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Project update

August, 2019 - Construction of Conveyance Pipes 

You may remember back in February when we shared that South River Street will be closed to complete work in that area. Work was postponed and now has begun. South River Street underneath the First Avenue Bridge will be closed for approximately three months. Crews will complete necessary work to build the conveyance pipes, including surveying in the roadway, moving utilities, trenching, placing pipe, and backfilling. A detour route for trucks and commuters is shown in blue on the map below. The detour uses Occidental Avenue South and South Michigan Street. View project update .

190801_road-closure

Join us this summer at community events!

Beyond the project sites, King County remains committed to working with the Georgetown neighborhood. This summer, King County will be out in the community to share information about construction activities and have conversations with community members.

Questions? Come see us at our booth!

King County’s Georgetown Wet Weather Treatment Station celebrates Platinum Achievement Award for Sustainability

King County’s Georgetown Wet Weather Treatment Station earned the coveted “Platinum” rating from the Institute for Sustainable Infrastructure’s Envision rating system. This is the first Platinum-awarded Envision project in Washington and recognizes the County’s commitment to sustainable communities and the environment. View news release.

Project description

Rendering of Georgetown Wet Weather Treatment SystemSite of future Georgetown Wet Weather Treatment Station at the corner of 4th Avenue South and South Michigan Street. (View other wet weather treatment facilities.)

The Georgetown Wet Weather Treatment Station Project includes the construction of a combined sewer overflow (CSO) wet weather treatment station between the Brandon Street and South Michigan Street Regulator Stations, related pipes and a new outfall structure to release the treated water into the Duwamish River. When constructed, the station can treat up to 70 million gallons of combined rain and wastewater a day that would otherwise have discharged directly to the Duwamish without treatment during storm events.

This project will help clean up the Duwamish River by treating stormwater runoff and sewage during heavy rains. Right now, heavy rains can fill up our sewer pipes, sending polluted runoff and sewage through a pipe into the river. King County began on-site work in April 2017 and expects to finish construction in 2022.

Wet Weather Treatment StationWet weather treatment stations clean overflows locally on-site during heavy rain storms.

Schedule

Through a competitive process, King County awarded the construction contracts to three separate contractors.

In spring 2018, King County’s contractor Flatiron West, Inc. started treatment station construction. In the summer of 2018, Pacific Pile and Marine began the construction on the new outfall structure and in the fall of 2018, JW Fowler Company also began preparation work to construct the conveyance pipeline which will connect the treatment station to the outfall.

project timeline

phases_graphic_construction

Contact us

Construction hotline:
206-205-9286
 

Contact Bibiana Ocheke-Ameh at:

 bibiana.ocheke-ameh
@kingcounty.gov

 206-477-5604
 Feedback form

Sign up for email or text updates on the public involvement page.

King County partnered with Nature Consortium and Seattle Public Schools to teach 5th graders at Maple Elementary about water conservation and create art for the construction fence. View more project videos in the Library.

Project location

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Back to the capital projects overview map .

aerial map of the project area