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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 />June 15, 2015 <br />Mrs. Sandra K. McDonald <br />City of Arvada <br />8101 Ralston Rd <br />Arvada, CO 80001 <br />Re: Leyden Pit, Permit No. M-1983-139, Technical Revision Approval, Revision No. TR -3 <br />Dear Mrs. McDonald: <br />On June 15, 2015 the Division of Reclamation, Mining and Safety approved the Technical Revision <br />application submitted to the Division on May 1, 2015, addressing the following: <br />Revise Reclamation Plan to allow for the following: all slopes backfilled to 3H.•1 V, backfill and <br />breach sediment ponds, allow for internal access roads to remain, replace topsoil at a depth of 2 " - <br />4 ", use Dryland Pasture seed mix for vegetation establishment. <br />The terms of the Technical Revision No. 3 approved by the Division are hereby incorporated into Permit No. <br />M-1983-139. All other conditions and requirements of Permit No. M-1983-139 remain in full force and <br />effect. <br />If you have any questions, please contact me at (303)866-3567 x8116. <br />Sincerely, <br />k 4 U - <br />Michael A. Cgham <br />Environmental Protection Specialist <br />CC: Wayne Brantley, Pioneer Sand Company, Inc. (via email) <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 />