This Solicitation opportunity from Washington was posted on September 19, 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

001462,5State & Local

Submission Closed09/30/2025, 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

This contract involves the construction of the West Duwamish Combined Sewer Overflow (CSO) Control Facility and the West Duwamish Interceptor Diversion Structure, aimed at improving wastewater management and reducing overflows in the region. Additionally, the project includes modifications to the existing Terminal 115 Overflow Structure and upgrades to the mechanical, electrical, and instrumentation and control (I&C) systems at the West Michigan Street Regulator Station. The scope of work is substantial, with an estimated value ranging from 50 million to 100 million dollars, reflecting its complexity and importance for regional infrastructure resilience. The project is overseen by King County in Washington and is scheduled for solicitation with a response deadline of September 30, 2025. It is open to qualified entities, with a primary point of contact being Julie Thiele. The initiative aims to enhance the capacity and reliability of sewer overflow controls, contributing to environmental protection and improved public health in the area. More detailed information and updates can be accessed through the provided online link.

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 Addendum 2 for West Duwamish Wet Weather Storage

amendment

High

KC001462 Addendum 4 for West Duwamish Wet Weather Storage

amendment

High

KC001462 Addendum Number 5 - West Duwamish Wet Weather Storage

amendment

High

KC001462 Bidding Schedule Amendment 1

bidding-schedule

High

KC001462 Bidding Schedule for ITB

bidding-schedule

High

KC001462 Bidding Schedule Worksheet

bidding-schedule

High

KC001462 West Duwamish Wet Weather Storage Addendum 1

amendment

High

KC001462 West Duwamish Wet Weather Storage Addendum 3

amendment

High

KC001462 West Duwamish Wet Weather Storage ITB Volume 1

itb

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

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

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

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

PostedSep 19

Solicitation

Response DeadlineSep 30

Deadline has passed

Submission Closed

09/30/2025, 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.