A five-mile stretch of state Route 7 in east Pierce County will be closed starting Monday so crews can stabilize the hillside.
Last month, a mudslide closed a section of the road near La Grande for several hours.
Starting Monday, crews will begin removing loose rock and material from along the highway. The road will be closed between Alder Lake and La Grande from 4 a.m. Monday to 6 p.m. Friday.
Limited access will be allowed during the work. A signed detour will be in place for the 1,600 motorists who use the five-mile stretch every day.
Transportation crews cleared more than 300 cubic yards of debris from SR 7 after the April landslide.