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SWS3 <br />• 20 MILE COAL COMPANY <br />POND D • DESIGN CHECK <br />HYDROLOGIC INPUT PARAMETERS <br />WATERSHED ID: SEDCAD+ <br />WATERSHED ID <br />Pond D -SWS2 fracture 1 ~ SWS2 <br />Watershetl Area <br />62.0 acres <br />Curve Number: <br />WATERSHED <br />TYPE VEGETATION <br />COVER HYDROLOGIC <br />SOIL GROUP CURVE <br />NUMBER AREA <br />(acres) <br />Refuse Pile None C 8b 62A <br />WEIGHTED CURVE NUMBER: 86 <br />Soll Erodibility Factor (K): <br />r 1 <br />SOIL ERODIBILITY FACTOR <br />SOIL <br />TYPE AREA <br />(acres) K <br />FACTOR K'AREA <br />Refuse Material 620 0.75 9.30 <br />Weighted K Factor: O.t6 <br />Control Factor: <br />CONTROL FACTOR <br />CONTROL PRACTICE <br />CONDITION AREA <br />(acres) C <br />FACTOR C'AREA <br />Refuse Material 62.0 1.000 62.000 <br />Weighted C Factor: 1.000 <br />• Note: A practice (P) of 0.8 was used to represent terraces. <br />D-33 <br />