5 Day Daytime closure of US 101 at Cosi Hill begins June 17

Grays Harbor County travelers: US 101 at Cosi Hill will close to all traffic around-the-clock from 6 a.m. Monday, June 17 to 6 p.m. Friday, June 21. Weather permitting, the five-day closure allows contractor crews working for the Washington State Department of Transportation to construct temporary lanes around a slide-prone section of the highway near milepost 78.

Once US 101 reopens on Friday evening, travelers will encounter narrowed and shifted lanes through the work zone. This temporary roadway configuration will allow crews to rehabilitate the slope while maintaining traffic during the two-year construction project.


June 17-23 detour information:

During the closure, travelers will follow a signed, 7.5-mile detour via State Route 107 and Blue Slough Road.

The intersection of SR 107 to northbound US 101 will close to traffic. Northbound US 101 drivers will detour using SR 107.
Southbound US 101 drivers out of Aberdeen will detour using Blue Slough Road. Access to and from the Highlands Golf Course entrance will be maintained.



Additional work on SR 107

Travelers using SR 107 near Montesano are advised that the Chehalis River Bridge has one-way alternating traffic in place while crews rehabilitate the bridge.

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