W912P721B0002 0004.pdf

Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended, by one of the following methods:

(a) By completing items 8 and 15, and returning or (c) By separate letter or electronic communication which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE

RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by letter or electronic communication, provided each letter or electronic communication makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

E. IMPORTANT: Contractor is not is required to sign this document and return copies to the issuing office.

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

1. CONTRACT ID CODE

2. AMENDMENT/MODIFICATION NUMBER 3. EFFECTIVE DATE 4. REQUISITION/PURCHASE REQUISITION NUMBER 5. PROJECT NUMBER (If applicable)

7. ADMINISTERED BY (If other than Item 6) CODE

STANDARD FORM 30 (REV. 11/2016)

Prescribed by GSA FAR (48 CFR) 53.243

FACILITY CODE

9A. AMENDMENT OF SOLICITATION NUMBER

9B. DATED (SEE ITEM 11)

10A. MODIFICATION OF CONTRACT/ORDER NUMBER

10B. DATED (SEE ITEM 13)

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers is extended. is not extended.

12. ACCOUNTING AND APPROPRIATION DATA (If required) copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NUMBER AS DESCRIBED IN ITEM 14.

CHECK ONE A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE CONTRACT ORDER

NUMBER IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation data, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15C. DATE SIGNED

15A. NAME AND TITLE OF SIGNER (Type or print)

16C. DATE SIGNED

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

PAGE OF PAGES

6. ISSUED BY CODE

8. NAME AND ADDRESS OF CONTRACTOR (Number, street, county, State and ZIP Code) (X)

CODE

15B. CONTRACTOR/OFFEROR

(Signature of person authorized to sign)

16B. UNITED STATES OF AMERICA

(Signature of Contracting Officer)

Previous edition unusable

Oakland Inner and Outer Harbor FY21 Maintenance Dredging Project

See Continuation page of SF-30 Summary of changes for Amendment 0004

CONTRACTING DIVISION

450 GOLDEN GATE AVE., 4TH FLOOR

SAN FRANCISCO, CA 94102

See Item 6

W912P721B0002

W912P721B0002

04/07/2021

03/05/2021

1 13

X

Continuation page 2(A) of SF 30 – Summary of changes for Amendment 0004

This amendment makes changes to the solicitation; these changes represent one of three types, either adding new information, deleting information, or revising existing information. Changes made by this amendment replace the previously issued sections of the advertisement, as referenced in the below summary of change

1442- See Attached

(1) Period of Performance – changed to 213days

(2) Description of Work – changed 2 ft paid overdepth to 1.5 ft overdepth in the first sentence

PRICE SCHEDULE

Price Schedule -See attached

(1) Revised Bid Schedule-1 Paid Over-depth changed from 2ft to 1.5ft (see attached bid schedule) – quantity stays the same as amended with amendment 1

PLANS

Sheet G-02-see attached

(1) Plan sheet G-02 – channel profile adjusted to reflect the change in the allowable paid and unpaid over-depth

SECTION 35 020 23

Section 35 20 23 – see attached

(1) Paragraph 1.4.1.4 – Allowable (Paid) Overdepth Prism – First sentence changed 2ft to 1.5ft and last sentence removed.

(2) Paragraph 1.4.1.5 Allowable (Unpaid) Overdepth Prism – description added.

WAGE DETERMINATION

(1) Revised Wage Determination CA202100018 04/02/2021-Attachment

W912P721B0002 0004

PROJECT DESCRIPTION: The w ork includes annual maintenance dredging (using contour dredging) of the Oakland Inner and Outer harbor to -50-ft (MLLW) plus 1.5-ft of paid over-depth and transporting of the dredged material per the requirements in specif ication Section 01 11 00 SUMMARY OF WORK. Excluding Reach 10A, the material from Reaches 1 through 10B is suitable f or disposal at a Contractor-furnished upland site as cover. The material from Reach 10A is suitable for disposal at a Contractor-furnished upland site as foundation. Dredged material from Reach 1 through10B is also suitable for disposal at Government furnished ocean disposal s This requirement is for full and open competition. It w ill be issued as an Invitation f or Bid (IFB) w hich w ill result in the aw ard of a single Firm Fixed Price (FFP) contract.

The North American Industry Classif ication System (NAICS) Code applicable to this acquisition is 237990.

ESTIMATED COST RANGE IS BETWEEN $10,000,000 AND $25,000,000.

See FAR Clause 52.236-27 SITE VISIT (CONSTRUCTION) (FEB 1995)

BIDDER QUESTIONS

Questions relating to this solicitation and technical inquiries w ill be submitted via email to the assigned contract specialist. Inquiries must be received no later than 14 calendar days prior to the date set for bid opening.

X

KAREN S SMITH 415-503-6989

NOTE: In sealed bid solicitations "offer" and "offeror" mean "bid" and "bidder".

10. THE GOVERNMENT REQUIRES PERFORMANCE OF THE WORK DESCRIBED IN THESE DOCUMENTS

NEGOTIATED

05-Mar-2021

(RFP)

(IFB)

CALL:

B. TELEPHONE NO. (Include area code) (NO COLLECT CALLS)

See Item 7

2. TYPE OF SOLICITATION

SEALED BID

3. DATE ISSUED

9. FOR INFORMATION A. NAME

SOLICITATION

NSN 7540-01-155-3212 1442-101 STANDARD FORM 1442 (REV. 4-85)

Prescribed by GSA FAR (48 CFR) 53.236-1(e)

11. The Contractor shall begin performance w ithin _______1 calendar days and complete it w ithin ________213 calendar days after receiving aw ard, X notice to proceed. This performance period is X mandatory, negotiable. (See _________________________52.211-10

12 A. THE CONTRACTOR MUST FURNISH ANY REQUIRED PERFORMANCE AND PAYMENT BONDS?

(If "YES," indicate within how many calendar days after award in Item 12B.)

X YES NO

13. ADDITIONAL SOLICITATION REQUIREMENTS:

A. Sealed offers in original and __________1 copies to perform the w ork required are due at the place specif ied in Item 8 by ___________ local time ______________15 Apr 2021 (date). If this is a sealed bid solicitation, offers must be publicly opened at that time.

shall be marked to show the offeror's name and address, the solicitation number, and the date and time offers are due.

B. An offer guarantee is, X is not required.

C. All offers are subject to the (1) w ork requirements, and (2) other provisions and clauses incorporated in the solicitation in full text or by reference.

D. Offers providing less than _______60 calendar days for Government acceptance after the date offers are due w ill not be considered and w ill be rejected.

SOLICITATION, OFFER,

AND AWARD

(Construction, Alteration, or Repair)

1. SOLICITATION NO.

IMPORTANT - The "offer" section on the reverse must be fully completed by offeror.

4. CONTRACT NO.

7. ISSUED BY CODE

CONTRACTING DIVISION

450 GOLDEN GATE AVE, 4TH FL, STE 0134

SAN FRANCISCO CA 94102-3406

W912P7

PAGE OF PAGES

1 OF

CODE

(Title, identifying no., date):

12B. CALENDAR DAYS

02:00 PM (hour) Sealed envelopes containing offers

5. REQUISITION/PURCHASE REQUEST NO. 6. PROJECT NO.

8. ADDRESS OFFER TO (If Other Than Item 7)

FAX:TEL: TEL: FAX:

W912P721B0002 53

Contract Line Item No.(CLIN) Description of Supplies and Services *Quantity Unit

Unit Price ($) Amount($)

0001 Mobilization and Demobilization 1 Job

0002 Dredging Reach 1 to -50-ft MLLW including 2 1.5-foot of paid Over-depth 293,600 CY

208,300 CY

0003 Dredging Reach 2 to -50-ft MLLW including 2 1.5-foot of paid Over-depth 179,000 CY

136,700 CY

0004 Dredging Reaches 3 and 4 to -50-ft MLLW including 2 1.5-foot of paid Over-depth 180,100 CY

123,500 CY

0005 Dredging Reaches 5 and 6 to -50-ft MLLW including 2 1.5-foot of paid Over-depth 74,200 CY

96,100 CY

0006 Dredging Reach 7 to -50-ft MLLW including 2 1.5-foot of paid Over-depth 125,600 CY

180,700 CY

0007 Dredging Reach 8 to -50-ft MLLW including 2 1.5-foot of paid Over-depth 106,600 CY

91,500 CY

0008 Dredging Reaches 9 and 10B to -50-ft MLLW including 2 1.5-foot of paid Over-depth 103,200 CY

104,400 CY

0009 Dredging Reach 10A to -50-ft MLLW including 2 1.5-foot of paid Over-depth 67,000 CY

37,000 CY

Total (Item 0001 and 0009)

Total (Item 0001 and 0009)

Notes:

1 .

978,200 CY + 1 Job

* - ALL QUANTITIES ARE ESTIMATES. SEE FAR 52.211-18, SECTION 00 72 00 (GENERAL

CONDITION) OF THE CONTRACT.

To be considered responsive, prices must be submitted on all individual items within Pricing Schedule. Failure to do so may be cause for rejection of bids.

1,129,300 CY + 1 Job

SECTION 00 10 00

PRICING SCHEDULE

OAKLAND INNER AND OUTER HARBOR FY21 MAINTENANCE DREDGING

2 .

3 .

4 .

5 .

6 .

7 .

End of Document

The Contractor shall furnish all plant, labor, material, equipment, etc., necessary to perform all work in strict accordance with the terms and conditions set forth in the contract to include all attachments thereto.

Dredge material placement shall meet the requirements in specification Section

01 11 00 SUMMARY OF WORK.

Bidders must complete and submit attached “Dredging Plant and Equipment Schedule”, forms Page 1 and Page 2 as part of their solicitation package for bid evaluation. Failure to do so may cause the bid to be considered nonresponsive. The Contractor shall demonstrate that all necessary equipment will be available and committed to this contract.

The term "Job", which appears on the Pricing Schedule (Section 00 01 00) under “Unit” for Bid Item No. 0001 shall be considered as a Lump Sum. The Variation in Estimated Quantities contract clause, FAR 52.211-18, shall not apply to Bid Item No. 0001.

BASIS of AWARD: The contract will be awarded in accordance with FAR 52.214-19 Contract Award – Sealed Bidding – Construction.

The Government reserves the right to direct the Contractor to place dredged material at an environmentally acceptable alternate disposal site in accordance with the Change Clause FAR 52.243-4.

ACCEPTANCE REACHES:

INNER HARBOR

REACH 1: STA 0+00 - STA 64+00

REACH 2: STA 64+00 - STA 110+00

REACH 3: STA 110+00 - STA 175+00

REACH 4: STA 175+00 - STA 205+00

REACH 5: STA 205+00 - STA 230+00

REACH 6: STA 230+00 - STA 244+35

OUTER HARBOR

REACH 7: STA 0+00 - STA 56+00

REACH 8: STA 56+00 - STA 80+00

REACH 9: STA 80+00 - STA 96+00

REACH 10A: STA 96+00 - STA 111+00

REACH 10B: STA 111+00 - STA 133+49

HORIZONTAL DATUM: NAD83 (2011) 2010.00 EPOCH

VERTICAL DATUM: MLLW

SURVEY CONTROL:

941 4777 OAKLAND MIDDLE HARBOR, PIER 40 CA REACHES 1-4 AND 7-10

BENCHMARK 941 4777 A TIDAL

PID: AH7158

MLLW: 4.146M - PUBLISHED 4/21/2003

BENCHMARK 941 4777 B TIDAL

PID: AE 5211

NAD 83 (2011): -28.319M - OPUS 3/13/2020, 2010.0 EPOCH

9414764, OAKLAND INNER HARBOR CA

REACHES 4-6

BENCHMARK: PORT 1

PID: HT0654

MLLW: 2.900M - PUBLISHED 6/30/2014, 1983-2001 EPOCH NAD 83 (2011): -29.523M

OPUS 3/13/2020, 2010 EPOCH

EL. 0.00 FEET MLLW

1.5' ALLOWABLE (PAID) OVERDEPTH

PROJECT DEPTH

NOTE:

SEE SPECIFICATION SECTION 35 20 23 (DREDGING) FOR DETAILS.

SHEET SHEET

NUMBER ID DESCRIPTION

01 G-01 COVERSHEET

02 G-02 SCHEDULE OF DRAWINGS, DISPOSAL SITE,

GENERAL NOTES, AND TYPICAL DREDGING SECTION

03 G-03 KEYPLAN AND CHANNEL CONTROL POINT TABLES

04 C-01 INNER HARBOR DREDGING PLAN

STA 0+00 - STA 19+50

05 C-02 INNER HARBOR DREDGING PLAN

STA 19+50 - STA 77+50

06 C-03 INNER HARBOR DREDGING PLAN

STA 77+50 - STA 133+50

07 C-04 INNER HARBOR DREDGING PLAN

STA 133+50 - STA 190+50

08 C-05 INNER HARBOR DREDGING PLAN

STA 190+50 - STA 244+35

09 C-06 OUTER HARBOR DREDGING PLAN

STA 0+00 - STA 52+50

10 C-07 OUTER HARBOR DREDGING PLAN

STA 52+50 - STA 109+50

11 C-08 OUTER HARBOR DREDGING PLAN

STA 109+50 - STA 133+49

12 C-09 BART TUBE PLAN AND PROFILE

SCHEDULE OF DRAWINGS

TYPICAL DREDGING SECTION

NOT TO SCALE

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

GENERAL NOTES:

1. BATHYMETRIC SURVEYS COMPLETED BY THE U.S ARMY CORPS OF ENGINEERS,

SAN FRANCISCO DISTRICT, ON 12 MAY 2020 FOR OAKLAND INNER HARBOR AND 11

MAY 2020 FOR OAKLAND OUTER HARBOR.

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 FOR 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. COORDINATES ARE BASED ON THE CALIFORNIA STATE PLANE COORDINATE

SYSTEM OF 1983 (CCS83), LAMBERT CONFORMAL PROJECTION ZONE III, AS

DESCRIBED IN SPECIAL PUBLICATION NO. 253, PUBLISHED BY NATIONAL OCEAN

SURVEY.

7. THE PROJECT DEPTH IS -50 FT MLLW. THE DISPOSAL SITES ARE A CONTRACTOR

FURNISHED UPLAND SITE AND A GOVERNMENT-FURNISHED DEEP OCEAN

DISPOSAL SITE (SF-DODS). SEE SECTION 00 10 00 PRICING SCHEDULE AND

SECTION 35 20 24 AQUATIC DISPOSAL FOR SITE DETAILS.

7. 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.

8. THE LOCATION OF ALL NAVIGATION AIDS ARE BASED ON INFORMATION PROVIDED

BY THE U.S. COAST GUARD. BUOY LOCATION REPRESENTS THE POSITION OF THE

SINKER ONLY.

9. SEDIMENT SAMPLING AND TESTING DATA AVAILABLE UPON REQUEST.

ABBREVIATIONS:

MLLW MEAN LOW LOWER WATER

S a n

F r a n c i s c o

B a y

SF-DODS DISPOSAL SITE

NOT TO SCALE

0 10 20km

Monterey Bay National

Marine Sanctuary

Pigeon Pt.

Half Moon

Bay

Gulf of The Farrallones

National Marine Sanctuary

37°30'

37°45'

38°00'

123°45' 123°30' 123°15' 123°00' 122°45' 122°30'

37°15'

37°00'

Farallon

Islands

EPA SECTION 102

OCEAN DISPOSAL SITE

SF-DODS

CENTER COORDINATES OF

OVAL SHAPED SITE:

37°39.0'N

123°29.0'W

4 NAUTICAL MILES(NM) LONG

(NORTH / SOUTH) AXIS

2.5 NAUTICAL MILES SHORT

(EAST / WEST) AXIS

M A

R K

SHEET ID

US Army Corps of Engineers

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C:\Users\L3ET9FS9\Desktop\E-Documents\O&M\Oakland\Oakland2021_Inner&Outer\Plans\CAD\ Oakland_O&M G-01 - G-02.dwg 06 Apr 2021 - 10:08am

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2' ALLOWABLE OVERDEPTH

(PAID AND NON-PAID)

0.5' ALLOWABLE OVERDEPTH (NON-PAID)

Oakland Inner and Outer Harbor FY21 Maintenance Dredging W912P721B0002

SECTION 35 20 23

DREDGING

04/06

PART 1 GENERAL

1.1 DEFINITION

Dredging work is defined as the removal of bottom sediments including;

clay, silt, sand, and gravel from streams, rivers, lakes, coastal waters, oceans, and transporting the resulting material by barges, ships, or pipelines to a designated placement site on land or in water. Dredge material types can be soft or hard. Hard material is defined as material requiring the use of special equipment for economical removal, and includes boulders or fragments too large to be removed in one piece by the dredge. Annual O&M maintenance dredging work has a known material that is not hard for dredging.

1.2 SUBMITTALS

Government approval is required for submittals with a "G" designation:

submittals not having a "G" designation are for information only. Submit the following in accordance with Section SUBMITTAL PROCEDURES 01 33 00:

SD-02 Shop Drawings

Soundings or Sweepings; G, 35 20 23-3.3.1

Submit drawings of surveys during progress of work by soundings or sweepings

1.3 MATERIAL TO BE REMOVED

The type of material to be removed from this project is mainly clay, silt, gravel and/or sand.

1.3.1 Scow Monitoring

The contractor shall comply with the Dredge Data Logging System. The purpose of complying with two different and independent scow monitoring programs is to fulfill obligations from two different and independent government quality assurance agencies.

1.3.1.1 Dredge Data Logging System (DDLS)

Submit the DDLS, the DDLS back-up system, and the qualifications of the DDLSQC firm to the Contracting Officer or delegated representative for approval, as specified in Attachment 1 at the end of the Specification package.

Methods used for the dredge positioning shall also be used to display and record the disposal vessel's location at 1-minute time intervals throughout the loading, transport and disposal cycle of each disposal vessel. The Dredge Data Logging System (DDLS) data shall be received onboard the actual disposal vessel. Position data shall be annotated for

SECTION 35 20 23 Page 1 April 06, 2021 the time actual dumping is in progress. A copy record of the DDLS position data, correlated with time and annotated with date, shall be submitted to the Contracting Officer or delegated representative as part of the daily Quality Control Report. The Contracting Officer or delegated representative shall have access to the monitoring equipment in order to observe its operation during disposal operations. Dredge inspectors shall be provided with hand-held GPS equipment to verify dredge disposal in SF-DODS.

1.3.1.2 Dredge Material Disposal Site Log (DMDSL)

Submit a DMDSL on a weekly basis by noon Monday that enumerates work accomplished during the preceding week. The DMDSL logs to be submitted shall include the reach from where the material came from. Every Monday, the Contractor shall e-mail the prior week's DMDSL data to the government.

Include the Corps permit number and dredge episode number. Maintain a DMDSL using the "Dredge Material Disposal Site Log" form in Attachment 2 at the end of the Specification package. DMDSL shall be included as an attachment to QC Daily Reports.

1.3.1.3 DDLS Report/Data

Submit electronic copies of the DDLS positional data for all dredge equipment and all disposal/fill vessels utilized; and dredged quantity, sediment type and GPS positional data on the dredge and disposal or fill locations for all scows and barges by email to the government. This electronic data shall be included in the daily CQC Report submitted in RMS.

1.4 MEASUREMENT AND PAYMENT

1.4.1 Method of Measurement

The contractor shall furnish all BD and AD surveys. The material removed will be measured by cubic yard in place (in-situ). The drawings represent existing conditions based on current available information, but will be verified and corrected, if necessary, by soundings taken before dredging in each locality. Results of soundings will be the basis for payment.

1.4.1.1 Before-Dredge Survey

The Before Dredge (BD) Survey is the hydrographic survey that is performed prior to the start of dredging for the purposes of payment in accordance with Section HYDROGRAPHIC SURVEY 01 32 23.

1.4.1.2 After-Dredge Survey

The After Dredge (AD) Survey is the hydrographic survey that is performed after the dredging is completed for the purposes of acceptance and payment in accordance with Section HYDROGRAPHIC SURVEY 01 32 23.

1.4.1.3 Required Dredge Prism

The Required Dredging Prism is defined by the material above the project depth and in between the channel toes. The total quantity of material required to be dredged will be the material available in the Required Dredging Prism and using contour dredging per the "Typical Dredging Section" shown in the drawings.

SECTION 35 20 23 Page 2 April 06, 2021

1.4.1.4 Allowable (Paid) Overdepth Prism

The depth of the Allowable Overdepth (Paid) Prism is defined by the material below project depth and above the 21.5 -foot Allowable (Paid) Overdepth. The width of the Allowable Overdepth (Paid) Prism is defined by the channel width between the channel toes. Dredging within the Allowable (Paid) Overdepth Prism is authorized but not required. Dredging in excess of the allowable 2-foot paid overdepth is prohibited .

1.4.1.5 Allowable (Unpaid) Overdepth Prism

The depth of the Allowable (Unpaid) Overdepth Prism is defined by the material below the 1.5-foot Allowable (Paid) Overdepth and above the 2-foot Allowable Overdepth (Paid plus Unpaid). The width of the Allowable Overdepth (Unpaid) Prism is defined by the channel width between the channel toes. Dredging in this Prism is authorized but not required.

Dredging in excess of the allowable 2-foot overdepth is prohibited.

1.4.2 Side Slope Prism

The Side Slope Prism is the area outside of the channel toes. Dredging on the side slope is prohibited. Material that sloughs from the side slope into the channel and is removed will be paid as evidenced by the Before-and After-Dredge surveys.

1.4.3 Progress Payment Quantity

The material quantity for progress payments will be ninety percent (90%) of the payable quantity calculated using the Contractor's payment survey and the Before-Dredge survey, less any previously paid quantities.

1.4.4 Final Payment Quantities

The final payment quantities for each reach will be 100% of the payable quantity calculated from the Before-Dredge and After-Dredge surveys, less any prevailing paid quantities using the TIN to TIN method in EM 1110-2-1003. The contractor survey shall be used unless there is evidence of collusion, fraud, or obvious error documented.

1.5 PERMIT

All work shall be performed in accordance with the conditions and requirements included in the state and federal permits applicable to this project. Copies of the 2020-2024 San Francisco Bay Regional Water Quality Control Board Waste Discharge Requirements and the 2020-2024 Consistency Determination and Consistency Notification will be made available upon request.

1.6 BASIS FOR BIDS

Payment will be at the contract unit price per cubic yard, multiplied by total cubic yards of acceptable dredging. Base bids on total cubic yards of dredging. Include a bid unit price per cubic yard of dredging based on the quantity as specified or indicated. If the Contracting Officer or delegated representative requires an increase or a decrease in total volume of dredging, the contract price will be adjusted. Dredging

SECTION 35 20 23 Page 3 April 06, 2021 conditions specified and indicated describe conditions which are known.

However, the Contractor is responsible for other conditions encountered which are not unusual when compared to conditions recognized in the dredging business as usual in dredging activities such as those required under this contract.

PART 2 PRODUCTS

Not used.

PART 3 EXECUTION

3.1 INSPECTION

Inspect the work, keep records of work performed, and ensure that gages, targets, ranges, and other markers are in place and usable for the intended purpose. Furnish, at the request of the Contracting Officer or delegated representative, boats, boatmen, laborers, and materials necessary for inspecting, supervising, and surveying the work. When required, provide transportation for the Contracting Officer or delegated representative and inspectors to and from the disposal area and between the dredging plant and adjacent points on shore.

3.1.1 Government QAR Accommodations

The Contractor shall provide, upon request of the Government QA Representative (GQAR), suitable transportation from all points on shore designated by the GQAR to and from the various pieces of plant, and to and from the dredging and disposal areas. Transportation will be made available during all shift changes, when requested by GQAR. Contractor should anticipate at least two round trips per 24-hour period. Contractor shall provide GQAR access to a desk, or other suitable workspace including electrical outlet, while on-board the dredge plant. Should the Contractor refuse, neglect, or delay compliance with these requirements, the specific transportation facilities may be furnished and maintained by the Contracting Officer or delegated representative, and the cost thereof will be deducted from any amounts due, or to become due the Contractor.

3.2 CONDUCT OF DREDGING WORK

3.2.1 Order of Work

The Contracting Officer or delegated representative will direct the Contractor on the order of work. The Government reserves the right to change the order of work at any time.

3.2.2 Interference with Navigation

Minimize interference of channels and passages. The Contracting Officer or delegated representative will direct the shifting or moving of dredges or the interruption of dredging operations to accommodate the movement of vessels and floating equipment, if necessary.

3.2.2.1 Coast Guard Notification

The Contractor shall submit copies of written Coast Guard notifications

SECTION 35 20 23 Page 4 April 06, 2021 prior to conducting dredging activities. Utilize the Dredging Plan to forecast the activities in the channels and notify the United States Coast Guard Marine Safety Office in writing with a copy to the Contracting Office Representative. All Coast Guard notifications shall be provided in accordance with Section GOVERNMENT SAFETY REQUIREMENTS (DREDGING) 01 35 26-

3.10.3 U.S. Coast Guard Notification and 3.12 Marine Transportation Safety. When utilizing the Government-furnished open water disposal area, notify the U.S. Coast Guard in accordance with Section AQUATIC DISPOSAL 35 20 24-3.6.6 Notification. All dredge plants must be equipped with an Automatic Identification System (AIS) transponder that is compatible with Coast Guard specifications identified in Section GOVERNMENT SAFETY REQUIREMENTS (DREDGING) 01 35 26-3.12.2 Vessel Traffic Services (VTS) Reporting Requirements.

3.2.3 Lights

Each night, between sunset and sunrise and during periods of restricted visibility, provide lights for floating plants, pipelines, ranges, and markers. Also, provide lights for buoys that could endanger or obstruct navigation. When night work is in progress, maintain lights from sunset to sunrise for the observation of dredging operations. Lighting shall conform to United States Coast Guard requirements for visibility and color.

3.2.4 Ranges, Gages, and Lines

Furnish, set, and maintain ranges, buoys, and markers needed to define the work and to facilitate inspection. Establish and maintain gages in locations observable from each part of the work so that the depth may be determined. Suspend dredging when the gages or ranges cannot be seen or followed. The Contracting Officer or delegated representative will furnish, upon request by the Contractor, survey lines, points, and elevations necessary for the setting of ranges, gages, and buoys.

3.2.5 Plant

Maintain the plant, scows, coamings, barges, pipelines, and associated equipment to meet the requirements of the work. Promptly repair leaks or breaks along pipelines. Remove dredged material placed due to leaks and breaks.

3.2.6 Disposal of Excavated Material

Provide for safe transportation and disposal of dredged materials.

Transport and dispose of dredged material at Government furnished deep ocean disposal site SF-DODS, or at the Contractor-furnished beneficial use upland site, unless otherwise directed by the Contracting Officer or delegated representative. The deposit of dredged materials in unauthorized places is forbidden. Comply with rules and regulations of local port and harbor governing authorities.

3.2.6.1 Method of Disposal

Deposit dredged material at the Government-furnished deep ocean disposal site SF-DODS using self-dumping scows or barge, or deposit dredge material at Contractor-furnished beneficial use upland placement site by scow or barge, and using an appropriate method to unload scow/barge to place material within the upland site.

SECTION 35 20 23 Page 5 April 06, 2021

3.2.6.2 Disposal in Indicated Fill Areas

In depositing excavated material for fill, uniformly grade and allow for shrinkage. Provide and maintain necessary bulkheads, dikes, ditches, weirs, spillways, and other construction necessary to confine and retain the fill in the dredge fill area.

3.2.6.3 Submerged Pipeline

If a leak occurs in the discharge pipeline, immediately discontinue using the line until leaks are repaired. Remove material placed due to leaks or breaks.

3.2.6.4 Overflow/Decant, Spillage and Leakage

Overflow/decant, spillage and leakage is prohibited during transportation to the disposal site. Overflow/decanting at the dredge site will be controlled in accordance with the requirements in Section TEMPORARY

ENVIRONMENTAL CONTROLS FOR DREDGING IN SAN FRANCISCO BAY 01 57 19.01 43.

3.2.6.5 Barring and Knock-Down Dredging

Barring, dragging and all other methods of bed leveling are prohibited.

3.2.6.6 Prohibition on Trash and Debris; use of Grizzly

Only dredged material determined in advance by EPA and USACE to be suitable for ocean disposal may be discharged at SF-DODS.

Uncharacterized dredged material, vessels, trash, and other debris are prohibited from being discharged at the site. In order to exclude large trash and debris (including rocks) from being disposed at the site, before transport to SF- DODS all dredged material must be placed into scows through a steel mesh or chain "grizzly" with openings of no more than 12 inches by 12 inches. Material retained on the grizzly must be removed and disposed of separately. EPA and USACE may on a case-by-case basis waive the requirement to use a grizzly if they determine that trash and debris is unlikely to be present in the area to be dredged.

3.2.7 Navigation Warnings

Furnish and maintain navigation warning signs along the pipeline.

3.2.8 Method of Communication

Provide a system of communication between the dredge crew and the crew at the disposal area. A portable two-way radio is acceptable.

3.2.9 Safety of Structures

The execution of work shall ensure the stability of piers, bulkheads, and other structures lying on or adjacent to the site of the work, insofar as structures may be jeopardized by dredging operations. Repair damage resulting from dredging operations, insofar as such damage may be caused by variation in locations or depth of dredging, or both, from that indicated or permitted under the contract.

3.2.10 Plant Removal

Upon completion of the work, promptly remove plant, including ranges, SECTION 35 20 23 Page 6 April 06, 2021 buoys, piles, and other markers or obstructions.

3.3 ACCEPTANCE

The Contractor shall take soundings before and after dredging in accordance with Section HYDROGRAPHIC SURVEY 01 32 23. The Government will perform Quality Assurance of the soundings.

3.3.1 Final Examination and Area Completion

The Government will be notified when soundings or sweepings are to be made and the Government will be permitted to accompany the sounding or sweeping party and to inspect the data and methods used in preparing the final estimate. The Government will review the Contractor's survey data for completion. Final estimates will be subject to deductions or correction of deductions previously made because of excessive overdepth, dredging outside or authorized areas, or disposal of material in an unauthorized manner.

3.3.2 Area Acceptance

Any shoals, lumps, or other lack of required contract depth disclosed by the After-Dredge survey shall be removed by dredging the channel bottom at the contract rate for dredging. No shoals or lumps above contract depth, as evidenced by multi-beam sounding will be accepted. Completion will be in writing from the Government Representative based on the After-Dredge multi-beam survey plan.

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SECTION 35 20 23 Page 7 April 06, 2021