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SENECA II MINE <br />Pond 008 <br />HYDROLOGIC INPUT PARAMETERS <br /> SEDCAD 4 <br /> WATERSHED ID <br /> Structure 5 - SWS1 <br /> Subwatershed - V-Ditch #5 <br />Watershed Area: <br />16.7 <br />Curve Number: <br /> VEGETATION HYDROLOGIC CURVE AREA <br />WATERSHED TYPE COVER SOIL GROUP NUMBER (acres) <br />Reclaimed Fair (30 - 70%) C 71 16.7 <br />Total 16.7 <br /> CURVE NUMBER 71 <br />Curve number (CN) values used are approved Seneca II CN values (see Appendix 7-12, Postiming <br />Drainage Control). Values were adapted from Urban Hydrology for Small Watersheds, Technical Release <br />No. 55 (TR-55), Soil Conservation Service, 1986. <br />SEDCAD 4 <br />WATERSHED ID <br />Structure 5 - SWS1 <br />Subwatershed - V-Ditch #5 <br />Watershed Area: <br />16.7 <br />Sedimentology: k Factor and Control Factor <br /> VEGETATION HYDROLOGIC k CONTROL AREA <br />WATERSHED TYPE COVER SOIL GROUP FACTOR FACTOR (acres) <br />Reclaimed Fair (30 - 70%) C 0.16 0.043 16.7 <br />Total 16.7 <br /> 0.16 0.043 <br />The soil erodibility factor, "k-Factor", values were determined based on Seneca II soil survey infonnation (see Tab 9, <br />Exhibit 9-1, Soil Types and Sample Locations, and Attachmnet 9-6) as presented in Soils of Colorado, Loss Factors and <br />Erodibility, Soil Conservation Service, 1983. <br />The Control Factor values were adapted from the Yoast and Seneca II-W permit application packages. These values are <br />presented in each permit in the Drainage and Sediment Control Plan attachment, which is located in Tab 13 of the <br />respective permit documents. The values are based on Renard, et al. (Renard, K.G., Foster, G.R., Weesies, G.A., <br />McCool, D.K., and D.C. Yoder, coordinators, 1996. Predicting Soi! Erosion by Water. A Guide to Convention Planning <br />with the Revised Universal Soil Loss Equation (RUSLE). Agricultural Handbook 703. U.S. Department of Agriculture. <br />\_J <br /> <br /> <br />TR-42 7-6f.3A-22 Revised 09/07 <br />