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The existing 24th Avenue NW pedestrian pier will be replaced.
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.
The Ship Canal Water Quality Project will be completing a number of projects in Ballard. These projects center on Seattle Public Utilities’ property at 24th and Shilshole avenues NW. To learn more about projects and activities in Ballard check out the latest project fact sheets and read below:
The Ship Canal Water Quality Project includes the following projects and activities in Ballard:
24th Avenue NW pier
Site Master Plan
Ship Canal Water Quality pump station
Site preparation and 24th Avenue NW pier construction (Ballard Early Work) started in September 2018. The storage tunnel, pump station, and Shilshole pipe are currently in design. The site master plan and conveyance are in options analysis.
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.
The 24th Avenue NW Pier will provide pedestrian access to the waterfront and feature public art. The construction of the new pier will also remove creosote-treated wood pilings from Salmon Bay, which will improve water quality and create better fish habitat.