ShorelineR23-03 G-03.pdf

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C:\Users\l3eteek9\Documents\Reach 1 related folders\22020.01-100pct\ ShorelineR23.dwg 25 Feb 2021 - 10:12am

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FOR PROPOSAL

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GENERAL NOTES:

1. NO DEFINITION IS MADE FOR THE END OF “REACH 2” AND THE START OF “REACH 3”. “REACH 2

AND 3” IS DEFINED AS THE REACH STARTING AT UNION PACIFIC AND ENDING AT ARTESIAN

SLOUGH.

2. CONTACT UNDERGROUND SERVICE ALERT (USA) NORTH PRIOR TO THE START OF

EXCAVATION. DO NOT START EXCAVATION UNTIL ALL NOTIFIED UTILITY MEMBERS HAVE

POSITIVELY RESPONDED.

3. UNLESS OTHERWISE NOTED, THE CONTRACTING OFFICER NEEDS TO BE NOTIFIED AT LEAST 48

HOURS IN ADVANCE OF INSPECTIONS.

4. LIMITS OF CONSTRUCTION INCLUDE FLOOD PROTECTION LEVEE EASEMENT AND TEMPORARY

WORK AREA EASEMENTS.

5. CONTACT UNION PACIFIC PRIOR TO THE START OF WORK IN TEMPORARY WORK AREA

EASEMENT (UNION PACIFIC). DO NOT START WORK UNTIL UNION PACIFIC HAS POSITIVELY

RESPONDED. WORK WITHIN 25 FEET OF ANY TRACK, OR WILL BE NEAR ENOUGH TO ANY TRACK

THAT ANY EQUIPMENT EXTENSION (INCLUDING WITHOUT LIMITATION A CRANE BOOM) CAN

REACH WITHIN 25 FEET OF ANY TRACK IS PROHIBITED UNLESS A FLAGMAN IS PRESENT AND

PROVIDING FLAGGING PROTECTION.

6. TEMPORARY WORK AREA EASEMENT (STOCKPILE) IS FOR CONSTRUCTION OF THE NEW GRADE

CROSSING AND STOCKPILING EXCAVATED MATERIAL ONLY. NO OTHER EARTHWORK IS

PERMITTED.

7. TEMPORARY WORK AREA EASEMENT (HAULING) IS FOR CONSTRUCTION TRAFFIC ONLY.

SURFACE ROADWAYS WITH AGGREGATE BASE, AS REQUIRED. NO OTHER EARTHWORK IS

PERMITTED.

8. TEMPORARY WORK AREA EASEMENT (STAGING) IS FOR STAGING ONLY. RESTORE TEMPORARY

WORK AREA EASEMENT (STAGING) TO PRE-EXISTING CONDITIONS FOLLOWING COMPLETION

OF WORK.

9. GRAND BOULEVARD AND ACCESS TO THE DON EDWARDS SAN FRANCISCO BAY NATIONAL

WILDLIFE REFUGE AND ITS ENVIRONMENTAL EDUCATION CENTER SHALL REMAIN OPEN FOR

DURATION OF WORK. THIS INCLUDES MAINTENANCE ACCESS FOR POND A16 AND POND A17

WHEN WORK IS NOT BEING PERFORMED EAST OF STATION 148+00.

10. DURING WORK HOURS WHEN THE DON EDWARDS SAN FRANCISCO BAY NATIONAL WILDLIFE

REFUGE GATES ARE CLOSED, OPERATE GATES SUCH THAT PUBLIC VEHICLES DO NOT ENTER

THE DON EDWARDS SAN FRANCISCO BAY NATIONAL WILDLIFE REFUGE. GATES ARE NORMALLY

OPEN FROM 8 AM TO 4 PM, MONDAY TO SATURDAY.

GEOMATICS:

1. HORIZONTAL POSITIONS REFERENCE CCS83, ZONE 0403 BASED ON NAD83(2011) IN US SURVEY

FEET. VERTICAL POSITIONS REFERENCE NAVD88 USING GEOID12B IN US SURVEY FEET.

2. TOPOGRAPHIC DATASET BY TOWILL AND ETRAC. LIDAR DATA COLLECTED BY TOWILL IN

NOVEMBER OF 2016. LASER SCANNING DATA OF UNION PACIFIC RAIL AND EMBANKMENT

COLLECTED BY ETRAC IN MAY OF 2018.

3. BATHYMETRIC DATASET BY ETRAC. MULTIBEAM SOUNDINGS COLLECTED IN FEBRUARY, APRIL, MAY, AND JUNE OF 2018. SINGLEBEAM SOUNDINGS COLLECTED IN APRIL OF 2018.

4. AERIAL IMAGERY COLLECTED BY TOWILL IN NOVEMBER OF 2016.

5. “Z” LINE IS SHOWN FOR REFERENCE. “Z” LINE IS IDENTICAL TO “L9” OF “REACH 1 ALIGNMENT

LINE”.

ENVIRONMENTAL:

1. HAULING ON PUBLIC ROADWAYS MAY ONLY OCCUR DURING REGULAR WORKING HOURS,

BETWEEN 7 AM TO 5:30 PM.

2. SOIL HAULING SHALL BE LIMITED TO 224 TRUCKS CYCLES PER DAY AS FOLLOWS:

BEFORE 9:00 AM THE CONTRACTOR SHALL LIMIT TRUCK CYCLES TO 11 OR FEWER. AFTER 3:00

PM THE CONTRACTOR SHALL LIMIT TRUCK CYCLES TO 11 OR FEWER. SOIL HAULING SHALL BE

LIMITED TO MAXIMUM 202 TRUCK CYCLES BETWEEN 9 AM AND 3 PM

3. TAKE APPROPRIATE MEASURES TO MINIMIZE IMPACTS TO MIGRATORY AND NESTING BIRDS.

REFERENCE ATTACHMENT 7 OF THE SOLICITATION.

4. TAKE APPROPRIATE MEASURES TO MINIMIZE IMPACTS TO THE SALT MARSH HARVEST MOUSE.

REFERENCE ATTACHMENT 7 OF THE SOLICITATION.

5. WORK IN ARTESIAN SLOUGH IS PROHIBITED FROM 1 DECEMBER TO 31 MAY. REFERENCE

ATTACHMENT 7 OF THE SOLICITATION.

DEWATERING:

1. INSTALL TEMPORARY STAFF GAGE IN POND A16 AND NEW CHICAGO MARSH PRIOR TO START

OF WORK.

2. PROVIDE SHEET PILE COFFERDAM IN ARTESIAN SLOUGH. SHEET PILE COFFERDAM SHALL

HAVE TOP OF WALL AT OR ABOVE TOP OF EXISTING EARTHEN EMBANKMENTS.

3. PROVIDE COFFERDAMS IN POND A16 AND NEW CHICAGO MARSH, AS REQUIRED. WATER

LEVELS IN POND A16 ARE MANAGED BELOW ELEVATION 5.0 FEET. WATER LEVELS IN NEW

CHICAGO MARSH ARE MANAGED BELOW ELEVATION 1.0 FEET.

4. EXCAVATE TEMPORARY DITCHES, AS REQUIRED, WITHIN LIMITS OF EXCAVATION.

5. DISCHARGE INTO NEW CHICAGO MARSH IS PROHIBITED.

6. REMOVE COFFERDAMS, AND RESTORE EXISTING GRADES BEYOND THE TOE OF THE LEVEE

AND / OR EMBANKMENT, AND / OR BERM PRIOR TO COMPLETION OF WORK.

GRADE CROSSING:

1. CONTACT UNION PACIFIC PRIOR TO USE OF THE EXISTING GRADE CROSSING AND / OR THE

NEW GRADE CROSSING. COORDINATE WITH UNION PACIFIC RAILROAD FOR USING GRADE

CROSSING BASED ON AGREEMENT (ATTACHMENT 13).

2. USE OF GRADE CROSSINGS IS PROHIBITED UNLESS A FLAGMAN IS PRESENT AND PROVIDING

FLAGGING PROTECTION. THE RELATED LINKS OF TIMETABLES AND TRAIN TRAFFIC DATA CAN

BE FOUND AT ATTACHMENT 13.A.

3. IF A TEMPORARY CROSSING IS BUILT, IT IS NOT THE CONTRACTOR'S RESPONSIBILITY TO

DISMANTLE THE TEMPORARY CROSSING AT THE CONCLUSION OF THE PROJECT.

LEVEES / EMBANKMENTS:

1. “BEGIN LEVEE” AND “END LEVEE” ARE IDENTIFIED FOR FUTURE DESIGN PURPOSES. LEVEES

AND EMBANKMENTS HAVE IDENTICAL CONSTRUCTION REQUIREMENTS. COMPLETE ALL

EARTHWORK WITH SELECT FILL UNLESS OTHERWISE NOTED.

2. “TOP OF EXISTING DIKE” IS TOP OF AN EXISTING EARTHEN EMBANKMENTS.

3. CLEAR, GRUB, AND STRIP PRIOR TO ALL EARTHWORK EXCEPT FOR THE NEW GRADE

CROSSING. CLEAR, GRUB, AND STRIP THE UNION PACIFIC MAINLINE TRACK EMBANKMENT AS

SELECT FILL IS PLACED.

4. USE LOW GROUND PRESSURE EQUIPMENT WITH GROUND PRESSURE LESS THAN 5 PSI WITHIN

18 INCHES OF BOTTOM OF EXCAVATION.

5. EXCAVATE TO BOTTOM OF EXCAVATION SHOWN UNLESS FINE-GRAINED ALLUVIUM, AS

VERIFIED BY THE CONTRACTING OFFICER, IS ENCOUNTERED AT SHALLOWER DEPTHS. IF

ORGANICS ARE ENCOUNTERED BELOW BOTTOM OF EXCAVATION SHOWN, IMMEDIATELY

NOTIFY THE CONTRACTING OFFICER.

6. GRADE BOTTOM OF EXCAVATION TO HAVE GRADUAL TRANSITIONS (10 PERCENT MAXIMUM).

7. BOTTOM OF EXCAVATION SHALL BE INSPECTED AND APPROVED BY THE CONTRACTING

OFFICER IN WRITING PRIOR TO PLACEMENT OF SELECT OF FILL.

8. SLOPE ALL EXCAVATIONS IN ACCORDANCE WITH EM 385-1-1 (1V:2H MAXIMUM). LIMITS OF

EXCAVATION SHOWN DRAWN WITH 1V:2H EXCAVATION SLOPE. EXCAVATION PERFORMED

BEYOND LIMITS OF EXCAVATION SHOWN IS CONSIDERED AN OVER-EXCAVATION. NO

SEPARATE PAYMENT WILL BE MADE FOR AN OVER-EXCAVATION OR FOR ADDITIONAL

EMBANKMENT MATERIALS NEEDED TO BACKFILL AN OVER-EXCAVATION.

9. WHERE LIMITS OF EXCAVATION EXTEND BEYOND THE TOE OF LEVEE AND / OR EMBANKMENT

AND / OR BERM, BACKFILL WITH SEMICOMPACTED FILL TO EXISTING GROUND.

10. DOCUMENT BOTTOM OF EXCAVATION AND LIMITS OF EXCAVATION ON AS-BUILT DRAWINGS.

11. STOCKPILE SATISFACTORY MATERIAL, MATERIAL CLASSIFIED AS SATISFACTORY WHICH

CONTAINS VISIBLE ORGANICS, MATERIAL CLASSIFIED AS GRAVEL OR ORGANIC SOIL, AND

STONE FROM ROCK SLOPE PROTECTION IN POND A12, WITHIN TEMPORARY WORK AREA

EASEMENT (STOCKPILE). STONE FROM ROCK SLOPE PROTECTION SHALL BE SEPARATELY

STOCKPILED. DISPOSE ALL OTHER MATERIAL.

12. COMPACT SELECT FILL USING INTELLIGENT COMPACTION UNLESS OTHERWISE APPROVED BY

THE CONTRACTING OFFICER. USE OF INTELLIGENT COMPACTION DOES NOT WAIVE THE

REQUIREMENT TO DETERMINE IN-PLACE DENSITY IN ACCORDANCE WITH ASTM D1556/D1556M

AND ASTM D6938.

RODENT CONTROL:

1. DISK SELECT FILL TO 6 INCHES AND RE-COMPACT WITH A MINIMUM OF 2 PASSES FROM A

TRACK-MOUNTED EQUIPMENT PRIOR TO PLACING CHAIN LINK FABRIC.

2. DO NOT OVERLAP CHAIN LINK FABRIC.

BERM:

1. CONSTRUCT BERM TO ELEVATION 7.0 IN POND A16, AND TO ELEVATION 3.5 IN NEW CHICAGO

MARSH. BERM COMPRISES TOP SOIL ABOVE ELEVATION 3.0 IN POND A16, COMPRISES TOP SOIL

ABOVE ELEVATION -0.5 IN NEW CHICAGO MARSH, AND COMPRISES SEMICOMPACTED FILL

ELSEWHERE. FLATTEN SLOPES IN NEW CHICAGO MARSH AS REQUIRED TO RESTORE EXISTING

GRADE.

REVEGETATION:

1. HYDROSEED ALL SLOPES. HYDROSEED FROM CREST TO DAILY HIGHER HIGH TIDES IN

ARTESIAN SLOUGH, TO ELEVATION 4.0 IN POND A16, AND TO ELEVATION 0.5 ELSEWHERE.

HYDROSEED A MINIMUM OF 5 FEET BEYOND LIMITS OF WORK.

2. HYDROSEED FOLLOWING COMPLETION OF LEVEE AND / OR EMBANKMENT CONSTRUCTION,

AND AGAIN DURING A SUBSEQUENT SEEDING WINDOW UNLESS THE SUBSEQUENT SEEDING

WINDOW OCCURS OUTSIDE THE PERIOD OF PERFORMANCE. THE SEEDING WINDOW IS FROM 1

SEPTEMBER TO 1 NOVEMBER.

3. IMMEDIATELY AFTER SEEDING, INSTALL EROSION CONTROL MATERIAL IN SEEDING AREA.

ROADWAYS:

1. REMOVE AND REPLACE EXISTING ASPHALT CONCRETE PAVEMENT ALONG EXISTING GRADE

CROSSING PRIOR TO USE, AND AGAIN FOLLOWING COMPLETION OF WORK. ASSUME 4,000

SQUARE FEET OF ASPHALT CONCRETE PAVEMENT REQUIRE REMOVAL AND REPLACEMENT

(2,000 SQUARE FEET FOR EACH OCCURRENCE), AND THAT THE ASPHALT CONCRETE

PAVEMENT COMPRISES 6 INCHES OF ASPHALT CONCRETE AND 12 INCHES OF AGGREGATE

BASE. WORK INCLUDES PAVEMENT MARKINGS.

2. CONSTRUCT ASPHALT CONCRETE PAVEMENT ALONG NEW GRADE CROSSING PRIOR TO USE,

AND REMOVE AND REPLACE ASPHALT CONCRETE PAVEMENT FOLLOWING COMPLETION OF

WORK. WORK INCLUDES PAVEMENT MARKINGS.

3. CONSTRUCT AGGREGATE BASE ROADWAY ALONG TOP OF LEVEE AND TOP OF EMBANKMENT

FOLLOWING COMPLETION OF WORK; OTHERWISE, REMOVE AND REPLACE AGGREGATE BASE

ROADWAY FOLLOWING COMPLETION OF WORK.

4. REMOVE AND REPLACE EXISTING ASPHALT CONCRETE ROADWAY NEAR ENTRANCE OF THE

DON EDWARDS SAN FRANCISCO BAY NATIONAL WILDLIFE REFUGE ENVIRONMENTAL

EDUCATION CENTER FOLLOWING COMPLETION OF WORK. ASSUME 10,000 SQUARE FEET OF

ASPHALT CONCRETE PAVEMENT REQUIRE REMOVAL AND REPLACEMENT, AND THAT THE

ASPHALT CONCRETE PAVEMENT COMPRISES 6 INCHES OF ASPHALT CONCRETE AND 12

INCHES OF AGGREGATE BASE. WORK INCLUDES PAVEMENT MARKINGS.

WATER CONTROL STRUCTURE:

1. CONSTRUCT TEMPORARY SIPHON AT STATION 108+50, BETWEEN TWO HISTORICAL SLOUGHS.

ASSUME 500 LINEAR FEET OF PIPE IS REQUIRED. SUPPLY WATER FROM POND A16 TO NEW

CHICAGO MARSH, FROM WHEN THE EXISTING SIPHON STRUCTURE IS TAKEN OUT OF SERVICE

TO WHEN THE NEW WATER CONTROL STRUCTURE IS OPERATIONAL.

2. CONSTRUCT WATER CONTROL STRUCTURE A MINIMUM OF THREE MONTHS AFTER

COMPLETION OF LEVEE CONSTRUCTION.

MISCELLANEOUS:

1. PROVIDE PLAINWELL BENCH (72 INCH BENCH WITH CENTER ARM AND ALUMINUM SEAT) OR

APPROVED EQUAL. INSTALL BENCH ON A CONCRETE PAD (3 LOCATIONS) OR ON THE NEW

PEDESTRIAN BOARDWALK (1 LOCATION) IN ACCORDANCE WITH MANUFACTURER’S

RECOMMENDATIONS.

QUANTITIES:

THE ENGINEER ESTIMATES THE FOLLOWING CLEAN LINE EARTH VOLUMES FOR CONTRACT LINE

ITEM NUMBER 0006. THESE QUANTITIES DO NOT REFLECT ALL WORK REQUIRED TO COMPLETE

CONTRACT LINE ITEM NUMBER 0006. UNLESS OTHERWISE NOTED, ALL EMBANKMENT AND BACKFILL

MATERIALS SHALL BE CONTRACTOR-FURNISHED.

1. EXCAVATION MATERIAL FOR STOCKPILE: 223,000 CY

2. EXCAVATION MATERIAL FOR SEMICOMPACTED FILL: 17,000 CY

3. EXCAVATION MATERIAL FOR DISPOSAL: 20 CY

4. SELECT FILL: 343,000 CY

5. TOP SOIL: 14,000 CY

EXCAVATION MATERIAL FOR DISPOSAL DOES NOT INCLUDE MATERIAL FROM DEMOLITION OF THE

EXISTING SIPHON AND THE EXISTING BOARDWALK, NOR FROM CLEARING, GRUBBING, AND

STRIPPING. QUANTITIES FOR DEMOLITION OF THE EXISTING SIPHON AND THE EXISTING

BOARDWALK, AND FROM CLEARING, GRUBBING, AND STRIPPING ARE NOT EXPLICITLY DEFINED.

THE CONTRACTOR SHALL VERIFY QUANTITIES DURING BID DEVELOPMENT BASED ON THE BID

DRAWINGS. THE CONTRACTOR SHALL BASE THEIR BID ON THEIR OWN ESTIMATED QUANTITIES. THE

CONTRACTOR SHALL IMMEDIATELY NOTIFY THE CONTRACTING OFFICER OF DISCREPANCIES

BETWEEN THEIR OWN AND THE ENGINEER’S ESTIMATED QUANTITIES.