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COLORADO <br />Division of Reclamation, <br />Mining and Safety <br />Department of Natural Resources <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />May 19, 2015 <br />Ms. Connie Davis <br />Aggregate Industries - WCR, Inc. <br />1687 Cole Blvd., Suite. 300 <br />Golden, CO 80401 <br />Re: Platte Valley Operation, Permit No. M-1989-120, Technical Revision Approval, <br />Revision No. TR -04 <br />Ms. Davis, <br />On May 18, 2015 the Division of Reclamation, Mining and Safety (Division/DRMS) approved the <br />Technical Revision application submitted to the Division on March 18, 2015, addressing the <br />following: <br />Mining Phase 2 plan to achieve compliance with permit approved requirements for <br />intermittent backfilling to establish a 200 feet offset adjacent to the Platte River. <br />The terms of the Technical Revision No. 4 approved by the Division are hereby incorporated into <br />Permit No. M-1989-120. All other conditions and requirements of Permit No. M-1989-120 remain <br />in full force and effect. <br />If you have any questions, please contact me at (303) 866-3567 Ext. 8124. <br />Environmental Protection Specialist <br />Cc: Wally Erickson, DRMS <br />oF' foto <br />(--'nA <br />1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 http://mining.state.co.us I*; <br />John W. Hickenlooper, Governor I Mike King, Executive Director I Virginia Brannon, Director I *,� 8 * <br />