Interbay Pump Station upgrade
The Interbay Pump Station is located near the intersection of West Garfield Street and 15th Avenue West. More photos.
The pump station conveys wastewater flows from the Elliott Bay Interceptor system serving central, south and southwest Seattle to the County’s regional West Point Treatment Plant in Magnolia.
To protect public health and the environment by conveying the region’s wastewater for treatment safely and reliably the King County Wastewater Treatment Division is upgrading the Interbay Pump Station. Many of King County’s wastewater facilities are more than 40 years old and do not meet current design standards.
The Interbay Pump Station, built in 1967, is located near the intersection of West Garfield Street and 15th Avenue West in Seattle. The pump station conveys wastewater flows from the Elliott Bay Interceptor system serving Seattle to the County’s regional West Point Treatment Plant in Magnolia.
Need for the project
The purpose of this project is to replace 1960s era mechanical and electrical equipment, upgrade the HVAC systems, provide standby power generation capacity to power the pumps, provide odor control, and increase overall pump station capacity from 122 million gallons per day (mgd) to 133 mgd. The pump station will remain in operation throughout construction.
View construction photos.
Summary of proposed work
- Construct new generator building to provide emergency power and improve the pump station’s reliability
- Replace all three pumps, one each summer (2012, 2013, 2014)
- Replace/upgrade mechanical, electrical, and controls equipment
- Upgrade the HVAC systems
- Increase pump station capacity from 122 mgd to 133 mgd.
Anticipated construction schedule
- January 2011 – February 2015