The Idaho Transportation Department estimates State Highway 55 between Smiths Ferry and Round Valley Road will remained closed for another seven to 10 days, depending on weather.
A rockslide blocked the road near Rainbow Bridge, about 20 miles south of Cascade, on Nov. 18th.
Road crews have constructed a 20-foot-tall, 400-foot-long buttress to stabilize the base of the slide. The next step is to remove slide debris, install drainage systems and widen the road to two lanes before winter.
During the closure, travelers are advised to use U.S. Highway 95 as an alternate route.
