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Sedcad Notes: <br />• <br />• <br />• <br />Southern edge of Slot Storage staging area. <br />Soils -Cushman silt loam HSG = B, K = 0.24. per NRCS and Table I-2 page II.I-18. <br />Structure #1 - slope <br />CN = 71 Pasture, grassland, or range -continues forage for grazing. Fair condition. <br />C = 0.0127 From RUSLE 1.06 <br />• Time invaziant <br />^ Veg. information based on (1) plant community & site potential <br />^ Desert grassland <br />• 500 lb/ac annual production -dry basis (from NRCS). <br />^ 20% canopy cover -conservative estimate <br />• 0.5' fall height <br />^ 17 years since last disturbance <br />• 1.0" roughness -mixed grass prairie. <br />^ 50% ground cover -conservative estimate <br />^ Land use - (8) disturbed fill, topsoil, no rock cover <br />P=1.0 <br />L = 35' width of azea <br />S = 25% measured <br />Area = 0.47 acres measured <br />Structure #2 -Grass filter <br />Roughness Coefficient: 0.0096 -lowest value in SedCAD for fescue -closest match <br />Hydraulic spacing: 4 inches -conservative estimate <br />Grass height: 4 inches -conservative estimate <br />Grass stiffness 20 N per sq. meter -native grass mixture <br />Infiltration rate: 0.20 inches per hour -hydrologic soil class B <br />Length: 5 feet -conservative estimate <br />Width: 600 feet -toe of slope <br />Slope: 6% conservative estimate <br />