• Project

I-90 - Lewis and Sunset Creeks - Fish Passage

Project overview

As part of the state's fish recovery efforts, WSDOT has made it a priority to reconnect waterways where our roads act as barriers. In western Washington, that means building hundreds of fish passable structures under state highways in the next decade to create habitat gain essential for meeting our fish recovery goals. In 2023, WSDOT will build nine structures under I-90 and local roads in Issaquah and Bellevue to restore natural stream conditions in Lewis and Sunset creeks.

Spring 2021 - Winter 2028
Project status
$138 million

What to expect

I-90 travelers and users of local roads can expect long-term lane reductions in both directions of I-90, closures of local roads that may last one to three months, ramp closures and detours while crews build several new bridge spans on I-90 and parallel local roads.

By building five fish passages under I-90, Southeast Newport Way and West Lake Sammamish Parkway Southeast, we can return Lewis Creek to its natural stream conditions and open important spawning habitat to help several species recover. Visit the maps and drawings tab for information about Sunset Creek.