Dams of Idaho

Interactive map application hosted by the Idaho Department of Water Resources to view dams in Idaho by status with potential downstream hazard. Dam safety statutes are enumerated in Idaho Code 42-1709 through 42-1721. The definition of height to be used for determining compliance with Idaho Code is measured vertically from the natural bed of the stream or watercourse at the downstream toe of the barrier to the maximum water storage elevation. Hydraulic structures greater than or equal to ten (10) feet height and reservoirs that impound a volume of water greater than or equal to fifty (50) acre-feet are regulated by the IDWR Dam Safety Program for benefit of public safety, unless specifically exempted per Idaho Code 42-1711. Note that regardless of size, any water storage embankment may be regulated for public safety if IDWR determines that the potential failure consequences would result in significant damage to downstream life or property.