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SEDCAD NOTES <br />REFUSE AREA #4 -RECLAMATION <br />Typical values <br />Soils: Primarily originating from Forelle (B), Turley (B), Potts (B), and Bowbac <br />(B}with limited salvage from Moyerson (D). Hydrologic soil group C was <br />used as a conservative estimate. <br />CN = 84 Cultivated ag. Lands -Small grain -straight row -poor condition. <br />Soil K = 0.28 From NRCS <br />L =various Measured <br />S =various Measured <br />C = 0.24 Mulch under construction -Straw, 1 ton/acre.... -Subsoil - 1 °lo and 30% <br />gradients <br />P = 1.0 <br />• Variations from `Typical' values <br />For Structure #1, RP-4 Sediment Pond, the following variables were used: <br />CN = 98 Elevated due to impervious nature of pond. <br />C = 0.10 Very little erosion. Much of area is already part of sediment storage area. <br />General Notes <br />Minor adjoining sections of watersheds with undisturbed or miscellaneous <br />contributions included in analysis acreages. <br />Model sensitivity to 'C' and associated sediment yield is low since sediment <br />retention structures were engineered to accept runoff from bare refuse. <br />Model conservative due to using worst case conditions with out consideration for <br />consolidation, plant growth, surface roughening, etc. <br />