SR 202/Evans Creek – Fish Passage and Adaptive Management

Project overview

This project will remove a fish passage barrier along Evans Creek at State Route 202 just west of 236th Avenue Northeast near Sammamish. Contractor crews working for WSDOT will remove an existing 6-foot box culvert and fish ladder and replace it with a fish-passable structure. This new structure has the potential to open more than 5.25 miles of habitat for coho, steelhead, sea-run cutthroat and resident trout.

This project is bundled with fish passage projects along Interstate 90 at Issaquah Creek and a tributary, SR 202 at Little Bear Creek, SR 203 at Thayer Creek, and SR 900 at Green Creek. These projects will enhance fish habitat and passage by adding meander bars, new stream bed sediment and boulders, and large woody material.

What to expect

On SR 202 at Evans Creek, contractor crews will build a temporary bypass, called a shoo fly bypass, for one lane of traffic in each direction on the side of SR 202 near the construction area. Travelers can expect four weekend closures of SR 202 at Evans Creek to build the bypass at the beginning of the project and remove it at the end of the project. During these closures, a detour will guide eastbound and westbound SR 202 travelers around the work zone using 236th Avenue Northeast, Northeast Union Hill Road, 208th Avenue Northeast and 204th Place Northeast. Closure dates have not been set. 

For the other portions of the project, travelers can expect single-lane closures on I-90 and flaggers alternating traffic at SR 202, SR 203 and SR 900.