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The main applicable United States Geological Survey geologic map for the site is from 2002. <br /> The area of the Peak Rach Resource was mapped by Scott, et al (2002)2 as consisting of <br /> unconsolidated Quaternary alluvium and stream gravels (Holocene)underlain by Upper <br /> Cretaceous Mancos Shale. <br /> 7_2 Geology and Resource Discussion <br /> Experience at the neighboring 23 Road Pit and details of a Natural Resources Conservation <br /> Service (MRCS) site-specific soil report(Exhibit I) indicate that the deposit is approximately 15 <br /> to 20 feet deep with an overburden of 0 to 7 feet and 0 to 24 inches of topsoil in the area of the <br /> deposit. Material balances for reclamation purposes will be calculated using a topsoil depth of 12 <br /> inches. Overburden depth for material balances purposes is assumed to be six feet. <br /> Due to the presence of Mancos Shale as the bedrock for the site,mining will not proceed to <br /> bedrock. It will stop at least two feet above the shale to prevent its exposure. <br /> 8. Primary and Secondary Commodities <br /> The operation will produce raw materials including sand, gravel, and rock. These materials will <br /> all be crushed/screened onsite and then shipped off processed material. If any large boulders are <br /> found at the 23 '/4 West Pit site,they will be direct shipped to customers using 23 '/4 West Pit <br /> dump trucks. <br /> Excess overburden will be sold from the site as fill. Excess topsoil may be shipped offsite for use <br /> improving reclamation on nearby sites. <br /> Elam will clearly mark the permit/affected area boundary with stakes surveyed on site. <br /> No designated chemicals or acid-producing materials to be used or stored on-site. <br /> 'Scott,R.,Carrara,P.,Hood,W.,&Murray,K.(2002).Geologic Map of the Grand Junction Quadrangle, Mesa <br /> County, Colorado. Denver,CO: United States Geological Survey. <br /> 23 114 West <br /> July 2020 D-6 GnX LewirAi and,1tx�ciatcs,NI.L(' <br />