Translate
Alki standby generator
Enhancing the Alki Wet Weather Treatment Station and 63rd Ave Pump Station for reliability to protect Puget Sound.
The Alki Standby Generator project will ensure permanent, reliable power for key wastewater facilities in West Seattle, preventing overflows into Puget Sound and nearby bodies of water while protecting water quality. During construction, there will be temporary disruptions to parking, sidewalks, and beach access, but all areas will be restored and improved upon completion.
Project update
May 2025
King County Wastewater Treatment Division is kicking off construction in your neighborhood! Please read about what to expect as we improve wastewater infrastructure near you. Upcoming work begins as early as May 5, 2025.
King County will replace three concrete panels along Beach Drive Southwest, adjacent to the 63rd Avenue Pump Station to meet Seattle Department of Transportation requirements. To ensure everyone’s safety, please do not approach the crews while they are working. Expect lane shifts and increased noise during weekdays.
King County will also begin work to relocate a waterline and install electrical conduit on Beach Drive Southwest between 63rd Avenue Southwest and 64th Avenue Southwest. Expect construction crews and traffic control devices like cones and signs around the work area. Please also anticipate increased noise during work hours from equipment like jack hammers, saws and construction vehicles.
Read our latest community flyer for more information about the upcoming work.
Past project updates
- Upcoming work starting as early as March 10, 2025, February 2025
Project description
Installing this new generator brings important public health and environmental benefits to Puget Sound and your neighborhood
- Provides permanent and reliable power for important wastewater facilities serving West Seattle.
- Prevents wastewater overflows into Puget Sound and nearby bodies of water.
- Protects water quality.
Reliable power supply helps ensure our sewer system keeps working during outages and helps protect water quality in Puget Sound
Power outages disrupt operations of the facilities that can result in overflows. The Alki Standby Generator project will provide permanent and reliable electrical power to both the Alki Wet Weather Treatment Station (WWTS) and the 63rd Ave Pump Station. This will help stop stormwater and wastewater from overflowing into nearby neighborhoods and Puget Sound.
During construction, there will be temporary impacts to street parking, sidewalks, pedestrian ramps, and driveway access. Limited beachfront access will be on the eastern side of Charles Richey Sr. Viewpoint. We will work with the community to limit these disruptions and will share information about any impacts before they occur.
We will restore all work areas according to the City’s requirements and standards once construction is complete. This will include improved pedestrian ramps at the intersection of Beach Dr SW and 64th Ave SW.
Connecting the generator from the Alki WWTS to the pump station will require less equipment at the pump station. This means smaller changes to the footprint and visual impacts from the road.
Project location
Note: the map below includes conveyance lines (pipes) between the Alki Wet Weather Treatment Plant (outlined in blue) and the 63rd Ave Pump Station (green square). The "conduit route" between these two facilities is displayed on the About page.