- Environment & Conservation
- Construction & Development
- Businesses & Key Accounts
- Help & FAQs
- About Us
The east Ballard site for the Ship Canal Water Quality Project.
Seattle Public Utilities (SPU) and King County’s Ship Canal Water Quality Project is a 2.7-mile, 18'10"-diameter tunnel that will capture and temporarily hold more than 29 million gallons of stormwater mixed with some sewage during heavy rains. When the storm passes, flows will be sent to the King County West Point Wastewater Treatment Plant in Magnolia.
In east Ballard, Ship Canal Water Quality Project activities occur near 11th Avenue NW and NW 45th Street. These activities include building:
Elements of the Ship Canal Water Quality Project in east Ballard are currently in the design phase. Construction is expected in 2019.
This project will keep over 62 million gallons of polluted water out of the Lake Washington Ship Canal, Salmon Bay, and Lake Union each year. The project will limit CSOs to no more than one per outfall per year on average, in compliance with state and federal laws.