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Most King County offices will be closed on Thursday and Friday, Nov. 22-23, 2018, for the Thanksgiving holiday.  
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Project updates

See construction page for summary of work to date on the project.

September 28, 2018: Upcoming restoration along Interurban Trail in Algona

August 30, 2018: Project updates for work in Auburn, Algona, Pacific

Kiewit Infrastructure West has been selected as the contractor for this project. Work is underway in Pacific, Algona and Auburn.

You can contact the project team with questions or concerns at 206-205-9283.

Sign up for project updates to stay informed about construction activities.

See the project library page for a list of all notices and other project materials.

Project description

Since 2008, King County Wastewater Treatment Division has been working to improve the wastewater system in southeast King County. In 2014, the County completed two new pipelines in Kent and Auburn (See Phase A info here).

We are now constructing the second phase of the project, including building 14,000 feet of new sewer line in Pacific, Algona, and Auburn, and making upgrades to the Pacific Pump Station.

Why is King County making these improvements?

  • To protect public health and the environment
  • To continue to provide safe, reliable sewer service as the area grows
  • To provide enough capacity to transport wastewater through 2060 in the project area

Project area

Project schedule

  • Construction started in spring 2017 and is expected to last for two years.
  • To see when work is expected to take place in your area and how long work will last, review our construction map.
  • Sign up for updates and we’ll keep you informed about the project schedule and activities!


Contact us

Project hotline:  206-205-9283

Contact David Freed at: 

Stay informed

Sign up for project email or text updates (or manage your subscriptions).

Project location


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