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Help WTD improve its accessibility! Please take 5 minutes to fill out this survey.
This survey is about the accessibility of our products, programs, services, and spaces. Please complete the survey by September 30, 2026: here. WTD will use the information shared with us to help identify and prioritize steps to make our system more accessible for all people.
This survey is about the accessibility of our products, programs, services, and spaces. Please complete the survey by September 30, 2026: here. WTD will use the information shared with us to help identify and prioritize steps to make our system more accessible for all people.
The South Interceptor Rehabilitation project will repair over 1,600 feet of deteriorated sewer pipe and seven maintenance holes in the City of Renton.
Project description
King County will repair about one-third mile of sewer pipes and seven maintenance holes serving the City of Renton. Work is expected to start in Spring 2028
These pipes are old. Repairing them will maintain reliable service for decades. We will use temporary pipes to maintain sewer service in your area while we make repairs.
Project update
September 2026
Past project updates
Project location
The pipe runs deep underground beneath SW Grady Way and Interstate 405. The project will occur in a commercial and industrial area in Renton with a lot of traffic. We will work with the City of Renton to keep traffic moving and limit disruptions.