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Eastside Interceptor Section 8 rehabilitation

The Eastside Interceptor Section 8 Rehabilitation Project will repair 4,800 feet of a 90- to 96-inch wastewater tunnel in Bellevue that is nearing the end of its useful life.

Project description 

The Eastside Interceptor (ESI), which consists of 14 sections, is one of the largest conveyance systems within the Wastewater Treatment Division. The ESI collects and conveys untreated wastewater from homes, businesses, and schools between Kirkland and Renton and sends it to South Treatment Plant, located in Renton, to be cleaned and released into Puget Sound.

This project will repair a 1-mile section of the ESI called Section 8 (ESI 8), starting near the intersection of Interstate-90 and Interstate-405 in Bellevue to the intersection of Coal Creek Parkway Southeast and I-405. Repairs will help the pipe last another 50 years.

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Project update

January 2024

Happy New Year!

We want to hear from you! Survey is open through March 15, 2024

This is our first project newsletter as we are heading for the project design.  We want to know what matters most to you and how we can better provide you with project information and updates from design into construction. Thank you for taking our community survey! Design is expected to start early this year, and we will be back in touch with the community once that process is underway.

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