A 12-mile section of Idaho 21 in Boise County known as Avalanche Alley re-opened at 4:15 p.m. Sunday, according to the Idaho Transportation Department.

The section between Grandjean Junction and Banner Summit has been closed three times this winter due to avalanche threat, but the most recent threat has diminished.

During avalanche season last year, there were eight closures between Nov. 1 and March 31, totaling 21.5 days. A total of 50 slides tumbled down on the highway during that time.

That section of highway has about 60 avalanche chutes and 90 percent of the avalanches in the state that affect highways.

For the latest highway and weather conditions, call Idaho Traveler Services at 5-1-1 or call 888-432-7623. For online updates, visit the website at 511.idaho.gov.