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Lake Hills sewer relining

King County installed pipe lining along the Lake Hills Sewer concrete pipe to prevent corrosion and extend the life of the pipe another 50 years.

Substantial completion – December 2023

Project description

As part of the Lake Hills Sewer Relining Project, King County installed pipe lining along approximately 7,200 feet of the 48-inch and 54-inch diameter concrete pipe using a spiral wound PVC relining method. The Lake Hills sewer runs near Bel-Red Road in the Spring District of Bellevue between Bel-Red Road and Northup Way.

  • Charter approval: July 2018
  • Preliminary design: Nov 2018 – Feb 2022
  • Design: Feb 2022 – November 2022
  • Notice to Proceed: March 2023
  • Substantial completion: December 2023
  • Final acceptance: May 2024
  • Close out: June 2025
  • Total cost: $20.5 million

Project benefits

  • Extend the useful life of the pipe for another 50 years
  • Maintain reliable service for our customers
  • Improve water quality in our region

Outreach conducted by project team

  • Project fact sheet (Spring 2021)
  • Three newsletters: Project introduction (Winter 2022), Pre-Construction (Spring 2023) and post construction survey (Winter 2023).
  • One virtual community briefing: March 2022.
  • 9,032 project GovDelivery subscribers who received newsletters and construction notifications.
  • 14 construction update notifications were sent out using project webpage and GovDelivery
  • Interactive construction map was embedded with the project web page. The interactive map showed in real time where the active construction was and any anticipated impacts.