Murray CSO control project -- Building a new storage tank to protect Puget Sound
August 8, 2016 update:
Starting as early as Monday, Aug. 8, King County’s contractor will use a concrete saw to cut through the roadway on Beach Dr. S.W. at the intersection with 48th Ave S.W. The saw will cut thin lines in the road in preparation for road restoration. You will still be able to drive on the road after it has been cut. Saw cutting is expected to take three to five days to complete.
What to expect:
- Beach Dr. S.W. narrowed to one lane at the intersection with 48th Ave S.W.
- Increased noise levels
- Traffic delays of up to five minutes
- Flaggers safely directing traffic through the intersection during working hours
- Variable roadway conditions. Cyclists should use caution when traveling through the intersection
Additional project work will continue while saw cutting is underway.
Thank you for your continued patience during construction.
Please direct any questions or concerns to the project hotline: 206-205-9186. .
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