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anticipated that no bedrock will be encountered. The water table is currently approximately 15 <br /> feet below the surface in the permit area. Should the water table be encountered during mining, <br /> four feet of backfill will be placed in the affected areas. <br /> The main applicable United States Geological Survey geologic map for the site is from 1979. <br /> The area of the Mystic Soil was mapped by Tweto(1979)z as consisting of unconsolidated <br /> Quaternary-Tertiary alluvium, sand, and gravel (Holocene)underlain by the Alamosa Formation. <br /> 7.1 Geology and Resource Discussion <br /> Operators experience in the area and the details of a Natural Resources Conservation Service <br /> (NRCS)site-specific soil report(Exhibit I)indicate that the deposit is at least 80 inches deep and <br /> consists of overburden and 12+inches of topsoil in the area of the deposit. Material balances for <br /> reclamation purposes assume that the top 12+inches of the deposit contain loam,making it <br /> suitable for topsoil. Two soil types are found on the majority of the site, Gunbarrel (Map symbol <br /> `31')and Mosca(Map symbol `50'). The Gunbarrel is described as having three horizons—HI, <br /> H2, and H3. The Gunbarrel horizon H1 is 0 to 5 inches: loamy sand, and the Gunbarrel horizon <br /> H2 is 5 to 28 inches: loamy sand. The Mosca is described as having three horizons—H1, H2, and <br /> H3. The Mosca horizon H1 is 0 to 8 inches: loamy sand, while the Mosca horizon H2 is 8 to 32 <br /> inches: loamy sand. Thus, approximately 28 inches of the Gunbarrel and 32 inches of the Mosca <br /> contain loam and therefore are suitable for topsoil. For the purposes of volume calculations 12 <br /> inches of topsoil is assumed and a maximum of five feet of`soil product'. Mining will not <br /> expose bedrock. <br /> 8. Primary and Secondary Commodities <br /> The operation will produce raw materials including sand, and mixed alluvium. These materials <br /> will be sold and shipped off-site. Crushing and screening are the only processing anticipated <br /> ZTweto, O.(1979). Geologic Map of Colorado 9:500 000. US Geological Survey. <br /> Mystic Soil <br /> ^ <br /> D-6 �•" <br /> November 2020 /1� '�"°""' *°''°' PI.t.i <br />