Flood in Custer County, Idaho

The Salmon River in Salmon reached moderate flood stage in May and this caused flooding from the headwaters of the Salmon south through Challis into Custer County. Trail Creek, Valley Creek, Garden Creek and Antelope Creek all overflowed banks with flood warnings throughout the month continuing in Custer County. Major damage occurred to backcountry roads and campgrounds. Significant agriculture damage occurred due to flooded fields. Road and bridge damage required significant repair along with significant USFS infrastructure damage. The cost of damage and flood protection rose above 3 million dollars for the month.

Winter snow melt continued from record winter snowfall and flooding continued throughout much of May in much of southeast Idaho especially in the central mountains and along the Big Wood River.