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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

February 12, 2021

Electrical line relocation work on 35th PL SE extended

King County has been working with Puget Sound Energy to relocate gas and electrical lines away from the future sewer pipeline.  Gas line relocation work is on schedule along 35th PL SE, but relocation of the electrical line is taking longer than expected.  Work is now anticipated to continue through mid-March. Read more about work on 35th PL SE .

If you are interested in a project update for your community group or neighborhood, please contact Kristine Cramer at 206-477-5415 or Kristine.cramer@kingcounty.gov.

Project description

With over 400 miles of pipes moving wastewater to one of our award-winning treatment plants, King County WTD works hard to maintain our system. We inspect and monitor our regional system and update plans for needed upgrades.

King County WTD needs to replace sewer pipes that serve areas in North Mercer Island, the southwest portion of Bellevue near Enatai Beach, and the Town of Beaux Arts Village. This pipeline carries wastewater from the North Mercer Island Pump Station to the Sweyolocken Pump Station in Bellevue.

Project area mapView larger version . December 2018

Schedule

Project design began in 2016 and will be complete in 2021. Construction is expected to begin in 2021 and extend until 2025.

project timelineView larger version .

phases_graphic_construction

Contact us

Contact Kristine Cramer, community services lead at:
kristine.cramer
@kingcounty.gov

 206-477-5415

Or
Shai Malone at
 smalone@kingcounty.gov
 206-263-9416

 Feedback form

Sign up for email or text updates

To sign up for text alerts, text KING MERCERSEWER to 468-311 for Mercer Island, and KING ENATAISEWER to 468-311 for Enatai. To sign up for email updates, please visit the public involvement page.

Project location

Project pipeline alignment and service area

Back to the capital projects overview map .

Related information

Regional Wastewater Services Plan

Local municipalities: