Amend-0001_W912HY19B0027.pdf

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

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.

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

30-105-04EXCEPTION TO SF 30

APPROVED BY OIRM 11-84

STANDARD FORM 30 (Rev. 10-83) Prescribed by GSA

FAR (48 CFR) 53.243

See continuation sheet for list of changes to specs and plans.

1. CONTRACT ID CODE PAGE OF PAGES

J 1 39

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

16C. DATE SIGNED

BY

16B. UNITED STATES OF AMERICA15C. DATE SIGNED15B. CONTRACTOR/OFFEROR

(Signature of Contracting Officer)(Signature of person authorized to sign)

8. NAME AND ADDRESS OF CONTRACTOR (No., Street , County, State and Zip Code) X W912HY19B0027

X 9B. DATED (SEE ITEM 11)

25-Jul-2019

10B. DATED (SEE ITEM 13)

9A. AMENDMENT OF SOLICITATION NO.

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

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

Offer 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 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

or (c) By separate letter or telegram 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 telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

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

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

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

CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, 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)

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

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

10A. MOD. OF CONTRACT/ORDER NO.

2. AMENDMENT/MODIFICATION NO.

P0001

5. PROJECT NO.(If applicable)

6. ISSUED BY

3. EFFECTIVE DATE

14-Aug-2019

CODE

US ARMY CORPS OF ENGINEERS

2000 POINT FORT ROAD

P.O. BOX 1229

GALVESTON TX 77553-1229

W912HY 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W912HY19B0027

A0001-2

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

1. THE SPECIFICATIONS FOR SOLICITATION NO. W912HY19B0027, BRAZOS ISLAND

HARBOR CHANNEL, TEXAS, JETTY CHANNEL AND BEACH NOURISHMENT IN

CAMERON COUNTY, TEXAS, DREDGING, ARE HEREBY AMENDED AS FOLLOWS:

a) Specifications.

(1) SF-1442, SOLICITATION, OFFER, AND AWARD – Note the following change in block 7, “Issued By:”

(a) CHANGE FROM:

US ARMY CORPS OF ENGINEERS

2000 FORT POINT ROAD

P.O. BOX 1229

GALVESTON TX 77553-1229

(b) CHANGE TO:

USAED, GALVESTON

CONTRACTING DIVISION

2000 FORT POINT ROAD

GALVESTON TX 77553-1229

(2) SECTION 00 11 00.00 45, BID SCHEDULE – The enclosed SECTION 00 11 00.00 45 entitled BID SCHEDULE supersedes that issued with this Solicitation.

(3) SECTION 00 73 00.01 45, SPECIAL CONTRACT REQUIREMENTS, STANDARD – The enclosed SECTION 00 73 00.01 45 entitled SPECIAL CONTRACT REQUIREMENTS, STANDARD supersedes that issued with this Solicitation.

(4) SECTION 35 20 23.12 45, APPENDIX 1 - QUANTITY SUMMARY TABLE– The enclosed SECTION 35 20 23.12 45 entitled APPENDIX 1 - QUANTITY SUMMARY TABLE supersedes that issued with this Solicitation.

(5) SECTION 35 20 23.14 45, PROTECTION OF SEA TURTLES – The enclosed SECTION 35 20 23.14 45 entitled PROTECTION OF SEA TURTLES supersedes that issued with this Solicitation.

b) Drawings.

(1) DRAWINGS NO. G-002, C-103, AND C-104 – The enclosed drawings no. G-002, C-103, and C-104 supersedes that issued with this solicitation..

2. This amendment shall be attached to and become a part of the solicitation.

W912HY19B0027

A0001-3

5 Encls:

1. SECTION 00 11 00.00 45, BID SCHEDULE

2. SECTION 00 73 00.01 45, SPECIAL CONTRACT REQUIREMENTS, STANDARD

3. SECTION 35 20 23.12 45, APPENDIX 1 - QUANTITY SUMMARY TABLE

4. SECTION 35 20 23.14 45, PROTECTION OF SEA TURTLES

5. DRAWINGS NO. G-002, C-103, AND C-104

SWG FILE NO.: RIO 901-266 SOLICITATION NO.: W912HY19B0027

SECTION TABLE OF CONTENTS

DIVISION 00 - PROCUREMENT AND CONTRACTING REQUIREMENTS

SECTION 00 11 00.00 45

BID SCHEDULE AMENDMENT 0001

PART 1 GENERAL

1.1 BID SCHEDULE

1.1.1 Schedule No. 1

1.1.2 Option No. 1

1.1.3 Option No. 2

1.1.4 Option No. 3

1.1.5 Option No. 4

1.1.6 Option No. 5

1.2 EVALUATION OF OPTIONS (July 1990) (FAR 52.217-5)

-- End of Section Table of Contents --

DOCUMENT 00 11 00.00 45 Page 1 To Accompany Amendment No.: 0001

THIS PAGE INTENTIONALLY LEFT BLANK

DOCUMENT 00 11 00.00 45 Page 2

SECTION 00 11 00.00 45

BID SCHEDULE

AMENDMENT 0001

PART 1 GENERAL

1.1 BID SCHEDULE

(TO BE ATTACHED TO STANDARD FORM 1442)

1.1.1 Schedule No. 1

Item No. Description Estimated Quantity

Unit Unit Price Estimated Amount

SCHEDULE NO. 1

0001 Mobilization and Demobilization 1 JOB SUM $___________

0002 Turtle Deflector Device and Endangered Species Observers

1 JOB

SUM

0003 Dredging Entrance and Jetty Channel Sections 1 and 2 (STA. -13+000 to

STA. 0+000)

587,000 C.Y. $_________ $___________

TOTAL SCHEDULE NO. 1 $___________

NOTE: Completion time stated in SECTION 00 73 00.01 45 SPECIAL CONTRACT REQUIREMENTS, STANDARD is for Schedule No. 1 work.

DOCUMENT 00 11 00.00 45 Page 3

BID SCHEDULE (CONT'D)

(TO BE ATTACHED TO STANDARD FORM 1442)

1.1.2 Option No. 1

Item No.

Description Estimated Quantity

Unit Unit Price Estimated Amount

OPTION NO. 1

0004 Mobilization and Demobilization - Sea Turtle Trawling and Relocation

1 JOB SUM $___________

0005 Sea Turtle Trawling and Relocation 5 DAY $_________ $___________

TOTAL OPTION NO. 1 $___________

TOTAL SCHEDULE NO. 1 AND OPTION NO. 1 $___________

NOTE FOR OPTION NO. 1: The Government may exercise this Option by written notice to the Contractor prior to completion of all authorized work. Award of this Option is contingent upon availability of funds. No additional time will be added to this Contract for completion of this Option.

DOCUMENT 00 11 00.00 45 Page 4

(TO BE ATTACHED TO STANDARD FORM 1442)

1.1.3 Option No. 2

Item No. Description Estimated Quantity

Unit Unit Price Estimated Amount

OPTION NO. 2

0006 Sea Turtle Trawling and Relocation

15 DAY $_________ $___________

TOTAL OPTION NO. 2 $___________

TOTAL SCHEDULE NO. 1 AND OPTIONS NOS. 1 AND 2 $___________

NOTE FOR OPTION NO. 2: The Government may exercise this Option by written notice to the Contractor prior to completion of Option No. 1. Award of this Option is contingent upon availability of funds. No additional time will be added to this Contract for completion of this Option..

DOCUMENT 00 11 00.00 45 Page 5

(TO BE ATTACHED TO STANDARD FORM 1442)

1.1.4 Option No. 3

Item No.

Description Estimated Quantity

Unit Unit Price Estimated Amount

OPTION NO. 3

Sea Turtle Trawling and Relocation

15 DAY $_________ $___________

TOTAL OPTION NO. 3 $___________

TOTAL SCHEDULE NO. 1 AND OPTIONS NOS. 1, 2, AND 3 $___________

NOTE FOR OPTION NO. 3: The Government may exercise this Option by written notice to the Contractor prior to completion of Option No. 2. Award of this Option is contingent upon availability of funds. No additional time will be added to this Contract for completion of this Option.

DOCUMENT 00 11 00.00 45 Page 6

(TO BE ATTACHED TO STANDARD FORM 1442)

1.1.5 Option No. 4

Item No.

Description Estimated Quantity

Unit Unit Price Estimated Amount

OPTION NO. 4

Sea Turtle Trawling and Relocation

15 DAY $_________ $___________

TOTAL OPTION NO. 4 $___________

TOTAL SCHEDULE NO. 1 AND OPTIONS NOS. 1, 2, 3, AND 4 $___________

NOTE FOR OPTION NO. 4: The Government may exercise this Option by written notice to the Contractor prior to completion of Option No. 3. Award of this Option is contingent upon availability of funds. No additional time will be added to this Contract for completion of this Option.

DOCUMENT 00 11 00.00 45 Page 7

(TO BE ATTACHED TO STANDARD FORM 1442)

1.1.6 Option No. 5

Item No.

Description Estimated Quantity

Unit Unit Price Estimated Amount

OPTION NO. 5

0009 Pipeline Management-Beach Placement

1 JOB SUM $___________

Placement of Dredged Material at DMPA No. 1

146,750 C.Y. $_________ $___________

0011 Placement of Dredged Material at DMPA No. 5

440,250 C.Y. $_________ $___________

TOTAL OPTION NO. 5 $___________

TOTAL SCHEDULE NO. 1 AND OPTIONS NOS. 1, 2, 3, 4, AND 5 $___________

NOTE FOR OPTION NO. 5: Bid Item No. 0010 and No. 0011 shall reflect only the difference in cost with respect to Bid Item No. 0003 to place material removed from Section Nos. 1 and 2 at DMPA No. 1 and DMPA No. 5 discharge corridors by hopper pump out in lieu of placement at Nearshore Berm BU Site 2A & 2B. Award of this Option is contingent upon availability of funds. The Government may exercise this Option by written notice to the Contractor prior to completion of all authorized work. An additional time of 14 calendar days will be added to this contract if this Option is exercised.

DOCUMENT 00 11 00.00 45 Page 8

(TO BE ATTACHED TO STANDARD FORM 1442)

1.2 EVALUATION OF OPTIONS (July 1990) (FAR 52.217-5)

Except when it is determined in accordance with FAR 17.206(b) not to be in the Government's best interests, the Government will evaluate offers for award purposes by adding the total price for all options to the total price for the basic requirement. Evaluation of options will not obligate the Government to exercise the option(s).

-- End of Document --

DOCUMENT 00 11 00.00 45 Page 9

DOCUMENT 00 11 00.00 45 Page 10

DIVISION 00 - PROCUREMENT AND CONTRACTING REQUIREMENTS

SECTION 00 73 00.01 45

SPECIAL CONTRACT REQUIREMENTS, STANDARD AMENDMENT 0001

PART 1 GENERAL

1.1 COMMENCEMENT, PROSECUTION, AND COMPLETION OF WORK (APR 1984) (FAR

52.211-10)

1.2 LIQUIDATED DAMAGES - CONSTRUCTION (SEPT 2000) (FAR 52.211-12)

1.3 PHYSICAL DATA (APR 1984) (FAR 52.236-4)

1.4 QUANTITY SURVEYS (APR 1984) (FAR 52.236-16)

1.5 EQUIPMENT OWNERSHIP AND OPERATING EXPENSE SCHEDULE(MAR 1995)

1.6 (SCR-S-102) CONTRACTOR SUPPLY AND USE OF ELECTRONIC SOFTWARE FOR

PROCESSING DAVIS-BACON ACT CERTIFIED LABOR PAYROLLS (April 2011)

1.7 PERFORMANCE OF WORK BY THE CONTRACTOR (APR 1984) (52.236-1)

PART 2 PRODUCTS (Not Used)

PART 3 EXECUTION (Not Used)

-- End of Section Table of Contents --

DOCUMENT 00 73 00.01 45 Page 1

DOCUMENT 00 73 00.01 45 Page 2

SECTION 00 73 00.01 45

SPECIAL CONTRACT REQUIREMENTS, STANDARD

AMENDMENT 0001

PART 1 GENERAL

1.1 COMMENCEMENT, PROSECUTION, AND COMPLETION OF WORK (APR 1984) (FAR

52.211-10)

The Contractor shall be required to:

(a) Commence work under this contract within 10 calendar days after the date the Contractor receives the Notice to Proceed;

(b) Prosecute the work diligently, and

(c) Complete the entire work ready for use not later than (AM#1) 48 calendar days after the date the Contractor receives the Notice to Proceed. The time stated for completion shall include final cleanup of the premises.

1.2 LIQUIDATED DAMAGES - CONSTRUCTION (SEPT 2000) (FAR 52.211-12)

(a) If the Contractor fails to complete the work within the time specified in the contract, the Contractor shall pay liquidated damages to the Government in the amount of $3,108.00 for each calendar day of delay until the work is completed or accepted.

(b) If the Government terminates the Contractor's right to proceed, liquidated damages will continue to accrue until the work is completed. These liquidated damages are in addition to excess costs of repurchase under the Termination clause.

1.3 PHYSICAL DATA (APR 1984) (FAR 52.236-4)

Data and information furnished or referred to below is for the Contractor's information. The Government shall not be responsible for any interpretation of or conclusion drawn from the data or information by the Contractor.

(a) The indications of physical conditions on the drawings and in the specifications are the result of site investigations by surveys.

(b) Weather Conditions. Under ordinary conditions, the mean tidal range is about 1.0 foot. The height of tide is largely dependent on the force, direction, and duration of the wind. Strong northerly winds may depress the water surface as much as, and in some instances more than 1.0 foot below Mean Lower Low Water (MLLW), while southerly winds may raise the water surface as much as, and in some instances more than 3.0 feet above MLLW.

(c) Transportation Facilities. The immediate vicinity is served by railroad, highway, and deep and shallow draft channels. The Brownsville Ship Channel is accessible by water via the Gulf Intracoastal Waterway and the Gulf of Mexico. The Port of Brownsville

DOCUMENT 00 73 00.01 45 Page 3 and Port Isabel have public port facilities and are served by all-weather highways. The Port of Brownsville is also served by the Missouri-Pacific Railroad and Southern Pacific Railroad Lines.

Dredging and attendant plant may be brought to the work site via the Gulf Intracoastal Waterway.

(d)Condition of Channel. The general shape of the existing section of channel to be dredged is shown by cross sections on the Contract drawings.

(e) Channel Traffic. Channel traffic consists of deep draft ocean going vessels, small boats of various sizes, fishing vessels, recreational boats, ferries, tugs, tows consisting of a tug and one or more barges. Traffic will interfere with dredging operations to some extent.

1.4 QUANTITY SURVEYS (APR 1984) (FAR 52.236-16)

(a) Quantity surveys shall be conducted, and the data derived from these surveys shall be used in computing the quantities of work performed and the actual construction completed and in place.

(b) The Government shall conduct the original and final surveys and make the computations based on them. The Contractor shall conduct the surveys for any periods for which progress payments are requested and make the computations based on these surveys. All surveys conducted by the Contractor shall be conducted under the direction of the Contracting Officer, unless the Contracting Officer waives this requirement in a specific instance.

(c) Promptly upon completing a survey, the Contractor shall furnish the originals of all field notes and all other records relating to the survey or to the layout of the work to the Contracting Officer, who shall use them as necessary to determine the amount of progress payments. The Contractor shall retain copies of all such material furnished to the Contracting Officer.

1.5 EQUIPMENT OWNERSHIP AND OPERATING EXPENSE SCHEDULE(MAR 1995)

(a) This special contract requirement does not apply to terminations.

See 52.249-5000, Basis for Settlement of Proposals, and FAR Part 49.

(b) Allowable cost for construction and marine plant and equipment in sound workable condition owned or controlled and furnished by a contractor or subcontractor at any tier shall be based on actual cost data for each piece of equipment or groups of similar serial and series for which the Government can determine both ownership and operating costs from the con-tractor's accounting records. When both ownership and operating costs cannot be determined for any piece of equipment or groups of similar serial or series equipment from the contractor's accounting records, costs for that equipment shall be based upon the applicable provisions of EP

DOCUMENT 00 73 00.01 45 Page 4

1110-1-8, Construction Equipment Ownership and Operating Expense Schedule, Region VI. Working conditions shall be considered to be average for determining equipment rates using the schedule unless specified otherwise by the contracting officer. For equipment not included in the schedule, rates for comparable pieces of equipment may be used or a rate may be developed using the formula provided in the schedule. For forward pricing, the schedule in effect at the time of negotiations shall apply. For retroactive pricing, the schedule in effect at the time the work was performed shall apply.

(c) Equipment rental costs are allowable, subject to the provisions of FAR 31.105(d)(ii) and FAR 31.205-36, Rental Costs. Rates for equipment rented from an organization under common control, lease-purchase arrangements, and sale-leaseback arrangements, will be determined using the schedule, except that actual rates will be used for equipment leased from an organization under common control that has an established practice of leasing the same or similar equipment to unaffiliated lessees.

(d) When actual equipment costs are proposed and the total amount of the pricing action exceeds the SAT, the contracting officer shall request the contractor to submit either certified cost or pricing data, or partial/limited data, as appropriate. The data shall be submitted on Standard Form 1411, Contract Pricing Proposal Cover Sheet.

NOTE: A copy of EP 1110-1-8, "CONSTRUCTION EQUIPMENT OWNERSHIP AND OPERATING EXPENSE SCHEDULE," is available at the following website:

http://www.publications.usace.army.mil/USACEPublications/EngineerPamphlets.aspx.

1.6 (SCR-S-102) CONTRACTOR SUPPLY AND USE OF ELECTRONIC SOFTWARE FOR

PROCESSING DAVIS-BACON ACT CERTIFIED LABOR PAYROLLS (April 2011)

The contractor is encouraged to use a commercially-available electronic system to process and submit certified payrolls electronically to the Government. The requirements for preparing, processing and providing certified labor payrolls are established by the Davis-Bacon Act as stated in FAR 52.222-8, PAYROLLS AND BASIC RECORDS and FAR 52.222-13, COMPLIANCE

WITH DAVIS-BACON AND RELATED ACT REGULATIONS.

If the contractor elects to use an electronic Davis-Bacon payroll processing system, then the contractor shall be responsible for obtaining and providing for all access, licenses, and other services required to provide for receipt, processing, certifying, electronically transmitting to the Government, and storing weekly payrolls and other data required for the contractor to comply with Davis-Bacon and related Act regulations.

When the contractor uses an electronic Davis-Bacon payroll system, the electronic payroll service shall be used by the contractor to prepare, process, and maintain the relevant payrolls and basic records during all work under this construction contract and the electronic payroll service shall be capable of preserving these payrolls and related basic records for the required 3 years after contract completion. If the contractor chooses to use an electronic Davis-Bacon payroll system, then the contractor shall obtain and provide electronic system access to the Government, as required to comply with the Davis-Bacon and related Act regulations over the duration of this construction contract. The access shall include electronic review access by the Government contract administration office to the electronic payroll processing system used by the contractor.

The contractor's provision and use of an electronic payroll processing

DOCUMENT 00 73 00.01 45 Page 5 system shall meet the following basic functional criteria: commercially available; compliant with appropriate Davis Bacon Act payroll provisions in the FAR; able to accommodate the required numbers of employees and subcontractors planned to be employed under the contract; capable of producing an Excel spreadsheet-compatible electronic output of weekly payroll records (format at http://rms.usace.army.mil/) for export in an Excel spreadsheet to be imported into the contractor's Quality Control System (QCS) version of Resident Management System (RMS), that in turn shall export payroll data to the Government's Resident Management System (RMS); demonstrated security of data and data entry rights; ability to produce contractor-certified electronic versions of weekly payroll data;

ability to identify erroneous entries and track the data/time of all versions of the certified Davis Bacon payrolls submitted to the government over the life of the contract; capable of generating a durable record copy, that is, a CD or DVD and PDF file record of data from the system database at end of the contract closeout. This durable record copy of data from the electronic Davis-Bacon payroll processing system shall be provided to the Government during contract closeout.

All contractor-incurred costs related to the contractor's provision and use of an electronic payroll processing service shall be included in the contractor's price for the overall work under the contract. The costs for Davis-Bacon Act compliance using electronic payroll processing services shall not be a separately bid/proposed or reimbursed item under this contract.

1.7 PERFORMANCE OF WORK BY THE CONTRACTOR (APR 1984) (52.236-1)

The Contractor shall perform on the site, and with its own organization, work equivalent to at least 65 percent of the total amount of work to be performed under the contract. This percentage may be reduced by a supplemental agreement to this contract if, during performing the work, the Contractor requests a reduction and the Contracting Officer determines that the reduction would be to the advantage of the Government.

PART 2 PRODUCTS (Not Used)

PART 3 EXECUTION (Not Used)

-- End of Document --

DOCUMENT 00 73 00.01 45 Page 6

SWG FILE NO.:RIO 901-266 SOLICITATION NO.:W912HY19B0027

Side Slope

Required Depth

(CY)

Allowable Overdepth

(CY)

Total Estimated

(CY)

1 -13+000 -6+000 7,000 300 42+4 6:1 2 101,000 121,000 222,000 Nearshore Berm 2A/2B

2 -6+000 0+000 6,000 VARIES 42+4 6:1 2 270,000 95,000 365,000 Nearshore Berm 2A/2B

13,000 371,000 216,000 587,000

TOTAL SCHEDULE 1

The term “Required Depth” is synonymous with the term “Prescribed Depth” and “Required Dredging Prism” used elsewhere in the specifications.

Includes anticipated shoaling.

SCHEDULE 1 - BIH - Entrance and Jetty Channel

APPENDIX 1 - QUANTITY SUMMARY TABLE

CHANNEL DIMENSIONS QUANTITIES

Placement Area

Distribution Section

No.

From

Station To

Station

Length of Station (Feet)

Width Project Depth

Allowable Overdepth

Section 35 20 23.12 45 - APPENDIX 1 - QUANTITY SUMMARY TABLE - Page 1

TO ACCOMPANY AMENDMENT 0001 TO W912HY19B0027

DIVISION 35 - WATERWAY AND MARINE CONSTRUCTION

SECTION 35 20 23.14 45

PROTECTION OF SEA TURTLES AMENDMENT NO. 0001

PART 1 GENERAL

1.1 OPERATIONS AND DREDGING ENDANGERED SPECIES SYSTEM (ODESS) GUIDANCE

1.2 REFERENCES

1.3 MEASUREMENT AND PAYMENT

1.4 SUBMITTALS

PART 2 PRODUCTS (Not Used)

PART 3 EXECUTION

3.1 PROTECTION OF SEA TURTLES

3.1.1 Endangered Species Protection

3.1.2 Dredge Inspection

3.2 SEA TURTLE TRAWLING AND RELOCATION

3.2.1 Initiation Of Trawling

3.2.2 Trawling Requirements

3.2.3 Trawling Nets

3.2.4 Sea Turtle Handling and Measurements

3.2.4.1 Weight and Size Measurements

3.2.4.2 Passive Integrated Transponder Tag Scanning

3.2.4.3 Passive Integrated Transponder Tagging

3.2.4.4 Tissue Sampling for Genetic Analyses

3.2.4.5 Handling During Trawling

3.2.4.6 Take and Release Time During Trawling

3.2.4.7 Handling Fibropapillomatose Turtles

3.2.5 Reports

3.2.6 Repair and Replacement of Damaged Trawl Nets

3.2.7 Suspension of Dredging and Relocation Trawling

3.2.8 Water Quality and Physical Measurements

3.2.9 Report Submission

3.3 ENDANGERED SPECIES OBSERVER(S), HOPPER DREDGING

3.3.1 Monitoring

3.3.2 Recording

3.3.3 National Oceanic and Atmospheric Administration

Fisheries-approved Firms

3.3.4 Responsibilities

3.4 DISPOSITION OF TURTLES OR TURTLE PARTS

3.5 NOTIFICATION

3.6 REPORTING

3.6.1 Report

3.7 TURTLE MONITORING EQUIPMENT

3.7.1 Sea Turtle Requirements

3.7.2 Inflow Screens

3.7.3 Dredge Lighting

SECTION 35 20 23.14 45 Page 1

3.7.3.1 Floodlights

3.7.3.2 Sea Turtle Nesting Season

3.8 HOPPER DREDGE DRAGHEAD EQUIPMENT

3.8.1 Deflector Design

3.8.1.1 Deflector Angle

3.8.1.2 Depth Deflectors

3.8.1.3 Maintenance

3.8.2 Paint Test Inspection of Draghead

3.8.2.1 Equipment preparation

3.8.2.2 Test Procedure

3.8.2.3 Test Results

3.8.2.4 Test Documentation

3.9 HOPPER DREDGE OPERATIONS

3.9.1 Operation

3.9.2 Draghead Suction

3.9.3 Pumps

3.9.4 Suction Pipe Densities and Velocities

3.9.5 Compliance

ATTACHMENTS:

Appendix A - COE SEA TURTLE INSPECTION CHECKLIST FOR HOPPER DREDGES

Appendix B - TURTLE TRAWL NETS SPECIFICATIONS

Appendix C - SEA TURTLE TAGGING REPORT

Appendix D - SEA TURTLE TRAWLING REPORT

Appendix E - USACE SEA TURTLE/DREDGING DATABASE POST-HOPPER DREDGING

PROJECT CHECKLIST

Appendix F - SEA TURTLE INCIDENTAL TAKE DATA FORM

Appendix G - TURTLE DEFLECTOR PLANS

-- End of Section Table of Contents --

SECTION 35 20 23.14 45 Page 2

SECTION 35 20 23.14 45

PROTECTION OF SEA TURTLES

AMENDMENT NO. 0001

PART 1 GENERAL

1.1 OPERATIONS AND DREDGING ENDANGERED SPECIES SYSTEM (ODESS) GUIDANCE

Refer to SECTION 01 57 20.00 45 ENVIRONMENTAL PROTECTION, for ODESS Guidance.

1.2 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

U.S. ARMY CORPS OF ENGINEERS (USACE)

EM 1110-1-1003 (2003)Engineering and Design - NAVSTAR Global Positioning System Surveying

EM 385-1-1 (2014) Safety and Health Requirements Manual

1.3 MEASUREMENT AND PAYMENT

Measurement and payment for protection of sea turtles will be paid for in accordance with provisions of the SECTION 01 22 00.10 MEASUREMENT AND

PAYMENT.

1.4 SUBMITTALS

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

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. Submit the following in accordance with SECTION 01 33 00 SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

Sea Turtle Trawling and Relocation Permit; G

The Contractor shall submit documentation that the trawling supervisor is approved by NOAA Fisheries for this activity.

Additionally, the trawling supervisor shall possess the applicable State permits for handling threatened or endangered species before commencing trawling.

SD-02 Shop Drawings

Turtle Deflector Device; G

Detailed shop drawings shall be submitted showing the proposed

SECTION 35 20 23.14 45 Page 3 device and its attachment to the Contractor's equipment. Shop drawings to be submitted shall include the approach angle for any and all depths to be dredged during this Contract. A copy of the approved drawings and calculations shall be available on the vessel during the life of this Contract. No dredging work will be allowed to commence until approval of the turtle deflector device.

SD-06 Test Reports

Deflector Paint Test Documentation; G

The following paint test information with CQC signature shall be submitted for verification:

Load number Time of paint test and date Duration of paint test Material type Observed plow depth of the leading edge of the deflector during the paint test Gimbal angle during paint test Test result: pass or fail Failed test: document corrective action taken for re-test Photo documentation of deflector paint test results.

SD-11 Closeout Submittals

Logs and Final Summary Report; G

Submit, as specified, logs and final summary report of sightings and incidents with endangered species as specified below.

PART 2 PRODUCTS (Not Used)

PART 3 EXECUTION

3.1 PROTECTION OF SEA TURTLES

Observe the surrounding waters in the vicinity of its operations for the presence of sea turtles during dredging, placement, or travel between the Channel and ODMDS. If the Contractor encounters or observes sea turtles during its operations, the Contracting Officer shall be notified by the fastest available method. After investigation by the Contracting Officer, the Contractor will be instructed on further actions necessary.

3.1.1 Endangered Species Protection

Instruct personnel associated with this project of the potential presence of sea turtles in the area and the need to avoid collisions with these animals. Construction personnel shall be advised that there are civil and criminal penalties for harming, harassing or killing sea turtles which are protected by the Endangered Species Act of 1973. The Contractor will be held responsible for turtles harmed, harassed or killed as a result of dredging activities that are not conducted in accordance with these specifications.

3.1.2 Dredge Inspection

Prior to commencement of work or as soon as possible after work has begun, SECTION 35 20 23.14 45 Page 4 a hopper dredge inspection shall be performed using the Appendix A - COE SEA TURTLE INSPECTION CHECKLIST FOR HOPPER DREDGES, attached at the end of this Section. Documented deficiencies shall be corrected prior to proceeding with dredging. This type of inspection shall also be conducted as soon as possible following a turtle take by the dredge.

3.2 SEA TURTLE TRAWLING AND RELOCATION

Trawling shall be conducted to remove turtles from the Channel during dredging to help prevent entrainment by the dredge. Trawling shall be conducted for a period of 24 hours each day.

3.2.1 Initiation Of Trawling

Initiate trawling and relocation activity in the dredging area within 48 hours of being notified. Trawling shall continue until suspended by the Contracting Officer.

3.2.2 Trawling Requirements

Relocation trawling shall be conducted to remove turtles from the Channel during dredging to help prevent entrainment by the dredge. Trawling shall be conducted for a period of 24 hours each day. If two separate trawlers are required, they shall operate side-by-side as much as practicable. If multiple dredges are utilized, the trawler(s) shall be used for each dredge actively performing dredging operations. If the dredging operations are coordinated so that only one dredge is actively dredging, trawler(s) shall be required for only that dredge. If dredging operations cease for a period of 12 hours or more, relocation trawling shall be conducted a minimum of 4 hours prior to resuming of dredging operations. The trawler(s) shall be positioned ahead of the hopper dredge and as close to the hopper dredge as safely possible to give maximum coverage ahead of the dredging cut. The dredge and trawler(s) shall work closely together to implement techniques and procedures that will minimize the opportunity for turtles to enter the dredging path between the trawler(s) and dredge.

NOTE: TRAWLING ACTIVITIES, VESSELS, AND EQUIPMENT SHALL COMPLY

WITH THE CONTRACTOR'S ACCIDENT PREVENTION PLAN AND THE

REQUIREMENTS OF THE U.S. ARMY CORPS OF ENGINEERS SAFETY AND HEALTH

REQUIREMENTS ENGINEERING MANUAL EM 385-1-1. Trawling shall be conducted at a speed between 2.5 to 3.0 knots using repetitive 15-to 30-minute (total time) trawls in the Channel or other work area. Trawl tow-time duration shall not exceed 30 minutes (doors in - doors out) and trawl speeds shall not exceed 3.5 knots.

Positions at the beginning and end of each tow shall be determined from the Global Positioning System (GPS) equipment. Tow speed shall be recorded at the approximate midpoint of each tow.

Acceptable GPS criteria shall be in accordance with EM 1110-1-1003, https://www.publications.usace.army.mil/usace-publications/engineer-manuals/

- Paragraph 5.3 and Table 5-1. This EM 1110-1-1003 can be purchased directly from the Government Printing Office by calling

(202) 512-1800. The postal address is Superintendent of Documents, P. O. Box 371954, Pittsburgh, Pennsylvania 15250-7954 or on-line at http://bookstore.gpo.gov/.

3.2.3 Trawling Nets

The trawler shall be equipped with two 60-foot flat-style trawling nets fabricated from 8-inch mesh (stretch). The nets shall be fitted with mud

SECTION 35 20 23.14 45 Page 5 rollers and floats as specified in Appendix B - TURTLE TRAWL NETS SPECIFICATIONS that is attached at the end of this Section.

3.2.4 Sea Turtle Handling and Measurements

At least one crew member, who possesses the required permits for handling endangered species, experienced in sea turtle capture or is a National Oceanic and Atmospheric Administration (NOAA) Fisheries-approved observer, shall be on board the trawler during the trawl and act as the sea turtle trawling and relocation supervisor. Only a NOAA Fisheries-approved observer or observer candidate in training under the direct supervision of a NOAA Fisheries-approved observer shall conduct the sampling operations of tagging, measuring, and weighing tissue. Each turtle that is captured shall be identified, scanned for Passive Integrated Transponder (PIT) tags, measured, tagged, and released and the data recorded in Appendix C - SEA TURTLE TAGGING REPORT attached at the end of this Section. External tags shall also be noted and data recorded into the observer's log. Turtles shall be released at locations at least 3 nautical miles (nmi) south of the Channel centerline, at time intervals designated by the Sea Turtle Trawling and Relocation Supervisor who is proficient in the viable handling and relocating of sea turtles.

3.2.4.1 Weight and Size Measurements

Turtles shall be measured, tagged, and weighed when safely possible, prior to release. Turtle measurements shall be recorded and shall include, at a minimum, weight when possible, straight-line length, straight-line width, body depth, and tail length. Turtles shall be tagged with NMFS No. 681 Inconel tags in each of the front flippers according to National Marine Fisheries Service (NMFS) protocol. Aseptic conditions shall be maintained for tags and tag attachment. The Contractor shall be responsible for obtaining permits related to trawling from the appropriate State and Federal agencies. Aspects of trawling shall be coordinated with the U.S.

Army Corps of Engineers, Galveston District and contact Ms. Lisa Finn, phone (409) 766-3949 or e-mail lisa.m.finn@usace.army.mil.

3.2.4.2 Passive Integrated Transponder Tag Scanning

Sea turtles captured by relocation trawling or dredges shall be thoroughly scanned for the presence of Passive Integrated Transponder (PIT) tags prior to release using a scanner powerful enough to read dual frequencies, including but not limited to 125 and 134 kHz and read tags deeply embedded in muscle tissue, for example: those manufactured by Biomark or Avid.

Turtles that have been previously PIT-tagged shall never-the-less be externally flipper tagged. The data collected which includes PIT tag scan data and external tagging data, shall be submitted to NOAA, National Marine Fisheries Service, Southeast Fisheries Science Center, Attn: Ms. Lisa Belskis, 75 Virginia Beach Drive, Miami, Florida 33149. Data collected shall be submitted in electronic format within 60 working days to Lisa.Belskis@noaa.gov. External flipper tag and PIT tag data generated and collected by relocation trawlers shall also be submitted to the Cooperative Marine Turtle Tagging Program (CMTTP), on the appropriate CMTTP form, at the University of Florida's Archie Carr Center for Sea Turtle Research.

3.2.4.3 Passive Integrated Transponder Tagging

All live captured sea turtles shall receive PIT tags (in addition to the standard external tagging) prior to release; but only if the NMFS-approved protected species observer has received prior training in PIT tagging

SECTION 35 20 23.14 45 Page 6 procedures. PIT tagging of sea turtles is not required, if the observer does not have prior training or experience in these procedures.

(1) Sea turtle PIT tagging shall be performed in accordance with the protocol detailed at NMFS' Southeast Fisheries Science Center's Web page: https://www.galvestonlab.sefsc.noaa.gov/forms/observer/ (on SEFSC's "Fisheries Observers" Web page.)

(2) Passive Integrated Transponder tags used shall be sterile, individually-wrapped tags to prevent disease transmission. PIT tags shall be 125-kHz, glass-encapsulated tags-the smallest ones made. If scanning reveals a PIT tag and it was not difficult to find, then do not insert another PIT tag; simply record the tag number and location, and frequency, if known. If for some reason the tag is difficult to detect, for example: tag is embedded deep in muscle, or is a 400-kHz tag, then insert one in the other shoulder.

3.2.4.4 Tissue Sampling for Genetic Analyses

Live or dead sea turtles captured by relocation trawling and hopper dredging shall be tissue-sampled by NMFS-approved protected species observers prior to release. Sea turtle tissue samples shall be taken in accordance with NMFS' Southeast Fisheries Science Center's (SEFSC) procedures for sea turtle genetic analyses. The tissue samples taken shall be collected and stored properly and mailed within 60 days of the completion of the dredging project to: NOAA, National Marine Fisheries Service, Southeast Fisheries Science Center, Attn: Ms. Lisa Belskis, 75 Virginia Beach Drive, Miami, Florida 33149. Guidance can be found at NMFS' Southeast Fisheries Science Center's Web page:

https://www.galvestonlab.sefsc.noaa.gov/forms/observer/ on SEFSC's "Fisheries Observers" Web page.

3.2.4.5 Handling During Trawling

Sea turtles captured during relocation trawling shall be kept moist and shaded when possible, and handled using a method designed to ensure their safety and viability. Turtles shall be released over the side of the vessel, away from the propeller, only after ensuring that the vessel's propeller is in the neutral or disengaged position. For example: not rotating.

3.2.4.6 Take and Release Time During Trawling

Turtles shall be kept no longer than 12 hours prior to release and shall be released not less than 3 nmi from the dredge site. If two or more released turtles are later recaptured, subsequent turtle captures shall be released not less than 5 nmi away. Dredging operations shall not be hindered by the relocation of captured turtles. This can be accomplished by relocating turtles during the discharge cycle or by carefully transferring them to another vessel for transport to the release area to enable the relocation trawler to keep sweeping the dredge site without interruption of dredging.

3.2.4.7 Handling Fibropapillomatose Turtles

Anyone handling sea turtles infected with fibropapilloma tumors shall either:

(1) Clean all equipment that comes in contact with an infected turtle with a mild bleach solution before processing another turtle or

SECTION 35 20 23.14 45 Page 7

(2) maintain a separate set of sampling equipment for handling turtles displaying fibropapilloma tumors or lesions.

3.2.5 Reports

The results of each trawl shall be recorded in Appendix D - SEA TURTLE TRAWLING REPORT forms developed for this purpose. An example is attached at the end of this Section. A Final Report shall be prepared and submitted upon completion of dredging that summarizes the results and includes all forms, total trawling times, number of trawls, and number of captures.

Turtles captured during the trawling shall be measured and tagged in accordance with standard biological sampling procedures with sampling data recorded on the "Sea Turtle Tagging Report" forms developed for this purpose. An example is attached as Appendix C at the end of this Section.

Captured sea turtles shall be relocated south of the work area at least 3 nmi from the location recorded on the Sea Turtle Tagging and Relocation Report Form. Submitted copies of these forms shall be legible with a minimum of smudges or blackened areas.

3.2.6 Repair and Replacement of Damaged Trawl Nets

At the time of mobilization, the Contractor shall provide trawl nets that meet the requirements specified in Appendix B - TURTLE TRAWL NET SPECIFICATIONS at the end of this Section. Trawl nets that are damaged shall be repaired or replaced by the Contractor at no additional expense to the Government. Tools, supplies, and materials for repairing nets shall be kept aboard the trawler. If trawl nets are damaged, repair or replacement shall be attempted as soon as possible to ensure that dredging work is not adversely delayed due to trawler down-time. The Contractor shall have at least one set of replacement nets immediately available at all times. It is recommended that a second set of replacement nets be available aboard the trawler.

3.2.7 Suspension of Dredging and Relocation Trawling

If nets become torn or the equipment breaks down causing the trawler to leave the area where dredging is underway, the dredge may continue to operate for up to 48 hours, as long as no turtles are taken and subject to the discretion of the Contracting Officer. If there are dangerously high seas that can cause the trawler to leave the dredging area, the dredge may continue to operate as long as no turtles are taken and as directed.

3.2.8 Water Quality and Physical Measurements

Water temperature measurements shall be taken at the water surface each day using a laboratory thermometer. Weather conditions shall be recorded from visual observations and instruments on the trawler. Weather conditions, air temperature, wind speed and direction, sea state-wave height, and bottom type shall be recorded on the Sea Turtle Trawling Report appended as Appendix E to the end of this Section. High and low tides shall also be recorded.

3.2.9 Report Submission

Following completion of this project, a copy of the Contractor's Logs and Final Summary Report recording sea turtles shall be submitted [submitted in accordance with SECTION 01 78 00.00 45 CLOSEOUT SUBMITTALS and a copy ]forwarded to Ms. Lisa M. Finn, Environmental Section, U. S. Army Corps of

SECTION 35 20 23.14 45 Page 8

Engineers within 10 working days.

3.3 ENDANGERED SPECIES OBSERVER(S), HOPPER DREDGING

During hopper dredging operations, observer(s) provided by the Contractor and approved by the NMFS shall be aboard to monitor for the presence of sea turtles. The observer(s) shall be provided quarters and meals aboard the dredge at least equal to that of the dredge crew.

3.3.1 Monitoring

The observer(s) shall continuously monitor the hopper sampling screens or baskets and dragheads for turtles or turtle parts after each load cycle, 24 hours a day during the dredging mode. Observer(s) shall remove debris from the screens with the assistance of the ship's crew.

3.3.2 Recording

The results of monitoring shall be recorded on appropriate observation sheets located at Appendix E - USACE SEA TURTLE/DREDGING DATABASE POST-HOPPER DREDGING PROJECT CHECKLIST, at the end of this section. There is a sheet for each load, a daily summary sheet, and a weekly summary sheet. In addition, there is a post dredging summary sheet. An observation sheet shall be completed for each day detailing that day's monitoring.

Furthermore, a log shall be kept, detailing each load whether or not sea turtle or sea turtle parts are present. Sample observation sheets are appended at the end of this Section. In the event of any sea turtle take by the dredge, appropriate incident reporting forms shall be completed.

Additionally, captured specimens shall be photographed using a digital camera. These photographs shall be attached to respective reports for documentation. Dredging of subsequent loads shall not commence until all appropriate reports are completed from the previous dredging load. This includes documentation of any sea turtle take. Copies of forms submitted shall be legible with a minimum of smudges or blackened areas.

Additionally, if a sea turtle take occurs, DQM data, including the full load cycle in which the take occurred, shall be sent immediately to the DQM Customer Support Team.

3.3.3 National Oceanic and Atmospheric Administration Fisheries-approved Firms

National Oceanic and Atmospheric Administration Fisheries-approved Firms shall provide and manage the endangered species observer(s) for hopper dredging. Observer(s) shall possess the appropriate State and Federal approvals and permits for handling endangered or threatened species.

Evidence of approval shall be provided. A list of acceptable firms can be obtained by contacting NMFS, Protected Resources Division, Florida at

(727) 551-5610, or online http://sero.nmfs.noaa.gov/protected_resources/ section_7/observer/documents/observer_companies_updated_4_2013.pdf.

3.3.4 Responsibilities

The observer(s) shall also be responsible for assuring that:

(1) Temperatures in the waterway are taken in degrees Celsius, at the surface and at the mid-depth. The readings shall be made each 8 hours for the duration of the dredging assignment. The waterway mileage and latitude and longitude shall be recorded, corresponding to each temperature reading.

SECTION 35 20 23.14 45 Page 9

(2) During transit of the dredge to or from the Placement site, after dredging has ceased, the screen observer(s) shall assure that the hopper screens are cleaned of debris and correctly re-installed on the dredge for return to dredging mode. The observer(s) shall report damage of the screens to the Contracting Officer immediately upon detection of this damage.

(3) Complete turtle data reporting as specified in the Paragraph:

REPORTING below.

3.4 DISPOSITION OF TURTLES OR TURTLE PARTS

Dead turtles or their parts shall be identified as recent or old kills based on the evidence of fresh blood, odor, and length of time in the water since death. Positively identified turtle parts shall be stored until instructions are given regarding final disposition. Tissue samples shall be collected as specified above in the Subparagraph: Tissue Sampling for Genetic Analyses. Turtle parts that cannot be positively identified onboard the dredge shall be preserved by the observer(s) or color photographed using a digital camera. The photos shall be attached to respective reports for documentation and later identification. Observer(s) shall measure, weigh, tag (PIT and external tags), and obtain tissue samples from uninjured turtles accidentally taken by the dredge prior to release. PIT tags shall be inserted in accordance with the Subparagraph:

PIT Tagging, above. Turtle handling and tagging methods shall be performed in accordance with NOAA Fisheries-approved procedures. Observer(s), or their authorized representative(s), shall transport injured turtles to a rehabilitation facility as soon as possible. The NOAA Fisheries-approved turtle transporters shall be used for this purpose. A partial list of contacts for injured turtles is below. It is not necessary to contact all individuals for a given area.

Tel. 1-866-TURTLE-5

Texas Marine Mammal Stranding Network

800-9-MAMMAL

3.5 NOTIFICATION

The observer(s) shall notify the Contracting Officer of collisions with, and the taking of injured, uninjured or killed sea turtles as soon as possible, but no later than 24 hours after. The observer(s) or Contractor shall complete the appropriate incident report forms appended as Appendix F

- SEA TURTLE INCIDENTAL TAKE DATA FORM, and transmit a FAX of this information, within 24 hours, to the NMFS Southeast Regional Office, (727) 824-5309 or e-mail in pdf format to takereport.nmfsser@noaa.gov; and Galveston District, ATTN: Ms. Lisa Finn, (409) 766-3949 or e-mail to lisa.m.finn@usace.army.mil.

3.6 REPORTING

The Contractor shall maintain a log that details every incident, including sightings, collisions with, injuring or killing sea turtles that occurs during this Contract period. The monitoring data shall be recorded on copies of the observation sheets attached at the end of this Section. An observation sheet shall be completed for each day's operation whether or not turtle parts are detected on the screens. Within 10 calendar days of data collection, completed data reports shall be forwarded directly to:

SECTION 35 20 23.14 45 Page 10

USAED - Galveston

CESWG-OD-N

ATTN: Ms. Lisa M. Finn P.O. Box 1229 Galveston, Texas 77553-1229

(409) 766-3949

(409) 766-3064 (FAX)

e-mail: lisa.m.finn@usace.army.mil

Copies of the data shall also be submitted to the Contracting Officer.

3.6.1 Report

Following completion of dredging, a report summarizing the above incidents and sightings shall be submitted not later than 30 calendar days and shall be submitted to:

(1) The Contracting Officer;

(2) Ms. Lisa Finn; and

(3) NMFS at the following address:

National Marine Fisheries Service Protected Resources Division Southeast Region 263 13th Avenue S.

St. Petersburg, Florida 33701

3.7 TURTLE MONITORING EQUIPMENT

3.7.1 Sea Turtle Requirements

Sea Turtle Requirements are in effect year round. The dredge shall have 100 percent in-flow screening of dredged material. Also, when possible, hopper overflow screening shall be correctly installed as a secondary measure. If conditions prevent 100 percent inflow screening, inflow screening may be reduced gradually, as further detailed in the following Subparagraph, but 100 percent overflow screening is then required. At commencement of dredging operations, the screens shall have openings no greater than 4-inch by 4-inch. The screens shall sample 100 percent of the in-flow or overflow, as applicable, and shall remain in place for the duration of dredging activities. The screen structure shall be designed to withstand the forces exerted on the screens during dredging operations.

Screen design and operation shall be approved prior to commencement of dredging. No dredging can proceed until screen design and operation is installed and approved. When detected, damaged screens shall be repaired by the Contractor before commencing dredging on the load.

3.7.2 Inflow Screens

The hopper's inflow screens shall have 4-inch by 4-inch screening. If the observers and the draghead operator determine that the draghead is clogging and reducing production substantially, the screens may be modified sequentially as follows: mesh size may be increased to 6-inch by 6-inch, then 9-inch by 9-inch, then 12-inch by 12-inch openings. Further clogging or other difficulties may compel partial or complete removal of the screening altogether, in each of these situations, effective 100 percent overflow screening is mandatory.