Drivers will soon need to plan for partial and full closures along a short segment of State Route 106 at Twanoh State Park once a project to remove and replace an outdated culvert begins Monday, June 19. Contractor crews working for the Washington State Department of Transportation will begin a summer-long project to replace a barrier to fish at Twanoh Creek. The work is part of WSDOT’s ongoing effort to remove barriers to fish under state highways.
The project is limited to a short segment of road at Twanoh State Park.
- From Monday, June 19, to Sunday, July 9—and again from Monday, July 31, to Friday, Sept. 1—travelers will encounter intermittent, one-way alternating traffic during construction, along with occasional traffic stops of up to 15 minutes.
- Between Monday, July 10, and Sunday, July 30, WSDOT will close SR 106 around the clock to all traffic at Twanoh State Park. A signed detour will direct traffic around the closure onto US 101 and State Route 3 through Shelton. County roads will be available for detour with access at E Trails Rd and E McReavy Rd. (See North Mason Regional Fire Authority Recommended Detour Map)