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cs-cor:s ~~s CV, 11-73 ~~~' -'ODE CONS le-S INVENTORY & EVALUATION U 5 DERARiv[nl p/ AGRILURURE SUIL LDniLRVAiIDn SE PYIC[ INDIVIDUAL * GROUP UNIT OF GOVERNMENT REQUESTED BY Richard 6achman LOCATION Lots 2 & 3 Sec. 34,T1N, 6y Jac a ey R93w ASSISTED BY Alvin L. Jones, District Conservationist DATE A ril 4, 1980 SITUATION: You requested soil and vegetative data for use in applying for a Colorado Nined Land Reclamation permit (Exhibits 16 J) for a proposed gravel pit. INFORMATION PROVIDED: Following are descriptions, interpretations, recommendations and a map for the mine area, concerning soil and vegetative data: Exhibit I - Soil Information. Two soil types have been mapped within [he area of the proposed gravel pit, mapping units 71C and X62. a) Soil unit 71C, Forelle loam, 3 to 8 percent slopes. This is a deep, well drained soil occurring on upland mesas and sideslopes. The permeability of the soil is moderate, with a high water holding capacity. The surface layer is typically I[ inches of loam. The upper subsoil is a clay loam, about 12 inches thick. The lower 5 inches of subsoil is a calcarcous loam. The substratum is a loam extending to 60 inches or more. The surface and upper subsoil layers are good sources of topsoil and should be saved and stockpiled for later use in reclaiming [he site. The surface runoff is medium, resulting in a slight erosion hazard, unless the soil is significantly disturbed. b) Soil unit X62, Calciorthids-Tridell complex, 6 to 50 percent slopes. This mapping unit is a complex of two soil types, which are interspersed. The Calciorthids portion comprises approximately 55 percent of this complex. It is a moderately deep to deep, well drained, very gravelly and cobbly soil. The surface layer is gravelly and/or cobbly loamy, clay loams, or sandy loamy about 2 to 5 inches [hick. The underlying material is a highly calcareous, very gravelly and cobbly loamy, sandy loamy, or loamy sands to depths of 30 inches or more. Permeability is moderately rapid to rapid, with a low available water capacity. The surface runoff is medium to rapid, resulting in a medium erosion hazard. The Tridell portion, is a deep'a/ell, drained sail. Typically the surface layer is a loam about 6 inches thick. The subsoil is clay loam, 5 inches thick. The lower subsoil is a calcareous gravelly, cobbly loam.