US 12 is reduced to one lane in each direction around the clock at three locations between Montesano and Elma. SR 8 is reduced to one lane in each direction around the clock between Elma and McCleary. Travelers can expect daytime single-lane closures east of McCleary near Mox Chehalis Road East.
Project overview
This project replaces five outdated culverts under US 12 and State Route 8 in Grays Harbor County between Montesano and the Thurston County line for improved fish migration.
What to expect
Throughout spring and summer 2025, crews will work to finish fish passage construction and open all lanes of US 12/SR 8. Travelers will see occasional rolling slowdowns. The rolling slowdowns allow crews to quickly deliver materials to the work zone and complete paving and striping. Please do not pass workers or vehicles slowing traffic. The rolling slowdowns also minimize disruptions to travelers by keeping lanes open.
Once all lanes are reopened, travelers will still see daytime lane closures until major work is complete in the fall.
This project addresses multiple barriers to fish that travel under US 12 and State Route 8 in Grays Harbor County between Montesano and the Thurston County line.
