Current Projects

We are focusing on catch basins and outfalls around Lake Union and Lake Washington. Initial projects we’ve completed and have identified around the lake include the many streets ends and their catch basins. Before our intervention, stormwater flowed untreated into the lake, harming it’s health and the broader ecosystem it supports.

Aurora Bridge Bioswales

The Aurora Bridge Project addresses the nearly 2 million gallons of polluted runoff from the bridge that enters Lake Union and the Fremont Cut each year.

Each phase of this multi-year project is possible because of the innovative support from private developers, the State of Washington, The Nature Conservancy, local businesses such as Adobe and Boeing, and Seattle business leaders.

The Aurora Bridge Swales design partners include Weber Thompson and KPFF Engineers.

Click for full image (Graphic by Weber Thompson)
Photography by Built Work Photography

Phase 1

Troll Ave West, Data 1 Building

Completed in July 2017, this bioswale is capturing and cleaning an estimated 200,000 gallons of stormwater annually.

In partnership with Hess Callahan Partners & Hal Real Estate, Inc

Photography by Built Work Photography

Phase 2

Troll Ave East, Watershed Building

Completed in Spring 2020, this bioswale is treating an estimated 400,000 gallons of stormwater annually.

In partnership with:
Hess Callahan Partners & Spear Street Capital

Photography by Built Work Photography

Phase 3

North Span

Completed in 2022, these bioswales capture and clean 1,200,000 gallons of stormwater annually.

Project supported by the State of Washington, Boeing, The Nature Conservancy, & Quadrant Lake Union Center, The Holocene Foundation, Tableau, Adobe, Geocache HQ

Rendering courtesy of Weber Thompson

Phase 4

Northlake Commons

Anticipated completion November 2023. This large regional stormwater system will collect and clean upwards of 3,000,000 gallons of stormwater annually from the Wallingford neighborhood.

In partnership with:
Hess Callahan Partners, Spear Street Capital, Dunn Lumber

Eastern Avenue Street-End Project

Anticipated construction start of Summer 2023. This street-end catch basin and bioswale will capture 200,000 gallons of water annually.

This catch basin, like many others around Lake Union, was collecting polluted storm drain and street runoff water and discharging it directly into the lake without any treatment. This is the catalyst that inspired the creation of  Clean Lake Union.

Oil slick in the water at the Eastern Avenue Street-End Project