PERMFILE71374 - Laserfiche WebLink

Home Browse Search

developed with a thick, dark colored surface horizon and subsoil clay accumulation. This • soil has a thicker mollic epipedon than Buckskin and the argillic horizon occurs at a shallower depth than Routt. The recommended topsoil salvage depth is based solely on the thickness of the surface mollic epipedon and transitional horizons since subsurface clay levels ere unsuitable. Topsoil salvage should be terminated at the top of the argillic horizon. The mean in si t~ suitable topsoil depth for 6 profiles is 28 inches (Appendix 9-6). The SOC and SOD map units consist of 85 percent Cochetopa with 8 percent Routt and 7 percent Buckskin inclusions (Appendix 9.2, Table 1). A 2.0-foot mean salvage depth was used for Map Units SOC and SOD to calculate recoverable topsoil volumes listed in Table 21-t and Exhibit 9-t. This topsoil salvage depth figure accounts for inclusions and topsoil loss during salvage due to brush clearing. VSOD-Cochetopa Variant (moderately deep) Loam. This map unit is found on moderately steep convex-shaped upper sideslopes of ridges. The soil profile is moderately deep and well developed with a thick, dark colored surf ate horizon and subsoil clay accumulation. The soil has a higher subsoil clay content than Foidel. Cochetopa soils have a deep profile. • The recommended topsoil salvage depth is based exclusively on the thickness of [he surface mollic epipedon and transitional horizons since subsurface clay levels ere unsuitable. Topsoil salvage should be terminated et the top of the argillic horizon. The mean in situ suitable topsoil depth for 2 profiles is 19 inches (Appendix 9-6). The VSOD map unit consists of 85 percent Cochetopa variant with 8 percent Cochetopa and 7 percent Foidel inclusions (Appendix 9-2, Table 1). A 1.5-foot mean selvage depth was used for this map unit to calculate recoverable topsoil volumes listed in Table 21-1 and Exhibit 9-1. This topsoil salvage depth figure accounts for inclusions and topsoil loss during salvage due to brush clearing. 53C, 53D, 53E, 53f-Yinevada Loam. 4inevada loam is located on strongly sloping to very steep concave-shaped, bedrock controlled sideslopes end swales. The soil profile has e thick, dark colored surface horizon which directly overlies sandstone bedrock at 20 to 40 inches. Adjacent soils ere shallower (spl itro), deeper (COUtis), have more profile • development with subsoil clay accumulation (Foidel), or have a light colored surface horizon (starman and Roxal variant). 1a Revised 04/24/91