Seattle City Light (SCL) is working on a wetland re-establishment, rehabilitation, and enhancement project in order to mitigate for recent impacts on several wetlands and buffers in Tukwila. The unique project at the Creston-Duwamish Transmission ROW called for the construction of several “hummocks and hollows” within a perched wetland, adjacent to the Duwamish River that would provide several vegetation habitat niches.
What should have been a straightforward wetland mitigation project has experienced several challenges due to an unexpectedly shifting hydrology. There is much to take away from this fascinating case study in wetland restoration that sits at the confluence of issues with site history, adjacent properties, climate, and design.
Horticulture / Plants
Parks & Recreation
Sustainable Development & Design
Water / Stormwater Management
Health, Safety and Welfare
View a real life example of a wetland enhancement and restoration project
Understand the site characteristics that impacted the restoration project
Learn what steps the restoration practitioners took to address the shifting hydrology and what was successful or not.
Charlie Vogelheim, Forterra & Rory Denovan, Seattle City Light
University of Washington Botanic Gardens