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V COLORADO <br />A);— Division of Reclamation, <br />Mining and Safety <br />Department of (Natural Resources <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />April 27, 2015 <br />Mr. John S. Hamrick <br />Cotter Corporation <br />7800 E. Dorado Place Suite 210 <br />Englewood, CO 80111 <br />l <br />Re: Schwartzwalder Mine, Permit No. M- 1977 -300, Technical Revision Approval, Revision <br />No. TR -22 <br />Dear Mr. Hamrick: <br />On April 27, 2015 the Division of Reclamation, Mining and Safety approved the Technical <br />Revision application submitted to the Division on March 25, 2015, addressing the following: <br />Install grout curtain at the Sump 10 Area. ' <br />The terms of the Technical Revision No. 22 approved by the Division are hereby incorporated into <br />Permit No. M- 1977 -300. All other conditions and requirements of Permit No. M- 1977 -300 remain <br />in full force and effect. <br />If you have any questions, please contact me at (303)866 -3567 x8116. <br />Sincerely, <br />Michael A. Cu ingham <br />Environmental Protection Specialist <br />CC: Tony Waldron, DRMS <br />Wally Erickson, DRMS <br />• <br />1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 http: / /mining.state.co.us <br />John W. Hickenlooper, Governor I Mike King, Executive Director I Virginia Brannon, Director <br />