Lake Hills and NW Lake Sammamish sewer upgrade

Project update

June 2024

Join us for more events this summer!

We had a great time connecting with Sammamish River Trail users during Bike Everywhere Day in May. If you missed us at Bike Everywhere Day, please join us at Redmond Derby Days on Saturday, July 13, from 10 a.m. to 9 p.m., at the Movies at Marymoor Park – Go Green Night on Wednesday, July 31 or at the Move Redmond Open Streets Festival on Saturday, August 17, from 10 a.m. to 3 p.m. Stop by our booth at any of these events to learn more about the project. We hope to see you there!

Designing large sewer upgrades take time… Construction now expected to begin in 2026

King County continues to update the design of the sewer upgrade project to meet permitting requirements from the City of Redmond, the City of Bellevue, and several state and federal agencies. Coordination with our partner agencies is necessary to make sure we install the new pipe in the safest way possible, limit impacts and maximize improvements for people and the environment.

Due to a delay in the design and permitting processes, we anticipate construction will begin in 2026. Thank you for your patience while we work hard to finalize our sewer design.

Detour update

One highlight from this year is that we were able to share information about our updated Sammamish River Trail (SRT) detour. When construction begins, King County’s contractor will intermittently close sections of the SRT between NE 85 Street and NE 51 Street and will detour traffic accordingly. This view shows a section of the planned detour between NE Leary Way and SR 520. A barrier will separate northbound vehicle traffic from bikes traveling southbound. The shared use path will be for northbound bikes and for trail users.

To see how the detour will help safely organize vehicle traffic and trail-users along West Lake Sammamish Parkway between NE Leary Way and NE Marymoor Way, view the detour update information from our most recent listserv. Be sure to sign up for our listserv to receive project updates as we finalize design!

Interested in a project briefing for your community group?

We are happy to meet with you or come to your next community event to share the latest project information and to answer questions you might have as we get closer to construction. Please contact Annie Pfeifer at 206-263-3203 or amurrillpfeifer@kingcounty.gov for more information.

Sign up for project text alerts

Be sure to sign up for project updates to stay up-to-date on the latest project information and upcoming events. You can also get updates from your phone. To sign up for text alerts, text KING REDMONDSEWER to 468-311.