On July 17 and 18, 2016, a fast-moving, naturally caused wildfire burned over the 360-acre Edgemont, South Dakota, Uranium Mill Tailings Radiation Control Act (UMTRCA) Title II disposal site. The U.S. Department of Energy Office Legacy Management (LM) learned of the event early July 19, 2016, from a local rancher, whom LM permits to graze cattle on the site in return for fence maintenance and reporting local events that affect the site.