Mines Management Reports On Development Progress 
 

SPOKANE, WA - Mines Management, Inc. reported that on April 4, 2011, the Company completed an underwritten public offering of 5,120,000 shares of common stock that yielded net proceeds of approximately $15.1 million. The Company intends to use the net proceeds for advancement of the permitting process for its Montanore Project, the commencement of the Company's planned delineation drilling program which will include advancement of the adit, establishment of drilling stations and commencement of exploratory drilling, and for general corporate purposes, including possible acquisition and exploration of new mining properties.

The Company engaged Mine and Quarry Engineering Services, Inc. of San Mateo, California (MQES) to prepare a Technical Report entitled "Technical Report: Preliminary Economic Assessment, Montanore Project, Montana, USA prepared for Mines Management, Inc." dated February 3, 2011 (PEA), in compliance with guidelines under Canadian National Instrument 43-101 ("NI 43-101"). The Company announced the PEA results on December 22, 2010. The U.S. Forest Service (USFS) and the Montana Department of Environmental Quality (MDEQ) continued their environmental review, and are in the process of formulating responses to comments received from the public and from Environmental Protection Agency (EPA) on the Draft Environmental Impact Study (EIS) for the Montanore Project. Permitting Milestones achieved in 2010 included selection by the government agencies of the preferred alternative for the transmission line proposed for the Montanore Project, announced on October 8, 2010, and completion of a study to monitor the grizzly bear in the Montanore Project area, which is located in a portion of the Cabinet/Yaak Ecosystem recovery area, announced on August 8, 2010. Mines Management continued meetings with federal and state agencies, Montana legislators, and local Lincoln County Commissioners, Libby City officials, business leaders and community members. The Company continued its program to reduce expenditures and conserve cash pending the completion of permitting. In 2011, Mines Management plans to continue to focus on planning for our exploration and delineation drilling program at the Montanore Project pending the final permitting approvals. The completion of the recent financing will provide sufficient cash to complete the permitting process and initiate the adit rehabilitation and drill station development. Additional financing will be required to complete the evaluation drilling program and a bankable feasibility study. Development activities could be deferred if the permitting process is delayed or if commodity prices make the project difficult to finance or increase the cost of such financing. The company's address is 905 West Riverside Ave.Suite 311,Spokane, WA 99201, 509-838-6050.