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DIVISION OF RECLAMATION, MINING AND SAFETY <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />Phone: (303) 866 -3567 <br />FAX: (303) 832 -8106 <br />June 7, 2012 <br />Ms. Julie Mikulas <br />Martin Marietta Materials, Inc. <br />1800 N. Taft Hill Rd. <br />Fort Collins, CO 80521 <br />Re: Lyons Pit, Permit No. M- 1974 -015, Technical Revision Approval, Revision No. TR -1 <br />Dear Ms. Mikulas: <br />On June 7, 2012 the Division of Reclamation, Mining and Safety approved the Technical Revision <br />application submitted to the Division on May 31, 2012, addressing the following: <br />Revise Reclamation Plan to include design specifications for the slurry wall around Lake <br />No. 4 <br />The terms of the Technical Revision No. I approved by the Division are hereby incorporated into <br />Permit No. M -1974 -015. All other conditions and requirements of Permit No. M- 1974 -015 remain <br />in full force and effect. <br />If you have any questions, please contact me at (303)866 -3567 x8116. <br />Sincerely, <br />Au <br />Mined Land Reclamation <br />Michael A. Cunningham <br />Environmental Protection Specialist <br />CC: Tom Kaldenbach, DRMS <br />STATE OF COLORADO <br />COLORADO <br />D I V I S I O N O F <br />RECLAMATION <br />MINING <br />— &— <br />SAFETY <br />John W. Hickenlooper <br />Governor <br />Mike King <br />Executive Director <br />Loretta E. Pineda <br />Director <br />Office of Office of <br />Denver • Grand Junction • Durango Active and Inactive Mines <br />