2015-10-06_PERMIT FILE - C1981019A (3)

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Table 2.04.9-20 Soil Map Unit Descriptions (continued) oxt-' Subsoil F�L 21 These soils formed from loess deposited over shale and Rhone v. - Thick Phase Loam & Silt High coarse fragments at ts and clay Soils with deeper loess deposits (Lamphier) and some sandstone colluvium This colluvial material is 49 10-35 (Fine-Loamy/Loamy-Skeletal) 90 Loam 20 I'> depths between 24 and 36 inches argillic horizon development (Cochetopa) are present, frequently present within the textural control section but non -limiting within the proposed salvage depths The unit primarily occurs on northwest -facing slopes in the southern portion ofthe project area This unit occurs on slopes with shallow loess Rhone v - Thin Phase High coarse fragments and clay at Non-linuting soils include coarser soils (Skyway) and accumulation over sandstone colluvium and bedrock so 20-50 (Fine-Loamy/Loamy-Skeletal) Loam 12 15 depths between 12 and 24 inches, soils developed from deeper loess deposits In the northern portion ofthe project area, this unit more more below 27 inches (Lam phier) Jerry is also likely present. only occurs on steep north facing (shaded) slopes where the temperature regune is likely cryic- Rhone v -Thick Phase 40 16 30 High rock content and less (Fine -Loam y/Loam v -Skeletal) — nutrients at depth Thinner loess deposits and shallower depth to the This unit occurs on relatively less steep west facing High clay content and rock 51 20-35 Lown parent materials result in non-pachic inclusions such Cochetopa 40 12 24 fragments in subsoil and more as Jerry and Thornburgh slopes with notable shale influences beyond 36mches Rhone v - Thin Phase40 Loam 15 6 High clay and coarse fragments 1 Pachic and non-pachic soils with argillic horizons This soil occurs on narrow ridges between north -south( 52 10-35 Fine-Loam-Skeletall) within 20 inches (Owen Creek and Cochetopa) and deeper oriented drainages in the southern end ofthe study Shallow Haplocryalfs; 40 Clay Loam 6 15 — Subsoil has high clay content with little profile development beyond Haplocryalfs are present All inclusions are less area Variable loess deposits over shallow shale result limiting than the shallow Haplocryalfs. in the complex. 20 inches Thinner loess deposits and shallower depth to the This map unit occurs on very steep slopes and is Subsoil is the transition from loess parent materials result in non-pachic inclusions such comprised of loamy loess over weakly altered 53 25-75 Rhone 65 Silt Loam 24 12 to colluvium and bedrock below as Jerry and Thornburgh. Some accumulations of loess colluvium. There is a notable discontinuity in the are 40+ inches thick and sumlar to Lamphier profile at this break with a thin transition to the unaltered colluvial materials High clay content and coarse This unit is found ridge tops where residual sandstone 54 0-25 Owen Creek (Shallow) 70 Loam& Clay 8 12 fragments in the subsoil Similar, but lithic soils are present in this unit, as are and shale have weathered to produce frequently Loam Frequently shallow depths (16-20 deeper inollisols (Jerry) shallow soil with high clay content Sandstone coarse inches) to sandstone or shale- fragments are found in many ofthe soils. 55 0-35 Owen Creek 60 Loam 10 20 High clay content and rock Some soils in this unit have pachic epipedons (Cochetopa) and others are loamy -skeletal Few lithic These soils are located on complex slopes derived fragments in the subsoil profiles present from mixed colluvium with a thin covering of loess Jerry 50 12 11 Known high clay content and This unit occurs in the Order III survey area only Map 56 25-70 Itkely high coarse fragments at Similar soils unit properties determined from the NRCS survey for depth Moffat County Cochetopa 35 1 High clay content and shale Soils with horizons not classified as ar&illic are more Loess deposited over shale colluvium dominates the Loam & Silt co Iluvium/residuum in subsoil and appropriately classified as Rhone in this unit. These parent material ofthis unit These soils form on ridges 57 0-35 Cochetopa 75 Loam ?0 12 more common at depths below 32 soils are non-luniting Jerry and Thornburgh may also and gentle slopes where weathering has formed true inches be present. argillic horizons in the subsoil (i e , loess -colluvium interface).