Rainier Valley wet weather storage
November 28, 2017
Project update : A look back at the progress made and at what’s next.
New sewer pipe construction complete!
In June 2017, King County’s contractor completed their work and put into operation the first of two project elements designed to reduce CSOs. We have completed the installation of a new sewer pipe that will be used to divert, or redirect, sewage and stormwater from a pipeline in Rainier Avenue that gets full during storms to another pipeline in Bayview that goes under Beacon Hill and has room to carry more flow. This work was done near the intersection of Rainier Ave. S. and S. Bayview St. We have also repaved the inside lanes of Rainier Avenue South and restored and returned the worksite to the property owner.
Continued construction activity at the tank site
Contractors are making progress on the above-ground building that will hold the electrical controls and standby generator needed to run the facility.
This project will keep sewage and stormwater out of the Duwamish River. A new sewer pipe will be installed near the intersection of Rainier Avenue South and South Bayview Street to send sewage and stormwater from a pipe that gets full during storms to another pipe that has more room.
A storage tank at the intersection of South Hanford Street and South 27th Avenue will catch any remaining extra sewage and stormwater to keep sewage and stormwater out of the Duwamish River.
New and reused pipe at South Bayview Street ( , May 2014)
Underground storage tank at South Hanford Street ( , May 2015)
Project schedule ( , May 2015)