Murray Wet Weather Facility
Community celebration and facility tours -- June 10th
Thanks for joining the King County WTD to celebrate the completion of the Murray CSO Control Project on June 10! We would like to thank community members and project neighbors for their patience and understanding during construction.
24-hour emergency and odor reporting:
Contact West Point Treatment Plant at 206-263-3801.
7018 Beach Dr. S.W., Seattle
Back to the capital projects overview map .
See how public art at KCWTD facilities connects community to our system and the environment.
King County built a million-gallon underground storage tank across the street from Seattle’s Lowman Beach Park to reduce combined sewer overflows (CSOs). The tank stores excess stormwater and wastewater that would otherwise overflow into Puget Sound when the Murray Pump Station exceeds maximum capacity. Learn more about this project.
The Murray Wet Weather Facility began operating in November 2016. Project restoration was completed in spring 2017.
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 Wet Weather Facility was built to reduce CSOs into Puget Sound. State regulations require no more than one untreated discharge per year on a long-term average. Prior to construction of the Murray Wet Weather Facility, the Murray Pump Station averaged five untreated CSO events per year, discharging 5 million gallons into Puget Sound off of Lowman Beach Park.
Source: Spring 2017 newsletter
The new facility features the following elements.
- Property acquisition
- An underground diversion structure located in Beach Drive Southwest
- A pipe connecting the diversion structure to the storage tank to convey peak flows during a wet weather event
- An approximately 6,000 square foot underground storage tank across from Lowman Beach Park
- Retaining wall to protect the existing hillside along the northeast, east, and south edges of the storage tank site
- One story equipment facility including mechanical and electrical facilities, located above the storage tank
- Landscape restoration in Lowman Beach Park and above ground at the storage tank site
- A green roof with viewing areas
- Public walkway through the site with rain garden
- 3,500 square foot public use space north of facility
There are three interpretive signs located on top of the wet weather facility.