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Wastewater Treatment Division (WTD) operations and projects

WTD operations staff remain on the job 24/7 to ensure the region’s wastewater treatment service continues. More information on how to report a problem you believe may be related to the County’s wastewater treatment system is available here: https://www.kingcounty.gov/depts/dnrp/wtd/response.aspx

The King County Wastewater Treatment Division remains committed to sharing information and gathering feedback from community members about its work and projects. WTD staff remain available to answer questions via email and phone during regular business hours. Project information lines remain available and are being monitored for ongoing construction projects.

Project update

March 23, 2020

Starting as early as Monday, March 23, crews will be working an additional shift at the Georgetown Wet Weather Treatment Station site at the corner of Fourth Avenue South and South Michigan Street. Extended hours shift crews will begin to work from 2:30 p.m. to 2:00 a.m. during weekdays. A noise variance permit during this timeframe has been approved. This work shift is in addition to crews working the regular permitted hours from 7 a.m. to 6 p.m. Crew will be working inside the fencing on the treatment station’s equalization basin. This work could last for several months.

As crews continue to make progress constructing the wet weather treatment station, conveyance pipes, and new outfall pipe, additional pedestrian and commuter detours may be needed. King County WTD will work to notify the community ahead of time before those detours go into effect. In early April, the community can expect a sidewalk detour on Fourth Avenue South as utility work is completed. The sidewalk on the north side of the road will be closed for up to three days, and pedestrians will be rerouted to use the sidewalk on the south of the road instead. 

Pipelines next to the Georgetown Wet Weather Treatment Station

The Spring 2020 newsletter is now posted. Learn about latest construction activity, how the station treats wastewater during a heavy rainfall event, what you can expect during construction, and the art planned at the facility.

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

Facility Address:
6185 4th Ave S, Seattle, 98108

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

georgetown_wwtf_SC_400

Back to the capital projects overview map .

aerial map of the project area