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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

Notice 14: Road closure for traffic, February 23.

The Lake Hills sewer pipe rehabilitation is complete. The construction crew will work to complete the street and cross walk restoration work. This notice is to inform you of the following road closures on Friday, February 23, during the work hours of 7 a.m. and 7 p.m.

  • Bel-Red Road and Northeast Spring Boulevard intersection
  • Eastbound lane closure on Northeast Spring Boulevard from 130th Avenue Northeast to 136th Place Northeast. 

The above restoration work is weather dependent. Please pay close attention to traffic control and construction signs!

Visit the interactive construction map to see the active street restoration activities. 

We will continue to keep the community, nearby businesses, and impacted properties informed as we complete the restoration work.

King County’s goal is to complete construction efficiently to minimize disruptions to the community. If you have questions or concerns, call our construction hotline at 425-224-2475 or email Demmelash Adera at

Library and resources

Post-construction survey, December 20, 2023

Thursday, March 3, 2022
12:00 pm
Zoom meeting


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.