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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 />August 24, 2012 <br />Mrs. Connie Davis <br />Aggregate Industries <br />1707 Cole Blvd., Suite 100 <br />Golden, CO 80401 <br />Re: Technical Revision #1 Decision Date Extension, Hazeltine Mine, DRMS File No <br />M- 2004 -031 <br />Dear Mrs. Davis: <br />The Division is currently reviewing the additional supplemental technical information you <br />submitted on August 3, 2012, addressing Technical Revision # 1. The Division is in the <br />process of determining the efficiency of the pumping system. We are still waiting for a <br />written estimate from a couple of pump suppliers as to the cost and efficiency of the pump <br />you selected. Once the information is received, the Division will adjust the cost as <br />warranted and approve the Technical Revision. The new decision date for the revision is <br />September 20, 2012. Your written 30 day decision waiver was received by the Division on <br />5/22/12. <br />If you have questions, please contact me at 303 866 3567 ext. 8129. <br />Sincerely, <br />Be an Keffele <br />Environmental Protection Specialist <br />CC: Tom Kaldenbach <br />Tony Waldron <br />Office of <br />Mined Land Reclamation Denver • Grand Junction • Durango <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 <br />Active and Inactive Mines <br />