10+00 11+0012+00
13+00 14+00
15+00 16+00 17+00 18+00
19+0020+00 21+00 22+00 23+00
24+00
25+00 26+00
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37+00 38+00 39+00 TOWN OF ATHERTON 91 ASHFIELD ROAD ATHERTON, CA 94027 PROJECT DIRECTORY 1 DWG REF. SHT # TITLE T-1 1 TITLE SHEET/VICINITY MAP C-01 2 PLAN VIEW STA. 10+00 - STA 14+50 C-02 3 PLAN VIEW STA. 14+50 - STA 19+00 C-03 4 PLAN VIEW STA. 19+00 - STA 23+50 C-04 5 PLAN VIEW STA. 23+50 - STA 28+00 C-05 6 PLAN VIEW STA. 28+00 - STA 32+50 C-06 7 PLAN VIEW STA. 32+50 - STA 36+50 C-07 8 PLAN VIEW STA. 36+50 - STA 41+00 DTL-1 9 CROSS SECTION AND DETAILS SHEET THE WORK TO BE PERFORMED INCLUDES: · CONTRACTOR MOBILIZATION AND DEMOBILIZATION · BEST MANAGEMENT PRACTICES · EXCAVATION · CONSTRUCTION OF 3 FOOT HIGH CONCRETE FLOODWALL · BACK FILLING A BENCH AT 5% SLOPE · GRADE BACK SLOPE FROM BENCH AT 2:1 SLOPE TILL DAYBREAK TOWN OF ATHERON ATHERTON CREEK, ATHERTON, CA 94027 VICINITY MAP 4 SITE MAP SCALE: N.T.S. TETRA TECH, INC. ENGINEERS, PLANNERS, & ARCHITECTS 17885 VON KARMAN AVE STE. 500 IRVINE, CA 92614 (949) 809-5000 www.tetratech.com UPPER ATHERTON CREEK STABILIZATION AND FLOOD MITIGATION SHEET INDEX TOWN OF ATHERTON CITY LIMITS 72 PROJECT DESCRIPTION 3 GRADING QUANTITIES 5 BEGIN STA. 10+70 CONSTRUCTION NOTES EXCAVATION PER SHEET 9 CONSTRUCT 3 FOOT HIGH FLOODWALL PER SHEET 9 CREATE BENCH PER CROSS SECTIONS ON SHEET 9 BACKFILL AND GRADE AT 2:1, H:V SLOPE 1234 1 2 3 4 BEGIN STA. 20+29 1 2 3 4 END STA. 15+75 1 2 3 4 END STA. 36+93 1 2 3 4 STATIONS 10+70 TO 15+75: · CUT - 608.50 CUBIC YARDS · FILL - 2,512.59 CUBIC YARDS · NET FILL - 1,904.09 CUBIC YARDS STATIONS 20+29 TO 36+90: · CUT - 9,582.25 CUBIC YARDS · FILL - 1,326.99 CUBIC YARDS · NET CUT - 8,255.26 CUBIC YARDS FOR ENTIRE PROJECT LIMITS: · CUT - 10,190.75 CUBIC YARDS · FILL - 3,839.58 CUBIC YARDS · NET CUT - 6,351.17 CUBIC YARDS UPSTREAM PROJECT LIMIT STA 36+93 DOWNSTREAM PROJECT LIMIT STA 10+70 ALAMEDA DE LAS PULGAS CHANNEL EASEMENT LIMIT CHANNEL EASEMENT LIMIT EDGE OF BENCH WALSH RD APN: 073-220-270 TUNG JAMES T, TSE ELAINE K 306 WALSH RD, ATHERTON APN: 073-220-260 APO: LAGOMARSINO ALBERT J & HELEN M 24 BROADACRES RD, ATHERTON CA 10+00 11+00 12+00 13+00 14+00 15+00 EDGE OF BENCH EX. 12' WIDE PEDESTRIAN BRIDGE 3-FT RETAINING WALL 3-FT RETAINING WALL EX. CONC INVERT EX. TOB EX. TOB EX. DEAD TREE EX. VEGETATIVE SLOPE EX. VEGETATIVE SLOPE EXPOSED SANDSTONE (30' LONG) EX. 20' SACRETE WALLEX. HEADWALL APPROXIMATE DAYLIGHT APPROXIMATE DAYLIGHT LIMIT OF BENCH (EAST AND WEST) STA. 10+70.00
BEGIN 3-FT WALL TOP OF 3-FT RETAINING WALL
3' (TYP) NOTE: 1. TOP OF EXISTING CONCRETE INVERT PAVING WAS BURIED IN SOME AREAS AT THE TIME OF SURVEY AND MUST BE FIELD VERIFIED BY THE CONTRACTOR PRIOR TO CONSTRUCTION.
CONC. RETAINING
WALL APPROXIMATE DAYLIGHT (WEST) APPROXIMATE DAYLIGHT (EAST) STA 12+80.31 CONNECT BACK TO EXISTING INVERT STA 12+80.31 CONNECT BACK TO EXISTING INVERT STA. 10+08.00
BEGIN WALL
HEIGHTEN
STA. 11+00.00
BEGIN WALL
HEIGHT 6.5 FT
STA. 11+40.00
BEGIN WALL
TRANSITION
STA. 11+60.00
RESUME 3-FT WALL
EDGE OF BENCH N36°45'16"E 57.98'
ARSINO ALBERT J & HELEN M
ADACRES RD, ATHERTON CA
WOODSIDE JO
APN: 073-220-310 BAUMGARTNER WALTER F & MELODY 57 BROAD ACRES RD, ATHERTON APN: 073-220-310 BAUMGARTNER WALTER F & MELODY 57 BROAD ACRES RD, ATHERTON 15+00 16+00
17+00 18+00 19+00 20+00 PARCEL BOUNDARY (TYP)
BROADACRES RD CHANNEL C.L. EX. RCB EX. SHOTCRETE EX. 40' LF EX. DAMAGED SHOTCRETE WALL TO BE REPAIRED EX. SHOTCRETE / SACRETE EX. SHOTCRETE / SACRETE EX. UTILITY CROSSING EDGE OF BENCH CHANNEL EASEMENT LIMIT (TYP) EX. LOOSE STACKED CONC EX. SACRETE 3-FT RETAINING WALL 3-FT RETAINING WALL EX. CONC INVERT EX. EX. APPROXIMATE DAYLIGHT APPROXIMATE DAYLIGHT EX. 8' WIDE PEDESTRIAN BRIDGE NOTE: 1. TOP OF EXISTING CONCRETE INVERT PAVING WAS BURIED IN SOME AREAS AT THE TIME OF SURVEY AND MUST BE FIELD VERIFIED BY THE CONTRACTOR PRIOR TO CONSTRUCTION.
STA. 16+15.1+
BROADACRES ROAD
EX. 6.7' (W) x 5' (H) RCB LIMIT OF BENCH (EAST AND WEST) TOP OF 3-FT RETAINING WALL 3' (TYP)
CONC. RETAINING
WALL EX. DAMAGED SHOTCRETE WALL TO BE RE REPAIRED (APPROX. 40' ON EAST BANK) APPROXIMATE DAYLIGHT (WEST) APPROXIMATE DAYLIGHT (EAST) STA. 15+75.41
END 3-FT WALL
TOP OF 3-FT WALL (EAST & WEST) TOP OF BENCH (EAST AND WEST) 3' (TYP) NOTE: 1. TOP OF EXISTING CONCRETE INVERT PAVING WAS BURIED IN SOME AREAS AT THE TIME OF SURVEY AND MUST BE FIELD VERIFIED BY THE CONTRACTOR PRIOR TO CONSTRUCTION. APPROXIMATE DAYLIGHT (WEST) APPROXIMATE DAYLIGHT (EAST) STA. 20+29.31 BEGIN 5.5-FT
WALL TRANSITION APPROXIMATE TOP OF EXISTING REVETMENT
STA. 20+60.00
BEGIN 3-FT WALL
TNER WALTER F & MELODY
AD ACRES RD, ATHERTON APO: ELKUS RICHARD J JR TR ELKUS TRUST 328 WALSH RD, ATHERTON APN: 073-220-060 SHIBUMI LLC 93 BROADACRES RD, ATHERTON APN: 073-220-400 SCHMAIER ROBERT DAVID & SANDRA LYNN 336 WALSH RD, ATHERTON APN: 073-220-310 BAUMGARTNER WALTER F & MELODY 57 BROAD ACRES RD, ATHERTON
18+00
19+00 20+00
21+00
22+00
23+00
SHOTCRETE
SACRETE
25' SACRETE EDGE OF BENCH EDGE OF BENCH CHANNEL EASEMENT LIMIT (TYP) 3-FT RETAINING WALLAPPROXIMATE DAYLIGHT APPROXIMATE DAYLIGHT EX. SHOTCRETE / SACRETE ENDS AT STA 20+29 TOP OF 3-FT WALL (EAST & WEST)
3' (TYP) NOTE: 1. TOP OF EXISTING CONCRETE INVERT PAVING WAS BURIED IN SOME AREAS AT THE TIME OF SURVEY AND MUST BE FIELD VERIFIED BY THE CONTRACTOR PRIOR TO CONSTRUCTION. TOP OF BENCH (EAST AND WEST) APPROXIMATE DAYLIGHT (WEST) APPROXIMATE DAYLIGHT (EAST) 23+00
24+00
25+00 26+00 27+00 28+00 SACRETE SACRETE SACRETE EX. CONC INVERT 3 FOOT WALL APPROX. END OF BENCH APPROX. DAYLIGHT APPROX. DAYLIGHT TOP OF 3-FT WALL (EAST & WEST)
3' (TYP) NOTE: 1. TOP OF EXISTING CONCRETE INVERT PAVING WAS BURIED IN SOME AREAS AT THE TIME OF SURVEY AND MUST BE FIELD VERIFIED BY THE CONTRACTOR PRIOR TO CONSTRUCTION. TOP OF BENCH (EAST AND WEST) APPROXIMATE DAYLIGHT (WEST) APPROXIMATE DAYLIGHT (EAST) STA 32+06.51 CONNECT BACK TO EXISTING INVERT STA 31+50.00 CONNECT BACK TO EXISTING INVERT 28+00 29+00 30+00 31+00 32+00 3 FT WALL 3 FT WALL
END OF BENCH
END OF BENCH
APPROXIMATE DAYLIGHT APPROXIMATE DAYLIGHT CHANNEL EASEMENT TOP OF 3-FT WALL (EAST & WEST)
3' (TYP) NOTE: 1. TOP OF EXISTING CONCRETE INVERT PAVING WAS BURIED IN SOME AREAS AT THE TIME OF SURVEY AND MUST BE FIELD VERIFIED BY THE CONTRACTOR PRIOR TO CONSTRUCTION. TOP OF BENCH (EAST AND WEST) APPROXIMATE DAYLIGHT (WEST) APPROXIMATE DAYLIGHT (EAST) STA 34+72.97 CONNECT BACK TO EXISTING INVERT STA 33+90.68 CONNECT BACK TO EXISTING INVERT WALSH RD 33+00
34+00
35+00
36+00
37+00
EX. CONC INVERT END OF BENCH END OF BENCH 3 FOOT WALL 3 FOOT WALL TOP OF 3-FT WALL (EAST & WEST)
3' (TYP) TOP OF BENCH (EAST AND WEST)
STA. 36+93.30
END 3-FT WALL
(EAST & WEST) APPROXIMATE DAYLIGHT (WEST) APPROXIMATE DAYLIGHT (EAST) 36+00
37+00
38+00
39+00
40+00
END OF
BENCH
3 FOOT WALL END OF BENCH 3 FOOT WALL END PROJECT IMPROVEMENTS WALSH RD
6.5' BENCH RETAINING STRUCTURE (NOTE 1) APPROXIMATE DAYLIGHT APPROXIMATE DAYLIGHT EDGE OF BENCH EDGE OF BENCH 1 2 1 2 CONCRETE WALL SEE DETAIL A (RETAINING WALL
OPTION), DETAIL B (CRIB WALLOPTION), OR C (GABION WALLOPTION) HEREON INSTALL DOWEL @ 12" O.C. WITH MIN.6" EMBEDMENT. DRILL AND EPOXY INTO EX. CONCRETE. 3 FT 4.5' CHANNEL CL BACKFILL 5% 5% (TYP.)
3' (TYP) RETAINING STRUCTURE (NOTE 1) APPROXIMATE DAYLIGHT APPROXIMATE DAYLIGHT EDGE OF BENCH EDGE OF BENCH 1 2 1 2 CONCRETE WALL INSTALL DOWEL @ 12" O.C. WITH MIN.6" EMBEDMENT. DRILL AND EPOXY INTO EX. CONCRETE. 4.5' CHANNEL CL 5% 5% 3 FT (TYP.)
SEE DETAIL A (RETAINING WALL
OPTION), DETAIL B (CRIB WALLOPTION), OR C (GABION WALLOPTION) HEREON BACKFILL 3' (TYP) RETAINING STRUCTURE (NOTE 1) APPROXIMATE DAYLIGHT APPROXIMATE DAYLIGHT EDGE OF BENCH EDGE OF BENCH 1 2 1 2 CONCRETE WALL INSTALL DOWEL @ 12" O.C. WITH MIN.6" EMBEDMENT. DRILL AND EPOXY INTO EX. CONCRETE. 4.5' CHANNEL CL 5% 5% 3 FT (TYP.)
SEE DETAIL A (RETAINING WALLOPTION), DETAIL B (CRIB WALLOPTION), OR C (GABION WALLOPTION) HEREON BACKFILL 3' (TYP) RETAINING STRUCTURE (NOTE 1) APPROXIMATE DAYLIGHT APPROXIMATE DAYLIGHT EDGE OF BENCH EDGE OF BENCH 1 2 1 2 CONCRETE WALL INSTALL DOWEL @ 12" O.C. WITH MIN.6" EMBEDMENT. DRILL AND EPOXY INTO EX. CONCRETE. 4.5' CHANNEL CL 5% 5% 3 FT (TYP.)
SEE DETAIL A (RETAINING WALLOPTION), DETAIL B (CRIB WALLOPTION), OR C (GABION WALLOPTION) HEREON BACKFILL 3' (TYP) RETAINING STRUCTURE (NOTE 1) APPROXIMATE DAYLIGHT APPROXIMATE DAYLIGHTEDGE OF BENCH EDGE OF BENCH 1 2 1 2 CONCRETE WALL INSTALL DOWEL @ 12" O.C. WITH MIN.6" EMBEDMENT. DRILL AND EPOXY INTO EX. CONCRETE. 4.5' CHANNEL CL 5% 5% 3 FT (TYP.)
SEE DETAIL A (RETAINING WALLOPTION), DETAIL B (CRIB WALLOPTION), OR C (GABION WALLOPTION) HEREON BACKFILL 3' (TYP) RETAINING STRUCTURE (NOTE 1) APPROXIMATE DAYLIGHT APPROXIMATE DAYLIGHT EDGE OF BENCH EDGE OF BENCH 1 2 1 2 CONCRETE WALL INSTALL DOWEL @ 12" O.C. WITH MIN.6" EMBEDMENT. DRILL AND EPOXY INTO EX. CONCRETE. 4.5' CHANNEL CL 5% 5% 3 FT (TYP.)
SEE DETAIL A (RETAINING WALLOPTION), DETAIL B (CRIB WALLOPTION), OR C (GABION WALLOPTION) HEREON BACKFILL COMPACTED FILL FILL VOID W/ GRANULAR MATERIAL 52"+ SPACER (TYP) HEADER (TYP) 3' (TYP) GEOTEXTILE AGAINST GRANULAR MATERIAL 4 1 NOTE: 1. CRIB WALLS ARE CONSTRUCTED OF INDIVIDUAL BOXES MADE FROM PRECAST CONCRETE. FG 5% NOTE: 1. THE RETAINING STRUCTURE IS SHOWN HERE AS CAST-IN-PLACE, BUT MAY BE CONSTRUCTED OF OTHER MATERIALS SUCH AS GABION RETAINING STRUCTURES, KEYSTONE STACKABLE BLOCKS, OR OTHER RETAINING STRUCTURES. COMPACTED FILL 3' 3' HIGH INDIVIDUAL GABION WALL (TYP) 12" EMBEDMENT OF GABION BASKET 3' (TYP) GEOTEXTILE AGAINST GRANULAR MATERIAL FG 5% 6 1 FILL VOID WITH GRANULAR MATERIAL 12" THICK CAB 1.5' GABION BASKET INSTALL DOWEL @ 12" O.C. WITH MIN 6" EMBEDMENT. DRILL AND EPOXY INTO EX. CONCRETE 3' (TYP.)
4.5' (TYP.)
1' (TYP.)
1' (TYP.)
1.33' (TYP.)
1.33' (TYP.) REINFORCED CONCRETE RETAINING WALL FG 5% COMPACTED FILL VARIES TO 6.5'