SR 108 - US 101/Mason and Thurston Co Fish Barriers - Remove Fish Barriers

Project news

  • This project addresses multiple barriers to fish under State Route 108 between McCleary and Kamilche and one location on US 101 near the Mason/Thurston County line.
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Needs & benefits

Correcting fish passage barriers is an important part of the state's efforts to protect and restore fish runs negatively affected by outdated culverts under state highways.

A 2013 federal court injunction required WSDOT to significantly increase the state’s efforts in removing state-owned culverts that block habitat for salmon, bull trout, and steelhead.

Replacing outdated culverts with either bridges or fish passable structures will increase the likelihood of fish migration. The improvements will slow water and build the creek to help simulate a more natural creek environment.

Two of these locations will be corrected with concrete culverts for improved fish passage. The concrete culverts both support the highway while providing ample room for the stream to meander under the roadway.

Timeline

Summer 2021 – Project advertised for competitive bidding

Winter 2021 - Project awarded

Spring 2022 – Construction begins

Fall 2023 – Project complete

Funding

Total project costs will be published once a successful low-bid contractor has been selected.

Contact

Bill Elliott
WSDOT Project Design Engineer
360-357-2735

Doug Adamson
WSDOT Media Relations
360-357-2716

SR 108 and US 101 Mason and Thurston counties project map