U.S. Energy Corp. engages in the acquisition, exploration, holding, sale, and/or development of mineral properties. It primarily explores for molybdenum, and other base and precious metals. U.S. Energy company holds interests in Mount Emmons property that covers approximately 9,311 acres located in Gunnison County, Colorado. It also holds interests in oil and gas properties located in Williston Basin North Dakota and Gulf Coast region. In addition, the company holds interests in geothermal properties. Further, it develops multifamily apartment project in Gillette, Wyoming. As of December 31, 2009, its estimated proved reserves were approximately 1,086,203 BOE. The company was founded in 1966 and is based in Riverton, Wyoming.