Privately Funded
Bidding Soon
Documents Available
Publicly Funded
Addenda Available
Post-Bid
Published December 15, 2025 at 7:00 PM
Updated December 16, 2025
Site work and new construction of a water / sewer project in Seattle, Washington. Working plans call for the construction of a water / sewer project; and for site work for a water / sewer project.
As of December 15, 2025, this project has not yet been awarded. A timeline for the award has not yet been established. The WWTS is a new treatment facility to treat combined sewer overflows (CSOs) prior to discharge through a new outfall into the east waterway at the mouth of the Duwamish River. The project will construct an equalization basin(s), screening, pumps, ballasted sedimentation technology for solids removal, chlorine disinfection system utilizing ultraviolet light (UV) disinfection, solids storage, and instrumentation and controls. The scope includes the demolition of existing structures and foundations, construction of a below-grade 4 million-gallon (MG) equalization basin, shoring and excavation work, and soil management (including disposal of contaminated soils, ground improvements, and tremie slabs). The scope also includes influent piping, screening and pumping, construction of a vendor supplied ballasted sedimentation UV disinfection treatment system, solids handling, odor control systems, and site surface improvements. Buyer Melissa Jordan Email mejordan@kingcounty.gov QA date - 10-9-2025
Final Planning
Water / Sewer
$1,035,000,000.00
Public - County
New Construction, Site Work
Documents for this project are exclusively Specifications. If Plans become available, we will add them here.
17
Trades Specified
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