2014-09-15_PERMIT FILE - C1981018 (2)

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• SEDCAD NOTE EAST PORTAL AREA RECLAMATION DRAINAGE AREAS #1Z(a), 2Z(a) swS #1Z(a) Soils Moyerson stony clay loam/rock outcrop -Hydrologic soils group D. CN = 85 Sagebrush with grass understory in poor condition (very conservative). Soil K = 0.24 Taken from NRSC Soil Survey of Rio Blanco County L = 420 Length before runoff becomes channeled flow. Numerous drainage features within SWS. S=63 C = 0.007 From RUSLE 1.06 Precipitation data from Rangely, CO Clay loam, 63% slope, 5. Range, Length of segment 420', 40% rock cover, adjusted for ponding, 20 years to consolidation, time invariant, information from plant community and site potential, plant community - 7. Cold desert shrub, annual site production potential 650 Ibs.lac. (NRCS), canopy cover 20%, fall height 0.5 feet, roughness 1.1 (sagebrush), no mechanical disturbance, 20% veg. residue cover. • P=1.0 SWS #2Z(a) Soils Forelle loam and Rentsac loam- Hydrologic soils groups B & C respectively (topsoil source). HSG 'B' used since Rentsac 'C' grouping is due to restrictive layers. This impeding layer would not be present on non-compacted fill, thus justifying the 'B' grouping. CN = 86 Cultivated Ag land, fallow, bare soil (extremely conservative - no credit allowed for contouring with fallow). Soil K = 0.28 0.28 for Forelle and 0.24 for Rentsac -Table II-I-2. (0.28 used) L = 160 Length before runoff becomes channeled flow. S = 17.5% C = 0.328 From RUSLE 1.06. Precipitation data from Rangely, CO, clay loam, 17.5% slope, 5. Range, Length of segment 160', 10% rock cover, adjusted for ponding, 20 years to consolidation, time invariant, information from plant community and site potential, plant community - 14. Pasture/weeds, annual site production potential 100 Ibs.lac, canopy cover 5%, fall height 0.5 feet, roughness 1.3 (rootplowed), mechanical disturbance, 0% veg. residue cover. •