This Solicitation opportunity from Washington was posted on August 12, 2025. The submission period has ended. Browse the details below for market research, or find similar active opportunities.

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West Duwamish Wet Weather Storage

Closed

001462,1State & Local

Submission Closed09/16/2025, 12:00:00 AM UTC

Contract Overview

Solicitation details, issuing organization, response deadlines, documents, and interested companies for this government contract opportunity.

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NAICS: 221320

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Solicitation # FA448627Q0002

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FA4486 765 Abs Conf

POSTED

16 days ago

DEADLINE

in 26 days

AI Contract Overview

The West Duwamish Wet Weather Storage project involves the construction of a combined sewer overflow control facility and a diversion structure for the West Duwamish Interceptor, aimed at managing stormwater and sewage flows more effectively. The scope includes modifications to the existing Terminal 115 Overflow Structure and upgrades to the mechanical, electrical, and instrumentation and control systems at the West Michigan Street Regulator Station. The contract, issued by King County in Washington, has a budget range between 50 million and 80 million dollars and is scheduled for solicitation with a response deadline of September 16, 2025. The project is part of efforts to improve wastewater infrastructure and reduce environmental impacts associated with combined sewer overflows. Interested parties can contact Julie Thiele via email for further details, and the project is categorized under NAICS code 221320, indicating its focus on water supply and irrigation systems. The contract is open to eligible entities, and the procurement process emphasizes technical expertise in large-scale civil and utility infrastructure projects. The initiative reflects King County’s commitment to enhancing water quality and infrastructure resilience in the region, with the potential for significant improvements to stormwater management and environmental protection in the West Duwamish area.

General Info

Agency

Washington → King County

NAICS

221320 - Sewage Treatment Facilities

Place of Performance

WA, USA

Set-Aside

NONE

Documents

First Material Modification to 2013 Consent Decree - King County CSO Control

modification

High

KC001462 Bidding Schedule Amendment 1

bidding-schedule

High

KC001462 Bidding Schedule for ITB

bidding-schedule

High

KC001462 West Duwamish Wet Weather Storage Addendum 1

amendment

High

KC001462 West Duwamish Wet Weather Storage - Geotechnical Data Report

specifications

High

KC001462 West Duwamish Wet Weather Storage ITB Volume 1

itb

High

KC001462 West Duwamish Wet Weather Storage - Volume 3

specifications

High

KC001462 West Duwamish Wet Weather Storage - Volume 4 Standard Details

268 pages · specifications

High

KC001484 Professional Services Agreement for Stormwater Retrofits Planning

contract-document

High

King County PLC and OIT Installation and Programming Requirements May 2015

specifications

High

King County West Duwamish Wet Weather Storage Project Archaeological Resources Monitoring and Inadvertent Discovery Plan July 2024

sow

High

RFP KC001484 Planning Services for Stormwater Retrofits Project

rfp

High

RFP KC001484 Planning Services for the CBP3 Stormwater Retrofit Project PAC

pac

High

RFP KC Proposal Cover Sheet

rfp

High

Seattle City Light Distribution Engineering Customer Drawing Work Order 2213720

construction-notes

High

West Michigan Street Regulator Station Main Control Panel PLC Programming

sow

High

Consent Decree - King County Clean Water Act Case 2:13-cv-677

consent-decree

Low

Pole Hold Form P.271225 Lumen Pole ID A1682903

pole-hold-form

Low

Record Drawing of 15-inch City of Seattle Sewer Pipe

other

Low

Record Drawings of Existing T115 Overflow Structure and West Duwamish Interceptor

other

Low

Record Drawings West Duwamish Interceptor 8-inch City of Seattle

other

Low

Remedial Investigation Report for Terminal 115 Plant 1 Parcel A

remedial-investigation-report

Low

Seattle City Light Distribution Engineering Customer Drawing (WO 2405203)

1 page · specifications

Low

Seattle City Light Pole ID 1359049 Pole Hold Form

pole-hold-form

Low

Seattle City Light Pole ID 1359333 Pole Hold Form

pole-hold-form

Low

Seattle City Light Pole ID 1359339 Pole Hold Form

pole-hold-form

Low

Stormwater Community Based Public-Private Partnership Feasibility Assessment Manual

other

Low

West Duwamish CSO Control Project Critical Areas Report Final Revision 3

report

Low

West Duwamish Interceptor and West Michigan Street Regulator Record Drawings June 1965

record-drawings

Low

West Michigan Street Regulator Station Facility Record Drawings April 2018

record-drawings

Low

West Michigan Street Regulator Station Metrotel RTU Project Tag Listing

other

Low

KC001462-itb-vol-2.pdf

KC001462-itb-vol-6.pdf

KC001462-itb-vol-7.pdf

REF - 10. Record drawing of the existing 48-inch-diameter City of Seattle drain pipe (Sheet 25).pdf

REF - 11. Record drawing of existing utilities (gas) in vicinity of project (reference sheet number G31).pdf

REF - 12. Record drawing of the existing 24-inch-diameter City of Seattle drain pipe and maintenance hole .pdf

REF - 21. Record drawing of existing irrigation (782-187-L7).pdf

REF - 22. Volume 6 of 7 Contract Drawings (Unprotected PDF).pdf

REF - 23. Volume 7 of 7 Contract Drawings (Unprotected PDF).pdf

REF - 7. Record drawing of existing drainage (biofiltration swales, ditches, and culverts).pdf

AI Contract Breakdown

Uniform Contract Format

Timeline

PhaseClosed

PostedAug 12

Solicitation

Response DeadlineSep 16

Deadline has passed

Submission Closed

09/16/2025, 12:00:00 AM UTC

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Organization & Contact Information

AgencyWashington → King County

Contacts1 person available

OfficeN/A

Organization / AgencyWashington → King County

Office AddressN/A

Contacts

Julie Thiele

contact@example.gov

Full Description

Construct West Duwamish Combined Sewer Overflow (CSO) Control Facility and West Duwamish Interceptor Diversion Structure, modify existing Terminal 115 Overflow Structure and make improvements to existing mechanical, electrical, and instrumentation and control (I&C) systems to existing West Michigan Street Regulator Station.