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Project updates

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

February 15, 2018: Sewer line installation on Seattle Boulevard South continues; preparation begins along First Avenue North

November 15, 2017: Crews begin to install new sewer line on Seattle Boulevard South

October 27, 2017: Work continues along Seattle Blvd. in Algona – pipe installation begins in Nov.

October 19, 2017: construction begins at Frontage Road North and Ellingson Road intersection

October 13, 2017: Preparation for new sewer line continues along Seattle Boulevard

September 1, 2017: Sewer pipe work on Frontage Road re-starts next week

August 24, 2017: work postponed in Algona along Interurban Trail

August 17, 2017: work along Frontage Road in Pacific resumes

July 15, 2017: View information materials from our table at Algona Days

King County has selected a contractor, Kiewit Infrastructure West, for this project. Construction is currently 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, 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 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

24-hour project construction line:  206-205-9283

Contact David Freed at: 

Stay informed

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Project location


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