Attachment_H_Middlefield_Road_Plans_and_Specs_for_Landscaping.pdf

PDF 20 MB Posted Sep 30, 2025

Attached to: Landscaping and Grounds Maintenance Services
Solicitation number: 2026-RFP-00070
Issued by: San Mateo County, California

About this file

Written by GovTribe AI · Oct 27, 2025

The attached file is a series of technical engineering drawings (sheets GI-1 through GI-13) for the Middlefield Road Improvement Project by San Mateo County, California, specifically focusing on Green Infrastructure (GI) and landscaping plans. The drawings detail comprehensive design specifications for bioretention planters, storm drain connections, irrigation systems, utility wall penetrations, and landscaping infrastructure along Middlefield Road, spanning multiple city intersections including Pacific Avenue, Dumbarton Avenue, Berkshire Avenue, First Avenue, Second Avenue, Third Avenue, Fourth Avenue, and Fifth Avenue. The project involves intricate green infrastructure elements such as modified tree wells, underground gravel connections, overflow structures, and detailed utility integration with new landscaping features.

The technical drawings provide precise engineering specifications for utility crossings, storm drain connections, water main interfaces, and planter construction, with extensive notes on installation requirements, soil composition, drainage systems, and compliance with local and state infrastructure standards. The plans include detailed sections on engineered bioretention soil, underdrain systems, clean-out mechanisms, and specific requirements for tree planting, utility penetrations, and landscape infrastructure. The drawings are dated October 16, 2020, with an "Issue for Bid" notation and indicate collaboration between San Mateo County Public Works and engineering consultants, suggesting this is part of a larger infrastructure and landscape improvement initiative aimed at enhancing urban environmental infrastructure and stormwater management along the Middlefield Road corridor.

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GREEN INFRASTRUCTURE

GI-1

10/16/2020

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MODIFIED TREE WELL WITH GRAVEL JACKET FOR STORAGE (TYP.)

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UNDERGROUND GRAVEL CONNECTION TO ALLOW CONNECTIVITY BETWEEN TREE WELLS (TYP.)

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(E) SDDI 60418 RIM 24.63 INV 18" RCP 17.88 IN (W) INV 36" RCP 17.93 IN (E) INV 36" RCP 17.61 OUT (N)

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(E) SDMH 60417 RIM 25.37 INV 12" RCP 18.12 IN (S) INV 18" RCP 18.04 OUT (E)

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(E) SDDI 60428 RIM 24.78

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OVERFLOW STRUCTURE TO (E) STORMDRAIN SYSTEM

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27' - (N) 12" SD CONNECTING PACIFIC AVE OVERFLOW DEVICE TO (E) SD

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CONNECTION TO (E) SD MH INV 24" RCP 18.02 OUT (W) INV 24" RCP 18.18 IN (S)

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12" SD INV 18.27

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REDWOOD CITY, CALIFORNIA 94063

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DRAWN BY:

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SAN MATEO COUNTY

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JAMES C. PORTER, DIRECTOR OF PUBLIC WORKS

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JAMES C. PORTER, DIRECTOR OF PUBLIC WORKS

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R. C. E. # 48056 / EXPIRES 12-31-2021

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STA: 24+50.00 - SEE SHEET GI-2

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PACIFIC AVE

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AutoCAD SHX Text NOTES: 1. SEE G-2 TO G-3 FOR GENERAL NOTES, CONSTRUCTION NOTES, AND BIORETENTION CONSTRUCTION NOTES. SEE G-2 TO G-3 FOR GENERAL NOTES, CONSTRUCTION NOTES, AND BIORETENTION CONSTRUCTION NOTES. 2. SEE GI-6 TO GI-13 FOR GI SECTIONS AND DETAILS SEE GI-6 TO GI-13 FOR GI SECTIONS AND DETAILS 3. SEE PP-2 TO PP-6 FOR GRADING INFORMATION SEE PP-2 TO PP-6 FOR GRADING INFORMATION 4. THE ORDER OF CONSTRUCTION SHALL BE AS FOLLOWS: (1) TRAFFIC SIGNAL POLE, (2) PLANTER/GI PIPING, THE ORDER OF CONSTRUCTION SHALL BE AS FOLLOWS: (1) TRAFFIC SIGNAL POLE, (2) PLANTER/GI PIPING, (3) SANITARY SEWER, (4) JOINT TRENCH, (5) SIDEWALK, CURB, AND GUTTER. 5. SEE DETAIL 1/GI-12 FOR TYPICAL BIORETENTION PLANTER DETAIL.SEE DETAIL 1/GI-12 FOR TYPICAL BIORETENTION PLANTER DETAIL.

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PACIFIC AVENUE AND MIDDLEFIELD ROAD

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SOUTHWEST PLANTER

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(N) 12" OVERFLOW DEVICE RIM 24.97 INV 18.15 IN (S) INV 18.15 OUT (N)

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ISSUE FOR BID

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AutoCAD SHX Text 300 California Street, Suite 600 San Francisco, Ca 94104 Tel: 415-796-8100 fax: 415-796-8200

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DRAINS TO WATERWAY MARKER

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AutoCAD SHX Text INSTALL (N) CB FL 28.12 INV 24.50 CONNECT TO (E) 18" SD USING GI WYE CONNECTION DETAIL (W/O CO) INV 24.16

AutoCAD SHX Text NORTH DUMBARTON BIORETENTION RECEIVING RUNOFF FROM UPSTREAM BLOCK VIA SUBSURFACE PIPE

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(E) SDMH 60454 RIM 29.54 INV 18" 26.10 IN (SE) INV 18" 25.27 OUT (NW)

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(E) SDDI 60458 RIM 28.88

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80' - (N) 8" SD LINE CONNECTING OVERFLOW DEVICES IN BIORETENTION PLANTERS

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54' - (N) 8" SD LINE CONNECTING OVERFLOW DEVICES IN BIORETENTION PLANTERS

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NON-GI PLANTER WITH 12" GRASS

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(E) 24" SS INV 22.19

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REDWOOD CITY, CALIFORNIA 94063

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SAN MATEO COUNTY

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JAMES C. PORTER, DIRECTOR OF PUBLIC WORKS

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JAMES C. PORTER, DIRECTOR OF PUBLIC WORKS

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R. C. E. # 48056 / EXPIRES 12-31-2021

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(N) 12" OVERFLOW DEVICE RIM 27.19 INV 20.57 IN (E) INV 20.57 OUT (N)

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(N) 12" OVERFLOW DEVICE RIM 27.42 INV 24.34 OUT (W)

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DUMBARTON AVENUE AND MIDDLEFIELD ROAD

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NORTHEAST PLANTER

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NORTHWEST PLANTER

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DUMBARTON AVENUE AND MIDDLEFIELD ROAD

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GI-2

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SOUTHEAST PLANTER

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DUMBARTON AVENUE AND MIDDLEFIELD ROAD

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GI-2

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SOUTHWEST PLANTER

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GI-2

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(N) 12" OVERFLOW DEVICE RIM 28.68 INV 26.35 OUT (W)

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TIE-BEAM

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BERKSHIRE AVENUE AND MIDDLEFIELD ROAD

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GI-2

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NORTHWEST PLANTER

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DRAINAGE NOTCH AT 4' OC (TYP)

AutoCAD SHX Text CONNECTION TO (E) SD (N) 2'x2' CONCRETE JUNCTION BOX WITH HINGED LID INV 26.30

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(N) CLEAN-OUT

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(N) CLEAN-OUT

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(N) CLEAN-OUT

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(N) CLEAN-OUT

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(N) CLEAN-OUT

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GI-13

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GI-13

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GI-12

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5' - (N) 8" SD

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GI-12

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GI-12

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(N) CURB CUT

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(N) CURB CUT

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GI-11

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(N) CURB CUT

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GI-11

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(N) CURB CUT OUTFLOW

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GI-11

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GI-11

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(N) CURB CUT OUTFLOW

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GI-11

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(N) CURB CUT INFLOW

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GI-11

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GI-12

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AutoCAD SHX Text 10-16-20

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ISSUE FOR BID

AutoCAD SHX Text 6/30/21

AutoCAD SHX Text 300 California Street, Suite 600 San Francisco, Ca 94104 Tel: 415-796-8100 fax: 415-796-8200

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ISSUE FOR BID

AutoCAD SHX Text 10-16-20

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DRAINS TO WATERWAY MARKER (TYP)

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GI-11

P E

X I N

P E

X I N

SFPUC

OWNED

PARCEL 1

(NO. 2066)

SFPUC OWNED

PARCEL 2

(NO. 2066)

SFPUC

OWNED

PARCEL 1

(NO. 2834)

B U S Z O N E

1/E4931

GREEN INFRASTRUCTURE

GI-3

10/16/2020

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8" DI

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6" AC

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6" AC

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6" AC

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8" TRANS

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8" TRANS

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60" BDPL #5

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60" BDPL #2

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60" BDPL #1

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PBT

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18" RCP

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18" RCP

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COMPACT

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NON-GI PLANTER WITH 12" GRASS

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SPECIAL PAVING WITH SITE FURNISHING FOR PUBLIC SPACE SEE SHEET L-8 FOR DETAILS

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SPECIAL PAVING WITH SITE FURNISHING FOR PUBLIC SPACE SEE SHEET L-8 FOR DETAILS

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(E) SDDI 60489 RIM 29.32 INV 18" RCP 22.43 OUT (S)

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(E) SDDI 60476 RIM 30.12 INV 18" RCP 23.72 IN (NE) INV 18" 23.48 OUT (SW)

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(E) SDDI 60468 RIM 29.25 INV 18" RCP 22.95 IN (N) INV 36" BOX WIDTH 22.36 OUT (W)

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(E) SDDI 60464 RIM 28.84 INV 18" RCP 21.74 OUT (SW)

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CONNECTION TO (N) 8" SD INV 22.80 THROUGH

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45' - (N) 8" SD LINE FROM OVERFLOW DEVICE TO (E) SD LINE

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STA: 31+01, 22.46 RT CONNECTION TO (E) SD INV 22.58

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NON-GI PLANTER WITH 12" GRASS

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NON-GI PLANTER WITH 12" GRASS

AutoCAD SHX Text 6J

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BP STA: 30+52, 27.7' RT

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OD STA: 30+60, 27.0' RT

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WYE STA: 30+61, 22.5' RT

AutoCAD SHX Text B44

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CL1

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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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CHECKED BY:

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DRAWN BY:

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SAN MATEO COUNTY

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JAMES C. PORTER, DIRECTOR OF PUBLIC WORKS

AutoCAD SHX Text FILENAME: C:\USERS\JASON.YEE\ONEDRIVE - AECOM DIRECTORY\DOCUMENTS\MIDDLEFIELD ROAD\CHECKED-OUT DRAWINGS\GI\GI\GI-03.DWG (GI-3) C:\USERS\JASON.YEE\ONEDRIVE - AECOM DIRECTORY\DOCUMENTS\MIDDLEFIELD ROAD\CHECKED-OUT DRAWINGS\GI\GI\GI-03.DWG (GI-3) (GI-3) GI-3) )

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JAMES C. PORTER, DIRECTOR OF PUBLIC WORKS

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R. C. E. # 48056 / EXPIRES 12-31-2021

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APPROVED:

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DATE:

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EXPIRES

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AS SHOWN

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COUNTY OF SAN MATEO

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MIDDLEFIELD ROAD IMPROVEMENT PROJECT

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STA: 30+00.00 - SEE SHEET GI-230+00.00 - SEE SHEET GI-2

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STA: 36+00.00 - SEE SHEET GI-4

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MIDDLEFIELD ROAD

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FIRST AVE

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FIRST AVE

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SECOND AVE

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SECOND AVE

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AutoCAD SHX Text 1 inch = 20 ft.

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( IN FEET )

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1" PVC

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MACARTHUR AVE

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HURLINGAME AVE

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NORTHSIDE AVE

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PACIFIC AVE

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DUMBARTON AVE

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BERKSHIRE AVE

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FIRST AVE

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SECOND AVE

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THIRD AVE

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%%UKEY MAP

AutoCAD SHX Text 10-16-2020

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SHEET 77 OF 140

AutoCAD SHX Text NOTES: 1. SEE G-2 TO G-3 FOR GENERAL NOTES, CONSTRUCTION NOTES, AND BIORETENTION CONSTRUCTION NOTES. SEE G-2 TO G-3 FOR GENERAL NOTES, CONSTRUCTION NOTES, AND BIORETENTION CONSTRUCTION NOTES. 2. SEE GI-6 TO GI-13 FOR GI SECTIONS AND DETAILS. SEE GI-6 TO GI-13 FOR GI SECTIONS AND DETAILS. 3. SEE PP-2 TO PP-6 FOR GRADING INFORMATION. SEE PP-2 TO PP-6 FOR GRADING INFORMATION. 4. THE ORDER OF CONSTRUCTION SHALL BE AS FOLLOWS: (1) TRAFFIC SIGNAL POLE, (2) PLANTER/GI PIPING, THE ORDER OF CONSTRUCTION SHALL BE AS FOLLOWS: (1) TRAFFIC SIGNAL POLE, (2) PLANTER/GI PIPING, (3) SANITARY SEWER, (4) JOINT TRENCH, (5) SIDEWALK, CURB, AND GUTTER. 5. SEE DETAIL 1/GI-12 FOR TYPICAL BIORETENTION PLANTER DETAIL.SEE DETAIL 1/GI-12 FOR TYPICAL BIORETENTION PLANTER DETAIL.

AutoCAD SHX Text

(N) 12" OVERFLOW DEVICE RIM 29.32 INV 22.82 OUT (E)

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(N) CLEAN-OUTCLEAN-OUT

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CONNECTION TO (N) 8" SD INV 22.80 THROUGH

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(N) CLEAN-OUTCLEAN-OUT

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TIE-BEAM

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FIRST AVENUE AND MIDDLEFIELD ROAD

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GI-3

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NORTHWEST PLANTER

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AutoCAD SHX Text 1 inch = 4 ft.

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( IN FEET )

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GI-3

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GI-8

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GI-8

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GI-12

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4' - (N) 6" SD

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GI-13

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GI-12

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GI-12

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DRAINAGE NOTCH AT 4' OC

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GI-12

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(N) CURB CUT

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GI-11

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(N) CURB CUT INFLOW

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GI-11

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FIRST AVENUE AND MIDDLEFIELD ROAD

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GI-3

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SOUTHWEST PLANTER

AutoCAD SHX Text

GI-3

AutoCAD SHX Text CONTRACTOR TO HOT TAP WATER MAIN WITH TAPPING SLEEVE FOR 1" SERVICE WITH CORPORATION STOP PER CAL WATER SPECIFICATIONS

AutoCAD SHX Text 18"Lx30"Lx4"T CONCRETE PAD FOR BACKFLOW PREVENTER ENCLOSURE (SEE L DRAWINGS FOR DETAIL).

AutoCAD SHX Text 3/4" METER IN METER BOX (10"Wx15"Lx12"D)

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AutoCAD SHX Text 1 inch = 4 ft.

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( IN FEET )

AutoCAD SHX Text C 89909 8990989909

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AutoCAD SHX Text 10-16-20

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ISSUE FOR BID

AutoCAD SHX Text 6/30/21

AutoCAD SHX Text 300 California Street, Suite 600 San Francisco, Ca 94104 Tel: 415-796-8100 fax: 415-796-8200

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ISSUE FOR BID

AutoCAD SHX Text 10-16-20

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DRAINS TO WATERWAY MARKER

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GI-11

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GI-13

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GI-13

P E

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B U S Z O N E

1/E4931

GREEN INFRASTRUCTURE

GI-4

10/16/2020

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6" AC

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6" AC

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6" AC

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6" AC

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24" RCP

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18" RCP

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18" RCP

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COMPACT

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COMPACT

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COMPACT

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AutoCAD SHX Text (Already UG)

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AutoCAD SHX Text 398/396

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AutoCAD SHX Text (A,B,C&D)

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(E) SDDI 60510 RIM 31.48 INV 18" RCP 25.66 OUT (SW) DEBRIS IN BOTTOM

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(E) SDDI 60498 RIM 30.49 INV 24" RCP 25.04 OUT (SW)

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(E) SDDI 60500 RIM 30.77 INV 24" RCP 24.65 BOTTOM BOX (STANDING WATER NO PIPE VISIBLE)

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(E) SDDI 60511 RIM 32.12 INV 18" RCP 24.94 (SE)

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CONNECTION TO (E) 18" SD STA: 39+96, 19.0' RT INV 25.14 CROWN 26.64

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CONNECTION TO (N) 8" SD WYE STA: 40+22, 19.0' RT INV 26.77

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CONNECTION TO (E) 24" SD STA: 36+66, 19.0' RT INV 24.77 CROWN 26.77

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CONNECTION TO (N) 8" SD WYE STA: 39+46, 19.0' RT INV 28.17

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CONNECTION TO STA: 37+23, 19.0' (N) 8" SD INV 26.00

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281' - (N) 8" SD LINE IN STREET

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225' - (N) 8" SD LINE IN STREET

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50' - (N) 8" SD LINE FROM (N) OVERFLOW DEVICE TO (E) SD LINE IN STREET

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258' - (N) 8" SD LINE IN STREET

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BP STA: 37+25, 28.2' RT

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OD STA: 37+27, 26.8' RT

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BR STA: 37+02, 27.8' LT

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OD STA: 37+04, 29.5' LT

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BR STA: 39+19, 27.8' LT

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OD STA: 39+12.5, 29.5' LT

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OD STA: 39+50, 27.4' RT

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BR STA: 39+41.6, 27.8' RT

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OD STA: 40+23.7, 27.1' RT

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BR STA: 40+35, 27.7' RT

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DATE

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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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CHECKED BY:

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DRAWN BY:

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SAN MATEO COUNTY

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JAMES C. PORTER, DIRECTOR OF PUBLIC WORKS

AutoCAD SHX Text FILENAME: C:\USERS\JASON.YEE\ONEDRIVE - AECOM DIRECTORY\DOCUMENTS\MIDDLEFIELD ROAD\CHECKED-OUT DRAWINGS\GI\GI\GI-04.DWG (GI-4) C:\USERS\JASON.YEE\ONEDRIVE - AECOM DIRECTORY\DOCUMENTS\MIDDLEFIELD ROAD\CHECKED-OUT DRAWINGS\GI\GI\GI-04.DWG (GI-4) (GI-4) GI-4) )

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JAMES C. PORTER, DIRECTOR OF PUBLIC WORKS

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R. C. E. # 48056 / EXPIRES 12-31-2021

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APPROVED:

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DATE:

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AS SHOWN

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COUNTY OF SAN MATEO

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MIDDLEFIELD ROAD IMPROVEMENT PROJECT

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MIDDLEFIELD ROAD

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THIRD AVE

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THIRD AVE

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FOURTH AVE

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STA: 36+00.00 - SEE SHEET GI-3

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STA: 42+00.00 - SEE SHEET GI-5

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FOURTH AVE

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( IN FEET )

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MACARTHUR AVE

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HURLINGAME AVE

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NORTHSIDE AVE

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PACIFIC AVE

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DUMBARTON AVE

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FIRST AVE

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%%UKEY MAP

AutoCAD SHX Text 10-16-2020

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SHEET 78 OF 140

AutoCAD SHX Text NOTES: 1. SEE G-2 TO G-3 FOR GENERAL NOTES, SEE G-2 TO G-3 FOR GENERAL NOTES, CONSTRUCTION NOTES, AND BIORETENTION CONSTRUCTION NOTES. 2. SEE GI-6 TO GI-13 FOR GI SECTIONS SEE GI-6 TO GI-13 FOR GI SECTIONS AND DETAILS. 3. SEE PP-2 TO PP-6 FOR GRADING SEE PP-2 TO PP-6 FOR GRADING INFORMATION. 4. THE ORDER OF CONSTRUCTION SHALL BE THE ORDER OF CONSTRUCTION SHALL BE AS FOLLOWS: (1) TRAFFIC SIGNAL POLE, (2) PLANTER/GI PIPING, (3) SANITARY SEWER, (4) JOINT TRENCH, (5) SIDEWALK, CURB, AND GUTTER. 5. SEE DETAIL 1/GI-12 FOR TYPICAL SEE DETAIL 1/GI-12 FOR TYPICAL BIORETENTION PLANTER DETAIL.

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AutoCAD SHX Text 1 inch = 4 ft.

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( IN FEET )

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(N) 18" OVERFLOW DEVICE RIM 30.83 INV 27.33 IN (S) INV 26.33 OUT (W)

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THIRD AVENUE AND MIDDLEFIELD ROAD

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GI-4

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SOUTHEAST PLANTER

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THIRD AVENUE AND MIDDLEFIELD ROAD

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GI-4

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SOUTHWEST PLANTER

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FOURTH AVENUE AND MIDDLEFIELD ROAD

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GI-4

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NORTHEAST PLANTER

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FOURTH AVENUE AND MIDDLEFIELD ROAD

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GI-4

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NORTHWEST PLANTER

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FOURTH AVENUE AND MIDDLEFIELD ROAD

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GI-4

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SOUTHWEST PLANTER

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GI-4

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GI-4

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GI-4

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GI-4

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GI-4

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(N) CLEAN-OUT

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(N) 12" OVERFLOW DEVICE RIM 31.52 INV 26.12 OUT (N)

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(N) CLEAN-OUT

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(N) CLEAN-OUT

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CONNECTION TO (N) SD INV 26.00 THROUGH

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(N) 12" OVERFLOW DEVICE RIM 32.40 INV 28.43 OUT (N)

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(N) CLEAN-OUT

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(N) 12" OVERFLOW DEVICE RIM 32.41 INV 28.20 OUT (E)

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CONNECTION TO (N) SD INV 29.17 THROUGH

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(N) CLEAN-OUT

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(N) CLEAN-OUT

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AutoCAD SHX Text 10-16-20

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ISSUE FOR BID

AutoCAD SHX Text 6/30/21

AutoCAD SHX Text 300 California Street, Suite 600 San Francisco, Ca 94104 Tel: 415-796-8100 fax: 415-796-8200

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DRAINS TO WATERWAY MARKER (TYP)

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GI-11

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ISSUE FOR BID

10-16-20

P E

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10/16/2020

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6" AC

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(E) SDMH 60533 RIM 35.25 INV 18" 26.65 IN (SE) INV 24" 26.50 IN (SW) INV 24" 26.45 OUT (NE)

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CONNECTION TO (N) 8" SD INV 27.92

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48' - (N) 8" SD LINE FROM OVERFLOW STRUCTURE TO (N) SD IN STREET

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8' - (N) 8" SD LINE FROM OVERFLOW STRUCTURE TO (N) SD IN STREET

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258' - (N) 8" SD LINE IN STREE

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(E) SDDI 60530 RIM 33.95 INV 18" RCP 26.97 IN (SW) INV 24" RCP 26.93 OUT (NE)

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50' - (N) 12" SD, DIP SLOPE = 0.5%

AutoCAD SHX Text CONSTRUCT (N) SDDI STA:42+78.56 51.14' RT TG 33.9± (M)(N) INV 12" DIP OUT 31.50 (SE)

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TIE INTO (E) SDDI AT INV 12" DIP IN 31.21 (NW)

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BP STA: 42+47, 27.8' RT

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OD STA: 42+53, 27.1' RT

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BP STA: 42+27.6, 27.8' LT

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OD STA: 42+39, 28.0' LT

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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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CHECKED BY:

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DRAWN BY:

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SAN MATEO COUNTY

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JAMES C. PORTER, DIRECTOR OF PUBLIC WORKS

AutoCAD SHX Text FILENAME: C:\USERS\JASON.YEE\ONEDRIVE - AECOM DIRECTORY\DOCUMENTS\MIDDLEFIELD ROAD\CHECKED-OUT DRAWINGS\GI\GI\GI-05.DWG (GI-5) C:\USERS\JASON.YEE\ONEDRIVE - AECOM DIRECTORY\DOCUMENTS\MIDDLEFIELD ROAD\CHECKED-OUT DRAWINGS\GI\GI\GI-05.DWG (GI-5) (GI-5) GI-5) )

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JAMES C. PORTER, DIRECTOR OF PUBLIC WORKS

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R. C. E. # 48056 / EXPIRES 12-31-2021

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APPROVED:

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AS SHOWN

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COUNTY OF SAN MATEO

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MIDDLEFIELD ROAD IMPROVEMENT PROJECT

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STA: 42+00.00 - SEE SHEET GI-4

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MIDDLEFIELD ROAD

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FIFTH AVE

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FIFTH AVE

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( IN FEET )

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MACARTHUR AVE

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HURLINGAME AVE

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%%UKEY MAP

AutoCAD SHX Text 10-16-2020

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SHEET 79 OF 140

AutoCAD SHX Text NOTES: 1. SEE G-2 TO G-3 FOR GENERAL NOTES, CONSTRUCTION NOTES, AND BIORETENTION CONSTRUCTION SEE G-2 TO G-3 FOR GENERAL NOTES, CONSTRUCTION NOTES, AND BIORETENTION CONSTRUCTION NOTES. 2. SEE GI-6 TO GI-13 FOR GI SECTIONS AND DETAILS. SEE GI-6 TO GI-13 FOR GI SECTIONS AND DETAILS. 3. SEE PP-2 TO PP-6 FOR GRADING INFORMATION. SEE PP-2 TO PP-6 FOR GRADING INFORMATION. 4. THE ORDER OF CONSTRUCTION SHALL BE AS FOLLOWS: (1) TRAFFIC SIGNAL POLE, (2) PLANTER/GI THE ORDER OF CONSTRUCTION SHALL BE AS FOLLOWS: (1) TRAFFIC SIGNAL POLE, (2) PLANTER/GI PIPING, (3) SANITARY SEWER, (4) JOINT TRENCH, (5) SIDEWALK, CURB, AND GUTTER. 5. CONTRACTOR TO POTHOLE (E) FO CONDUITS IN VICINITY OF BIORETENTION PLANTER TO CONFIRM CONTRACTOR TO POTHOLE (E) FO CONDUITS IN VICINITY OF BIORETENTION PLANTER TO CONFIRM LOCATION. OVER EXCAVATION OF (E) CONDUITS MAY BE REQUIRED TO ALLOW SHIFTING OUT OF BIORETENTION PLANTER FOOTPRINT. 6. SEE DETAIL 1/GI-12 FOR TYPICAL BIORETENTION PLANTER DETAIL.SEE DETAIL 1/GI-12 FOR TYPICAL BIORETENTION PLANTER DETAIL.

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( IN FEET )

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(N) 12" OVERFLOW DEVICE RIM 33.31 INV 27.99 OUT (W)

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(N) 12" OVERFLOW DEVICE RIM 33.96 INV 27.96 OUT (E)

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FIFTH AVENUE AND MIDDLEFIELD ROAD

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GI-5

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NORTHEAST PLANTER

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FIFTH AVENUE AND MIDDLEFIELD ROAD

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GI-5

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NORTHWEST PLANTER

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(N) CLEAN-OUT

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(N) CLEAN-OUT

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(N) CLEAN-OUT

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CONNECTION TO (N) 8" SD INV 27.92 THROUGH

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GI-5

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GI-9

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GI-12

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(N) CURB CUT INFLOW

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GI-11

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SEE NOTE 5

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ISSUE FOR BID

AutoCAD SHX Text 6/30/21

AutoCAD SHX Text 300 California Street, Suite 600 San Francisco, Ca 94104 Tel: 415-796-8100 fax: 415-796-8200

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DRAINS TO WATERWAY MARKER (TYP)

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GI-11

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ISSUE FOR BID

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GI-13

GI-6

10/16/2020

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ENGINEERED BIORETENTION SOIL

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4" PERFORATED PVC UD 23.08

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(E) SS

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INV IN 21.19

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INV OUT 21.99

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4" SANDBED

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(N) 8" SD, 1.00%%% SLOPE

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(E) FO

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(N) 12" NYLOPLAST BIORETENTION UNIT OUTLET WITH DOME GRATE OR APPROVED EQUAL RIM 27.37

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(N) 12" NYLOPLAST BIORETENTION UNIT OUTLET WITH DOME GRATE OR APPROVED EQUAL RIM 27.23

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(N) 8" SD, 1.00%%% SLOPE

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(N) 8" SD, 1.00%%% SLOPE

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TOP OF PIPE (SHOWN AT ~18" COVER FROM EG)

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TOP OF PIPE (SHOWN AT ~30" COVER FROM EG)

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TOP OF PIPE (SHOWN AT ~30" COVER FROM EG)

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FL 27.52

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FL 27.38

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CURB RAMP

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ENGINEERED BIORETENTION SOIL

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4" PERFORATED PVC UD 26.35

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(N) 2'x2' CONCRETE JUNCTION BOX WITH HINGED LID

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(N) 24" SS

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TOP OF PIPE 25.18

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(E) 18" SD INV THROUGH 26.30

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(N) 12" NYLOPLAST BIORETENTION UNIT OUTLET WITH DOME GRATE OR APPROVED EQUAL RIM 28.68

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FL 28.83

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REDVALVE CHECKMATE BACKFLOW DEVICE OR APPROVED EQUAL

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GI-12

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4" PERFORATED PVC UD 22.12

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(N) 12" SD INV THROUGH 18.1518.15

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FL 24.97

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CONTRACTOR TO UTILIZE FITTINGS TO TRANSITION OVERFLOW DEVICE TO DISCHARGE PIPE

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(N) VAULT SEE NOTE 9 (TYP)

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(N) JOINT TRENCH SEE NOTE 9 (TYP)

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(E) FO

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(E) FO, SEE NOTE 9 (TYP)

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(N) HOL & WIFI

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AutoCAD SHX Text 555 COUNTY CENTER, 5th FLOOR

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REDWOOD CITY, CALIFORNIA 94063

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CHECKED BY:

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DRAWN BY:

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SAN MATEO COUNTY

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JAMES C. PORTER, DIRECTOR OF PUBLIC WORKS

AutoCAD SHX Text FILENAME: C:\USERS\JASON.YEE\ONEDRIVE - AECOM DIRECTORY\DOCUMENTS\MIDDLEFIELD ROAD\CHECKED-OUT DRAWINGS\GI\GI\GI-06.DWG (GI-6) C:\USERS\JASON.YEE\ONEDRIVE - AECOM DIRECTORY\DOCUMENTS\MIDDLEFIELD ROAD\CHECKED-OUT DRAWINGS\GI\GI\GI-06.DWG (GI-6) (GI-6) GI-6) )

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JAMES C. PORTER, DIRECTOR OF PUBLIC WORKS

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R. C. E. # 48056 / EXPIRES 12-31-2021

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