The 12-mile stretch of Idaho 21 between the Grandjean Junction and Banner Summit remains closed Monday as crews work to reduce the danger along "Avalanche Alley, the Idaho Transportation Department reports.
The frequently closed stretch of highway was closed Friday evening as an avalanche-safety precaution, and the area got 26 inches of snow over the weekend, the ITD reports. "The avalanche danger is still considerable," according to a department news release.
This is the second closure of Idaho 21 because of the potential for an avalanche. The road was closed most of the weekend of Jan. 10-12 as nine slides tumbled down to the highway.
Despite 45-50 slides each year and more than 250 inches of snow on average, the forecast team has reduced closures by more than 60 percent since they began forecasting slides and slide threats five years ago.
The notorious "Avalanche Alley" section of Idaho 21 is home to about 60 avalanche chutes and 90 percent of the Idaho avalanches that affect highways.
For the latest highway and weather conditions, call Idaho Traveler Services at 5-1-1.