APPENDIX C-SPECIFICATIONS-Dredging-Col River MSU Portland.pdf

DEPARTMENT OF HOMELAND SECURITY

UNITED STATES COAST GUARD

CIVIL ENGINEERING UNIT OAKLAND

OAKLAND, CALIFORNIA 94612-5203

PSN 21030930

SPECIFICATIONS

FOR

MAINTENANCE DREDGING

AT

COAST GUARD SECTOR COLUMBIA RIVER

[FORMERLY MARINE SECURITY UNIT (MSU)PORTLAND]

PORTLAND, OR

Civil Engineering Unit Oakland Initial Kiera J. Hollenbeck

PROJECT MANAGER

Constance M. Callahan

CHIEF, ENVIRONMENTAL MANAGEMENT BRANCH

Steven Osgood

TECHNICAL DIRECTOR

21 JAN 2026

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 11

01 35 43 – ENVIRONMENTAL PROCEDURES 14

DIVISION 35 – WATERWAY AND MARINE CONSTRUCTION 25

35 20 23 - DREDGING 25

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 berthing and approach areas to the east of the pier at U.S. Coast Guard (USCG) Sector Columbia River (formerly MSU Portland), located in Portland, Oregon. Dredge up to 600 cubic yards (cy) of sediment by mechanical or hydraulic means to the indicated design depth of -10.0 feet Mean Lower Low Water (MLLW) CRD plus 2 feet over depth allowance. Only the eastern side of the permitted ‘2024 dredge area’ shall be dredged (see section 35 20 23 and attached documents for more information). The dredge prism will need to be adjusted to ensure that riprap is not affected by dredging and that dredging can accomplish a -12 foot depth to reduce environmental compliance issues regarding unconfined aquatic exposure of unsuitable sediment (from mudline to -12 ft CRD). Dredged material shall be disposed of at Hillsboro Landfill located in Hillsboro, Oregon. Dredging and disposal must be conducted between July 1, 2025, and October 31, 2025. Barge operations must minimize impacts to local fishing vessels during transit from the dredge site to the disposal site.

The Contractor is responsible for complying with all permit conditions from the Army Corps of Engineers, U. S.

Environmental Protection Agency (EPA) Conditions for use of disposal sites, the National Marine Fisheries Service (NMFS) consultation requirements, and conditions required by the State of Oregon Water Quality Control Board and Oregon Coastal Commission.

1.02 BASIS FOR BIDS

Base Bid

1) Mobilize and demobilize personnel and equipment including the dredge, barge, scow, and other equipment necessary to complete the work. Prepare a Dredge Operations Plan, conduct pre-and post- dredge hydrographic surveys turbidity monitoring and reporting, and provide a post-

VYee Highlight

VYee Highlight dredge project report. Coordinate use of the disposal location (Hillsboro Landfill).

2) Dredging: Dredge the USCG Sector Columbia River mooring basin by clamshell/backhoe or hydraulic dredge to the indicated design depth of -10.0 feet MLLW plus 2 feet over-depth allowance. Dredging should include overdepth to reach a total depth of -12 feet. Transport the dredged sediment to the approved sediment placement facility.

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 600 cy. This is based upon the volume to dredge to the design depth plus the volume to dredge the allowable over-dredge depths as indicated by the hydrographic survey, dated 17 November 2022.

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 40 days prior to the start of work and must be approved by the regulatory agencies prior to the start of dredging activities.

4) Pre-Dredge Conference Call with Regulators: At least 14 days prior to dredging, a pre-dredge conference call with the contractor, USCG Representative, EPA Cleanup, ODEQ, Regulatory PM, and PSET is required. Dredging, sequencing, positioning, post-dredge confirmation testing, PDS management, cover material testing, and disposal will all need to be addressed as needed to assure the agencies that the dredge and disposal plans will be properly implemented.

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 (as adjusted for the eastern section of the ‘2024 dredged area’ as defined in the PSET documents, attached, and for riprap avoidance).

The pre-dredge survey submittal is required no later than 21 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) 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.

1.03 LOCATION: USCG Sector Columbia River (formerly MSU

Portland) is located in Portland, Oregon.

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 KICK OFF MEETING: Within 10 days after award, the

Contractor shall be available for a project kick-off meeting.

1.06 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.

1.07 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. Inspection and acceptance will be required separately for both dredging and disposal.

1.08 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 always have photo identification 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 requires vehicle registration and proof of liability insurance, otherwise access to the USCG facility may be denied.

Sector Columbia River employs the RAPIDGate Program for site access privileges. The contractor is encouraged to attain RAPIDGate credentials for employees to provide quicker entry onto Coast Guard facilities. All costs for registration in the RAPIDGate program will be at no additional cost to the Government. RAPIDGate contact information 1-877-727-4342.

1.09 CONTINUITY OF FACILITIES OPERATION: Schedule work to

minimize interference with the normal operations at the facility. 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.

1.10 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 Sector Columbia River and USCGC BLUEBELL command to minimize disruption to the USCG operations and movement of USCG boats through the basin and access channel. In addition, the Contractor shall minimize impact to local fisherman and avoid damage to fishing gear. Outreach to local fishing communities should be considered.

1.11 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 disposals shall be done in accordance with federal, state, and local laws and regulations.

1.12 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.

1.13 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.

1.14 CLEANUP: The Contractor shall keep the work area, including storage area, free from accumulations of waste materials daily 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.

1.15 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 are no 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.

1.16 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.

1.17 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 Conditional Hydrographic Survey, MSU

Portland, dated 17 November 2022.

1.19 ENVIRONMENTAL REGULATORY PERMITS: The contractor shall

comply with all permits received by the USCG to perform the work as detailed in this specification. More details about permit requirements can be found in Section 01 35 43

– ENVIRONMENTAL PROCEDURES.

1.20 SEDIMENT ANALYSIS: The material to be removed is material carried along the shoreline by natural currents, wind, and waves. Sampling and analysis were completed for this site in January 2024. Sediment analysis results indicated that the proposed dredged materials are unsuitable for in-water disposal and that some areas of the dredge prism are unsuitable for unconfined aquatic exposure. Disposal of dredge materials must be completed at an upland facility (Hillsboro Landfill) and dredge depth for the BLUEBELL mooring area must be complete to at least -12ft to ensure no post-dredge surface cover is required.

PART 2 PRODUCTS

Not Used

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 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 PDF 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

.xyz 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 in electronic media form, with all photos and external reference drawings bound to their respective drawing. Plot styles and fonts used, other than Romans, shall also be included.

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

PART 2 PRODUCTS

Not Used

TABLE 1

CEU OAKLAND SUBMITTAL REGISTER

PSN:

21030930

CONTRACT NO.:

TBD

PROJECT TITLE AND LOCATION:

Maintenance Dredging at MSU Portland Portland, Oregon

Submittal Reference Location ACTION DATE

NO.

SPEC.

SECTION

SECTION PAGE DESCRIPTION OF SUBMITTAL DATE REQUIRED DISAPPROVED APPROVED

01 01 10 00 1.05 3 Kick Off Meeting 10 days after award

02 01 10 00 1.08 3 Contractor Security Requirements 10 days after award

03 01 10 00 1.02A 25 Contractor’s Daily Report Daily

04 35 20 23 1.02B 25 Dredge Operations Plan (including Solid Debris Management Plan and Accident and Spill Prevention Plan)

NLT 21 days pre-dredge

05 35 20 23 1.02C 27 Solid Debris Management Plan NLT 21 days pre-dredge

05 35 20 23 1.02D 27 Post Dredge Project Report NLT 30 days post-dredge

06 35 20 23 1.02E 28 Pre-Dredge Hydrographic Survey NLT 21 days pre-dredge

07 35 20 23 1.02E 28 Post-Dredge Hydrographic Survey NLT 5 days post-dredge

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

Not Used

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 USCG has obtained permits from the U.S. Army Corps of Engineers for compliance with Section 404 of the Clean Water Act (NWP-2013-172-1), the Oregon Department of Environmental Quality for compliance with Section 401 of the Clean Water Act(2013-172-1), the Oregon Department of Land Conservation and Development for compliance with the Coastal Zone Management Act, the U.S. Fish and Wildlife Service and National Marine Fisheries Service (WCRO-2023-00130) for compliance with Section 7 of the Endangered Species Act, and Magnuson- Stevens Fisheries Conservation and Management Act. Copies of the environmental permits are be provided as an Attachment.

The terms and conditions, best management practices and avoidance measures includes, but is not limited to, turbidity monitoring, solid debris management, spill prevention plans, etc.

The Contractor shall comply with all requirements under terms and conditions set forth in the environmental permits and authorizations issued for this project. 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 October 2022 (Merkel & Associates 2022) to identify eelgrass within the vicinity of the proposed dredge area.

The eelgrass survey indicated the absence of eelgrass in the survey area (Merkle & Associates 2022).

1.06 TURBIDITY MONITORING: Turbidity monitoring must be

conducted and recorded as described in the DEQ 401 WQC, 2013-172-1 permit (attached). Monitoring must occur at two-hour intervals each day during daylight hours when in-water work is being conducted, including while dewatering or work area isolation measures are in place.

A properly calibrated turbidimeter is required.

A. Representative Background Point: Take and record a turbidity measurement every two hours during in-water work at an undisturbed area 100 & 600 feet up-current from the in-water disturbance, to establish background turbidity levels. The background turbidity, location, date, tidal stage, and time must be recorded immediately prior to monitoring down current at the compliance point described below.

B. Compliance Point: Monitor every two hours, 100 & 300 feet down current from the disturbance, at approximately mid-depth of the waterbody and within any visible plume. The turbidity, location, date, tidal-stage (if applicable) and time must be recorded for each measurement.

C. Point Comparison: Compare turbidity monitoring results from compliance points to the background levels taken during each two-hour monitoring interval. Compare against the exceedance chart provided below:

D. Exceedance Requirements: If an exceedance over the background level occurs, the contractor shall attempt to modify the dredge activity to reduce turbidity levels.

If exceedance over the background level continues after the second monitoring interval, the dredge must stop, and the COR shall be notified. If, however, turbidity levels return to background at or after second monitoring level due to implementation of best management practices or natural attenuation, work may continue with appropriate monitoring as above. If an exceedance occurs at 50 NTU or more over background, 30 NTU over background of two hours, or 5-29 NTU over background for eight hours, the activity must stop immediately for the remainder of that 24-hour period.

E. Weather: If the weather conditions are unsuitable for monitoring (heavy fog, ice/snow, excessive winds, rough water, etc.) then operations must cease until conditions are suitable for monitoring.

F. Reporting: Record all turbidity monitoring in daily logs to include calibration documentation, background NTUs, compliance point NTUs, comparison of the points in NTUs, and location, date, time, and tidal stage (if applicable) for each reading. If exceedances occur, include a narrative with subsequent monitoring, actions taken, and the effectiveness of actions.

1.07 BEST MANAGEMENT PRACTICES FOR DREDGING: The following

list are BMPs that have been included in the permit applications and have been agreed upon by the USCG and regulatory agencies. The Contractor shall implement each of the BMPs to comply and avoid impacts to natural resources.

Seasonal restrictions: dredging will be conducted during the ODFW lower Willamette River work window of July 1 to October 31.

Dredge materials will be disposed of at a permitted and approved upland location.

Dredge area will be dredged to a minimum depth of -12ft to reduce risk of unconfined aquatic exposure of contaminated sediment. If at any point the contractor believes an area within the dredge prism cannot be dredged to -12ft, the COR shall be notified immediately.

Dredging materials will be conducted from a barge to avoid land-based activities that could affect riparian communities.

All dredging will be completed in accordance with permit requirements.

The maintenance dredge will not disturb any riprap in the area.

Dredging and placement operations will cease if oil sheens, or other indicators of contamination are observed.

Turbidity will be monitored downstream of the dredging areas as required in the Oregon Department of Environmental Quality (ODEQ) 401 Water Quality Certification and the NMFS Biological Opinion.

Floating silt curtains will be deployed where necessary.

The contractor will visually inspect in-water dredging and fueling equipment (hoses, drums, valves, and fittings) daily and repair or clean all leaks and hazardous materials before conducting in-water work. At no time will oil, chemicals, fuels, or other deleterious waste materials be allowed to enter the waterbody.

Hazardous fuels and materials will be stored at least 150 feet from the waterbody and contained within an isolated zone.

The contractor will assign a designated member of the project team to observe dredging work and will curtail operations in the event oil sheens or other indicators of hazardous contamination are observed.

If oil sheens or other indicators of hazardous contamination are observed, as spill response protocol will be deployed to stop operations, contain the spill and clean up the observed contamination from the aquatic environment.

Floating containment and absorbant booms will be maintained onsite for the duration of the project and deployed in the event that any sheen of floating debris is detected during operations.

The in-water work will be sequenced to minimize the extent and duration of in-water disturbances of sediments and associated hazardous contaminants.

All foreign materials, refuse, and waste from the project area will be removed from the site and disposed of properly at an upland landfill.

In the event that dredging operations cause water quality issues which result in distressed or dying fish, the operator will cease work, take corrective actions to prevent further damage, and notify ODEQ, ODFW, USACE, and NMFS.

In the event of a hazardous spill, the Oregon Emergency Response Services will be contacted to report the spill, execute containment measures, and implement cleanup efforts.

Waste that accompanies the dredged sediment will be tested and, if necessary, treated as hazardous waste.

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

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.

When working in water, hydraulic equipment shall be operated with vegetable oil based hydraulic fluids, not petroleum based.

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.

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.

No debris shall be disposed of at the disposal site.

All debris must be removed from sediment and disposed of per the EPA’s guidance included in the attached permits.

Vessel operators will follow designated speed zones to and from the project area.

The potential for grounding will be limited by controlling contractor vessel draft and movements.

During transport and handling of sediment, containment measures will be used to minimize spillage. The USCG will require the contractor to conduct a surface debris survey prior to dredging.

If needed during offloading, metal spill aprons, upland spill control curbing and collection systems, and other spill control measures will be implemented. If a bucket is used, a dribble apron will be used.

The contractor will use a GPS unit to ensure that material is removed from the correct locations.

The contractor will not be allowed to excavate beyond the maximum depth.

No bottom stockpiling or multiple bites of the clamshell bucket will be allowed.

Over-dredging at the base of a slope will not occur.

If mechanical dredging is employed, the dredge bucket will not be overfilled. The dredge bucket will swing directly to the barge after it breaks the water surface using the minimal swing distance.

The dump scow will be filled to no more than 80 percent capacity to prevent spillage during transport.

Although not anticipated to be necessary, surface booms, oil-absorbent pads, and similar materials will be onsite to contain any sheen that may occur on the surface of the water during dredging.

A debris boom will be installed during in-water construction. Any debris accidentally discharged into the water will be collected, transported to, and disposed of, at an appropriate upland disposal site, or recycled, if appropriate.

The contractor shall utilize only clean construction materials suitable for use in the aquatic environment.

The contractor shall ensure no debris, soil, silt, sand, sawdust, rubbish, cement, or concrete washings thereof, oil or petroleum products, from construction shall be allowed to enter or be placed where it may be washed by rainfall or runoff into waters of the U.S.

Upon completion of the project the contractor shall completely remove all excess material or debris from the work area and recycle or dispose of these materials in an appropriate upland location.

No re-fueling of equipment shall occur where it could enter waters of the U.S.

Prior to dredging, a dredging and disposal management plan will be prepared by the contractor that describes BMPs that comply with local, state, and federal regulations and to address the following, should they occur:

o Bottom scour from propeller wash.

o Loss of submerged or emergent vegetation from propeller wash and/or excessive wake.

o Accidental material spillage.

o Sediment and benthic community disturbance from accidental or intentional barge grounding or deployment of barge spuds or anchors; and hazardous material spills.

Dredging will be completed to a stable slope to maintain the integrity of the riprap-armored banks.

Employ the following techniques to minimize sediment disturbance and distribution through the water column:

o Sequence or phase work activities to minimize the extent and duration of in-water disturbances.

o Employ an experienced equipment operator.

o Implement bucket control techniques, such as:

Do not overfill the bucket.

Close the bucket as slowly as possible on the bottom.

Pause before hoisting the bucket off the bottom to allow any overage to settle near the bottom.

Hoist load very slowly.

If dewatering is permissible, pause bucket at water surface to minimize distance of discharge.

"Slam" open the bucket after material is dumped on a barge to dislodge any additional material that is potentially clinging to the bucket.

Ensure that all material has dumped into the barge from the bucket before returning for another bite.

Do not dump partial or full buckets of material back into the wetted stream.

o Implement suction dredge control techniques, such as:

Operate with the intake head at or below the surface of the sediments being removed during all periods of active dredging.

Slow cutter head rotation or lessen horsepower.

Slow swing arm speed.

Clean out slurry by pumping in river water before shutting down rather than purging.

If purging becomes necessary, raise intake line no more than 3 feet from the bottom.

Dredging of holes or sumps below maximum depth and subsequent redistribution of sediment by dredging, dragging, or other means is prohibited.

All anthropogenic debris greater than 1 foot in dimension must be removed from dredged sediments prior to in-water disposal and transported to an appropriate upland disposal site.

1.08 BEST MANAGEMENT PRACTICES FOR TRANSPORT OF DREDGE

MATERIAL:

Barges will not be filled beyond 24-inch freeboard and will be sealed to prevent leakage.

To minimize spillage at the transload facility between the bucket and the watertight swell removal barges, cantilevered spill aprons will be attached to the barges to direct spilled material back into the barges and away from the river.

Disposable spill aprons will be utilized at the transload facility and disposed of with any spillage.

Tires/truck bed ledges where spill material has accumulated will be brushed after any transfer spillage onto the spill apron for disposal before the truck leaves the transload area.

Transload facility will be paved, hard curbed, and stormwater collected and treated before discharge to any receiving waters.

Haul trucks transporting material for upland disposal will be covered.

Haul trucks will be decontaminated before being put to other uses.

1.09 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.

1.10 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

Not Used

PART 3 EXECUTION

DIVISION 35 – WATERWAY AND MARINE CONSTRUCTION

35 20 23 - DREDGING

PART 1 GENERAL

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. 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 emailed to the USCG Project Manager at the close of business each Friday.

B. 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. This submittal is required 21 days prior to start of work and must be approved by the Corps prior to initiating the work.

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

1) Corps Permit Number.

2) Dredge Episode Number.

3) Date of last dredging episode and depth.

4) Copy of the dredging contract/scope.

5) Name and phone number of dredge contractor’s representative on site.

6) Dredging start and completion dates.

7) Names of vessel & dump scow numbers or identification.

8) Detailed list of equipment to be used.

9) Bin or barge capacities.

10) Identification of work as maintenance dredging.

11) Identification of the disposal location(s).

12) Procedures for conducting the pre- and post-dredge hydrographic surveys.

13) The pre- dredge hydrographic survey with volume calculations, dredge design depth, and typical cross section including overdepth.

14) Discussion of proposed dredging procedures (with detailed drawings or specifications of the grid or centrifugal pump system) and procedures for monitoring the progress and quantity of dredging during the execution of the work.

15) Procedures for marking the horizontal and vertical dredge limits and controls being established to ensure that dredging operations occur within the limits defined by the channel dimensions and typical channel section (horizontal and vertical positioning systems must comply with USACE permit).

16) Controls being established to ensure that disposal of the dredge material at the disposal site is at the assigned location and depth (horizontal and vertical positioning systems must comply with USACE permit) and procedures for transporting the sediment to the disposal location.

17) Method of determining electronic positioning of dredge or dump scow during entire dredging operation at dredge site, disposal site, and enroute to and from the dredge site.

18) Notice to Mariners.

19) Solid debris management plan.

20) Accident/Spill Prevention and Control Plan.

21) Mobile Equipment Operator List.

22) Any special conditions listed in the USACE permit.

C. Solid Debris Management Plan: Submit a plan with describes measures to ensure that solid debris generated during any authorized dredging, demolition, or construction operation is retained and properly disposed in areas not under USACE jurisdiction. The solid debris management plan shall be submitted in the Dredge Operations Plan, no later than 21 days before dredging.

At a minimum, the plan shall include the following:

1) Source and expected type of debris.

2) Debris retrieval method.

3) USACE permit number and dredge episode number.

4) Disposal method and site.

5) Schedule of disposal operations.

6) Debris containment method to be used if floatable debris is involved.

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. The Post-Dredge Report shall include:

1) Corps permit number.

2) Dredge episode number.

3) Dates of dredging commencement and completion.

4) Method of dredging.

5) Total dredged area (acres).

6) Pre and post dredge hydrographic surveys with accuracy to one-tenth foot that delineates and labels the areas dredged and the dredge depths.

7) Actual quantities dredged to the design depth, and actual quantities dredged to the overdepth limit.

Include calculations used to determine the volume difference (cubic yards) between the pre-dredge and post-dredge surveys and explain any variation in quantities greater than 15% beyond the estimated quantities or dredging deeper than is permitted. All surveys shall be accomplished by a licensed surveyor and signed by the contractor to certify their accuracy.

8) Dredge Volume Calculations: Results of actual gross volume of dredged sediment. Calculations shall be signed, dated, and sealed by licensed surveyor.

9) Turbidity monitoring information and results.

10) A description of any deviations from the authorized work and a summary of debris management.

11) Biological observations.

12) Final Disposal Report, to include:

(a) Dates of Disposal.

(b) Volume of material disposed.

(c) Debris reporting and monitoring results.

(d) Electronic disposal track monitoring maps and data in a Geographic Information System (GIS) format.

E. Hydrographic 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 Oregon 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. The surveyed area shall only include the eastern section of the 2024 dredge prism as described in the PSET and other permitting documents and shown below:

Additionally, hydrographic survey should consider the location of riprap and ensure that dredging does not occur in areas where riprap will impede dredging to -12 feet.

If riprap is present within dredge area, contractor may adjust the dredge prism to exclude riprap. The 2016 post-dredge report is attached to show where riprap was encountered and how the dredge plan was altered to account for it. The coordinates for the dredge area highlighted are as follows (from the top left corner, moving clockwise): 45°34.24190', -122°43.37043'; 45°34.23753', - 122°43.36220'; 45°34.22470', -122°43.37741' and 45°34.22921', -122°43.38475'.

1) Pre-dredge Survey: A pre-dredge hydrographic shall be performed no later than 21 days prior to dredging. The survey shall encompass the area to be dredged (dredge footprint), 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.

2) Post-dredge Survey: No later than 5 (five) days 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.

3) Requirements: 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/USACEPublicati ons/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 2024 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 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.

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

(i) Dredge boundary…