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Project update

Update May 12, 2017: Dewatering equipment installation on Frontage Road

Update May 5, 2017: Spring 2017 Project Newsletter available

April 17, 2017

Preconstruction activities begin – surveying potholing, etc. View project update .

King County has selected a contractor, Kiewit Infrastructure West, for this project. As the contractor prepares for construction, you may see crews surveying the area and mobilizing equipment.

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

See more details about construction in Algona and sign up for project updates to stay informed about construction activities.

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). Now, we are gearing up to construct the second phase of the project, building a new sewer line in Pacific, Algona, and Auburn.

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

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

Contact David Freed at: 

Project location


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