DENVER, Jan. 04, 2017 (GLOBE NEWSWIRE) -- U.S. Energy Corp. (Nasdaq:USEG) (the "Company") announced today, January 4, 2017 the extension of its exclusive rights to participate with IronHorse Resources, LLC ("IronHorse") in the Wattenberg Development Project previously announced. The Company and IronHorse had entered into an Earnings and Participation Agreement dated September 14, 2016 (the "Agreement") as to the purchase of 40% of IronHorse's interest in five Wattenberg farmout agreements. The...