U.S. Energy Corp is a Riverton, Wyoming based company that invests in natural resource properties such as molybdenum, oil and gas and geothermal energy. The company specializes in acquiring properties and adding value before seeking investors or partners to begin producing natural resources. U.S. Energy has been the primary owner of the Mt. Emmons molybdenum deposit for more than three decades. The company holds approximately 350 acres of patented mining claims and has staked more than 6,000 acres of unpatented claims above Crested Butte. U.S. Energy Corp owns and operates the Keystone Mine Water Treatment Plant that treats mine drainage before discharging water into Coal Creek.