Heavy Civil GC/CM Services for MDCSO Chelan Wet Weather Storage Project

Location:	Washington
Posted:	Jun 24, 2026
Due:	Jul 8, 2026
Agency:	King County
Type of Government:	State & Local
Category:	C - Architect and Engineering Services - Construction
Solicitation No:	KC001590
Publication URL:	To access bid details, please log in.

Abstract: Alternative Procurements KC001590-2,1

Title

Solicitation Type

Alternative Procurements

Status

Active

Buyer

Leeann Snyder

lsnyder@kingcounty.gov

Synopsis

King County (County) requests final proposals from firms interested in providing Heavy Civil GC/CM Services for Mouth of Duwamish Combined Sewer Overflow (MDCSO) Chelan Wet Weather Storage Project. This is a project specific GC/CM. The Contractor may be responsible for multiple early work packages over the life of the GC/CM contract.

NOTE: Submittals for RFFP phase will only be accepted from Finalists invited to the solicitation.

Addendum Description

Addendum 1 has been issued.
Suppliers must acknowledge all addenda before submitting a proposal. If a supplier has already submitted a proposal, they MUST log into the E-Procurement Supplier Portal, acknowledge the addendum, and resubmit the proposal.

Attachments

KC001590-rffp-addendum-1.pdf (1.48 MB)

KC001590-rfp-addendum-2.pdf (797.42 KB)

KC001590-rfp-documents.zip (7.15 MB)

KC001590-addendum-1.pdf (1.12 MB)

KC001590-rffp-documents.zip (10.83 MB)


Open Date	6/24/26 03:32:02 PM
Close Date	7/8/26 01:30:59 PM
Posting Date	6/24/26

Additional Information


KC Solicitation NAICS Code(s)	237990;237110;541330
Small Business Requirements Apply?	Yes


Department	NATURAL RESOURCES AND PARKS
Division	WASTEWATER TREATMENT

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Heavy Civil GC/CM Services for MDCSO Chelan Wet Weather Storage Project

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