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Lake Hills sewer relining

The Lake Hills Sewer Relining Project will install pipe lining along existing concrete pipe to prevent corrosion and extend the life of the pipe another 50 years. 

Project description

As part of the Lake Hills Sewer Relining Project, King County will install pipe lining along approximately 7,200 feet of the 48-inch and 54-inch diameter concrete pipe. We will use a spiral wound technology, which allows crews to rebuild the pipe from the inside. Crews can feed the spiral wound lining in through maintenance holes, which speeds up the construction process and helps to minimize impacts to the community by repairing the pipe in its current placement.

The pipes need to be dry during lining, so we will need to reroute existing wastewater into a smaller temporary pipe. This temporary pipe would likely be routed above ground along streets, partially trenched, or be outfitted with ramps to help people and vehicles safely travel across. Construction is expected to take up to six months.

Learn more about the Lake Hills sewer relining

Project update

November 22, 2023

Post-construction survey

The King County Wastewater Treatment Division has completed the Lake Hills Sewer Interceptor Phase II rehabilitation in the vicinity of Bel-Red Road in the Spring District of Bellevue, between Bel-Red Road and Northrup Way. Now the pipe is now in full service.

Thank you to our project neighbors! Your input during design and your patience during construction are deeply appreciated.

Being a good neighbor is very important to King County. Please share your views about your experiences with the project by using this SURVEY LINK. Survey is open through December 31, 2023.

Thanks in advance for taking a few minutes of your day to fill out our post-construction survey. We appreciate your feedback.

Construction map

The interactive construction map shows active construction updates on the streets between 120th Avenue NE and NE Spring Boulevard where temporary pipes, road and sidewalk closures, equipment staging and other construction activities will occur for up to seven months.