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Project update

August 25, 2022

Weekday lane restrictions starting 10 pm Thursday, August 25, and ending by 5 am, Friday, August 26

Crews will be working on an underground vault on South Michigan Street that will be used to make connections to the new treatment station site.Expect temporary lane restrictions while crews work on S Michigan St near E Marginal Way S.

King County crews will reduce traffic lanes on S Michigan St starting at 10 pm Thursday, August 25 through 5 a.m. Friday, August 26. Crews will be working on an underground vault on S Michigan St that will be used to make connections to the new treatment station site.

What to expect:

  • Lane and intersection closures from 10 p.m. Thursday, August 25 through 5 am Friday, August 26
  • Work will last approximately up to seven hours
  • Flaggers and traffic control to direct people around the work area
  • Bus stop location will not be affected
  • Noise and vibrations typical of construction work
  • Please pay attention to signage and flaggers for your safety and the safety of our crews

Please pay attention to signs and flaggers for your safety and the safety of our crews. Read the August 25 Project Update .

Take a look at our virtual construction progress on the Georgetown Wet Weather Treatment Station!

Mire nuestro video de recorrido virtual para enterarse de lo que hemos logrado en los sitios de desagüe, transporte y la estación de tratamiento.

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

If you’d like to receive email or text updates on the Georgetown Wet Weather Treatment Station:

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.