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COLORADO QUARRIES, INC <br /> 270 S 15th Street <br /> Canon City, CO 81212 <br /> RC���� <br /> Tim Cazier FEB 0$ZOZZ <br /> Colorado Division of Reclamation, Mining &Safety <br /> 1313 Sherman St, Room 215 DIVISION OF RSCLAMA"ON <br /> Denver, CO 80203 MINING AND SAFETY <br /> January 28, 2022 <br /> Re: Technical Revision, Mica White, #M-1992-058 <br /> Mr. Cazier, <br /> After meeting with Darin Duran of Cesare and receiving his geotechnical report on the stability <br /> issues at the Mica White pit, Colorado Quarries shall proceed with modifying the mining plan <br /> as follows: <br /> 1. All mining shall be performed from the top of pit and fed down to crusher pad. <br /> 2. No mining or excavation will occur on bottom of wall or toe of slope, which could upset <br /> stability of the mine face. <br /> 3. Daily visual monitoring will be performed by crusher crew on lower mine faces for <br /> movement or raveling. Upper limits will be visually monitored by miners feeding material to <br /> crusher. <br /> 4. Any instances of toppling blocks will be remedied by removing or sloping for safety <br /> concerns. <br /> 5. The crack in the access road will be monitored on a regular basis. There should be no <br /> more issues with it if we continue unloading the top of the pit wall and not disturbing the <br /> toe. <br /> In discussions with Darin Duran of Cesare, it was determined that unloading the top(above <br /> crack) and mining top-down, and feeding mined material over lower bench, and avoiding <br /> further mining or disturbance to the lower face, the stability issue should be curtailed. <br /> If you have any questions, please feel free to contact me at the address above or call me at <br /> 719-588-7916. <br /> n <br /> ou <br /> jo <br /> Bill Tezak <br /> Colorado Quarries Inc. <br />