Via IRE – “The National Inventory of Dams (NID) contains records on dams in all 50 states, kept by the U.S. Army Corps of Engineers.
Dams are included if they meet at least one of the following criteria:
— High hazard classification – loss of one human life is likely if the dam fails,
— Significant hazard classification – possible loss of human life and likely significant property or environmental destruction,
— Equal or exceed 25 feet in height and exceed 15 acre-feet in storage,
— Equal or exceed 50 acre-feet storage and exceed 6 feet in height.”