The speed limit on a slide-prone section of US 101 south of Cosmopolis will be reduced from 50 mph to 25 mph on Thursday, Dec. 10.
Recent heavy rains caused earth movement and cracks to develop across both lanes, causing a section of highway to slump. The affected area is at milepost 78.9.
The new 25 mph speed limit will remain in effect until further notice. The adjusted speed limit will be enforceable as soon as the signs are installed.
During Thursday, Dec. 10, crews also plan additional efforts to level the road surface with compressed gravel. This section of US 101 will remain this way until weather conditions allow crews to repave the surface.
Slope monitoring devices will also be installed to track any future movement of the roadway and associated soils throughout the winter months. The data collected will aid design recommendations for a permanent repair.
WSDOT has received funding to design and construct a permanent repair for this section of roadway during the 2019-2021 biennium.