Work complete at SR 106 Twanoh Creek fish barrier removal site east of Union

UNION – A barrier to fish migration between the Hood Canal and Twanoh Creek is no more. Crews recently completed a culvert replacement project under State Route 106 at Twanoh State Park.

On Friday, Sept. 8, crews finished work that involved removing an old culvert and replacing it with a new, larger box culvert at Twanoh Creek. The new culvert simulates a more natural creek environment. This will help make it easier for fish to pass through the area during migration.

Contractor crews working for the Washington State Department of Transportation began work on June 19. The project included a 22-day closure of SR 106. The full closure allowed crews to work around the clock, shortening the overall timeline of the project. The closure also reduced the environmental footprint because crews did not need to build a temporary bypass road.

WSDOT would like to thank nearby property owners and travelers of SR 106 for their patience this summer while crews completed this work.

About our fish passage program

This work was part of WSDOT’s ongoing effort to remove barriers to fish under state highways. Fish Barriers include items such culverts under roadways that are too small for fish to swim through during migration. These projects help protect and restore salmon runs, the landscape and the economy.

Travelers can receive email updates about roadwork on state highways in Mason County. Real-time information is available via the WSDOT app and WSDOT Travel Center Map.

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