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COLORADO <br /> Division of Reclamation, <br /> AV Mining and Safety <br /> Department of Natural Resources <br /> 1313 Sherman Street,Room 215 <br /> Denver,Colorado 80203 <br /> December 16,2016 <br /> Mr. Michael B.Toelle <br /> Holcim(US)Inc. <br /> 3500 Highway 120 <br /> Florence,CO 81226 <br /> Re: Boettcher Limestone Quarry,Permit M-1977-348,Technical Revision Approval,Revision TR07 <br /> Mr.Toelle: <br /> On December 16,2016 the Division of Reclamation, Mining and Safety approved the Technical Revision application <br /> submitted to the Division on November 7,2016,addressing the following: <br /> Revision to change required groundwater monitoring frequency from quarterly to semi-annually <br /> The terms of the Technical Revision TR07 approved by the Division are hereby incorporated into Permit M-1977-348. <br /> All other conditions and requirements of Permit No. M-1977-348 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 /> Enclosure <br /> OF C010 <br /> 1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 http://mining.state.co.us mew �90 <br /> John W. Hickentooper, Governor I Mike King, Executive Director I Virginia Brannon, Director I "r � ' o <br /> 1876 <br />