APPENDIX C-SPECIFICATIONS_StaCapeDdredge_21 Sept 2022.pdf

DEPARTMENT OF HOMELAND SECURITY

UNITED STATES COAST GUARD

CIVIL ENGINEERING UNIT OAKLAND

OAKLAND, CALIFORNIA 94612-5203

PSN 21034736

SPECIFICATIONS

FOR

MAINTENANCE DREDGING

AT

COAST GUARD STATION CAPE DISAPPOINTMENT

BAKER BAY- ILWACO, WASHINGTON

Civil Engineering Unit Oakland Initial Date

A. Gilda Barboza

PROJECT MANAGER

Constance M. Callahan

CHIEF, ENVIRONMENTAL MANAGEMENT BRANCH

TABLE OF CONTENTS

SECTION TITLE PAGE

DIVISION 01 - GENERAL REQUIREMENTS 1

01 10 00 - GENERAL PARAGRAPHS 1

01 33 00 – SUBMITTALS PROCEDURES 8

01 35 29 – HEALTH, SAFETY, AND EMERGENCY RESPONSE PROCEDURES 10

01 35 43 – ENVIRONMENTAL PROCEDURES 13

DIVISION 35 – WATERWAY AND MARINE CONSTRUCTION 18

35 20 23 - DREDGING 18

DIVISION 01 - GENERAL REQUIREMENTS

01 10 00 - GENERAL PARAGRAPHS

PART 1 GENERAL

1.01 SCOPE OF WORK: Provide all labor, materials, and equipment necessary to dredge and dispose of sediment from the mooring basin and boat lift areas at U.S. Coast Guard (USCG) Station Cape Disappointment, located within Baker Bay in Ilwaco, Washington.

Dredge approximately 10,000 cubic yards (cy) of sediment from the USCG Station Cape Disappointment boat basin by hydraulic or mechanical means to the indicated design depth of -10.0 feet Mean Lower Low Water (MLLW) plus 2 feet over depth allowance. The dredged sediment shall be permanently disposed of in either the Baker Bay Flow lane Disposal (BB-3) or Flow lane Area D, both within the Columbia River in Clatsop County, Oregon. All in-water work must be completed during the permitted in-water work window of 1 November 2022 through 28 February 2023 in order to minimize impacts to federally listed species and protected habitat.

1.02 BASIS FOR BIDS

A. Base Bid

Mobilize and demobilize personnel and equipment including the dredge, barge, scow, hydraulic pipeline, trucks, and other equipment necessary to complete the work. Prepare a Dredge Operations Plan, conduct pre-and post- dredge hydrographic surveys, and conduct pre-dredge and post-dredge eelgrass surveys.

Include all direct costs not associated with the dredging operation.

1) Mobilization & preparation of dredging and disposal site(s), and demobilization.

2) Dredging: Dredge the USCG Station Cape Disappointment mooring basin and boat lift areas by hydraulic or mechanical means to the indicated design depth of -10.0 feet MLLW plus 2 feet overdepth allowance. Transport the dredged sediment to the approved in-water site(s).

The removal, transport and disposal of dredged sediment shall be paid for at the established unit prices per cubic yard (cy) and based on the difference in volume between the pre- and post- dredge hydrographic surveys of the dredge prism. Payment for dredging, including disposal fees, shall not be made for dredging deeper than the allowable overdepth, dredging outside the authorized areas, or dredging and/or disposing of sediment in an unauthorized manner. The estimated unit price dredge quantity is 10,000cy. Per bathymetric data from September 2022, the volume to dredge to the design depth is 5,100cy and the volume to dredge the allowable overdepth is 4,150cy, for an estimated total of 9,250 cy.

3) Dredge Operations Plan: Submit a detailed dredge and disposal operations plan (DOP) of the entire dredging and dredge sediment disposal operation including a list of equipment, environmental controls, means of transport, and means and locations of intermediate storage or handling of dredge sediment. The DOP is required at least 25 days prior to the start of work, and must be approved by the regulatory agencies prior to the start of dredging activities.

4) Post-Dredge Project Report: Within 30 days after the completion of the project, the Contractor shall submit a post-dredge report to document the project’s execution. This report will be submitted to the regulatory agencies to satisfy permit requirements.

5) Pre-Dredge and Post-Dredge Hydrographic Surveys and Computations: Submit results of hydrographic surveys taken by a certified third party surveyor before and after dredging.

The hydrographic surveys and related drawings must include the dredged prism. The pre-dredge survey submittal is required no later than 25 days prior to dredging operations and the post-survey submittal is required prior to final acceptance of the completed work or 5 days after dredging is completed. The post-dredge survey will be utilized as a formal drawing for the record and payment, and will be included in the post-dredge report to be submitted to the regulatory agencies.

6) Pre- Dredge and Post-Dredge Eelgrass Surveys: The contractor shall conduct a pre-dredge and a post-dredge eelgrass survey and provide the reports of findings in a post-dredge biological report. The pre-dredge eelgrass survey shall be completed no later than 5 days prior to dredging. If eelgrass is identified within the dredge footprint, a post-dredge eelgrass survey shall be completed to verify the extent of effects of the dredging action on the eelgrass. The post-dredge eelgrass survey shall be completed within 30 days after dredging and/or during the next growing season. Payment will be made for costs associated with performing a pre dredge and a post-dredge eelgrass survey and producing the reports of findings at and near the project area. Unit of measure is two jobs.

1.03 LOCATION: The USCG Station Cape Disappointment is located at 322 Coast Guard Road, Ilwaco, Washington.

1.04 SITE INVESTIGATION: Investigate the site per FAR 52.236-3 to ascertain the general and local conditions, which can affect the work or its cost. Since the site is secured, prior arrangements for site visits should be made by contacting the Contracting Officer.

1.05 COVID-19: All current local, state and federal COVID-19

directives, ordinances, and/or protocols shall be complied with.

Per current DHS COVID-19 directives, all contractors shall be prepared to wear facemasks/coverings at all times on federal property if requested. Furthermore, proof of vaccination may be required.

1.06 KICK OFF MEETING: Within 10 days after award, the Contractor shall be available for a project kick-off meeting.

1.07 NOTIFICATION OF START AND COMPLETION OF WORK: The Contractor shall notify the Contracting Officer in writing five (5) business days in advance of the date he intends to commence work, and five

(5) business days prior to the date that work will be ready for final inspection.

1.08 CONTRACTOR'S DAILY REPORT: Complete Form 17-148 "Contractor's Daily Report to Construction Manager" every day there is any type of contractor or subcontractor activity (including equipment or material delivery) at the construction site. The contractor shall include daily calculations of estimated quantity of material dredged and disposed. The daily reports shall be compiled during the week and mailed to the USCG Project Manager at the close of business each Friday.

1.09 FINAL INSPECTION AND ACCEPTANCE: When work is complete and ready for final inspection, submit a written request for final inspection to the Contracting Officer at least 10 working days in advance of the date of final inspection. Final inspection will not be scheduled until all submittals have been approved. Note inspection and acceptance will be required separately for both dredging and disposal.

1.10 CONTRACTOR SECURITY REQUIREMENTS: The Contractor shall provide a list of all on-site personnel, including sub-contractors (including second and third-tier subcontractors) and suppliers, to the Contracting Officer. The contractor shall update this list when changes occur. Contractor personnel not listed may be denied access to the USCG facility. Contractor personnel will be restricted to designated working areas. Any personnel violating this policy may lose access to the USCG facility. Contractor personnel shall have photo identification at all times while working on Coast Guard facilities.

Contractor and delivery personnel may be required to present personal photo identification to gain access to a USCG installation. If identification does not indicate United States citizenship, USCG Security may require proof of the legal right to work in the United States. Contractor and delivery personnel also may be subjected to an immigration status and outstanding criminal warrants check.

The Real ID Act of 2005 established minimum security standards for license issuance and production and prohibits Federal agencies from accepting, for certain purposes, driver's licenses and identification cards from states not meeting the Act's minimum standards. Anyone requiring access to a military facility under this contract, to include subcontractors, who holds a driver's license from any state without approved licenses will be required to provide identification other than that driver's license to gain access. Government IDs annotated with “Federal Limits Apply” will not be accepted for access purposes.

It is the responsibility of the Contractor to ensure that their personnel have federally acceptable personal photo identification and comply with any other requirements for base access.

Contractors shall provide the Contracting Officer's Representative with 24 hours of advance notice of every delivery to the site (e.g., concrete, lumber, parts, etc.) and provide the company name, delivery person, and phone number of the firm(s) making deliveries. All vehicle access to government property require vehicle registration and proof of liability insurance, otherwise access to the USCG facility may be denied.

At least 7 days prior to commencing work the Contractor shall verify and ensure the USCG Security Office knows of the date and time the work will commence.

1.11 CONTINUITY OF FACILITIES OPERATION: Schedule work to minimize interference with the facilities normal operations. Notify the Contracting Officer and site contact 3 business days in advance of any shutdowns. Perform all on-site work, including deliveries, between the hours of 7:00 AM and 5:00 PM, Monday through Friday (Federal Holidays excluded), unless otherwise approved by the Contracting Officer and the Unit Commanding Officer.

1.12 CONTRACTOR USE OF PREMISES: The Contractor will be working on a military installation. Become familiar with and obey fire, traffic, and security regulations. Personnel shall not stray form the immediate area of work nor direct avenues of ingress and egress unless authorized in advance by the Contracting Officer.

Contractor shall coordinate dredging operations with the USCG Station Cape Disappointment Command to minimize disruption to the USCG operations and movement of USCG boats.

1.13 RECYCLING AND DISPOSAL OF REFUSE: Refuse, excess or waste materials resulting from construction operations shall become the property of the Contractor and shall be recycled and/or disposed of off Government property. All disposal shall be done in accordance with federal, state, and local laws and regulations.

1.14 HAZARDOUS MATERIAL IDENTIFICATION: Submit Safety Data Sheets (SDS) for any materials defined as hazardous under the most current revision of Federal Standard 313. One copy of each MSDS shall be submitted to the Contracting Officer’s Representative no later than the delivery date of the product. Two copies shall be submitted to the Contracting Officer.

1.15 SAFETY: During the execution of this contract, the Contractor shall conform to the rules and regulations as set forth by OSHA Safety and Health Standards, 29 CFR Part 1926 - Safety and Health Regulations for Construction. When the standards differ, the more restrictive standard shall apply. The contractor shall provide barriers, temporary fencing, trench covers, etc. wherever work could cause injury to workers, visitors, USCG personnel, or dependents. An Accident Prevention Plan shall be submitted in accordance with Section 01 35 29, paragraph 1.05.

1.16 CLEANUP: The Contractor shall keep the work area, including storage area, free from accumulations of waste materials on a daily basis and comply with all federal, state and local regulations pertaining to storage, transport and disposal of wastes. The Contractor shall not use the USCG waste disposal facilities including garbage cans, trash piles, or dumpsters. The Contractor shall remove all debris at the disposal site, which accumulated during the job.

1.17 TEMPORARY FACILITIES:

A. Storage: If needed, the Contractor may be provided a storage area in a location determined by the Contracting Officer. The Contractor shall be responsible for restoring the area to its original condition at the completion of work. The Contractor shall be responsible for protecting materials stockpiled against weather, damage, theft, and other risks of loss. The USCG assumes no responsibility for material or equipment left in the storage area.

B. Sanitary Facilities: There may not be toilet facilities available for Contractor use at the job site. The Contractor shall provide his own facilities, including hand washing facilities, in accordance with 29 CFR 1926, Subpart D, paragraph 1926.51 (c)(1) and (f)(1).]

C. Availability of Utility Services: No commercial utilities are available.

1.18 EXISTING UTILITIES: The existence of any other utility locations and cable crossings is unknown. The authorized dredge footprint and disposal site are not anticipated to contain underground utilities. The Contractor shall verify all utility and cable crossing locations prior to dredging.

1.19 DRAWINGS: Drawings to be used in conjunction with these

specifications are listed below. The drawings are the property of the Government and shall not be used for any purpose other than that contemplated by the specification. The work shall conform to the drawings listed below which form a part of these specifications.

Number Title

No.1 Condition Hydrographic Survey, USCG Station Cape

Disappointment, dated September 2022

1.19 ENVIRONMENTAL REGULATORY PERMITS: The Government has received permits and concurrences from the U.S. Army Corps of Engineers for compliance with Section 404 of the Clean Water Act (NWS 2021- 246), the Oregon Department of Environmental Quality and the Washington State Department of Ecology for compliance with Section 401 of the Clean Water Act (NWS-2021-246/ WQC20136), the Oregon Department of State Lands for compliance with the Coastal Zone Management Act, and the U.S. Fish and Wildlife Service and National Marine Fisheries Service for compliance with Section 7 of the Endangered Species Act, Marine Mammal Protection Act, and Magnuson- Stevens Fisheries Conservation and Management Act.

The Contractor shall comply with all requirements under terms and conditions set forth in the environmental permits and authorizations issued for this project. Copies of these environmental permits are provided with these specifications as Appendix A. The Contractor shall familiarize personnel with these and any other permits issued for this project and comply with all requirements under the terms and conditions set forth therein.

The contractor will be responsible for payment of fines resulting from violations of conditions set forth in the above permits.

1.20 SEDIMENT ANALYSIS: The material to be removed is material carried along the shoreline by natural currents, wind, and waves.

Sampling and analysis was completed for this site in 2021 according to the procedures specified by the Dredged Material Management Program (DMMP). Sediment analysis results indicated that the proposed dredged materials contain low chemical concentrations, high proportions of sand (96.7 percent) and low total organic carbon content (0.15 percent). The DMMP agencies determined that the project sediment was suitable for unconfined disposal at the DMMP nondispersive (or dispersive) open water disposal sites.

PART 2 PRODUCTS

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PART 3 EXECUTION

END OF SECTION

01 33 00 – SUBMITTALS PROCEDURES

1.01 GENERAL

A. Forward all submittals, except as stated elsewhere, to the Contracting Officer on CD-ROM or by email within 10 business days from date of award, unless indicated otherwise in this specification. Submittals shall be accompanied with the USCG furnished material submittal form in Microsoft Word Format.

Unless noted otherwise, all submittals shall be provided in an electronic image format. Provide these submittal images to the Contracting Officer, the Construction Manager, and the Contracting Officer's Representative (COR) simultaneously. If the electronic image is insufficient to ascertain submittal acceptability, the Contracting Officer may request a hard copy submittal. The Contracting Officer will e-mail approval or disapproval of submittals, within 10 calendar days after receipt.

B. The Contracting Officer Representative, Construction Manager and Project Manager will review all submittals for compliance with these specifications. The Contracting Officer shall approve submittals before acceptance.

C. Approval of submittals, and corrections or comments made during the review, do not relieve the Contractor from compliance with the requirements of the plans and specifications or permit coordination.

D. The schedule of submittals listed in the submittal register (Table-1) and in the individual sections are the submittals required for this contract. Unsolicited submittals may be returned to the Contractor without review.

1.02 CERTIFICATES OF COMPLIANCE: Certificates of compliance shall be signed by an authorized officer of the manufacturing company furnishing the material which states that the material being furnished meets all requirements of these specifications and referenced specifications.

1.03 DESIGN DRAWINGS: Design drawings shall be provided in AutoCAD 2020 file format and in Adobe Pdf. Drawings shall comply with the National CAD Standards for symbols and layers and shall also comply with USCG standards for font (Romans), font size (0.1 inch minimum height) and title block attributes.

Drawings shall be submitted on CD-ROM electronic media, with all photos and external reference drawings bound to their respective drawing. Plot styles and fonts used, other than Romans, shall also be included on the CD-ROM.

Drawings should include name and signature of lead engineer with stamp approval, dates of signature and dates of data collection.

PART 2 PRODUCTS

01 35 29 – HEALTH, SAFETY, AND EMERGENCY RESPONSE PROCEDURES

1.01 SECTION INCLUDES: This section applies to steps taken by the contractor to comply with the health and safety requirements listed herein. The Contractor shall comply with all applicable federal, state, and local laws and regulations. The ultimate responsibility for identifying applicable requirements and protecting contractor employees or sub-contractors rests with the primary contractor.

1.02 APPLICABLE PUBLICATIONS: The publications listed below

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

A. American National Standards Institute (ANSI):

Z359 Series Fall Protection Code, Version 2 (Z359.0-2007, Z359.1-2007, Z359.2- 2007, Z359.3-2007, Z359.4-2007, Z359.6-2009, Z359.12-2009, Z359.13- 2009, Z359.14-2012, and historical Z359.1-1992 (R1999)

B. Environmental Protection Agency (EPA) Regulations:

40 CFR 204 Noise Abatement Program for Construction Equipment

40 CFR 302.4 Designation of Hazardous Substances

C. U.S. Army Corps of Engineers (USACE):

EM 385-1-1 Safety and Health Requirements Manual

D. U.S. Department of Labor Occupation Safety and Health Administration (OSHA) Regulations:

29 CFR 1910.1200 Hazard Communication

29 CFR 1926.106 Working Over or Near Water

29 CFR 1926.453 Aerial Lifts (Construction Specific)

29 CFR 1926 Subpart M Fall Protection

29 CFR 1926 Subpart P Excavations

1.03 REFERENCE STATUTES: The statutes listed below form a part of this specification to the extent referenced.

Noise Control Act (NCA) (42 U.S.C. §§ 4901 to 4918)

1.04 DEFINITIONS

A. Sediment: Soil and other debris that has been eroded and transported by runoff water.

B. Solid Waste: Rubbish, debris and other discarded solid materials resulting from industrial, commercial, and agricultural operations, and from community activities.

Solid waste may also include non-sewage liquids.

C. Rubbish: A variety of combustible and noncombustible wastes such as paper, boxes, glass, crockery, metal, lumber, cans, and bones.

D. Debris: Includes combustible and noncombustible wastes, such as ashes, waste materials that result from construction or maintenance and repair work, leaves, and tree trimmings.

E. Chemical Wastes: Includes salts, acids, alkalines, herbicides, pesticides, and organic chemicals.

F. Sewage: Wastes characterized as domestic sanitary sewage.

G. Garbage: Refuse and scraps resulting from preparation, cooking, dispensing, and consumption of food.

H. Oily Waste: Includes petroleum products and bituminous materials.

I. Hazardous Material (HM): Chemicals defined by OSHA 29 CFR

1910.1200 and under the U.S. Department of Transportation (DOT) regulations (Title 49 CFR Parts 100 through 199) which are determined by the Secretary of Transportation to present risks to safety, health, and property during transportation. The DOT regulations include requirements for shipping papers, package marking, labeling, transport vehicle placarding, and training of personnel handling hazardous materials.

1.05 Accident Prevention: Submit a copy of your “Accident

prevention” or “Injury and Illness Prevention” in the dredge operations plan.

1.06 Mobile Equipment Operator List: A list of qualified

operators for all mobile equipment that will be brought onto the job site with employee name(s), qualifications and specific equipment to be operated shall be provided to the Contracting Officer prior to equipment operation.

(This includes forklifts, cranes, motorized lifting device, etc.). This is also to be included in the dredge operations plan.

1.07 NOISE: Make the maximum use of "low-noise-emission

products" as certified by EPA and described at 40 CFR Part

204. No blasting or use of explosives is permitted.

Comply with applicable portions of the Noise Control Act (NCA). The Contractor is responsible for complying with all other federal, state, and local noise control laws and regulations.

1.08 WORKING OVER OR NEAR WATER: When working over or near

water, comply with 29 CFR 1926.106.

PART 2 PRODUCTS

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01 35 43 – ENVIRONMENTAL PROCEDURES

PART 1 GENERAL

1.01 SECTION INCLUDES: This section applies to all necessary

steps taken by the Contractor to comply with the environmental protection requirements listed herein.

1.02 APPLICABLE PUBLICATIONS: The publications listed below

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

A. Environmental Protection Agency (EPA) Regulations:

40 CFR 122 National Pollution Discharge Elimination System

40 CFR 261 Identification and Listing of Hazardous Waste

1.03 REFERENCE STATUTES: The statutes listed below form a part of this specification to the extent referenced.

Clean Air Act (CAA) (42 U.S.C. §§ 7401 to 7642)

Clean Water Act (33 U.S.C. §§ 1251 to 1387)

Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) (42 U.S.C. §§ 9601 to 9675)

Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) (7 U.S.C. §§ 136 to 139y)

Federal Water Pollution Control Act (CWA) (33 U.S.C. §§ 1251)

Toxic Substance Control Act (TSCA) (15 U.S.C. §§ 2601 to 2654)

Resource Conservation and Recovery Act (RCRA) (42 U.S.C.

§§ 6901 to 6991i)

1.04 ENVIRONMENTAL PROTECTION REQUIREMENTS: Provide and

maintain environmental protection during the life of the Contract to control pollution or to correct conditions that develop during construction. Comply with all Federal, State, and local laws and regulations pertaining to water, air, soil, and noise pollution.

1.05 PROTECTION OF NATURAL RESOURCES

A. Permits: The Government has received permits and concurrences from the U.S. Army Corps of Engineers for compliance with Section 404 of the Clean Water Act (NWS 2021-246), the Oregon Department of Environmental Quality and the Washington State Department of Ecology for compliance with Section 401 of the Clean Water Act (NWS- 2021-246/ WQC20136), the Oregon Department of State Lands for compliance with the Coastal Zone Management Act, and the U.S. Fish and Wildlife Service and National Marine Fisheries Service for compliance with Section 7 of the Endangered Species Act, Marine Mammal Protection Act, and Magnuson- Stevens Fisheries Conservation and Management Act.

The Contractor shall comply with all requirements under terms and conditions set forth in the environmental permits and authorizations issued for this project. Copies of these environmental permits are provided with these specifications as Appendix A. The Contractor shall familiarize personnel with these and any other permits issued for this project and comply with all requirements under the terms and conditions set forth therein. The contractor will be responsible for payment of fines resulting from violations of conditions set forth in the above permits.

B. Preserve the natural resources within the project boundaries and outside the limits of permanent work performed under this Contract in their existing condition or restore to an equivalent or improved condition upon completion of the work. Repair or restore to original condition landscape features scarred or damaged by equipment or operations. Obtain Contracting Officer's approval before repair or restoration. Confine construction activities to areas defined by the work schedule, drawings, and specifications. Federal Acquisition Regulation clause 52.236-9 applies.

C. Eelgrass Vegetation: An eelgrass survey was conducted in June 2022 (Merkel & Associates 2022) to identify eelgrass within the vicinity of the proposed dredge area. The eelgrass survey identified approximately 319 square meters of eelgrass vegetation located to the south and along the shoreline of the Project Area. Eelgrass throughout the survey area was determined to be generally healthy, with light sedimentation and no evidence of disease (Merkel & Associates, Inc. 2022).

According to the this eelgrass survey, proposed dredging activities could directly disturb eelgrass along the shoreline and may also have the potential to indirectly disturb this patch of eelgrass with increased turbidity, which eelgrass is extremely sensitive to.

Eelgrass surveys shall be conducted prior to and post dredging (see Section 1.06, below). Vessel operators will not drop anchors/spuds within identified eelgrass beds.

Further, a 5 foot buffer around eelgrass beds will be maintained by vessel operators and dredge equipment. The Contractor shall deploy a full length turbidity curtain surrounding the work area to minimize the effects of suspected sediments to nearby eelgrass bed.

D. Except in areas indicated to be cleared, do not remove, cut, deface, injure, or destroy vegetation without special written permission from the Contracting Officer.

E. Construction equipment is to be kept in good repair, without leaks of hydraulic or lubricating fluids. If such leaks or drips do occur, they shall be cleaned up immediately. Drip pans shall be utilized when vehicles are parked. Confine equipment maintenance and/or repair to one location. Control runoff in this area to prevent contamination of soils and water.

F. At or before Contract completion, obliterate all signs of temporary construction facilities such as haul roads, work areas, structures, foundations of temporary structures, stockpiles of excess or waste materials, and all other vestiges of construction. Temporary roads, parking areas, staging areas, and similar temporary use areas where excavation has been accomplished shall be graded in conformance with surrounding areas. Restore all disturbed areas to their original condition.

G. For all work in or over water habitats, provide a debris boom. Take precautions to preclude construction materials from entering the water and immediately remove any material that enters the water in the work area. Report spills of any liquids into the water habitat and take steps to preclude spread or dissipation of spilled liquids. Contractor must have a spill response kit available.

1.06 EELGRASS PRE-DREDGE and POST-DREDGE SURVEYS: The

Contractor shall perform eelgrass surveys to determine the presence of eelgrass (Zostera marina and Zostera pacifica) within the dredge footprint and surrounding area, and to provide a comparative and quantitative assessment of the eelgrass communities within the area of potential effect prior to, and after dredging. The surveys shall be conducted in conformance with the requirements of both the California Eelgrass Mitigation Policy (CEMP) (NOAA 2014) and Eelgrass/Macroalgae Habitat Interim Survey Guidelines (WDFW 2008). The eelgrass surveys shall use at least a 45 meter buffer area outside of the dredge footprint perimeter. The report shall include calculated square meters of eelgrass in the project and buffer areas; a map that clearly show the location(s) of any eelgrass beds;

and a brief discussion of the survey methods, survey results relative to the survey parameters (spatial distribution, aerial extent, percent vegetated cover, and turion density), observation of invasive species (caulerpa sp.), and recommendations. Data recording sheets shall also be included in the report

Submit the name and qualifications of the Firm that will conduct the eelgrass surveys for approval prior to the kick off meeting. The pre-dredge eelgrass survey shall be performed no more than 5 days prior to the start of construction and shall record all presence of eelgrass (eelgrass density and eelgrass extent). Dredging cannot initiated until after the survey has been completed. A post-dredge eelgrass survey shall be completed within 30 days after completion of dredging, or during the appropriate growing season following dredging activities, and shall document the presence/absence of eelgrass and any potential effects from the dredging operations. The results of the eelgrass surveys shall be submitted in report form no later than 45 days after completion of work.

1.07 EROSION AND SEDIMENT CONTROL MEASURES:

A. Borrow pits are not permitted on Government property.

B. Provide necessary controls to prevent visible or measurable erosion from leaving the construction site.

C. Provide temporary protection for erodible soils.

Immediately protect side slopes and back slopes upon completion of rough grading. Plan and conduct all earthwork to minimize duration of exposure of unprotected soils.

1.08 CONTROL AND DISPOSAL OF WASTES: With the exception of

materials specifically indicated or specified to be salvaged for reuse in construction, or turned over to the

Government, all wastes and demolished materials become the contractor's property and shall be removed from the job site daily.

PART 2 PRODUCTS

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DIVISION 35 – WATERWAY AND MARINE CONSTRUCTION

35 20 23 - DREDGING

1.01 SECTION INCLUDES: This section applies to all work

required for dredging and disposal of the sediment.

Perform all operations necessary for the removal of all sediments to the required dimensions, the disposal thereof, and all operations thereto.

1.02 SUBMITTALS:

A. Dredge Operations Plan: Submit a detailed dredge and disposal operations plan (DOP) of the entire dredging and dredge sediment disposal operation. The DOP shall be a document that explains in writing the exact procedures to be followed and materials and equipment to be used by the Contractor to accomplish the required work. It shall include a list of equipment, environmental controls, means of transport, and means and locations of intermediate storage or handling of dredge sediment.

The DOP shall adhere to the permit requirements from the U.S. Army Corps of Engineers and shall include, at a minimum:

a) The Contractor’s proposed dredging method;

b) Detailed list of equipment to be used;

c) The pre- dredge hydrographic survey with volume

Calculations;

d) Procedures for conducting the pre- and post-dredge hydrographic surveys;

e) Procedures for marking the horizontal and vertical dredge limits;

f) Procedures for monitoring the progress and quantity of dredging during the execution of the work;

g) Identification of the disposal location(s);

h) Procedures for transporting the sediment to the disposal location;

i) Notice to Mariners; and

j) Solid debris management plan.

Provide plans and procedures should gale force winds or higher be forecast. Precautions shall include, but not be limited to, closing all openings, removing all loose materials, tools and equipment from exposed locations, anchoring and tying down barge, dredge, and/or pipeline.

This submittal is required 25 days prior to start of work and must be approved by the Corps prior to initiating the work.

B. Hydrographic Surveys: Submit results of hydrographic surveys taken before (pre) and after (post) dredging performed by a third party certified surveyor. The hydrographic surveys and related drawings must include the dredged prism. The pre-dredge survey submittal is required no later than 25 days prior to dredging operations and the post-survey submittal is required prior to final acceptance of the dredging work or 5 days after dredging is completed. More information provided in Section 1.06, below.

C. Dredge Volume Calculations: Submit results of actual gross volume of dredged sediment. Cover sheet shall be signed, dated, and sealed by licensed surveyor.

D. Post-Dredge Project Report: Within 30 days after the completion of the dredging, the Contractor shall submit a post-dredge report to document the project’s execution.

This report will be submitted to the regulatory agencies to satisfy permit requirements. At a minimum, the report will include calculated final dredging volume based on the pre and post dredge surveys, copies of all hydrographic surveys, maps of the dredging footprint, dates of commencement and completion of work, any noncompliance issues, required monitoring logs, environmental permitting compliance documentation, and the disposal location and operations of the dredged sediment.

1.03 ARTIFICIAL OBSTRUCTIONS: The USCG anticipates debris such as, but not limited to, metal bands, pallets, pieces of broken cable, rope, hose, and broken piles. The Government has no knowledge of existing wrecks or wreckages. Prior to dredging, the Contractor shall survey the dredge area and remove debris encountered. Debris removed from the dredge area shall be removed from the water. Explosives shall not be used under any circumstance. Disposal of debris shall be the responsibility of the Contractor and disposal shall be outside the limits of the USCG Station Cape Disappointment property.

1.04 QUANTITY OF MATERIAL: The total estimated amount of

material to be removed from within the specified limits, including side slopes, is 9,250 cubic yards. The estimated quantity for bidding purposes is 10,000cy. The quantity listed is an estimate only. Within the limits of available funds, complete the work specified whether the quantity involved is greater or less than that estimated. Should the total quantity of material exceed the estimated quantities, additional time and funding may be authorized to dredge up to 7,750cy yards in excess. For bidding purposes a contingency of only 3,750cy is included as Unite Price Line Item. Note that the total maximum authorized dredge volume, per environmental permits, is not to exceed 17,750cy.

A. Overdepth Dredging: Due to unavoidable inaccuracies in the dredging processes, different types of equipment, operator skill, and material composition, it is likely that material beyond the specified limits will have to be removed. The cost for the material removed beyond the specified limits, and disposal, although necessary to achieve the specified limits, will not be paid as a separate item, but should be accounted for in the cost to dredge the material within the specified limits. To cover unavoidable inaccuracies of dredging processes, removal of sediment to a depth of two feet below the elevation -10.0 feet MLLW depth specified and within the dredging limits will be allowed.

B. Side Slopes: Side slopes at the side limits of the dredge area shall be 3:1 (horizontal: vertical), unless otherwise recommended. Project the side slope from the dredged bottom elevation at the limits of the dredge area line outward until it intersects the existing bottom of the adjacent waterway. Dredging on side slopes shall follow, as closely as practicable, the lines indicated on the reference drawings.

C. Slides: In the event sliding occurs in any excavation after its completion but prior to its acceptance, the Contractor shall remove such portions of the slide at no additional cost to the Government. Particular attention shall be provided to the slope nearest to the boat haul out.

1.05 ENVIRONMENTAL PERMITS AND PROTECTION REQUIREMENTS: The

Contractor shall comply with conditions and requirements of Federal and State permits issued for the work that are included in Appendix A.

1.06 HYDROGRAHPIC SURVEYS: The Contractor shall provide

hydrographic surveys before and after dredging. The Contractor shall employ an independent, third party, surveyor licensed to perform such work by the State of Washington to perform the hydrographic surveys. The Contractor shall establish and provide all buoys, ranges, tide gauges, and other controls necessary to accomplish the work and facilitate inspection.

Hydrographic survey procedures (positioning modes, EPS calibration, accuracy requirements, depth measurements calibration, and data reduction, adjustment, processing and plotting, etc.) shall conform to industry standards similar to, or more stringent than, those found in Army Corps of Engineers Manual EM 1110-2-1003 for Hydrographic Surveying and published November 30, 2013 (http://www.publications.usace.army.mil/USACEPublications/ EngineerManuals.aspx). The contractor is responsible for installing any survey points required and shall include that information on the drawings. If necessary, a tide board shall be installed and will remain at the facility.

The survey shall locate the shoreline including mean higher high water (MHHW) and MLLW and show it on the cross section of the survey drawing. Locate all in-water structures outfalls, cable crossings or other man made features within or adjacent to the dredge footprint and include these structures within the hydrographic survey drawing. Drawings shall be provided in AutoCAD version 2020 file format (.dwg and .xyz) and in Adobe Pdf.

Additionally, ensure the drawings can be legibly printed on 8.5’x11’, as requested by regulatory agencies.

The drawings shall include areas to be dredged with over depth allowances; existing depths; cross sections, estimated quantities to be dredged for the project; and estimated quantities for over depth. Include the Corps permit number, dates of dredging commencement and completion, and actual quantities dredged (identify project depth and over depth quantities).

The drawings shall include, at a minimum, the following features:

a) Include the dredge footprint overlaid on aerial Imagery;

b) NAD83 coordinate grid ticks on the drawings;

c) Water depth corrected to MLLW;

d) Contour lines every one (1) foot;

e) Soundings every five (5) feet;

f) Elevations shall be determined to the nearest tenth of a foot at horizontal intervals of no more than 10 feet.

g) Contour lines for dredging limit should be bold or clearly marked;

h) Contour lines for dredging limit should be bold or clearly marked;

i) Shoreline and/or structural features (ie. Docks);

j) Dredge boundary coordinates legend;

k) Typical cross section(s) of the dredge footprint on the drawing;

l) Reference key map in the drawing depicting location of the Coast Guard unit;

m) Coast Guard Corps Permit Number (Corps No.

NWS2021-246)

n) Notes describing survey information (dates of survey, dates of dredging commence and completion, volume calculations to -10ft plus 1ft.

and 2 ft. over depth, and names of surveyors and licensed engineer);

o) Signature and stamp of licensed engineer.

The Contractor shall be responsible for addressing questions about survey methods, depths, and quantity calculations and shall allow for revision based on comments/edits from the USCG, prior to finalizing.

A. Pre-dredge Survey: A pre-dredge hydrographic shall be performed throughout the area to be dredged, including side slope of areas that extend upland. The Contractor shall take soundings throughout the dredge area on lines running transversely to the direction of the channel and/or the primary direction of boat movement. The soundings shall be corrected to mean lower low water (MLLW) and shall be indicated by the Contractor on the Government-provided copy of the contract drawings.

B. Cross Sections: The Contractor shall prepare cross-sections of the dredging area running transversely to the direction of the channel and/or the primary direction of boat movement at 25 foot (max) intervals. Each cross section shall show the mudline surface contours and the specified dredge limits and calculate the volume of material between the two, indicating the amount of material to be dredged. Submit cross-section and volume computations data together with the pre-dredge surveys.

C. Post-dredge Survey: After completion of all the dredging work, the Contractor shall resurvey the area as specified for the Pre-Dredge Survey and Cross-Section paragraphs and calculate the actual volume of material removed from within the specified limits. Submit survey plan, cross-sections, and computations to the Contracting Officer. A comparison between the Contractor’s Pre- and Post- dredge survey results shall be the basis for determining the final dredge volume to be paid at the contract unit price.

1.02 OBSTRUCTION OF WORK AREA: The USCG Station Cape

Disappointment is home to five search and rescue boats that support its mission. The station is also home to the National Motor Lifeboat School (NMLBS) which maintains five additional lifeboats. For this reason, the Contractor is to keep close communication with the Officer in Charge and COR to ensure appropriate safety zones are observed.

The Contractor will be required to conduct the work in such manner as to avoid obstruction to USCG operations and navigation. If the Contractor’s plant obstructs the navigable water, or endangers the passage of vessels, said plant shall be promptly moved on the approach of any vessel to such an extent as may be necessary to afford a practicable passage. Upon completion of the work, the Contractor shall promptly remove his plant, including pipeline, ranges, buoys, piles, pipeline, and/or other marks placed under the contract in navigable waters or onshore. The USCG will need access to the facilities during the work period and in some instances it may be an emergency. If required, the Contractor’s plant must have the ability to be maneuvered from the boat basin immediately following direction from the USCG.

PART 2 PRODUCTS

2.01 Not used.

PART 3 EXECUTION

3.01 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, boats, boatmen, laborers, and materials necessary for inspecting, supervising, and surveying the work.

3.02 CONDUCT OF DREDGING WORK

A. Interference with Navigation: Conduct dredging operations such that navigation through the boat basin and boat haul out by Coast Guard vessels is possible at all times and any obstruction to these areas is minimized to the greatest extent possible. Relocate and secure dredging equipment away from the channel and areas of the boat basin in use at the end of each work day. Minimize interference with the use of channels and passages. The Contracting Officer will direct the shifting or moving of dredger or the interruption of dredging operations to accommodate the movement of vessels and floating equipment, if necessary.

B. Lights: Each night, between sunset and sunrise and during periods of restricted visibility, provide lights for floating plants, scows, barges, pipelines, ranges, and markers. Also, provide lights for buoys that could endanger or obstruct navigation. If night work is proposed, lights must be made available from sunset to sunrise for the observation of dredging operations.

Lighting shall conform to the USCG requirements for visibility and color, and ensure lights point downward so as not to interfere with transient birds.

C. Ranges, Gages, and Lines: Furnish, set, and maintain ranges, buoys, and markers needed to design 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.

D. Plant: Maintain plant, scows, coamings, barges, pipelines, and associated equipment to meet the requirements of the work. Monitor and promptly repair leaks or breaks along the pipeline.

E. Dispose of Excavated Sediment: Provide for safe transportation and disposal of dredged sediments.

Transport and dispose of dredge sediment in the area designated for disposal of dredged sediment. The placement of dredged sediments in unauthorized places is forbidden.

Material that is placed in a location other than that specified shall not be paid for. The Contractor shall be required to remove such misplaced material at its expense and deposit it within the designated disposal area. Comply with the rules and regulations of local port and harbor governing authorities.

F. Method of Disposal: The sediment excavated from the boat basin shall be transported to the approved disposal site(s). The use of floating and submerged discharge lines is authorized but must be properly marked. The Contractor shall ensure compliance with the provision of this specification section and the regulatory permits. The

Contractor must also ensure minimal disturbance of the shoreline areas.

G. Salvaged Material: Anchors, chains, firearms, and other articles of value, which are brought to the surface during dredging operations, shall remain or become the property of the Government and shall be deposited on shore at a convenient location near the site of the work.

H. Working in the Vicinity of Structures: The Contractor shall exercise caution when working in the vicinity of structures adjacent to and within the piers and bulkheads.

Repair of any damage resulting from excessive or improper excavation of the basin shall be the responsibility of the Contractor. When dredging to obtain the required dimensions might endanger any structure, the Contracting Officer, upon request, may reduce the required excavation in the vicinity of such structure.

I. Plant Removal: Upon completion of the work, promptly remove plant, including ranges, buoys, piles, and other markers or obstructions.

3.03 DISPOSAL OPERATIONS:

A. Prevention of Damage: The dredged sediment shall be transported and deposited in such a manner as to ensure that no damage will occur to the adjacent docks, vessels, shore protection (rip rap), drainage systems, pipelines, utilities, structures, revetments, seawall, or other improvements.

B. Submerged: In the event that the Contractor elects to submerge a pipeline constructed of semi-buoyant material, such as PVC pipe or similar low density material, the Contractor shall securely anchor the pipeline to prevent the pipeline from lifting off the bottom under any conditions. The Contractor shall make daily underwater inspection of the submerged pipeline to ensure buoyancy has not loosened the anchors. The Contractor shall remove all anchors when the submerged pipeline is removed. The entire length of the pipeline shall be marked with signs, buoys, lights, and flags conforming to the Federal navigational regulations.

C. Floating: In the event that the Contractor elects to use a pipeline that does not rest on the bottom, it will be considered a floating pipeline and shall be visible on the surface, or lie partially submerged. Lights shall be installed on the floating pipeline. The lights shall be supported either by buoys or by temporary piling, provided by the Contractor and approved by the Contracting Officer.

3.04 MEASUREMENT: The Contractor shall provide hydrographic

surveys before and after dredging. These surveys shall be used to calculate the actual gross volume and design volume of dredged sediment removed. The total quantity of dredge sediment for which payment will be made will be by in-place (quantity) measurement in cubic yards by computing the difference in available sediment between the pre-dredge survey and the post-dredge survey.

Measurement and payment for this bid item will be considered complete and full compensation for the effort and cost to excavate the entire dredging pay areas to not less than the required dredging depths.

A. Method of measurement: The sediments removed will be measured by cubic yard in place, by means of soundings taken before and after dredging. The contract drawings represent existing conditions based on current available information, but will be verified and corrected by the Contractor, if necessary, by soundings taken before dredging. Prior to start of dredging operations, copies of the pre-dredge survey shall be submitted to the Contracting Officer. Upon completion of the dredge, the Contractor shall perform a post-dredge survey. This, along with the pre-dredge survey, shall be the sole source used to calculate the actual gross volume dredged sediment.

B. Extent of Dredge Surveys: The dredge surveys shall cover all the bottom area within the dredge limits of the bottom and side slope areas. Bottom elevation shall be determined to the nearest tenth of a foot at horizontal intervals of no more than 10 feet.

C. Surveys and Quantity Estimates during Progress of Work:

The Contractor shall conduct frequent progress survey to monitor and manage the contract dredge depths are met.

Contract dredge depth will be determined by soundings of sweepings taken behind the dredge as work progresses.