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TABLE 21-4 <br /> Topsoil Quantities and Characteristics by Soil Type <br /> Nucla East Mine, Montrose County, Colorado <br /> Mapping Unit Affected Mean Salvage Thickness Mean Salvage Volume <br /> Designation Area of Topsoil (feet) of Topsoil (Acre-feet) Topsoil Salvage Limitations <br /> (Symbol) (Name) (Acres) (Lift 1) (Lift 2) (Mixed) (Lift 1) (Lift 2) (Mixed) <br /> 1E Travessilla - Pinon 31.8 0.0 0.0 0.8 0.0 0.0 25.4(1) Very shallow to shallow sandstone <br /> Channery Sandy Loams Complex bedrock, coarse fragment content <br /> 1EW Lithic Haplaquolls 8.6 0.0 0.0 1.2 0.0 0.0 10.3(1) Very shallow to shallow sandstone <br /> bedrock, very shallow ground water <br /> 30C Progresso-Bond Complex 27.2 0.8 1.3 0.0 21.8 35.4 0.0 Shallow sandstone bedrock and high <br /> calcium carbonate content <br /> 1 0 8 3.5 0.0 14.8 64.8 0.0 High calcium carbonate content and <br /> i <br /> D708 Barx Sandy Loam Barx 8.5 9 <br /> o Scalped Barx Buried Complex moderately to strongly alkaline pH <br /> values at variable depths, moderate <br /> EC <br /> II <br /> 808 Lithic-Typic Haplaquolls 16.7 0.0 0.0 2.4 0.0 0.0 40.1 Very shallow to deep sandstone <br /> Shallow to Deep bedrock, very shallow ground water <br /> 810 Typic Haplaquolls, Deep 16.2 0.0 0.0 0.0 0.0 0.0 0.0 High calcium carbonate levels, very <br /> shallow ground water <br /> DL Disturbed Land 4.3 0.0 0.0 0.0 0.0 0.0 0.0 Roads, ponds, residences, and farmyards <br /> <• (2) (2) (1) <br /> TOTAL 123.3 - - - 36.6 100.2 75.8 <br /> Ln <br /> (D <br /> d <br /> 00 (1)These soils will not be segregated by individual soil horizons. These soil resources will primarily be utilized, whenever feasible, in postmine <br /> G dry pastureland areas (13.6 acre-feet, one foot replacement depth) and as topsoil or subsoil for irrigated pasture areas (62.2 acre-feet) <br /> ono (2) <br /> co These soil resources will primarily be utilized in postmine prime farmland hayland areas (first lift = 15 acre-feet, one foot replacement depth <br /> and second lift = 45 acre-feet, 3-foot replacement depth) and irrigated pasture areas (76.8 acre-feet). The combined replacement depth for <br /> irrigated pastureland areas will be [(76.8+62.2)/92.5] 1.5 feet. Postmine roads comprise 2.2 acres. <br />