Redwood_City_FY21 Plan Sheet G-02 (7 Apr 21) Amendment1.pdf
PDF 294 KB Posted
- Attached to
- Redwood City Channel Maintenance Dredging
- Solicitation number
- W912P721B0003
About this file
This document package includes plans and specifications for a federal dredging contract opportunity along with the related solicitation notice. The plans provide details for maintenance dredging of the Redwood City Channel in San Mateo County, California to a depth of 30 feet below MLLW plus a 2-foot paid allowable overdepth. Work will include contour dredging between station 0+00 and 208+49 and transporting dredged materials to the government furnished Alcatraz Island disposal site SF-11 as well as a contractor furnished beneficial reuse upland site. The related solicitation is a small business set-aside seeking fixed price bids for the dredging work. The NAICS code for the project is 237990 and the solicitation was issued by the Department of the Army Corps of Engineers San Francisco District.
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Text version
G-02
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US Army Corps of Engineers
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C:\Users\L3ET9FS9\Desktop\E-Documents\O&M\RedwoodCity\RedwoodCityFY21\Plans\CAD\ Redwood_City_O&M_2021 (G01 - G03).dwg 07 Apr 2021 - 9:47am
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SOLICITATION
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GENERAL NOTES:
1. THE REDWOOD CITY CHANNEL WAS SURVEYED BY THE CORPS OF
ENGINEERS, SAN FRANCISCO DISTRICT, ON 8 AND 9 DECEMBER 2020.
2. BATHYMETRIC SURVEY SOUNDINGS ARE BASED ON THE DATUM OF
MEAN LOWER LOW WATER (MLLW) AT THE LOCALITY.
3. DRAWINGS ARE NOT TO BE USED AS NAVIGATION CHARTS.
4. INFORMATION SHOWN ON THE DRAWINGS IS BASED ON
BATHYMETRIC SURVEYS MADE ON THE DATES INDICATED AND CAN
ONLY BE CONSIDERED AS INDICATING THE GENERAL CONDITIONS
EXISTING AT THAT TIME.
5. BATHYMETRIC SURVEY SOUNDINGS WERE TAKEN BY FATHOMETER
(MULTI-BEAM SURVEY EQUIPMENT) AND ARE SHOWN TO THE
NEAREST TENTH OF A FOOT.
6. PLANE GRID, BEARING AND COORDINATES ARE BASED ON THE STATE
OF CALIFORNIA COORDINATE SYSTEM NAD 83, LAMBERT CONFORMAL
PROJECTION, ZONE III CALIFORNIA, AS DESCRIBED IN SPECIAL
PUBLICATION NO. 253, PUBLISHED BY NATIONAL OCEAN SURVEY.
7. PROJECT DEPTH IS -30 FEET AT MLLW THE DISPOSAL SITES ARE
ALCATRAZ DISPOSAL SITE SF-11 & THE CONTRACTOR-FURNISHED
BENEFICIAL REUSE UPLAND SITE. SEE SECTION 00 10 00 PRICING
SCHEDULE AND SECTION 35 20 24 AQUATIC DISPOSAL FOR SITE
DETAILS.
8. TIDES DERIVED FROM PPRTK USING GEOID09 AND VDATUM MODELS
CALIBRATED TO RAZ-6 MLLW ELEVATION.
9. AERIAL IMAGE COURTESY OF ESRI, DIGITALGLOBE, GEOEYE,
EARTHSTAR GEOGRAPHICS, CNES/AIRBUS DS, USDA, USGS, AEX,
GETMAPPING, AEROGRID, IGN, IGP, SWISSTOPO, AND THE GIS USER
COMMUNITY.
10. SEDIMENT SAMPLING AND TESTING RESULTS AVAILABLE UPON
REQUEST.
SHEET SHEET
NUMBER ID DESCRIPTION
01 G-01 COVERSHEET
02 G-02 SCHEDULE OF DRAWINGS, ALCATRAZ DISPOSAL SITE SF-11,
GENERAL NOTES AND TYPICAL DREDGING SECTION
03 G-03 PROJECT SITE REFERENCE PLAN AND CHANNEL CONTROL
POINT TABLES
04 C-01 DREDGING PLAN
STA 0+00 - STA 52+00
05 C-02 DREDGING PLAN
STA 52+00 - STA 114+00
06 C-03 DREDGING PLAN
STA 114+00 - STA 166+00
07 C-04 DREDGING PLAN
STA 166+00 - STA 208+49
SCHEDULE OF DRAWINGS
TYPICAL DREDGING SECTION
NOT TO SCALE
AREA
H
AREA
C
AREA
I
AREA
G
AREA
F
AREA
E
AREA
D
AREA
A
AREA
B
D
E 6006675
N 2127907
E
E 6006933
N 2127178
C
E 6005967
N 2128233
B
E 6005567
N 2128164
A
E 6005195
N 2127907
T
E 6005967
N 2127907
U
E 6005567
N 2127907
CENTER POINT COORDINATES
E 6005935
N 2127234
Q
E 6005967
N 2126732
R
E 6006167
N 2126732
P
E 6005967
N 2126632
L
E 6005367
N 2126707
N
E 6005767
N 2126658
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E 6005767
N 2126632
M
E 6005367
N 2126658
K
E 6005085
N 2126707
J
E 6005367
N 2126411
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E 6005767
N 2126249
H
E 6005967
N 2126235
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E 6006467
N 2126387
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E 6006167
N 2126261
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E 6006467
N 2126907
ALCATRAZ ISLAND DISPOSAL SITE, SF-11
MATERIAL DISPOSED OF ONLY IN SUB-AREAS C, H, AND I (SHADED AREAS)
NOT TO SCALE
ACCEPTANCE REACHES
REACH 1: STA 0+00 TO STA 84+00
REACH 2: STA 84+00 TO STA 111+00
REACH 3: STA 111+00 TO STA 122+00
REACH 4: STA 122+00 TO STA 164+00
REACH 5: STA 164+00 TO STA 177+00
REACH 6: STA177+00 TO STA 208+49
VERTICAL CONTROL
NOAA STATION: 941.4523
HORIZONTAL GPS CONTROL
COAST GUARD D-BEACON
ABBREVIATIONS:
MLLW MEAN LOWER LOW WATER
PPRTK POINT POSITIONING REAL TIME KINEMATIC
EL. 0.00 FEET MLLW
1.5' ALLOWABLE (PAID) OVERDEPTH
PROJECT DEPTH
NOTE:
SEE SPECIFICATION SECTION 35 20 23 (DREDGING) FOR DETAILS.
MATERIAL TO BE DREDGED USING
CONTOUR DREDGING (PAID)
NO DREDGING ON SIDE SLOPES
(SEE NOTE)
EXISTING CHANNEL BOTTOM
SIDE-SLOPE PRISM
CHANNEL WIDTH VARIES
SEE PLAN
2' ALLOWABLE OVERDEPTH
(PAID AND NON-PAID)
0.5' ALLOWABLE OVERDEPTH (NON-PAID)
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