Wastewater / Stormwater System Rehabilitation - Cured-in-Place Pipe (CIPP)

Vicinity Map

Location: Downtown, Education Hill and Rose Hill Neighborhoods (see vicinity map)

Project Phase: Construction Complete

Contact: Joe O’Leary, 425-556-2738

Page Last Updated: 09/11/18

In 2015 and 2016, City maintenance workers conducted video inspections of downtown wastewater system pipes and stormwater system pipes on Education Hill and in the Sunrise Vue Development. These video inspections revealed that a number of existing wastewater and stormwater lines are badly deteriorated and in need of rehabilitation.

This project rehabilitated approximately 3,850 lineal feet of wastewater pipe and 1,280 lineal feet of stormwater pipe using a cured-in place pipe trenchless technology that rehabilitates pipes without needing to excavate the entire pipe. The existing wastewater and stormwater pipes have been restored with a new interior-hardened liner that will increase the life span of the pipes.

Detailed map of downtown work zone
Detailed map of 171st work zone

Before and After Photo