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Project updates

Project update for December 23, 2019 through January 8, 2020

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project is to sign up for project updates.

Learn more: Spring 2019 Project Newsletter - Sewer line work begins this spring!

Project description

The Eastside Interceptor (ESI) is a regional sewer line that carries wastewater from eastside homes and businesses to King County’s South Treatment Plant in Renton. This project will repair about 3,700 feet of the line by installing a liner on the walls of the pipe.

The project area follows Logan Ave. North, from around the intersection of Garden Ave. on the north end, to near North 6th Street between Logan and Burnett Ave. North at the south end of the project.

Work began this spring 2019 and is expected to take 6 to 8 months to complete.

Please see the project Construction page for details about the project and its impacts.

Why are we doing this project?

The Eastside Interceptor is one of the main sewer lines that bring untreated wastewater to the treatment plant in Renton. This line starts near Kirkland and runs south on the east side of Lake Washington. It is eight feet in diameter by the time it gets to the project area. The pipe is aging and reaching the end of its service life. It is over 50 years old and corrosion has been found in parts of the pipe. The pipe needs to be repaired so it does not fail, overflow or disrupt service.

What are the benefits?

This project will allow the pipe to stay in use for perhaps another 50 years, or more. Lining the pipe will reduce the surface impacts when compared to replacing the line.

Construction phase

For information about the project

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

Please sign up for email and text alerts separately.

For questions about the project, contact David Freed at: or at 206-263-9453

Project location

Project area map - click on map to view Project Construction page.