Murray CSO control project -- Building a new storage tank to protect Puget Sound
May 20, 2016
To keep the project on schedule, King County’s contractor will begin working regularly on Saturdays, as needed, for the remainder of the project. Regular Saturday work will begin as early as Saturday, May 21. Normal work hours on Saturdays are 9 a.m. to 6 p.m.
Saturday work activities will vary as progress continues this summer and fall. Below is a list of current activities that you might see on Saturdays:
- Connection of the underground storage tank to above-ground facility operations.
- Installation of the 5-foot-wide sewer pipe along the southeast side of Beach Dr. S.W.
- Shoring work associated with the 5-foot sewer pipe installation. Increased noise and vibration can be expected at times during shoring work.
- Mechanical and electrical work inside the facility building.
Thank you for your continued patience during construction.
View project update.
Installation of the final section of the 5-foot-wide sewer pipe is underway
Have a comment or question? Need more information about the project?
Click here to contact the project team.
Murray Project Hotline: 206-205-9186
Final Design, December 2012
Project haul routes, February 2014
Murray basin and project location
King County is designing an underground storage tank across the street from Seattle’s Lowman Beach Park. The tank will store approximately one million gallons when the Murray Pump Station exceeds maximum capacity.
Why do we need this project?
Protect public health
Like many cities around the country, the older parts of King County's wastewater system uses a single set of pipes to carry untreated sewage and stormwater to a treatment plant. To prevent sewer backups into homes and streets, the system includes safety valves called “combined sewer overflows” that route excess sewage and polluted stormwater flow directly into Puget Sound during storms. Although CSOs reduce potential exposure to untreated sewage, they pose significant public health concerns.
Clean up Puget Sound
The Murray CSO control facility will reduce CSOs into Puget Sound. State regulations require no more than one untreated discharge per year. The Murray Pump Station averages five untreated CSO events per year, discharging 5 million gallons into Puget Sound off of Lowman Beach Park.
How has the community shaped facility design?
Since October 2011 Lowman Beach Park neighbors and park users have worked with local designers, environmentalists and community advocates to help the King County project team design a facility that fits with the community. These discussions produced “common themes” for the design that reflect the community’s values for a safe, reliable facility. The common themes are:
- Minimize the “industrial facility” feel
- Encourage views of Puget Sound
- Discourage through traffic on Beach Drive
- Enhance continuous space between Lowman Beach park and the facility site