
0.32 22+45
1.3082
0.32 22+50
1.3104
0.32 22+55
1.3126
0.32 23+ 0
1.3147
0.32 23+ 5
1.3169
0.31 23+10
1.3190
0.31 23+15
1.3212
0.31 23+20
1.3233
0.31 23+25
1.3254
0.31 Q I
I I VI
23+30
1.3275
0.30 Q I
I I VI
23+35
1.3296
0.30 Q I
I I VI
23+40
1.3316
0.30 Q I
I I VI
23+45
1.3337
0.30 Q I
I I VI
23+50
1.3357
0.30 Q I
I I VI
23+55
1.3377
0.29 Q I
I I VI
24+ 0
1.3397
0.29 Q I
I I VI
24+ 5
1.3416
0.27 Q I
I I VI
24+10
1.3428
0.18 Q I
I I VI
24+15
1.3433
0.06 Q I
I I VI
24+20
1.3434
0.02 Q I
I I VI
24+25
1.3434
0.00 Q I
I I VI
24+30
-----------------------------------------------------------------------
1.3434
0.00 Q I
I I V
U n i t H y d r o g r a p h A n a l y s i s
Copyright (c) CIVILCADD/CIVILDESIGN, 1989 - 2018, Version 9.0 Study date 08/22/22
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ San Bernardino County Synthetic Unit Hydrology Method
Manual date - August 1986
Program License Serial Number 6481
--------------------------------------------------------------------- TTM 20372
Post Development Unit Hydrograph - DA 2
100 yr
24 hr
Storm Event Year = 100
Antecedent Moisture Condition = 3
English (in -lb) Input Units Used
English Rainfall Data (Inches) Input Values Used
English Units used in output format
Area averaged rainfall intensity isohyetal data:
Sub -Area
Duration
Isohyetal
(Ac.)
(hours)
(In)
Rainfall
data for
year
10 6.99
1 0.83
-------------------------------------------------------------------- Rainfall
data for
year
2 6.99
6 1.34
-------------------------------------------------------------------- Rainfall
data for
year
2 6.99
24 2.48
-------------------------------------------------------------------- Rainfall
data for
year
100
6.99 1 1.36
--------------------------
Rainfall data for year 100
6.99 6 3.18
-------------------------------------------------------------------- Rainfall data for year 100
6.99 24 5.92
-------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ******** Area -averaged max loss rate, Fm ********
SCS curve SCS curve Area Area Fp(Fig C6) Ap Fm
No.(AMCII) NO.(AMC 3) (Ac.) Fraction (In/Hr) (dec.) (In/Hr)
32.0 52.0 6.99 1.000 0.785 0.400 0.314
Area -averaged adjusted loss rate Fm (In/Hr) = 0.314
********* Area -Averaged low loss rate fraction, Yb ********** Area Area
SCS CN
SCS CN
S Pervious
(Ac.) Fract
(AMC2)
(AMC3)
Yield Fr
2.80 0.400
32.0 52.0
9.23 0.211
4.19 0.600
98.0 98.0
0.20 0.960
Area -averaged catchment yield fraction, Y = 0.660
Area -averaged low loss fraction, Yb = 0.340
Direct entry of lag time by user
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Watershed area = 6.99(Ac.)
Catchment Lag time = 0.144 hours
Unit interval = 5.000 minutes
Unit interval percentage of lag time = 57.9509
Hydrograph baseflow = 0.00(CFS)
Average maximum watershed loss rate(Fm) = 0.314(In/Hr)
Average low loss rate fraction (Yb) = 0.340 (decimal)
VALLEY DEVELOPED S-Graph Selected
Computed peak 5-minute rainfall = 0.503(In)
Computed peak 30-minute rainfall = 1.031(In)
Specified peak 1-hour rainfall = 1.360(In)
Computed peak 3-hour rainfall = 2.289(In)
Specified peak 6-hour rainfall = 3.180(In)
Specified peak 24-hour rainfall = 5.920(In)
Rainfall depth area reduction factors:
Using a total area of 6.99(Ac.) (Ref: fig. E-4)
5-minute factor = 1.000 Adjusted rainfall = 0.503(In)
30-minute factor
= 1.000
Adjusted
rainfall =
1.030(In)
1-hour factor =
1.000
Adjusted
rainfall =
1.360(In)
3-hour factor =
1.000
Adjusted
rainfall =
2.289(In)
6-hour factor =
1.000
Adjusted
rainfall =
3.180(In)
24-hour factor =
---------------------------------------------------------------------
1.000
Adjusted
rainfall =
5.920(In)
U n i t H y d r o g r a p h
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Interval 'S' Graph Unit Hydrograph
Number Mean values ((CFS))
(K =
84.54 (CFS))
1 6.093
5.151
2 39.108
27.910
3 79.650
34.272
4 94.671
12.698
5 98.475
3.216
6 99.531
0.893
7 100.000
0.396
--------------------------------------------------------------------- Peak Unit
Adjusted mass
rainfall Unit rainfall
Number
(In)
(In)
1 0.5032
0.5032
2 0.6640
0.1608
3 0.7809
0.1169
4 0.8761
0.0952
5 0.9579
0.0818
6 1.0303
0.0725
7 1.0959
0.0655
8 1.1560
0.0601
9 1.2118
0.0558
10 1.2639
0.0522
11 1.3130
0.0491
12 1.3596
0.0465
13 1.4122
0.0526
14 1.4627
0.0505
15 1.5113
0.0487
16 1.5583
0.0470
17 1.6038
0.0455
18 1.6479
0.0441
19 1.6907
0.0428
20 1.7323
0.0416
21 1.7729
0.0406
22 1.8124
0.0396
23 1.8510
0.0386
24 1.8888
0.0377
25 1.9257
0.0369
26 1.9619
0.0362
27 1.9973
0.0354
28 2.0321
0.0348
29 2.0662
0.0341
30 2.0996
0.0335
31 2.1326
0.0329
32 2.1649
0.0324
33 2.1967
0.0318
34 2.2281
0.0313
35 2.2589
0.0308
36 2.2893
0.0304
37 2.3192
0.0299
38 2.3487
0.0295
39 2.3778
0.0291
40 2.4066
0.0287
41 2.4349
0.0283
42 2.4629
0.0280
43 2.4905
0.0276
44 2.5178
0.0273
45 2.5448
0.0270
46 2.5714
0.0267
47 2.5978
0.0264
48 2.6238
0.0261
49 2.6496
0.0258
50 2.6751
0.0255
51 2.7003
0.0252
52 2.7253
0.0250
53 2.7500
0.0247
54 2.7745
0.0245
55 2.7987
0.0242
56 2.8228
0.0240
57 2.8465
0.0238
58 2.8701
0.0236
59 2.8935
0.0234
60 2.9166
0.0231
61 2.9396
0.0229
62 2.9623
0.0227
63 2.9849
0.0226
64 3.0072
0.0224
65 3.0294
0.0222
66 3.0514
0.0220
67 3.0733
0.0218
68 3.0949
0.0217
69 3.1164
0.0215
70 3.1377
0.0213
71 3.1589
0.0212
72 3.1799
0.0210
73 3.1997
0.0197
74 3.2192
0.0196
75 3.2387
0.0194
76 3.2579
0.0193
77 3.2771
0.0191
78 3.2961
0.0190
79 3.3150
0.0189
80 3.3337
0.0187
81 3.3523
0.0186
82 3.3708
0.0185
83 3.3892
0.0184
84 3.4075
0.0182
85 3.4256
0.0181
86 3.4436
0.0180
87 3.4615
0.0179
88 3.4793
0.0178
89 3.4969
0.0177
90 3.5145
0.0176
91 3.5319
0.0175
92 3.5493
0.0173
93 3.5665
0.0172
94 3.5837
0.0171
95 3.6007
0.0170
96 3.6177
0.0169
97 3.6345
0.0168
98 3.6512
0.0167
99 3.6679
0.0167
100
3.6845
0.0166
101
3.7009
0.0165
102
3.7173
0.0164
103
3.7336
0.0163
104
3.7498
0.0162
105
3.7659
0.0161
106
3.7820
0.0160
107
3.7979
0.0160
108
3.8138
0.0159
109
3.8296
0.0158
110
3.8453
0.0157
111
3.8609
0.0156
112
3.8765
0.0156
113
3.8920
0.0155
114
3.9074
0.0154
115
3.9227
0.0153
116
3.9380
0.0153
117
3.9531
0.0152
118
3.9683
0.0151
119
3.9833
0.0150
120
3.9983
0.0150
121
4.0132
0.0149
122
4.0280
0.0148
123
4.0428
0.0148
124
4.0575
0.0147
125
4.0721
0.0146
126
4.0867
0.0146
127
4.1012
0.0145
128
4.1156
0.0144
129
4.1300
0.0144
130
4.1443
0.0143
131
4.1586
0.0143
132
4.1728
0.0142
133
4.1869
0.0141
134
4.2010
0.0141
135
4.2150
0.0140
136
4.2290
0.0140
137
4.2429
0.0139
138
4.2568
0.0139
139
4.2706
0.0138
140
4.2843
0.0137
141
4.2980
0.0137
142
4.3117
0.0136
143
4.3252
0.0136
144
4.3388
0.0135
145
4.3523
0.0135
146
4.3657
0.0134
147
4.3791
0.0134
148
4.3924
0.0133
149
4.4057
0.0133
150
4.4189
0.0132
151
4.4321
0.0132
152
4.4452
0.0131
153
4.4583
0.0131
154
4.4714
0.0130
155
4.4843
0.0130
156
4.4973
0.0129
157
4.5102
0.0129
158
4.5231
0.0129
159
4.5359
0.0128
160
4.5486
0.0128
161
4.5614
0.0127
162
4.5740
0.0127
163
4.5867
0.0126
164
4.5993
0.0126
165
4.6118
0.0126
166
4.6243
0.0125
167
4.6368
0.0125
168
4.6492
0.0124
169
4.6616
0.0124
170
4.6739
0.0123
171
4.6863
0.0123
172
4.6985
0.0123
173
4.7107
0.0122
174
4.7229
0.0122
175
4.7351
0.0121
176
4.7472
0.0121
177
4.7593
0.0121
178
4.7713
0.0120
179
4.7833
0.0120
180
4.7953
0.0120
181
4.8072
0.0119
182
4.8191
0.0119
183
4.8309
0.0119
184
4.8427
0.0118
185
4.8545
0.0118
186
4.8663
0.0117
187
4.8780
0.0117
188
4.8897
0.0117
189
4.9013
0.0116
190
4.9129
0.0116
191
4.9245
0.0116
192
4.9360
0.0115
193
4.9475
0.0115
194
4.9590
0.0115
195
4.9704
0.0114
196
4.9819
0.0114
197
4.9932
0.0114
198
5.0046
0.0113
199
5.0159
0.0113
200
5.0272
0.0113
201
5.0384
0.0113
202
5.0497
0.0112
203
5.0609
0.0112
204
5.0720
0.0112
205
5.0831
0.0111
206
5.0942
0.0111
207
5.1053
0.0111
208
5.1164
0.0110
209
5.1274
0.0110
210
5.1384
0.0110
211
5.1493
0.0110
212
5.1602
0.0109
213
5.1711
0.0109
214
5.1820
0.0109
215
5.1928
0.0108
216
5.2037
0.0108
217
5.2144
0.0108
218
5.2252
0.0108
219
5.2359
0.0107
220
5.2466
0.0107
221
5.2573
0.0107
222
5.2680
0.0107
223
5.2786
0.0106
224
5.2892
0.0106
225
5.2998
0.0106
226
5.3103
0.0105
227
5.3208
0.0105
228
5.3313
0.0105
229
5.3418
0.0105
230
5.3522
0.0104
231
5.3627
0.0104
232
5.3731
0.0104
233
5.3834
0.0104
234
5.3938
0.0103
235
5.4041
0.0103
236
5.4144
0.0103
237
5.4247
0.0103
238
5.4349
0.0102
239
5.4451
0.0102
240
5.4553
0.0102
241
5.4655
0.0102
242
5.4757
0.0102
243
5.4858
0.0101
244
5.4959
0.0101
245
5.5060
0.0101
246
5.5161
0.0101
247
5.5261
0.0100
248
5.5361
0.0100
249
5.5461
0.0100
250
5.5561
0.0100
251
5.5660
0.0100
252
5.5760
0.0099
253
5.5859
0.0099
254
5.5958
0.0099
255
5.6056
0.0099
256
5.6155
0.0098
257
5.6253
0.0098
258
5.6351
0.0098
259
5.6449
0.0098
260
5.6546
0.0098
261
5.6644
0.0097
262
5.6741
0.0097
263
5.6838
0.0097
264
5.6935
0.0097
265
5.7031
0.0097
266
5.7128
0.0096
267
5.7224
0.0096
268
5.7320
0.0096
269
5.7416
0.0096
270
5.7511
0.0096
271
5.7607
0.0095
272
5.7702
0.0095
273
5.7797
0.0095
274
5.7892
0.0095
275
5.7986
0.0095
276
5.8081
0.0094
277
5.8175
0.0094
278
5.8269
0.0094
279
5.8363
0.0094
280
5.8457
0.0094
281
5.8550
0.0093
282
5.8643
0.0093
283
5.8737
0.0093
284
5.8829
0.0093
285
5.8922
0.0093
286
5.9015
0.0093
287
5.9107
0.0092
288
5.9199
0.0092
Unit
Unit
Period
Rainfall
(number)
(In)
Unit Effective
Soil -Loss Rainfall
(In) (In)
1 0.0092
0.0031
0.0061
2 0.0092
0.0031
0.0061
3 0.0093
0.0032
0.0061
4 0.0093
0.0032
0.0061
5 0.0093
0.0032
0.0062
6 0.0093
0.0032
0.0062
7 0.0094
0.0032
0.0062
8 0.0094
0.0032
0.0062
9 0.0094
0.0032
0.0062
10 0.0095
0.0032
0.0062
11 0.0095
0.0032
0.0063
12 0.0095
0.0032
0.0063
13 0.0096
0.0032
0.0063
14 0.0096
0.0033
0.0063
15 0.0096
0.0033
0.0063
16 0.0096
0.0033
0.0064
17 0.0097
0.0033
0.0064
18 0.0097
0.0033
0.0064
19 0.0097
0.0033
0.0064
20 0.0098
0.0033
0.0064
21 0.0098
0.0033
0.0065
22 0.0098
0.0033
0.0065
23 0.0099
0.0034
0.0065
24 0.0099
0.0034
0.0065
25 0.0099
0.0034
0.0066
26 0.0100
0.0034
0.0066
27 0.0100
0.0034
0.0066
28 0.0100
0.0034
0.0066
29 0.0101
0.0034
0.0066
30 0.0101
0.0034
0.0067
31 0.0101
0.0034
0.0067
32 0.0102
0.0035
0.0067
33 0.0102
0.0035
0.0067
34 0.0102
0.0035
0.0068
35 0.0103
0.0035
0.0068
36 0.0103
0.0035
0.0068
37 0.0103
0.0035
0.0068
38 0.0104
0.0035
0.0068
39 0.0104
0.0035
0.0069
40 0.0104
0.0035
0.0069
41 0.0105
0.0036
0.0069
42 0.0105
0.0036
0.0069
43 0.0106
0.0036
0.0070
44 0.0106
0.0036
0.0070
45 0.0107
0.0036
0.0070
46 0.0107
0.0036
0.0070
47 0.0107
0.0036
0.0071
48 0.0108
0.0037
0.0071
49 0.0108
0.0037
0.0071
50 0.0108
0.0037
0.0072
51 0.0109
0.0037
0.0072
52 0.0109
0.0037
0.0072
53 0.0110
0.0037
0.0073
54 0.0110
0.0037
0.0073
55 0.0111
0.0038
0.0073
56 0.0111
0.0038
0.0073
57 0.0112
0.0038
0.0074
58 0.0112
0.0038
0.0074
59 0.0113
0.0038
0.0074
60 0.0113
0.0038
0.0074
61 0.0113
0.0039
0.0075
62 0.0114
0.0039
0.0075
63 0.0114
0.0039
0.0076
64 0.0115
0.0039
0.0076
65 0.0115
0.0039
0.0076
66 0.0116
0.0039
0.0076
67 0.0116
0.0040
0.0077
68 0.0117
0.0040
0.0077
69 0.0117
0.0040
0.0078
70 0.0118
0.0040
0.0078
71 0.0119
0.0040
0.0078
72 0.0119
0.0040
0.0078
73 0.0120
0.0041
0.0079
74 0.0120
0.0041
0.0079
75 0.0121
0.0041
0.0080
76 0.0121
0.0041
0.0080
77 0.0122
0.0041
0.0080
78 0.0122
0.0042
0.0081
79 0.0123
0.0042
0.0081
80 0.0123
0.0042
0.0081
81 0.0124
0.0042
0.0082
82 0.0125
0.0042
0.0082
83 0.0126
0.0043
0.0083
84 0.0126
0.0043
0.0083
85 0.0127
0.0043
0.0084
86 0.0127
0.0043
0.0084
87 0.0128
0.0044
0.0085
88 0.0129
0.0044
0.0085
89 0.0129
0.0044
0.0085
90 0.0130
0.0044
0.0086
91 0.0131
0.0044
0.0086
92 0.0131
0.0045
0.0087
93 0.0132
0.0045
0.0087
94 0.0133
0.0045
0.0088
95 0.0134
0.0045
0.0088
96 0.0134
0.0046
0.0089
97 0.0135
0.0046
0.0089
98 0.0136
0.0046
0.0090
99 0.0137
0.0047
0.0090
100
0.0137
0.0047
0.0091
101
0.0139
0.0047
0.0091
102
0.0139
0.0047
0.0092
103
0.0140
0.0048
0.0093
104
0.0141
0.0048
0.0093
105
0.0142
0.0048
0.0094
106
0.0143
0.0048
0.0094
107
0.0144
0.0049
0.0095
108
0.0144
0.0049
0.0095
109
0.0146
0.0050
0.0096
110
0.0146
0.0050
0.0097
111
0.0148
0.0050
0.0097
112
0.0148
0.0050
0.0098
113
0.0150
0.0051
0.0099
114
0.0150
0.0051
0.0099
115
0.0152
0.0052
0.0100
116
0.0153
0.0052
0.0101
117
0.0154
0.0052
0.0102
118
0.0155
0.0053
0.0102
119
0.0156
0.0053
0.0103
120
0.0157
0.0053
0.0104
121
0.0159
0.0054
0.0105
122
0.0160
0.0054
0.0105
123
0.0161
0.0055
0.0106
124
0.0162
0.0055
0.0107
125
0.0164
0.0056
0.0108
126
0.0165
0.0056
0.0109
127
0.0167
0.0057
0.0110
128
0.0167
0.0057
0.0111
129
0.0169
0.0058
0.0112
130
0.0170
0.0058
0.0112
131
0.0172
0.0059
0.0114
132
0.0173
0.0059
0.0115
133
0.0176
0.0060
0.0116
134
0.0177
0.0060
0.0117
135
0.0179
0.0061
0.0118
136
0.0180
0.0061
0.0119
137
0.0182
0.0062
0.0120
138
0.0184
0.0062
0.0121
139
0.0186
0.0063
0.0123
140
0.0187
0.0064
0.0124
141
0.0190
0.0065
0.0126
142
0.0191
0.0065
0.0126
143
0.0194
0.0066
0.0128
144
0.0196
0.0067
0.0129
145
0.0210
0.0071
0.0139
146
0.0212
0.0072
0.0140
147
0.0215
0.0073
0.0142
148
0.0217
0.0074
0.0143
149
0.0220
0.0075
0.0145
150
0.0222
0.0075
0.0146
151
0.0226
0.0077
0.0149
152
0.0227
0.0077
0.0150
153
0.0231
0.0079
0.0153
154
0.0234
0.0079
0.0154
155
0.0238
0.0081
0.0157
156
0.0240
0.0082
0.0159
157
0.0245
0.0083
0.0162
158
0.0247
0.0084
0.0163
159
0.0252
0.0086
0.0167
160
0.0255
0.0087
0.0168
161
0.0261
0.0089
0.0172
162
0.0264
0.0090
0.0174
163
0.0270
0.0092
0.0178
164
0.0273
0.0093
0.0180
165
0.0280
0.0095
0.0185
166
0.0283
0.0096
0.0187
167
0.0291
0.0099
0.0192
168
0.0295
0.0100
0.0195
169
0.0304
0.0103
0.0201
170
0.0308
0.0105
0.0204
171
0.0318
0.0108
0.0210
172
0.0324
0.0110
0.0214
173
0.0335
0.0114
0.0221
174
0.0341
0.0116
0.0225
175
0.0354
0.0120
0.0234
176
0.0362
0.0123
0.0239
177
0.0377
0.0128
0.0249
178
0.0386
0.0131
0.0255
179
0.0406
0.0138
0.0268
180
0.0416
0.0142
0.0275
181
0.0441
0.0150
0.0291
182
0.0455
0.0154
0.0300
183
0.0487
0.0165
0.0321
184
0.0505
0.0172
0.0334
185
0.0465
0.0158
0.0307
186
0.0491
0.0167
0.0324
187
0.0558
0.0190
0.0368
188
0.0601
0.0204
0.0397
189
0.0725
0.0246
0.0478
190
0.0818
0.0262
0.0556
191
0.1169
0.0262
0.0907
192
0.1608
0.0262
0.1346
193
0.5032
0.0262
0.4770
194
0.0952
0.0262
0.0691
195
0.0655
0.0223
0.0433
196
0.0522
0.0177
0.0344
197
0.0526
0.0179
0.0347
198
0.0470
0.0160
0.0310
199
0.0428
0.0145
0.0283
200
0.0396
0.0134
0.0261
201
0.0369
0.0125
0.0244
202
0.0348
0.0118
0.0229
203
0.0329
0.0112
0.0217
204
0.0313
0.0106
0.0207
205
0.0299
0.0102
0.0198
206
0.0287
0.0098
0.0190
207
0.0276
0.0094
0.0182
208
0.0267
0.0091
0.0176
209
0.0258
0.0088
0.0170
210
0.0250
0.0085
0.0165
211
0.0242
0.0082
0.0160
212
0.0236
0.0080
0.0156
213
0.0229
0.0078
0.0151
214
0.0224
0.0076
0.0148
215
0.0218
0.0074
0.0144
216
0.0213
0.0072
0.0141
217
0.0197
0.0067
0.0130
218
0.0193
0.0066
0.0127
219
0.0189
0.0064
0.0125
220
0.0185
0.0063
0.0122
221
0.0181
0.0062
0.0120
222
0.0178
0.0060
0.0117
223
0.0175
0.0059
0.0115
224
0.0171
0.0058
0.0113
225
0.0168
0.0057
0.0111
226
0.0166
0.0056
0.0109
227
0.0163
0.0055
0.0108
228
0.0160
0.0054
0.0106
229
0.0158
0.0054
0.0104
230
0.0156
0.0053
0.0103
231
0.0153
0.0052
0.0101
232
0.0151
0.0051
0.0100
233
0.0149
0.0051
0.0098
234
0.0147
0.0050
0.0097
235
0.0145
0.0049
0.0096
236
0.0143
0.0049
0.0095
237
0.0141
0.0048
0.0093
238
0.0140
0.0047
0.0092
239
0.0138
0.0047
0.0091
240
0.0136
0.0046
0.0090
241
0.0135
0.0046
0.0089
242
0.0133
0.0045
0.0088
243
0.0132
0.0045
0.0087
244
0.0130
0.0044
0.0086
245
0.0129
0.0044
0.0085
246
0.0128
0.0043
0.0084
247
0.0126
0.0043
0.0083
248
0.0125
0.0043
0.0083
249
0.0124
0.0042
0.0082
250
0.0123
0.0042
0.0081
251
0.0121
0.0041
0.0080
252
0.0120
0.0041
0.0079
253
0.0119
0.0041
0.0079
254
0.0118
0.0040
0.0078
255
0.0117
0.0040
0.0077
256
0.0116
0.0039
0.0077
257
0.0115
0.0039
0.0076
258
0.0114
0.0039
0.0075
259
0.0113
0.0038
0.0075
260
0.0112
0.0038
0.0074
261
0.0111
0.0038
0.0073
262
0.0110
0.0038
0.0073
263
0.0110
0.0037
0.0072
264
0.0109
0.0037
0.0072
265
0.0108
0.0037
0.0071
266
0.0107
0.0036
0.0071
267
0.0106
0.0036
0.0070
268
0.0105
0.0036
0.0070
269
0.0105
0.0036
0.0069
270
0.0104
0.0035
0.0069
271
0.0103
0.0035
0.0068
272
0.0102
0.0035
0.0068
273
0.0102
0.0035
0.0067
274
0.0101
0.0034
0.0067
275
0.0100
0.0034
0.0066
276
0.0100
0.0034
0.0066
277
0.0099
0.0034
0.0065
278
0.0098
0.0033
0.0065
279
0.0098
0.0033
0.0065
280
0.0097
0.0033
0.0064
281
0.0097
0.0033
0.0064
282
0.0096
0.0033
0.0063
283
0.0095
0.0032
0.0063
284
0.0095
0.0032
0.0063
285
0.0094
0.0032
0.0062
286
0.0094
0.0032
0.0062
287
0.0093
0.0032
0.0061
288
0.0093
0.0031
0.0061
-------------------------------------------------------------------- Total soil rain loss = 1.82(In)
Total effective rainfall = 4.10(In)
Peak flow rate in flood hydrograph = 20.57(CFS)
--------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 24 -
H O U
R S T 0 R M
R
u n o f
f
H y d r o g r a p h
-------------------------------------------------------------------- Hydrograph in
5 Minute intervals ((CFS))
-------------------------------------------------------------------- Time(h+m)
Volume Ac.Ft
Q(CFS)
0 7.5 15.0 22.5 30.0
----------------------------------------------------------------------- 0+ 5
0.0002
0.03 Q
0+10
0.0016
0.20 Q
0+15
0.0044
0.41 Q
0+20
0.0078
0.49 Q
0+25
0.0113
0.51 Q
0+30
0.0149
0.52 Q
0+35
0.0185
0.52 Q
0+40
0.0221
0.52 Q
0+45
0.0257
0.52 Q
0+50
0.0293
0.53 Q
0+55
0.0329
0.53 Q
1+ 0
0.0365
0.53 Q
1+ 5
0.0402
0.53 Q
1+10
0.0439
0.53 Q
1+15
0.0475
0.53 Q
1+20
0.0512
0.54 Q
1+25
0.0549
0.54 Q
1+30
0.0586
0.54 Q
1+35
0.0623
0.54 QV
1+40
0.0661
0.54 QV
1+45
0.0698
0.54 QV
1+50
0.0736
0.55 QV
1+55
0.0773
0.55 QV
2+ 0
0.0811
0.55 QV
2+ 5
0.0849
0.55 QV
2+10
0.0887
0.55 QV
2+15
0.0925
0.55 QV
2+20
0.0964
0.56 QV
2+25
0.1002
0.56 QV
2+30
0.1041
0.56 QV
2+35
0.1079
0.56 QV
2+40
0.1118
0.56 QV
2+45
0.1157
0.57 QV
2+50
0.1196
0.57 Q
V
2+55
0.1235
0.57 Q
V
3+ 0
0.1275
0.57 Q
V
3+ 5
0.1314
0.57 Q
V
3+10
0.1354
0.58 Q
V
3+15
0.1394
0.58 Q
V
3+20
0.1433
0.58 Q
V
3+25
0.1474
0.58 Q
V
3+30
0.1514
0.58 Q
V
3+35
0.1554
0.59 Q
V
3+40
0.1595
0.59 Q
V
3+45
0.1635
0.59 Q
V
3+50
0.1676
0.59 Q
V
3+55
0.1717
0.59 Q
V
4+ 0
0.1758
0.60 Q
V
4+ 5
0.1799
0.60 Q
V
4+10
0.1841
0.60 Q
V
4+15
0.1882
0.60 Q
V
4+20
0.1924
0.61 Q
V
4+25
0.1966
0.61 Q
V
4+30
0.2008
0.61 Q
V
4+35
0.2050
0.61 Q
V
4+40
0.2093
0.62 Q
V
4+45
0.2135
0.62 Q
V
4+50
0.2178
0.62 Q
V
4+55
0.2221
0.62 Q
V
5+ 0
0.2264
0.63 Q
V
5+ 5
0.2307
0.63 Q
V
5+10
0.2350
0.63 Q
V
5+15
0.2394
0.63 Q
V
5+20
0.2438
0.64 Q
V
5+25
0.2482
0.64 Q
V
5+30
0.2526
0.64 Q
V
5+35
0.2570
0.64 Q
V
5+40
0.2615
0.65 Q
V
5+45
0.2660
0.65 Q
V
5+50
0.2705
0.65 Q
V
5+55
0.2750
0.66 Q
V
6+ 0
0.2795
0.66 Q
V
6+ 5
0.2841
0.66 Q
V
6+10
0.2886
0.66 Q
V
6+15
0.2932
0.67 Q
V
6+20
0.2979
0.67 Q
V
6+25
0.3025
0.67 Q
V
6+30
0.3072
0.68 Q
V
6+35
0.3118
0.68 Q
V
6+40
0.3166
0.68 Q
V
6+45
0.3213
0.69 6+50
0.3260
0.69 6+55
0.3308
0.69 7+ 0
0.3356
0.70 7+ 5
0.3404
0.70 7+10
0.3453
0.70 7+15
0.3502
0.71 7+20
0.3551
0.71 7+25
0.3600
0.72 7+30
0.3649
0.72 7+35
0.3699
0.72 7+40
0.3749
0.73 7+45
0.3799
0.73 7+50
0.3850
0.73 7+55
0.3901
0.74 8+ 0
0.3952
0.74 8+ 5
0.4003
0.75 8+10
0.4055
0.75 8+15
0.4107
0.76 8+20
0.4159
0.76 8+25
0.4212
0.76 8+30
0.4265
0.77 8+35
0.4318
0.77 8+40
0.4372
0.78 8+45
0.4426
0.78 8+50
0.4480
0.79 8+55
0.4535
0.79 9+ 0
0.4590
0.80 9+ 5
0.4645
0.80 9+10
0.4701
0.81 9+15
0.4757
0.81 9+20
0.4813
0.82 9+25
0.4870
0.82 9+30
0.4927
0.83 9+35
0.4984
0.84 9+40
0.5042
0.84 9+45
0.5101
0.85 9+50
0.5159
0.85 9+55
0.5219
0.86 10+ 0
0.5278
0.87 10+ 5
0.5338
0.87 10+10
0.5399
0.88 10+15
0.5460
0.89 10+20
0.5521
0.89 10+25
0.5583
0.90 10+30
0.5646
0.91 10+35
0.5709
0.91 10+40
0.5772
0.92 10+45
0.5836
0.93 10+50
0.5901
0.94 4
M
4 M
4 �M
1Tj
10+55
0.5966
0.95 11+ 0
0.6032
0.95 11+ 5
0.6098
0.96 11+10
0.6165
0.97 11+15
0.6232
0.98 11+20
0.6301
0.99 11+25
0.6369
1.00 11+30
0.6439
1.01 11+35
0.6509
1.02 11+40
0.6580
1.03 11+45
0.6651
1.04 11+50
0.6724
1.05 11+55
0.6797
1.06 12+ 0
0.6871
1.07 12+ 5
0.6946
1.09 12+10
0.7023
1.12 12+15
0.7103
1.16 12+20
0.7184
1.18 12+25
0.7267
1.20 12+30
0.7350
1.21 12+35
0.7435
1.23 12+40
0.7521
1.24 12+45
0.7607
1.26 12+50
0.7695
1.28 12+55
0.7784
1.29 13+ 0
0.7874
1.31 13+ 5
0.7966
1.33 13+10
0.8059
1.35 13+15
0.8153
1.37 13+20
0.8248
1.39 13+25
0.8345
1.41 13+30
0.8444
1.43 13+35
0.8544
1.46 13+40
0.8646
1.48 13+45
0.8750
1.51 13+50
0.8855
1.53 13+55
0.8963
1.56 14+ 0
0.9073
1.59 14+ 5
0.9185
1.63 14+10
0.9299
1.66 14+15
0.9416
1.70 14+20
0.9535
1.74 14+25
0.9658
1.78 14+30
0.9783
1.82 14+35
0.9912
1.87 14+40
1.0045
1.92 14+45
1.0181
1.98 14+50
1.0322
2.04 14+55
1.0467
2.11 15+ 0
1.0618
2.19 VI
M
4 4
M
4 4
15+ 5
1.0774
2.27 Q
15+10
1.0937
2.36 Q
15+15
1.1107
2.47 Q
15+20
1.1285
2.59 Q
15+25
1.1471
2.70 Q
15+30
1.1658
2.71 Q
15+35
1.1844
2.71 Q
15+40
1.2043
2.88 Q
15+45
1.2261
3.17 Q
15+50
1.2508
3.59 Q
15+55
1.2806
4.32 Q
16+ 0
1.3213
5.91 16+ 5
1.3918
10.23 16+10
1.5273
19.67 16+15
1.6689
20.57 16+20
1.7402
10.34 16+25
1.7759
5.19 16+30
1.8004
3.56 Q
16+35
1.8213
3.03 Q
16+40
1.8392
2.60 Q
16+45
1.8556
2.38 Q
16+50
1.8707
2.20 Q
16+55
1.8849
2.05 Q
17+ 0
1.8982
1.93 Q
17+ 5
1.9107
1.83 Q
17+10
1.9227
1.74 Q
17+15
1.9342
1.66 Q
17+20
1.9452
1.60 Q
17+25
1.9557
1.54 Q
17+30
1.9659
1.48 IQ
17+35
1.9758
1.43 IQ
17+40
1.9854
1.39 IQ
17+45
1.9946
1.35 IQ
17+50
2.0037
1.31 IQ
17+55
2.0125
1.28 IQ
18+ 0
2.0210
1.24 IQ
18+ 5
2.0294
1.21 IQ
18+10
2.0374
1.16 IQ
18+15
2.0450
1.11 IQ
18+20
2.0524
1.08 IQ
18+25
2.0597
1.05 IQ
18+30
2.0667
1.03 IQ
18+35
2.0737
1.01 IQ
18+40
2.0805
0.99 IQ
18+45
2.0872
0.97 IQ
18+50
2.0938
0.95 IQ
18+55
2.1002
0.94 IQ
19+ 0
2.1066
0.92 IQ
19+ 5
2.1128
0.91 IQ
19+10
2.1190
0.89 IQ
Q
V
Q
V
Q
Q
VQ
Q
VI
VI
V
V
V
19+15
2.1250
0.88 19+20
2.1310
0.87 19+25
2.1369
0.85 19+30
2.1427
0.84 19+35
2.1484
0.83 19+40
2.1540
0.82 19+45
2.1596
0.81 19+50
2.1651
0.80 19+55
2.1705
0.79 20+ 0
2.1759
0.78 20+ 5
2.1812
0.77 20+10
2.1864
0.76 20+15
2.1916
0.75 20+20
2.1967
0.74 20+25
2.2017
0.73 20+30
2.2067
0.73 20+35
2.2117
0.72 20+40
2.2166
0.71 20+45
2.2214
0.70 20+50
2.2262
0.70 20+55
2.2310
0.69 21+ 0
2.2357
0.68 21+ 5
2.2404
0.68 21+10
2.2450
0.67 21+15
2.2496
0.66 21+20
2.2541
0.66 21+25
2.2586
0.65 21+30
2.2630
0.65 21+35
2.2675
0.64 21+40
2.2718
0.64 21+45
2.2762
0.63 21+50
2.2805
0.63 21+55
2.2848
0.62 22+ 0
2.2890
0.62 22+ 5
2.2932
0.61 22+10
2.2974
0.61 22+15
2.3015
0.60 22+20
2.3056
0.60 22+25
2.3097
0.59 22+30
2.3137
0.59 22+35
2.3178
0.58 22+40
2.3218
0.58 22+45
2.3257
0.58 22+50
2.3297
0.57 22+55
2.3336
0.57 23+ 0
2.3374
0.56 23+ 5
2.3413
0.56 23+10
2.3451
0.56 23+15
2.3489
0.55 23+20
2.3527
0.55 23+25
2.3565
0.55 Q I
I I VI
23+30
2.3602
0.54 Q I
I I VI
23+35
2.3639
0.54 Q I
I I VI
23+40
2.3676
0.54 Q I
I I VI
23+45
2.3713
0.53 Q I
I I VI
23+50
2.3749
0.53 Q I
I I VI
23+55
2.3785
0.53 Q I
I I VI
24+ 0
2.3821
0.52 Q I
I I VI
24+ 5
2.3855
0.49 Q I
I I VI
24+10
2.3876
0.32 Q I
I I VI
24+15
2.3884
0.11 Q I
I I VI
24+20
2.3886
0.03 Q I
I I VI
24+25
2.3886
0.01 Q I
I I VI
24+30
-----------------------------------------------------------------------
2.3886
0.00 Q I
I I V
FLOOD HYDROGRAPH ROUTING PROGRAM
Copyright (c) CIVILCADD/CIVILDESIGN, 1989 - 2018
Study date: 08/22/22
TTM 20372
Basin Routing - DA 1
2 yr
24 hr
Program License Serial Number 6481
-------------------------------------------------------------------- ********************* HYDROGRAPH INFORMATION ********************** From study/file name: 173postuh1242.rte
****************************HYDROGRAPH DATA**************************** Number of intervals = 294
Time interval = 5.0 (Min.)
Maximum/Peak flow rate = 6.336 (CFS)
Total volume = 0.907 (Ac.Ft)
Status of hydrographs being held in storage
Stream 1 Stream 2 Stream 3 Stream 4 Stream 5
Peak (CFS) 0.000 0.000 0.000 0.000 0.000
Vol (Ac.Ft) 0.000 0.000 0.000 0.000 0.000
*********************************************************************** ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 201.000 to Point/Station 202.000 **** RETARDING BASIN ROUTING ****
User entry of depth -outflow -storage data
-------------------------------------------------------------------- Total number of inflow hydrograph intervals = 294
Hydrograph time unit = 5.000 (Min.)
Initial depth in storage basin = 0.00(Ft.)
-------------------------------------------------------------------- -------------------------------------------------------------------- Initial
basin
depth =
0.00 (Ft.)
Initial
basin
storage
= 0.00 (Ac.Ft)
Initial
basin
outflow
= 0.00 (CFS)
-------------------------------------------------------------------- Depth vs. Storage and
Depth vs.
Discharge
data:
Basin Depth
Storage
Outflow
(S-0*dt/2)
(S+0*dt/2)
(Ft.)
--------------------------------------------------------------------- (Ac.Ft)
(CFS)
(Ac.Ft)
(Ac.Ft)
0.000
0.000
0.000
0.000
0.000
3.000
0.056
0.076
0.056
0.056
4.000
0.070
0.076
0.070
0.070
5.000
0.127
0.076
0.127
0.127
6.000
0.207
0.076
0.207
0.207
6.170
0.225
0.821
0.222
0.228
6.330
0.243
2.194
0.235
0.251
7.000
0.314
2.194
0.306
0.322
8.000
0.448
2.194
0.440
0.456
8.170
0.476
4.438
0.461
0.491
8.330
0.503
8.885
0.472
0.534
9.000
0.613
17.000
0.554
0.672
Hydrograph Detention Basin Routing
Graph values: 'I'=
unit inflow; 'O'=outflow at time shown
Time
--------------------------------------------------------------------- Inflow
Outflow
Storage
Depth
(Hours)
(CFS)
(CFS)
(Ac.Ft)
.0 1.6 3.17 4.75
6.34 (Ft.)
0.083
0.01 0.00
0.000
0 0.00
0.167
0.07 0.00
0.000
0 0.02
0.250
0.15 0.00
0.001
0 0.06
0.333
0.19 0.00
0.002
0 0.12
0.417
0.19 0.00
0.004
0 0.19
0.500
0.20 0.01
0.005
0 0.26
0.583
0.20 0.01
0.006
OI
0.33 0.667
0.20 0.01
0.007
OI
0.40 0.750
0.20 0.01
0.009
OI
0.47 0.833
0.20 0.01
0.010
OI
0.54 0.917
0.20 0.02
0.011
OI
0.61 1.000
0.20 0.02
0.013
OI
0.68 1.083
0.20 0.02
0.014
OI
0.75 1.167
0.20 0.02
0.015
OI
0.81 1.250
0.20 0.02
0.016
OI
0.88 1.333
0.20 0.02
0.018
OI
0.95 1.417
0.21 0.03
0.019
OI
1.01 1.500
0.21 0.03
0.020
OI
1.08 1.583
0.21 0.03
0.021
OI
1.15 1.667
0.21 0.03
0.023
OI
1.21 1.750
0.21 0.03
0.024
OI
1.28 1.833
0.21 0.03
0.025
OI
1.34 1.917
0.21 0.04
0.026
OI
1.41 2.000
0.21 0.04
0.027
OI I I I
I 1.47
2.083
0.21 0.04
0.029
01 1.53
2.167
0.21 0.04
0.030
01 1.60
2.250
0.21 0.04
0.031
01 1.66
2.333
0.21 0.04
0.032
01 1.72
2.417
0.21 0.05
0.033
01 1.78
2.500
0.21 0.05
0.034
01 1.85
2.583
0.21 0.05
0.036
01 1.91
2.667
0.22 0.05
0.037
01 1.97
2.750
0.22 0.05
0.038
01 2.03
2.833
0.22 0.05
0.039
01 2.09
2.917
0.22 0.05
0.040
01 2.15
3.000
0.22 0.06
0.041
01 2.21
3.083
0.22 0.06
0.042
01 2.27
3.167
0.22 0.06
0.043
01 2.33
3.250
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29.167
0.00 0.08
0.178
0 5.63
29.250
0.00 0.08
0.177
0 5.63
29.333
0.00 0.08
0.177
0 5.62
29.417
0.00 0.08
0.176
0 5.61
29.500
0.00 0.08
0.176
0 5.61
29.583
0.00 0.08
0.175
0 5.60
29.667
0.00 0.08
0.175
0 5.59
29.750
0.00 0.08
0.174
0 5.59
29.833
0.00 0.08
0.173
0 5.58
29.917
0.00 0.08
0.173
0 5.57
30.000
0.00 0.08
0.172
0 5.57
30.083
0.00 0.08
0.172
0 5.56
30.167
0.00 0.08
0.171
0 5.55
30.250
0.00 0.08
0.171
0 5.55
30.333
0.00 0.08
0.170
0 5.54
30.417
0.00 0.08
0.170
0 5.54
30.500
0.00 0.08
0.169
0 5.53
30.583
0.00 0.08
0.169
0 5.52
30.667
0.00 0.08
0.168
0 5.52
30.750
0.00 0.08
0.168
0 5.51
30.833
0.00 0.08
0.167
0 5.50
30.917
0.00 0.08
0.167
0 5.50
31.000
0.00 0.08
0.166
0 5.49
31.083
0.00 0.08
0.166
0 5.48
31.167
0.00 0.08
0.165
0 I I
I I 5.48
31.250
0.00 0.08
0.165
0 5.47
31.333
0.00 0.08
0.164
0 5.46
31.417
0.00 0.08
0.164
0 5.46
31.500
0.00 0.08
0.163
0 5.45
31.583
0.00 0.08
0.162
0 5.44
31.667
0.00 0.08
0.162
0 5.44
31.750
0.00 0.08
0.161
0 5.43
31.833
0.00 0.08
0.161
0 5.42
31.917
0.00 0.08
0.160
0 5.42
32.000
0.00 0.08
0.160
0 5.41
32.083
0.00 0.08
0.159
0 5.40
32.167
0.00 0.08
0.159
0 5.40
32.250
0.00 0.08
0.158
0 5.39
32.333
0.00 0.08
0.158
0 5.38
32.417
0.00 0.08
0.157
0 5.38
32.500
0.00 0.08
0.157
0 5.37
32.583
0.00 0.08
0.156
0 5.36
32.667
0.00 0.08
0.156
0 5.36
32.750
0.00 0.08
0.155
0 5.35
32.833
0.00 0.08
0.155
0 5.35
32.917
0.00 0.08
0.154
0 5.34
33.000
0.00 0.08
0.154
0 5.33
33.083
0.00 0.08
0.153
0 5.33
33.167
0.00 0.08
0.153
0 5.32
33.250
0.00 0.08
0.152
0 5.31
33.333
0.00 0.08
0.151
0 5.31
33.417
0.00 0.08
0.151
0 5.30
33.500
0.00 0.08
0.150
0 5.29
33.583
0.00 0.08
0.150
0 5.29
33.667
0.00 0.08
0.149
0 5.28
33.750
0.00 0.08
0.149
0 5.27
33.833
0.00 0.08
0.148
0 5.27
33.917
0.00 0.08
0.148
0 5.26
34.000
0.00 0.08
0.147
0 5.25
34.083
0.00 0.08
0.147
0 5.25
34.167
0.00 0.08
0.146
0 5.24
34.250
0.00 0.08
0.146
0 5.23
34.333
0.00 0.08
0.145
0 5.23
34.417
0.00 0.08
0.145
0 5.22
34.500
0.00 0.08
0.144
0 5.21
34.583
0.00 0.08
0.144
0 5.21
34.667
0.00 0.08
0.143
0 5.20
34.750
0.00 0.08
0.143
0 5.19
34.833
0.00 0.08
0.142
0 5.19
34.917
0.00 0.08
0.142
0 5.18
35.000
0.00 0.08
0.141
0 5.18
35.083
0.00 0.08
0.140
0 5.17
35.167
0.00 0.08
0.140
0 5.16
35.250
0.00 0.08
0.139
0 5.16
35.333
0.00 0.08
0.139
0 I I
I I 5.15
35.417
0.00 0.08
0.138
0 5.14
35.500
0.00 0.08
0.138
0 5.14
35.583
0.00 0.08
0.137
0 5.13
35.667
0.00 0.08
0.137
0 5.12
35.750
0.00 0.08
0.136
0 5.12
35.833
0.00 0.08
0.136
0 5.11
35.917
0.00 0.08
0.135
0 5.10
36.000
0.00 0.08
0.135
0 5.10
36.083
0.00 0.08
0.134
0 5.09
36.167
0.00 0.08
0.134
0 5.08
36.250
0.00 0.08
0.133
0 5.08
36.333
0.00 0.08
0.133
0 5.07
36.417
0.00 0.08
0.132
0 5.06
36.500
0.00 0.08
0.132
0 5.06
36.583
0.00 0.08
0.131
0 5.05
36.667
0.00 0.08
0.131
0 5.04
36.750
0.00 0.08
0.130
0 5.04
36.833
0.00 0.08
0.130
0 5.03
36.917
0.00 0.08
0.129
0 5.02
37.000
0.00 0.08
0.128
0 5.02
37.083
0.00 0.08
0.128
0 5.01
37.167
0.00 0.08
0.127
0 5.01
37.250
0.00 0.08
0.127
0 5.00
37.333
0.00 0.08
0.126
0 4.99
37.417
0.00 0.08
0.126
0 4.98
37.500
0.00 0.08
0.125
0 4.97
37.583
0.00 0.08
0.125
0 4.96
37.667
0.00 0.08
0.124
0 4.95
37.750
0.00 0.08
0.124
0 4.94
37.833
0.00 0.08
0.123
0 4.93
37.917
0.00 0.08
0.123
0 4.92
38.000
0.00 0.08
0.122
0 4.92
38.083
0.00 0.08
0.122
0 4.91
38.167
0.00 0.08
0.121
0 4.90
38.250
0.00 0.08
0.121
0 4.89
38.333
0.00 0.08
0.120
0 4.88
38.417
0.00 0.08
0.120
0 4.87
38.500
0.00 0.08
0.119
0 4.86
38.583
0.00 0.08
0.119
0 4.85
38.667
0.00 0.08
0.118
0 4.84
38.750
0.00 0.08
0.117
0 4.83
38.833
0.00 0.08
0.117
0 4.82
38.917
0.00 0.08
0.116
0 4.81
39.000
0.00 0.08
0.116
0 4.81
39.083
0.00 0.08
0.115
0 4.80
39.167
0.00 0.08
0.115
0 4.79
39.250
0.00 0.08
0.114
0 4.78
39.333
0.00 0.08
0.114
0 4.77
39.417
0.00 0.08
0.113
0 4.76
39.500
0.00 0.08
0.113
0 I I
I I 4.75
39.583
0.00 0.08
0.112
0 4.74
39.667
0.00 0.08
0.112
0 4.73
39.750
0.00 0.08
0.111
0 4.72
39.833
0.00 0.08
0.111
0 4.71
39.917
0.00 0.08
0.110
0 4.70
40.000
0.00 0.08
0.110
0 4.70
40.083
0.00 0.08
0.109
0 4.69
40.167
0.00 0.08
0.109
0 4.68
40.250
0.00 0.08
0.108
0 4.67
40.333
0.00 0.08
0.108
0 4.66
40.417
0.00 0.08
0.107
0 4.65
40.500
0.00 0.08
0.106
0 4.64
40.583
0.00 0.08
0.106
0 4.63
40.667
0.00 0.08
0.105
0 4.62
40.750
0.00 0.08
0.105
0 4.61
40.833
0.00 0.08
0.104
0 4.60
40.917
0.00 0.08
0.104
0 4.59
41.000
0.00 0.08
0.103
0 4.58
41.083
0.00 0.08
0.103
0 4.58
41.167
0.00 0.08
0.102
0 4.57
41.250
0.00 0.08
0.102
0 4.56
41.333
0.00 0.08
0.101
0 4.55
41.417
0.00 0.08
0.101
0 4.54
41.500
0.00 0.08
0.100
0 4.53
41.583
0.00 0.08
0.100
0 4.52
41.667
0.00 0.08
0.099
0 4.51
41.750
0.00 0.08
0.099
0 4.50
41.833
0.00 0.08
0.098
0 4.49
41.917
0.00 0.08
0.098
0 4.48
42.000
0.00 0.08
0.097
0 4.47
42.083
0.00 0.08
0.097
0 4.47
42.167
0.00 0.08
0.096
0 4.46
42.250
0.00 0.08
0.095
0 4.45
42.333
0.00 0.08
0.095
0 4.44
42.417
0.00 0.08
0.094
0 4.43
42.500
0.00 0.08
0.094
0 4.42
42.583
0.00 0.08
0.093
0 4.41
42.667
0.00 0.08
0.093
0 4.40
42.750
0.00 0.08
0.092
0 4.39
42.833
0.00 0.08
0.092
0 4.38
42.917
0.00 0.08
0.091
0 4.37
43.000
0.00 0.08
0.091
0 4.36
43.083
0.00 0.08
0.090
0 4.36
43.167
0.00 0.08
0.090
0 4.35
43.250
0.00 0.08
0.089
0 4.34
43.333
0.00 0.08
0.089
0 4.33
43.417
0.00 0.08
0.088
0 4.32
43.500
0.00 0.08
0.088
0 4.31
43.583
0.00 0.08
0.087
0 4.30
43.667
0.00 0.08
0.087
0 I I
I I 4.29
43.750
0.00 0.08
0.086
0 4.28
43.833
0.00 0.08
0.086
0 4.27
43.917
0.00 0.08
0.085
0 4.26
44.000
0.00 0.08
0.084
0 4.25
44.083
0.00 0.08
0.084
0 4.25
44.167
0.00 0.08
0.083
0 4.24
44.250
0.00 0.08
0.083
0 4.23
44.333
0.00 0.08
0.082
0 4.22
44.417
0.00 0.08
0.082
0 4.21
44.500
0.00 0.08
0.081
0 4.20
44.583
0.00 0.08
0.081
0 4.19
44.667
0.00 0.08
0.080
0 4.18
44.750
0.00 0.08
0.080
0 4.17
44.833
0.00 0.08
0.079
0 4.16
44.917
0.00 0.08
0.079
0 4.15
45.000
0.00 0.08
0.078
0 4.14
45.083
0.00 0.08
0.078
0 4.13
45.167
0.00 0.08
0.077
0 4.13
45.250
0.00 0.08
0.077
0 4.12
45.333
0.00 0.08
0.076
0 4.11
45.417
0.00 0.08
0.076
0 4.10
45.500
0.00 0.08
0.075
0 4.09
45.583
0.00 0.08
0.075
0 4.08
45.667
0.00 0.08
0.074
0 4.07
45.750
0.00 0.08
0.073
0 4.06
45.833
0.00 0.08
0.073
0 4.05
45.917
0.00 0.08
0.072
0 4.04
46.000
0.00 0.08
0.072
0 4.03
46.083
0.00 0.08
0.071
0 4.02
46.167
0.00 0.08
0.071
0 4.02
46.250
0.00 0.08
0.070
0 4.01
46.333
0.00 0.08
0.070
0 3.99
46.417
0.00 0.08
0.069
0 3.95
46.500
0.00 0.08
0.069
0 3.91
46.583
0.00 0.08
0.068
0 3.88
46.667
0.00 0.08
0.068
0 3.84
46.750
0.00 0.08
0.067
0 3.80
46.833
0.00 0.08
0.067
0 3.76
46.917
0.00 0.08
0.066
0 3.73
47.000
0.00 0.08
0.066
0 3.69
47.083
0.00 0.08
0.065
0 3.65
47.167
0.00 0.08
0.065
0 3.61
47.250
0.00 0.08
0.064
0 3.58
47.333
0.00 0.08
0.064
0 3.54
47.417
0.00 0.08
0.063
0 3.50
47.500
0.00 0.08
0.063
0 3.46
47.583
0.00 0.08
0.062
0 3.43
47.667
0.00 0.08
0.061
0 3.39
47.750
0.00 0.08
0.061
0 3.35
47.833
0.00 0.08
0.060
0 I I
I I 3.32
47.917
0.00 0.08
0.060
0 3.28
48.000
0.00 0.08
0.059
0 3.24
48.083
0.00 0.08
0.059
0 3.20
48.167
0.00 0.08
0.058
0 3.17
48.250
0.00 0.08
0.058
0 3.13
48.333
0.00 0.08
0.057
0 3.09
48.417
0.00 0.08
0.057
0 3.05
48.500
0.00 0.08
0.056
0 3.02
48.583
0.00 0.08
0.056
0 2.98
48.667
0.00 0.07
0.055
0 2.96
48.750
0.00 0.07
0.055
0 2.93
48.833
0.00 0.07
0.054
0 2.90
48.917
0.00 0.07
0.054
0 2.87
49.000
0.00 0.07
0.053
0 2.85
49.083
0.00 0.07
0.053
0 2.82
49.167
0.00 0.07
0.052
0 2.80
49.250
0.00 0.07
0.052
0 2.77
49.333
0.00 0.07
0.051
0 2.74
49.417
0.00 0.07
0.051
0 2.72
49.500
0.00 0.07
0.050
0 2.69
49.583
0.00 0.07
0.050
0 2.67
49.667
0.00 0.07
0.049
0 2.64
49.750
0.00 0.07
0.049
0 2.62
49.833
0.00 0.07
0.048
0 2.59
49.917
0.00 0.07
0.048
0 2.57
50.000
0.00 0.06
0.048
0 2.55
50.083
0.00 0.06
0.047
0 2.52
50.167
0.00 0.06
0.047
0 2.50
50.250
0.00 0.06
0.046
0 2.48
50.333
0.00 0.06
0.046
0 2.45
50.417
0.00 0.06
0.045
0 2.43
50.500
0.00 0.06
0.045
0 2.41
50.583
0.00 0.06
0.045
0 2.38
50.667
0.00 0.06
0.044
0 2.36
50.750
0.00 0.06
0.044
0 2.34
50.833
0.00 0.06
0.043
0 2.32
50.917
0.00 0.06
0.043
0 2.30
51.000
0.00 0.06
0.042
0 2.28
51.083
0.00 0.06
0.042
0 2.25
51.167
0.00 0.06
0.042
0 2.23
51.250
0.00 0.06
0.041
0 2.21
51.333
0.00 0.06
0.041
0 2.19
51.417
0.00 0.06
0.041
0 2.17
51.500
0.00 0.05
0.040
0 2.15
51.583
0.00 0.05
0.040
0 2.13
51.667
0.00 0.05
0.039
0 2.11
51.750
0.00 0.05
0.039
0 2.09
51.833
0.00 0.05
0.039
0 2.07
51.917
0.00 0.05
0.038
0 2.05
52.000
0.00 0.05
0.038
0 I I
I I 2.03
52.083
0.00 0.05
0.038
0 2.02
52.167
0.00 0.05
0.037
0 2.00
52.250
0.00 0.05
0.037
0 1.98
52.333
0.00 0.05
0.037
0 1.96
52.417
0.00 0.05
0.036
0 1.94
52.500
0.00 0.05
0.036
0 1.92
52.583
0.00 0.05
0.036
0 1.91
52.667
0.00 0.05
0.035
0 1.89
52.750
0.00 0.05
0.035
0 1.87
52.833
0.00 0.05
0.035
0 1.85
52.917
0.00 0.05
0.034
0 1.84
53.000
0.00 0.05
0.034
0 1.82
53.083
0.00 0.05
0.034
0 1.80
53.167
0.00 0.05
0.033
0 1.78
53.250
0.00 0.04
0.033
0 1.77
53.333
0.00 0.04
0.033
0 1.75
53.417
0.00 0.04
0.032
0 1.74
53.500
0.00 0.04
0.032
0 1.72
53.583
0.00 0.04
0.032
0 1.70
53.667
0.00 0.04
0.031
0 1.69
53.750
0.00 0.04
0.031
0 1.67
53.833
0.00 0.04
0.031
0 1.66
53.917
0.00 0.04
0.031
0 1.64
54.000
0.00 0.04
0.030
0 1.63
54.083
0.00 0.04
0.030
0 1.61
54.167
0.00 0.04
0.030
0 1.60
54.250
0.00 0.04
0.030
0 1.58
54.333
0.00 0.04
0.029
0 1.57
54.417
0.00 0.04
0.029
0 1.55
54.500
0.00 0.04
0.029
0 1.54
54.583
0.00 0.04
0.028
0 1.52
54.667
0.00 0.04
0.028
0 1.51
54.750
0.00 0.04
0.028
0 1.49
54.833
0.00 0.04
0.028
0 1.48
54.917
0.00 0.04
0.027
0 1.47
55.000
0.00 0.04
0.027
0 1.45
55.083
0.00 0.04
0.027
0 1.44
55.167
0.00 0.04
0.027
0 1.43
55.250
0.00 0.04
0.026
0 1.41
55.333
0.00 0.04
0.026
0 1.40
55.417
0.00 0.04
0.026
0 1.39
55.500
0.00 0.03
0.026
0 1.37
55.583
0.00 0.03
0.025
0 1.36
55.667
0.00 0.03
0.025
0 1.35
55.750
0.00 0.03
0.025
0 1.34
55.833
0.00 0.03
0.025
0 1.32
55.917
0.00 0.03
0.024
0 1.31
56.000
0.00 0.03
0.024
0 1.30
56.083
0.00 0.03
0.024
0 1.29
56.167
0.00 0.03
0.024
0 I I
I I 1.27
56.250
0.00 0.03
0.024
0 1.26
56.333
0.00 0.03
0.023
0 1.25
56.417
0.00 0.03
0.023
0 1.24
56.500
0.00 0.03
0.023
0 1.23
56.583
0.00 0.03
0.023
0 1.22
56.667
0.00 0.03
0.022
0 1.21
56.750
0.00 0.03
0.022
0 1.19
56.833
0.00 0.03
0.022
0 1.18
56.917
0.00 0.03
0.022
0 1.17
57.000
0.00 0.03
0.022
0 1.16
57.083
0.00 0.03
0.021
0 1.15
57.167
0.00 0.03
0.021
0 1.14
57.250
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57.333
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57.417
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57.500
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57.583
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57.667
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57.750
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57.833
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57.917
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58.000
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58.083
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58.167
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58.250
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58.333
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60.333
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0.015
0 I I
I I 0.80
60.417
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60.500
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60.583
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0 I I
I I 0.50
64.583
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0 I I
I I 0.31
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72.833
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0.004
0 I I
I I 0.20
72.917
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73.000
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73.083
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73.333
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73.417
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