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<br />• Typically, the surface layer (A horizon) is very dark grayish brown silt loam <br />about II inches thick. The upper subsoil (B horizon) is very dark grayish <br />brown silt loam about 7 inches thick. The middle subsoil (B horizon) is dark <br />yellowish brown silty clay about 21 inches thick. The lower subsoil (B hori- <br />zon) is yellowish brown silty clay about 7 inches thick. The substratum (C <br />horizon) is yellowish brown silty clay to a depth of 60 inches or more. The <br />soil permeability is slow and the available water capacity is moderate. The <br />effective plant rooting depth is 60 inches or more. Surface runoff is very <br />slow to slow. The water and wind erosion susceptibility of this soil when <br />disturbed is high. <br />Topsoil will be handled using a single lift salvage and replacement method. <br />The 18-inch dark colored surface (A) and upper subsoil (B) horizons will be <br />salvaged. This material exhibits the most favorable saturation percentage, <br />organic matter content, texture, and structure for tillage and seedbed pre- <br />paration (Table I-5). Topsoil salvage will be discontinued should soil layers <br />with greater than 45 percent clay be encountered. <br />• The stripping depth range can be easily identified in the field by color dif- <br />ferences. The A and upper B horizon material has a color of very dark <br />grayish brown compared to dark yellowish brown for the unsuitable middle <br />subsoil material. The middle and lower subsoil and substratum or overburden <br />material are not to be salvaged because of high saturation percentages <br />(>60%), and many white violently effervescent salt deposits. <br />This soil type occupies 28.2 percent (26.4 acres) of the permit area and 33.1 <br />percent (22.9 acres) of the proposed disturbance area. Therefore, 34.4 acre- <br />feet of suitable topsoil will be salvaged from this soil type. <br /> <br />