CountyofSanMateo-LeridaCtGabardaWy-Final-Plans_KL_signed.pdf
PDF 11 MB Posted
- Solicitation number
- E5022
- Issued by
- San Mateo County, California
About this file
These are final construction plans and specifications for the County of San Mateo's Lerida Court and Gabarda Way Retaining Walls Improvement Project, a civil infrastructure project located in Ladera, California. The project involves approximately 320 feet of retaining wall improvements along County Road No. 222, consisting of demolition of existing deteriorating soldier pile and wood lagging walls and construction of new shotcrete-faced retaining walls supported by cast-in-drilled-hole concrete piles, steel walers, and dual rows of ground anchors. The scope includes two distinct wall systems (lower and upper walls), drainage system improvements with concrete swales, gutters, and new storm drain infrastructure, removal and replacement of asphalt concrete pavement and base materials, rock slope protection, site restoration with hydroseed and fiber rolls, tree removal, and coordination with existing water, electrical, sanitary sewer, and storm drain utilities. Sealed bids are due by 2:30 p.m. on Thursday, March 19, 2026, submitted to the County Executive's Office, 500 County Center, 5th Floor, Redwood City, California 94063. The anticipated contract award date is April 7, 2026, with contractors required to begin work within ten calendar days of receiving the Notice to Proceed and complete the project within 80 working days.
The Engineer's estimate for the project is $3,060,000. Contractors must possess either a Class A License or applicable Class C licenses and be registered with the California Department of Industrial Relations at contract award. All bidders must comply with prevailing wage requirements under California Labor Code Section 1770 et seq., maintain certified payroll records, and obtain comprehensive general liability insurance of $1,000,000, motor vehicle liability insurance of $1,000,000, and professional liability insurance of $1,000,000, with the County named as additional insured. The project is subject to liquidated damages of $4,800 per calendar day for delays, construction waste management requirements mandating 100 percent diversion of inert materials and 50 percent diversion of remaining construction debris, and water pollution control measures. Bidders may not withdraw their bids for forty-five days after bid opening. Plans and specifications are available for download via the OpenGov website or for purchase at a nonrefundable fee of $40 per set from the Director of Public Works. The deadline for written questions and contract exceptions is March 13, 2026 at 5:00 p.m.
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PROJECT
LOCATION
HALEY & ALDRICH, INC.
785 Ygnacio Valley Road Walnut Creek, CA 94595 Tel: 925.935.9771 www.haleyaldrich.com
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UN
TY OF SAN MATEO
P U
B L I C W O R
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E5022
COUNTY OF SAN MATEOCALIFORNIA
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CT
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GABARDA
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WY
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PECORA
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WY
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LA MESA DR
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LINARIA WY
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CONIL WY
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LA MESA DR
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ERICA WY
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LA MESA
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LERIDA
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ALPINE RD
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GABARDA
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PROJECT LOCATION
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CABRILLO
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SAN MATEO BRIDGE
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SAN FRANCISCO
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MILLBRAE
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DALY CITY
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PACIFICA
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EAST PALO ALTO
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MATEO
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AutoCAD SHX Text LERIDA COURT AND GABARDA WAY RETAINING WALLS IMPROVEMENT PROJECT LADERA, CALIFORNIA COUNTY ROAD NO. 222 TOTAL PROJECT APPROXIMATELY 320 FEET COUNTY PROJECT NO. RW928; PROJECT FILE NO. E5022
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1. TITLE SHEET TITLE SHEET 2. BEST MANAGEMENT PRACTICES BEST MANAGEMENT PRACTICES 3. CONSTRUCTION STAGING AND REPAIR PLAN CONSTRUCTION STAGING AND REPAIR PLAN 4. TYPICAL SECTION TYPICAL SECTION 5. LOWER WALL PLAN AND ELEVATION LOWER WALL PLAN AND ELEVATION 6. UPPER WALL PLAN AND ELEVATION UPPER WALL PLAN AND ELEVATION 7. RETAINING WALL DETAILS (1 OF 2) RETAINING WALL DETAILS (1 OF 2) 8. RETAINING WALL DETAILS (2 OF 2) RETAINING WALL DETAILS (2 OF 2) 9. DRAINAGE DETAILS DRAINAGE DETAILS 10. DRAINAGE AND EROSION CONTROL PLAN DRAINAGE AND EROSION CONTROL PLAN 11. COUNTY OF SAN MATEO STANDARD DRAWINGS (1 OF 2) COUNTY OF SAN MATEO STANDARD DRAWINGS (1 OF 2) 12. COUNTY OF SAN MATEO STANDARD DRAWINGS (2 OF 2) COUNTY OF SAN MATEO STANDARD DRAWINGS (2 OF 2)
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SHEET INDEX
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VICINITY MAP
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NOT TO SCALE
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LOCATION MAP
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AutoCAD SHX Text AB (CL.2) AGGREGATE BASE (CLASS 2) AGGREGATE BASE (CLASS 2) AC ASPHALT CONCRETE ASPHALT CONCRETE ALIN ALIGNMENT ALIGNMENT APPROX APPROXIMATE APPROXIMATE BKF BACKFILL BACKFILL BVCE BEGINNING OF VERTICAL CURVE ELEVATION BEGINNING OF VERTICAL CURVE ELEVATION BVCS BEGINNING OF VERTICAL CURVE STATION BEGINNING OF VERTICAL CURVE STATION BOT BOTTOM BOTTOM BTW BETWEEN BETWEEN BW BOTTOM OF WALL BOTTOM OF WALL CIDH CAST-IN-DRILLED-HOLE CAST-IN-DRILLED-HOLE CIP CAST-IN-PLACE CAST-IN-PLACE CONC CONCRETE CONCRETE CONST CONSTRUCTION CONSTRUCTION CL CENTERLINE, CHAIN LINK, CLASS CENTERLINE, CHAIN LINK, CLASS CLR CLEAR CLEAR CMP CORRUGATED METAL PIPE CORRUGATED METAL PIPE CP CONTROL POINT CONTROL POINT DI DRAINAGE INLET, DROP INLET DRAINAGE INLET, DROP INLET DIA, DIAMETER DR DRIVE DRIVE EG EXISTING GRADING EXISTING GRADING ELEV ELEVATION ELEVATION EMB EMBANKMENT EMBANKMENT EP EDGE OF PAVEMENT EDGE OF PAVEMENT EVCE ENDING OF VERTICAL CURVE ELEVATION ENDING OF VERTICAL CURVE ELEVATION EVCS ENDING OF VERTICAL CURVE STATION ENDING OF VERTICAL CURVE STATION EX, EXIST EXISTING EXISTING EXC EXCAVATION EXCAVATION FG FINISH GROUND FINISH GROUND FL FLOW LINE FLOW LINE FTG FOOTING FOOTING GA GROUND ANCHOR GROUND ANCHOR GCP GROUND CONTROL POINT GROUND CONTROL POINT GRE GEOGRID-REINFORCED EMBANKMENT GEOGRID-REINFORCED EMBANKMENT HDPE HIGH-DENSITY POLYETHYLENE HIGH-DENSITY POLYETHYLENE HSS HOLLOW STRUCTURAL SECTION HOLLOW STRUCTURAL SECTION HMA HOT MIX ASPHALT HOT MIX ASPHALT K CURVE COEFFICIENT CURVE COEFFICIENT LOL LAYOUT LINE LAYOUT LINE LT, L LEFT, LENGTH LEFT, LENGTH MAX MAXIMUM MAXIMUM MC MISCELLANEOUS CHANNEL MISCELLANEOUS CHANNEL MIN MINIMUM MINIMUM MON MONUMENT MONUMENT MSE MECHANICALLY STABILIZED EARTH MECHANICALLY STABILIZED EARTH NO. NUMBER NUMBER O.C. ON CENTER ON CENTER OG ORIGINAL GROUND, ON GRADE ORIGINAL GROUND, ON GRADE PCC PORTLAND CONCRETE CEMENT PORTLAND CONCRETE CEMENT PERF PERFORATED PERFORATED PL PLATE PLATE P/L PROPERTY LINE PROPERTY LINE PR PROPOSED PROPOSED PVC POLYVINYL CHLORIDE PIPE POLYVINYL CHLORIDE PIPE PVI POINT OF VERTICAL INTERSECTION POINT OF VERTICAL INTERSECTION PVMT PAVEMENT PAVEMENT RCP REINFORCED CONCRETE PIPE REINFORCED CONCRETE PIPE REINF REINFORCEMENT REINFORCEMENT REL COMP RELATIVE COMPACTION RELATIVE COMPACTION RET RETAINING RETAINING RSP ROCK SLOPE PROTECTION ROCK SLOPE PROTECTION RT, R RIGHT RIGHT R&D REMOVE AND DISPOSE REMOVE AND DISPOSE RW RETAINING WALL RETAINING WALL R/W, ROW RIGHT OF WAY RIGHT OF WAY S SLOPE SLOPE SD STORM DRAIN STORM DRAIN SDMH STORM DRAIN MANHOLE STORM DRAIN MANHOLE SHT SHEET SHEET ST STREET STREET STA STATION STATION STD STANDARD STANDARD STANDARD STR STRUCTURE STRUCTURE TBD TO BE DETERMINED TO BE DETERMINED TOT TOTAL TOTAL TT TOP OF TRENCH (SUBDRAIN) TOP OF TRENCH (SUBDRAIN) TW TOP OF WALL TOP OF WALL TYP TYPICAL TYPICAL UON UNLESS OTHERWISE NOTED UNLESS OTHERWISE NOTED VAR VARIES VARIES WWM WELDED WIRE MESH WELDED WIRE MESH
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ABBREVIATIONS
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LEGEND
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RIGHT OF WAY/PROPERTY LINE
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NATIVE BACKFILL
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CLASS 2 AGGREGATE BASE - AB (CL. 2) (GRAVEL)
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PORTLAND CEMENT CONCRETE
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MISCELLANEOUS ASPHALT CONCRETE
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ROCK SWALE AND FRENCH DRAIN
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DETAIL NUMBER AND SHEET
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1. CONTRACTOR SHALL CONFINE THEIR OPERATIONS AND ACTIVITIES WITHIN CONTRACTOR SHALL CONFINE THEIR OPERATIONS AND ACTIVITIES WITHIN THE PROJECT LIMITS, CONSISTING OF ROAD RIGHT-OF-WAY, RIGHTS OF ENTRY AND/OR PROJECT CONFORMS, AS SHOWN ON THE PLANS AND AS DIRECTED BY THE ENGINEER. 2. CONTINUOUS DUST CONTROL SHALL BE PROVIDED AS REQUIRED BY THE CONTINUOUS DUST CONTROL SHALL BE PROVIDED AS REQUIRED BY THE COUNTY AND AS DIRECTED BY THE ENGINEER. 3. LOCATIONS AND DEPTHS OF EXISTING UTILITIES SHOWN ON THE PLANS LOCATIONS AND DEPTHS OF EXISTING UTILITIES SHOWN ON THE PLANS ARE APPROXIMATE ONLY. CONTRACTOR SHALL BE RESPONSIBLE FOR CONTACTING THE UTILITIES TO DETERMINE EXACT LOCATIONS AND DEPTHS. CONTRACTOR SHALL CALL USA NORTH 811 (USA) UNDERGROUND SERVICE ALERT A MINIMUM OF 72 HOURS IN ADVANCE OF ANY EXCAVATION OR TRENCHING WORK. USA MAY BE CONTACTED EITHER ONLINE AT USANORTH811.ORG OR BY PHONE BY DIALING (800) 642-2444 OR 811. WHEN CALLING, BE PREPARED TO GIVE LOCATION OR 811. WHEN CALLING, BE PREPARED TO GIVE LOCATION AND NATURE OF WORK, START DATE, COMPANY NAME, ADDRESS AND TELEPHONE NUMBER. 4. PLANS MAY NOT SHOW ALL EXISTING WATER, GAS, OR SANITARY PLANS MAY NOT SHOW ALL EXISTING WATER, GAS, OR SANITARY SEWER LATERALS. CONTRACTOR SHALL BE RESPONSIBLE FOR VERIFICATION AND PRESERVATION OF ALL SUCH FACILITIES WHICH ARE NOT TO BE RELOCATED. 5. CONTRACTOR IS ADVISED THAT EXCAVATION MAY CONFLICT WITH CONTRACTOR IS ADVISED THAT EXCAVATION MAY CONFLICT WITH SANITARY SEWER LATERALS, GAS LINES, WATER LINES, AND OTHER UNDERGROUND UTILITIES. ANY DAMAGE TO EXISTING FACILITIES CAUSED BY THE CONTRACTOR SHALL BE REPAIRED AT THE CONTRACTOR'S EXPENSE. 6. NO TREES, VEGETATION OR IMPROVEMENTS (INCLUDING FENCES) SHALL NO TREES, VEGETATION OR IMPROVEMENTS (INCLUDING FENCES) SHALL BE REMOVED WITHOUT THE PRIOR WRITTEN CONSENT AND APPROVAL OF THE ENGINEER. VEGETATION AND IMPROVEMENTS WHICH ARE DESIGNATED TO BE REMOVED SHALL BECOME THE PROPERTY OF THE CONTRACTOR, UNLESS OTHERWISE DIRECTED BY THE ENGINEER IN WRITING. 7. WHEN DIRECTED BY THE ENGINEER, CUT AND FILL SLOPE RATIOS SHALL WHEN DIRECTED BY THE ENGINEER, CUT AND FILL SLOPE RATIOS SHALL BE VARIED TO AVOID TREES OR OTHER EXISTING IMPROVEMENTS. 8. CONTRACTOR SHALL EXERCISE CARE WHEN EXCAVATING NEAR TREES CONTRACTOR SHALL EXERCISE CARE WHEN EXCAVATING NEAR TREES AND ROOTS OF TREES TO REMAIN. 9. ANY DAMAGE, AS A RESULT OF THE CONTRACTOR'S OPERATION, TO ANY DAMAGE, AS A RESULT OF THE CONTRACTOR'S OPERATION, TO PAVEMENT AND BASE MATERIAL THAT IS TO REMAIN SHALL BE REPAIRED, OR REMOVED AND REPLACED WITH SAME TYPE OF MATERIAL OR APPROVED EQUAL, AS DIRECTED BY THE ENGINEER, AND AT THE SOLE EXPENSE OF THE CONTRACTOR. THE ENGINEER SHALL BE THE SOLE JUDGE OF THE ADEQUACY OF THE COMPLETED REMEDIAL WORK. 10. EXISTING SITE IMPROVEMENTS, INCLUDING MONUMENTS AND UTILITIES, EXISTING SITE IMPROVEMENTS, INCLUDING MONUMENTS AND UTILITIES, TO REMAIN MAY INTERFERE WITH THE WORK. THESE FACILITIES SHALL BE PROTECTED OR REMOVED AND REPLACED WITH LIKE KIND AND QUALITY AT THE CONTRACTOR'S EXPENSE. 11. CONTRACTOR SHALL WORK WITH THE COUNTY BIOLOGIST FOR CONTRACTOR SHALL WORK WITH THE COUNTY BIOLOGIST FOR WOODRATS, NESTING BIRDS, ENVIRONMENTAL TRAINING, PLACEMENT OF EXCLUSION FENCING, ETC. AS NEEDED.
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TEMPORARY PROJECT CONTROL POINT
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TITLE SHEET
AutoCAD SHX Text TO BE SUPPLEMENTED BY STATE OF CALIFORNIA DEPARTMENT OF TRANSPORTATION STANDARD PLANS DATED 2018 AND ADOPTED BY SAN MATEO COUNTY, FEBRUARY 11, 2020, BY RESOLUTION NO. 0772272018 AND ADOPTED BY SAN MATEO COUNTY, FEBRUARY 11, 2020, BY RESOLUTION NO. 077227 AND ADOPTED BY SAN MATEO COUNTY, FEBRUARY 11, 2020, BY RESOLUTION NO. 077227FEBRUARY 11, 2020, BY RESOLUTION NO. 077227, BY RESOLUTION NO. 077227077227
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LIMITS OF PAVEMENT REMOVAL
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EXISTING TREE TO BE REMOVED
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GROUND ANCHOR
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PROPOSED IMPROVEMENTS
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TEMP CHAIN-LINK FENCE/GATE
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PROJECT NO.:
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APPROVED:
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DATE:
AutoCAD SHX Text KRZYSZTOF LISAJ, DEPUTY DIRECTOR OF ENGINEERING AND RESOURCE PROTECTION R. C. E. # 84003
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DATE
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REVISION
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ORIGINAL SCALE IS IN INCHES
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FOR REDUCED PLANS
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FILE NO.
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AutoCAD SHX Text 555 COUNTY CENTER, 5th FLOOR
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REDWOOD CITY, CALIFORNIA 94063
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DESIGNED BY:
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CHECKED BY:
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SHEET OF
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ANN MADER STILLMAN DIRECTOR OF PUBLIC WORKS COUNTY SAN MATEO
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IMPROVEMENT PROJECT, LADERA, CALIFORNIA
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LERIDA COURT AND GABARDA WAY RETAINING WALLS
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STANDARD PLANS
AutoCAD SHX Text CALTRANS STANDARD PLANS A85 CHAIN LINK FENCE CHAIN LINK FENCE B11-47 POST POCKET POST POCKET T51 TEMPORARY SILT FENCE TEMPORARY SILT FENCE T58 TEMPORARY CONSTRUCTION ENTRANCE TEMPORARY CONSTRUCTION ENTRANCE SAN MATEO COUNTY STANDARD DRAWINGS B-1 TYPE GO INLET TYPE GO INLET B-1A TYPE GO INLET APRON DETAILS TYPE GO INLET APRON DETAILS B-6 DROP INLET DROP INLET B-7 DROP INLET DETAILDROP INLET DETAIL
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EXISTING ELECTRICAL LINE
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FIBER ROLL
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HALEY & ALDRICH GEOTECHNICAL BORING LOCATION
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APPROX CLEARING & GRUBBING/ HYDROSEED LIMITS
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HALEY & ALDRICH, INC.
785 Ygnacio Valley Road Walnut Creek, CA 94595 Tel: 925.935.9771 www.haleyaldrich.com
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TY OF SAN MATEO
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PROJECT NO.:
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APPROVED:
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AutoCAD SHX Text KRZYSZTOF LISAJ, DEPUTY DIRECTOR OF ENGINEERING AND RESOURCE PROTECTION R. C. E. # 84003
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DATE
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FILE NO.
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AutoCAD SHX Text 555 COUNTY CENTER, 5th FLOOR
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REDWOOD CITY, CALIFORNIA 94063
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DESIGNED BY:
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DRAWN BY:
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SHEET OF
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ANN MADER STILLMAN DIRECTOR OF PUBLIC WORKS COUNTY SAN MATEO
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IMPROVEMENT PROJECT, LADERA, CALIFORNIA
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LERIDA COURT AND GABARDA WAY RETAINING WALLS
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BEST MANAGEMENT PRACTICES
AutoCAD SHX Text mraman Typewritten Text 2/20/2026
Walnut Creek, CA 94595 Tel: 925.935.9771 www.haleyaldrich.com
CO
UN
TY OF SAN MATEO
P U
B L I C W O R
K S
E5022
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15 LERIDA CT APN: 077353240
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1 LERIDA CT APN: 077353110
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25 LERIDA CT APN: 077353460
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101 PECORA WY APN: 077353250
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930 LA MESA DR APN: 077353120
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29 LERIDA CT APN: 077353450
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918 LA MESA DR APN: 077363220
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GABARDA WY
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LERIDA CT
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PECORA WY
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LA MESA DR
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WB
AutoCAD SHX Text B-5
AutoCAD SHX Text B-4
AutoCAD SHX Text B-3
AutoCAD SHX Text B-1
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SITE ACCESS
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APPROX STAGING AREA FOR LOWER WALL
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POTENTIAL UPPER WALL STAGING AREA PRUNE TREES AS REQUIRED, SEE NOTE 5
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EXIST SOLDIER PILE AND WOOD LAGGING RW WITH GROUND ANCHORS, STA 1+20 TO 2+52
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EXIST CONC DITCH (TYP), REMOVE AND REPLACE WITH CONC SWALE, SEE DET 4 ON SHT 9
AutoCAD SHX Text SHOTCRETE RETAINING WALL ON CIDH CONC PILES WITH WALER AND TWO ROWS OF GROUND ANCHORS
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EXIST SOLDIER PILE AND WOOD LAGGING RW WITH GROUND ANCHORS, STA 1+20 TO 2+94
AutoCAD SHX Text SHOTCRETE RETAINING WALL ON CIDH CONC PILES WITH WALER AND TWO ROWS OF GROUND ANCHORS
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UPPER WALL LOL (EXIST WALL FACE)
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LOWER GROUND ANCHORS (TYP)
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UPPER GROUND ANCHORS (TYP)
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EXIST CL FENCE
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DOWNSLOPE EDGE OF EARTH FILL EMBANKMENT, 6' WIDE
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LOWER WALL LOL (EXIST WALL FACE)
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EXIST WALL GROUND ANCHORS (TYP)
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EXIST STRUCTURE, DO NOT DISTURB
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CONC GUTTER (TYP), SEE DETAIL 3 ON SHT 9
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CONC SWALE (TYP), SEE DETAIL 4 ON SHT 9
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TEMP SILT FENCE, CALTRANS STD PLAN T51, APPROX LIMITS OF DISTURBANCE
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EXIST WALL DRAINAGE, GROUT AND ABANDON IN PLACE
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DI, SEE DET 2A ON SHT 9, SEE DET B-1 ON SHT 11
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DRAINAGE SYSTEM, SEE DETAILS ON SHT 9
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DROP INLET, COUNTY STD PLANS B-6 AND B-7
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DROP INLET, COUNTY STD PLANS B-6 AND B-7
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DROP INLET, COUNTY STD PLANS B-6 AND B-7, SEE SHT 12 AND 13
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SEE NOTE 3
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TEMPORARY CONSTRUCTION ENTRANCE, CALTRANS STD PLAN T58
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12' WIDE
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EXIST RW AND DOWNDRAIN, PROTECT
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EXIST CONC DITCH (TYP), REMOVE AND REPLACE WITH CONC GUTTER, SEE DET 3 ON SHT 9
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RSP
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REMOVE OAK TREE
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REMOVE OAK TREE
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PROJECT NO.:
AutoCAD SHX Text 0207542
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APPROVED:
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DATE:
AutoCAD SHX Text KRZYSZTOF LISAJ, DEPUTY DIRECTOR OF ENGINEERING AND RESOURCE PROTECTION R. C. E. # 84003
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DATE
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REVISION
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ORIGINAL SCALE IS IN INCHES
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FOR REDUCED PLANS
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FILE NO.
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SCALE:
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DATE:
AutoCAD SHX Text 555 COUNTY CENTER, 5th FLOOR
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REDWOOD CITY, CALIFORNIA 94063
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DESIGNED BY:
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CHECKED BY:
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DRAWN BY:
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SHEET OF
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ANN MADER STILLMAN DIRECTOR OF PUBLIC WORKS COUNTY SAN MATEO
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IMPROVEMENT PROJECT, LADERA, CALIFORNIA
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LERIDA COURT AND GABARDA WAY RETAINING WALLS
AutoCAD SHX Text 02-11-2026
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AS SHOWN
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AutoCAD SHX Text No. C91208C91208
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CONSTRUCTION STAGING AND REPAIR PLAN
AutoCAD SHX Text NOTES 1. THE LOCATION AND DIRECTION OF EXISTING GROUND ANCHORS ARE APPROXIMATE. THE LOCATION AND DIRECTION OF EXISTING GROUND ANCHORS ARE APPROXIMATE. 2. POTHOLING WAS PERFORMED AT THE LOWER WALL SITE BETWEEN THE FACE OF EXISTING WALL POTHOLING WAS PERFORMED AT THE LOWER WALL SITE BETWEEN THE FACE OF EXISTING WALL AND AC DIKE. SLOTTED STORM DRAIN PIPES WERE FOUND FROM THIS WORK TO THE MAXIMUM EXPLORATION DEPTH OF 5 FEET. THOSE PIPES ARE ANTICIPATED TO BE REMOVED AND REPLACED DURING CONSTRUCTION. 3. CONTRACTOR SHALL DESIGN GROUND ANCHORS TO AVOID 918 LA MESA DRIVE. CONTRACTOR SHALL DESIGN GROUND ANCHORS TO AVOID 918 LA MESA DRIVE. 4. CONTRACTOR SHALL SUBMIT A TRAFFIC CONTROL PLAN THAT ALLOWS TRAFFIC FLOW DURING CONTRACTOR SHALL SUBMIT A TRAFFIC CONTROL PLAN THAT ALLOWS TRAFFIC FLOW DURING NON-CONSTRUCTION HOURS. 5. TREES THAT NEED TO BE PRUNED SHALL BE MARKED BY THE CONTRACTOR AND APPROVED BY TREES THAT NEED TO BE PRUNED SHALL BE MARKED BY THE CONTRACTOR AND APPROVED BY THE ENGINEER.
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SCALE
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FEET
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AutoCAD SHX Text BASEMAP REFERENCE 1. GROUND CONTROL SURVEY BY RUGGERI-JENSEN-AZAR (RJA), DATED 15 MAY 2025. GROUND CONTROL SURVEY BY RUGGERI-JENSEN-AZAR (RJA), DATED 15 MAY 2025. 2. TOPOGRAPHIC BASEMAP BASED ON UAS LIDAR FLIGHT CONDUCTED ON 10/31/2022 BY CAL TOPOGRAPHIC BASEMAP BASED ON UAS LIDAR FLIGHT CONDUCTED ON 10/31/2022 BY CAL ENGINEERING & GEOLOGY. 3. PROJECT ALIGNMENTS TAKEN ALONG FACE OF EXISTING RETAINING WALLS. BEGINNING OF EACH PROJECT ALIGNMENTS TAKEN ALONG FACE OF EXISTING RETAINING WALLS. BEGINNING OF EACH EXISTING WALL (CENTER OF FIRST SOLDIER PILE) IS AT STATION 1+20.
mraman Typewritten Text mraman Typewritten Text mraman Typewritten Text 2/20/2026
Walnut Creek, CA 94595 Tel: 925.935.9771 www.haleyaldrich.com
CO
UN
TY OF SAN MATEO
P U
B L I C W O R
K S
E5022
AutoCAD SHX Text Artificial Fill/Colluvium
AutoCAD SHX Text Bedrock
AutoCAD SHX Text Landslide Debris
AutoCAD SHX Text Colluvium
AutoCAD SHX Text Artificial Fill/
AutoCAD SHX Text Landslide Debris
AutoCAD SHX Text Bedrock
AutoCAD SHX Text SHOTCRETE FACED RETAINING WALL ON CIDH CONC PILES WITH WALERS AND TWO ROWS OF GROUND ANCHORS, SEE DETAILS ON SHEET 7
AutoCAD SHX Text SHOTCRETE FACED RETAINING WALL ON CIDH CONC PILES WITH WALERS AND TWO ROWS OF GROUND ANCHORS, SEE DETAIL 1 ON SHT 7
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EXIST SOLDIER PILE AND WOOD LAGGING RETAINING WALL (GROUND ANCHORS NOT SHOWN)
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EXIST SOLDIER PILE AND WOOD LAGGING RETAINING WALL (GROUND ANCHORS NOT SHOWN)
AutoCAD SHX Text R/W
AutoCAD SHX Text R/W
AutoCAD SHX Text P/L
AutoCAD SHX Text R/W
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INFERRED GEOLOGICAL CONTACTS, APPROXIMATE
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CONCRETE SWALE (TYP), REMOVE AND REPLACE, SEE DETAIL 4 ON SHT 9
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CONCRETE GUTTER (TYP), SEE DETAIL 3 ON SHT 9
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EARTH FILL EMBANKMENT (WHERE OCCURS), SEE DETAIL 6 ON SHT 9
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OG
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FG
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COMPACT UPPER 12" OF SUBGRADE
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TEMP CL FENC CAL STD PLAN, PROPOSED UPPER WALL STAGING AREA
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PROJECT NO.:
AutoCAD SHX Text 0207542
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APPROVED:
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DATE:
AutoCAD SHX Text KRZYSZTOF LISAJ, DEPUTY DIRECTOR OF ENGINEERING AND RESOURCE PROTECTION R. C. E. # 84003
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DATE
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REVISION
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ORIGINAL SCALE IS IN INCHES
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FOR REDUCED PLANS
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FILE NO.
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SCALE:
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DATE:
AutoCAD SHX Text 555 COUNTY CENTER, 5th FLOOR
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REDWOOD CITY, CALIFORNIA 94063
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DESIGNED BY:
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CHECKED BY:
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DRAWN BY:
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SHEET OF
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ANN MADER STILLMAN DIRECTOR OF PUBLIC WORKS COUNTY SAN MATEO
AutoCAD SHX Text
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IMPROVEMENT PROJECT, LADERA, CALIFORNIA
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LERIDA COURT AND GABARDA WAY RETAINING WALLS
AutoCAD SHX Text 02-11-2026
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AS SHOWN
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TYPICAL SECTION
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SCALE
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FEET
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AutoCAD SHX Text mraman Typewritten Text mraman Typewritten Text 2/20/2026
ROCK SLOPE PROTECTION (RSP) DETAIL A
HALEY & ALDRICH, INC.
785 Ygnacio Valley Road Walnut Creek, CA 94595 Tel: 925.935.9771 www.haleyaldrich.com
CO
UN
TY OF SAN MATEO
P U
B L I C W O R
K S
E5022
AutoCAD SHX Text L1
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CONC WALER
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SHOTCRETE FACING, ADD FORM BOARDS BEHIND AS REQD
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NEW PILE NO. (TYP)
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GROUND ANCHOR, UPPER LEVEL (TYP)
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GROUND ANCHOR, LOWER LEVEL (TYP)
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EXIST SOLDIER PILE, W27X94 (TYP), UNLESS OTHERWISE NOTED
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EXIST SOLDIER PILE, W12X22
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EXIST SOLDIER PILE, W12X22
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EXIST WOOD LAGGING (TYP)
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EXIST GROUND ANCHORS (TYP)
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OG (FRONT)
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EXIST CONC PILE (TYP)
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OG (BEHIND)
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CIDH CONC PILE (TYP)
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EXIST PIPE (TYP)
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DI, SEE DETAIL 2A ON SHT 9
AutoCAD SHX Text EXIST GROUND ANCHORS AND STEEL WALER, REMOVE AND DISPOSE OF WALER, ABANDON GROUND ANCHORS
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TW
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BW
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STEEL WALER, CONC COVER NOT SHOWN
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EXIST SD
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APPROX. EXIST SS LOCATION
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GROUND ANCHOR A11, SEE NOTE 4
AutoCAD SHX Text B-5
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25 LERIDA CT APN: 077353460
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15 LERIDA CT APN: 077353240
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1 LERIDA CT APN: 077353110
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EXIST 36'' CIDH PILE (TYP)
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EXIST W12X22
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EXIST SOLDIER PILE, W27X94 (TYP)
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EXIST W12X22
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EXIST SOLDIER PILE AND WOOD LAGGING RW WITH GROUND ANCHORS, STA 1+20 TO 2+52
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EXIST FENCE
AutoCAD SHX Text SHOTCRETE RETAINING WALL ON CIDH CONC PILES WITH WALER AND TWO ROWS OF GROUND ANCHORS
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LOWER WALL LOL (EXIST WALL FACE)
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EXIST ELECTRIC
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EXIST WATER
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UPPER GROUND ANCHORS (TYP)
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LOWER GROUND ANCHORS (TYP)
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REMOVE AND REPLACE AC DIKES STA 2+25 TO 2+45
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DRAINAGE SYSTEM, SEE DETAILS ON SHT 9
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EXIST EP AND AC DIKE
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REMOVE BASE AND SURFACING, REPLACE PVMT 4" HMA OVER 8" AB, SLOPE TO DRAIN TO DI
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EXIST CMP, REMOVE AND REPLACE WITH 12" HDPE
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EXIST WALL DRAINAGE, GROUT AND ABANDON IN PLACE
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RSP, FACING CL, 2' THICK, 6'X10' UNDERLAIN BY RSP FABRIC
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AC DIKE (TYP)
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RSP FABRIC, CLASS 8 (UNDERLAIN)
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FG, SLOPE VARIES, CONFORM TO EXIST AT ENDS
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OG
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PROJECT NO.:
AutoCAD SHX Text 0207542
AutoCAD SHX Text
APPROVED:
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DATE:
AutoCAD SHX Text KRZYSZTOF LISAJ, DEPUTY DIRECTOR OF ENGINEERING AND RESOURCE PROTECTION R. C. E. # 84003
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DATE
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REVISION
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ORIGINAL SCALE IS IN INCHES
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FOR REDUCED PLANS
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AutoCAD SHX Text
FILE NO.
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SCALE:
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DATE:
AutoCAD SHX Text 555 COUNTY CENTER, 5th FLOOR
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REDWOOD CITY, CALIFORNIA 94063
AutoCAD SHX Text
DESIGNED BY:
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CHECKED BY:
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DRAWN BY:
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SHEET OF
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ANN MADER STILLMAN DIRECTOR OF PUBLIC WORKS COUNTY SAN MATEO
AutoCAD SHX Text
AutoCAD SHX Text
IMPROVEMENT PROJECT, LADERA, CALIFORNIA
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LERIDA COURT AND GABARDA WAY RETAINING WALLS
AutoCAD SHX Text 02-11-2026
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AS SHOWN
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MA
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CH
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LOWER WALL PLAN AND ELEVATION
AutoCAD SHX Text NOTES: 1. THE LENGTH OF EXISTING PILES ARE APPROXIMATE. THE LENGTH OF EXISTING PILES ARE APPROXIMATE. 2. THE ALIGNMENT OF THE EXISTING WALL IS APPROXIMATE. THEREFORE, THE STATIONING FOR THE THE ALIGNMENT OF THE EXISTING WALL IS APPROXIMATE. THEREFORE, THE STATIONING FOR THE NEW PILES IS FOR REFERENCE ONLY. THE NEW CONCRETE PILES SHALL BE POSITIONED AT THE CENTERLINE BETWEEN THE ADJACENT EXISTING I-BEAM, EXCEPT FOR PILE L1. 3. DO NOT REMOVE EXISTING STEEL WALERS UNTIL THE NEW LOWER LEVEL GROUND ANCHORS ARE DO NOT REMOVE EXISTING STEEL WALERS UNTIL THE NEW LOWER LEVEL GROUND ANCHORS ARE INSTALLED, TESTED, AND LOCKED-OFF. 4. UTILITY LOCATIONS ARE APPROXIMATE. THE CONTRACTOR SHALL VERIFY UTILITY LOCATIONS AND UTILITY LOCATIONS ARE APPROXIMATE. THE CONTRACTOR SHALL VERIFY UTILITY LOCATIONS AND DEPTHS PRIOR TO CONSTRUCTION. THE LOCATION OF GROUND ANCHOR A11 MAY REQUIRE ADJUSTMENT IF UTILITY CONFLICTS ARE IDENTIFIED. THE CONTRACTOR SHALL NOTIFY THE ENGINEER IMMEDIATELY IF A UTILITY CONFLICT IS ENCOUNTERED OR SUSPECTED.
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LOWER WALL ELEVATION
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PLAN
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*SEE DETAIL 1 ON SHT 8 FOR PILE CUT-OFF ELEV DET
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AutoCAD SHX Text mraman Typewritten Text 2/20/2026
Walnut Creek, CA 94595 Tel: 925.935.9771 www.haleyaldrich.com
CO
UN
TY OF SAN MATEO
P U
B L I C W O R
K S
E5022
AutoCAD SHX Text U29
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NEW PILE NO. (TYP)
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GROUND ANCHOR WITH STEEL WALER, CONC COVER NOT SHOWN, UPPER LEVEL (TYP)
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GROUND ANCHOR, LOWER LEVEL (TYP)
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CONC WALER
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CONC GUTTER F/L (BEHIND)
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SHOTCRETE FACING, ADD FORM BOARDS BEHIND AS REQD
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EXIST SOLDIER PILE (TYP), W18X71
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EXIST WOOD LAGGING (TYP)
AutoCAD SHX Text EXIST GROUND ANCHORS AND STEEL WALER, REMOVE AND DISPOSE OF WALER, ABANDON GROUND ANCHORS
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EXIST CONC PILE (TYP)
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OG (FRONT)
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OG (BEHIND)
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CIDH CONC PILE (TYP)
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NEW CONC GUTTER F/L ELEV AT 543.00
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EXIST PIPES (TYP)
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DI, SEE DETAIL 1 ON SHT 9
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DI, SEE DETAIL 1 ON SHT 9
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TW
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BEGIN EARTH FILL EMB
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LERIDA CT
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1 LERIDA CT APN: 077353110
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15 LERIDA CT APN: 077353240
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25 LERIDA CT APN: 077353460
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SITE ACCESS
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FRONT FACE OF EXISTING WALL
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EXIST 24'' CIDH PILE (TYP)
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EXIST SOLDIER PILE, W18X71 (TYP)
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EXIST SOLDIER PILE AND WOOD LAGGING RW WITH GROUND ANCHORS, STA 1+20 TO 2+94
AutoCAD SHX Text SHOTCRETE RETAINING WALL ON CIDH CONC PILES WITH WALER AND TWO ROWS OF GROUND ANCHORS
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UPPER WALL LOL (EXIST WALL FACE)
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LOWER GROUND ANCHORS (TYP)
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UPPER GROUND ANCHORS (TYP)
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EXIST CL FENCE
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DOWNSLOPE EDGE OF EARTH FILL EMB
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EXIST WALL GROUND ANCHORS (TYP)
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CALTRANS STD PLAN T58
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PROJECT NO.:
AutoCAD SHX Text 0207542
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APPROVED:
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DATE:
AutoCAD SHX Text KRZYSZTOF LISAJ, DEPUTY DIRECTOR OF ENGINEERING AND RESOURCE PROTECTION R. C. E. # 84003
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REVISION
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ORIGINAL SCALE IS IN INCHES
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FOR REDUCED PLANS
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FILE NO.
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AutoCAD SHX Text 555 COUNTY CENTER, 5th FLOOR
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REDWOOD CITY, CALIFORNIA 94063
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DESIGNED BY:
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CHECKED BY:
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DRAWN BY:
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SHEET OF
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ANN MADER STILLMAN DIRECTOR OF PUBLIC WORKS COUNTY SAN MATEO
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IMPROVEMENT PROJECT, LADERA, CALIFORNIA
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LERIDA COURT AND GABARDA WAY RETAINING WALLS
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AS SHOWN
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UPPER WALL PLAN AND ELEVATION
AutoCAD SHX Text NOTES: 1. THE LENGTH OF EXISTING PILES ARE APPROXIMATE. THE LENGTH OF EXISTING PILES ARE APPROXIMATE. 2. THE ALIGNMENT OF THE EXISTING WALL IS APPROXIMATE. THEREFORE, THE STATIONING FOR THE THE ALIGNMENT OF THE EXISTING WALL IS APPROXIMATE. THEREFORE, THE STATIONING FOR THE NEW PILES IS FOR REFERENCE ONLY. THE NEW CONCRETE PILES SHALL BE POSITIONED AT THE CENTERLINE BETWEEN THE ADJACENT EXISTING I-BEAMS. 3. DO NOT REMOVE EXISTING STEEL WALERS UNTIL THE NEW LOWER LEVEL GROUND ANCHORS ARE DO NOT REMOVE EXISTING STEEL WALERS UNTIL THE NEW LOWER LEVEL GROUND ANCHORS ARE INSTALLED, TESTED, AND LOCKED-OFF.
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*SEE DETAIL 1 ON SHT 8 FOR PILE CUT-OFF ELEV DET
mraman Typewritten Text 2/20/2026
TYPICAL SECTION AT LOWER GROUND ANCHOR 1
TYPICAL SECTION AT UPPER GROUND ANCHOR 2
TYPICAL SECTION AT EXIST PILE 3
HALEY & ALDRICH, INC.
785 Ygnacio Valley Road Walnut Creek, CA 94595 Tel: 925.935.9771 www.haleyaldrich.com
CO
UN
TY OF SAN MATEO
P U
B L I C W O R
K S
E5022
MATERIALSLOWER WALL GROUND ANCHOR REQUIREMENTSUPPER WALL GROUND ANCHOR REQUIREMENTS
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GROUND ANCHOR, CONTRACTOR-DESGINED
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EXIST WOOD LAGGING
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FG, 1.5H:1V OR FLATTER, MIN 5H:1V, EXC OR BKF AS REQD
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CIDH CONC PILE SEE DETAIL 1 ON SHT 8
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CONC WALER
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#5 AT 12", EA WAY, EA FACE
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#8, TOT 6
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#4 CLOSED STIRRUP AT 9", 3" CLR (TYP), OMIT AT PILES
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TW ELEV
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EXIST DRAINAGE PIPE (WHERE OCCURS) EXTEND TO WALL FACE
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REMOVE UPPER LAGGING BOARD(S) TO AVOID CONC GUTTER
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SINGLE-SIDED GEOCOMPOSITE DRAIN 3" HOLE AT WEEPHOLES
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SCULPTED SHOTCRETE, COLORED (LOWER WALL)
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STRUCTURAL SHOTCRETE, COLORED WITH TROWELED FINISH (UPPER WALL)
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CONC GUTTER, SEE DETAIL 3 ON SHT 9
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3"MAX
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3"MAX
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3"MAX
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3"MAX
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3" WEEPHOLE, CENTER B/T EXIST PILES CUT HOLE THROUGH GEOCOMPOSITE DRAIN
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BOT OF WALER (PROJECTED)
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PILE CUT-OFF ELEV, SEE DETAIL 1 ON SHT 8
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LOL
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4' CL FENCE, CALTRANS STD PLAN A85
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POST POCKET, CALTRANS STD PLAN B11-47
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GROUND ANCHOR ELEV AT FACE OF EXIST STEEL BEAM
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TW ELEV
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MC 18X58 (TYP), TOT 2
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GROUND ANCHOR, CONTRACTOR-DESIGNED
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END PLATE (PROJECTED)
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BEARING PLATE
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LOL
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FG BELOW WALL
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EXIST STL I-BEAM, CUT TOP TOP TO AVOID CONC GUTTER
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EXIST CIDH PILE 36" DIA FOR LOWER WALL (AS SHOWN) 24" DIA FOR UPPER WALL
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CONC WALER
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CHISEL EXIST PILE CONC IN CONFLICT WITH WALER
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34'' NELSON S3L STUDS
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TW ELEV
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34'' NELSON S3L STUDS
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LOL
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EXIST PILE FACE
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RETAINING WALL DETAILS (1 OF 2)
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PROJECT NO.:
AutoCAD SHX Text 0207542
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APPROVED:
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DATE:
AutoCAD SHX Text KRZYSZTOF LISAJ, DEPUTY DIRECTOR OF ENGINEERING AND RESOURCE PROTECTION R. C. E. # 84003
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DATE
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REVISION
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ORIGINAL SCALE IS IN INCHES
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FOR REDUCED PLANS
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FILE NO.
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SCALE:
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DATE:
AutoCAD SHX Text 555 COUNTY CENTER, 5th FLOOR
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REDWOOD CITY, CALIFORNIA 94063
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DESIGNED BY:
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CHECKED BY:
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DRAWN BY:
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SHEET OF
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ANN MADER STILLMAN DIRECTOR OF PUBLIC WORKS COUNTY SAN MATEO
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IMPROVEMENT PROJECT, LADERA, CALIFORNIA
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LERIDA COURT AND GABARDA WAY RETAINING WALLS
AutoCAD SHX Text 02-11-2026
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AS SHOWN
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MA
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AutoCAD SHX Text SHOTCRETE f'c = 4,000 PSI * REINFORCING STEEL fy = 60,000 PSI STRUCTURAL STEEL fy = 50,000 PSI * COLOR (STAIN TO BE APPLIED AFTER INSTALLATION) WILL BE SPECIFIED BY THE ENGINEER.COLOR (STAIN TO BE APPLIED AFTER INSTALLATION) WILL BE SPECIFIED BY THE ENGINEER.
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