Murray CSO control project
Project area
King County plans to design and build a one million gallon underground storage tank on private property across from Lowman Beach Park along Beach Drive Southwest. This facility will store peak flows when the Murray Pump Station reaches capacity. The project also involves an underground diversion structure located under Beach Drive Southwest and an ancillary equipment facility (mechanical and electrical unit) above ground on the storage tank site.
Murray CSO Control Facility Site Plan (PDF) -- slide 3 from the Final Facility Design Presentation (PDF), December 11, 2012
Project elements
The project includes 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
Project design
Public walkway and rain gardens (PDF), September 2012
Viewing areas and green roof (PDF), September 2012
Draft interpretive sign location (PDF), September 2012
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