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COLORADO <br /> Division of Reclamation, <br /> Mining and Safety <br /> 1313 Sherman Street, Room 215 <br /> Denver,Colorado 80203 <br /> August 23,2018 <br /> Mr. Stan Opperman <br /> Asphalt Paving Company <br /> 14802 W 44th Ave <br /> Golden, CO 80403 <br /> Re: Ralston Quarry,Permit M-1974-086,Technical Revision Approval,Revision TR01 <br /> Mr. Opperman: <br /> On August 23, 2018 the Division of Reclamation, Mining and Safety approved the Technical Revision application <br /> submitted to the Division on August 22,2018,addressing the following: <br /> Conduct geotechnical stability assessment on west slope of ridge to address long term stability issues. <br /> Please note that the Division will require a long term factor-of-safety of at least 1.3 per the approved DRMS slope <br /> stability policy—not 1.2 as stated in the provided Ground Engineeringproposal <br /> With the exception of the item listed above, the terms of the Technical Revision TRO1 approved by the Division are <br /> hereby incorporated into Permit No. M-1974-086. All other conditions and requirements of Permit No. M-1974-086 <br /> remain in full force and effect. <br /> If you have any questions,please contact me. <br /> Sincerely, <br /> Eric C. Scott <br /> Environmental Protection Specialist <br /> 1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 http:l/mining.state.co.us T <br /> John W. Hickenlooper, Governor I Robert W. Randall, Executive Director I Virginia Brannon, Director <br /> ♦ s <br /> +876 <br />