Mines Management, Inc. (Mines Management) is an exploration-stage company. The Company is engaged in the business of acquiring, exploring and developing mineral properties, primarily those containing silver and associated base and precious metals. The Company's mineral property interest, the Montanore Project, is held by its wholly owned subsidiaries, Newhi, Inc. and Montanore Minerals Corp. The Montanore Project is located in Sanders and Lincoln Counties in northwestern Montana and consists of 10 patented mining claims and 861 unpatented mining claims owned by the Company. The Montanore Project contains a strata-bound silver-copper deposit occurring in the Revett Formation, which is part of a series of Precambrian-aged metasedimentary rocks belonging to the Belt Supergroup. The Company also owns certain mining claims on zinc properties in northern Washington State, referred to as the Iroquois and Advance properties.