Ship Canal Water Quality Project

Seattle Public Utilities & King County

Seattle, WA

This 2.7-mile underground storage tunnel reduces water pollution into the Lake Washington Ship Canal, which will hold more than 15 million gallons of storm water during heavy rains. Landscape improvements were required at five at-grade access points and utilities associated with the tunnel. These are located at key sites within the Ballard, Fremont, Wallingford, and north Queen Anne neighborhoods. A pump station at the Ballard site includes an urban tree farm, phytoremediation planting, green stormwater infrastructure, and a new shoreline street end. All project sites include public art related to stormwater treatment and the ship canal project. HBB assisted SPU in presenting to the Seattle Design Commission, Executive meetings, and provided illustrative renderings to support public outreach initiatives. HBB prepared landscape, urban design, and irrigation construction documents for all project sites.