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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 pipeline in Bellevue that is nearing the end of its useful life.
Project description
The Eastside Interceptor (ESI), which consists of 14 pipe sections, is a large and critical component of King County’s wastewater conveyance system. The ESI collects and conveys untreated wastewater from homes, businesses, and schools between Kirkland and Renton and sends it to South Treatment Plant to be cleaned and released into Puget Sound.
This project will repair ESI Section 8 (ESI 8), a 1-mile underground pipeline going from the I-90 and I-405 interchange in Bellevue to the intersection of Coal Creek Parkway Southeast and I-405. Completing repairs now will help extend the life of this vital section of the wastewater pipeline for another 50 years, ensuring reliable wastewater services for thousands of homes, businesses, and organizations in the region.
Project update
Upcoming utility investigation work
Beginning in November 2024 and continuing through spring 2025, contractor crews will conduct geotechnical investigations and other fieldwork activities at multiple locations along the existing ESI 8 sewer line, temporary diversion pipe alignment, and King County parcels. The data collected from this work will help our team refine the design and prepare for construction. Work will occur on weekdays during standard daytime work hours and is expected to take 3-5 days to complete at each location. Additional notification will be given to homes and businesses near the work sites.
Understanding site conditions and rehabilitation options
Our team is in the early stages of project design. During fall 2024, the project team will:
- Begin design of the preferred rehabilitation option.
- Survey the project area to understand existing conditions in the Eastside Interceptor Section 8 (ESI-8) sewer line and maintenance holes.
- Conduct geotechnical surveys to understand underground conditions.
- Inform community members about the project and upcoming survey work.
Check back soon for more project updates.
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