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Table E-1 <br />Surface Hy_drology characterization <br />Gold Rasin.Mine <br />Cache Creek, Chaffee County, Colorad <br />General Cache Creek Drainage Characteristics Figure E-1 a Cache Greek Prainaze <br />Delineation <br />Hydrologic Soil Unit - Bross Soil Series- Group B (SCS, 1975) <br />Group B Soils with moderate infiltration rates when thoroughly wetted. These consist chiefly of <br />soils that are moderately deep to deep, moderately well drained to well drained with moderately <br />fine to moderately course textures. These soils have a moderate rate of water transmission (final <br />infiltration rate of 0.15 to 0.30 inch). (Wilkes et al. 1975) <br />Bross Soil Series Curve Number =60 (Wilkes et al, 1975) (SCS, 1975) <br />60% Grass Cover Density <br />Hydrologic Soil Group = B (SCS, 1975) <br />Design Storm (U.S. Department of Commerce, 1961) <br />2, year -24 hour storm event= 1.5 inches; <br />5 year -24 hour storm event= 2.0 inches; <br />10 year -24 hour storm event= 2.6 inches; <br />25 year-24 hour stornâ–ş event =3.0 inches; <br />100 year -24 hour storm event= 4.2 inches <br />Steep Slopes within the study area are greater than 8 % and above <br />December 28, 2014 <br />Colorado Division of Reclamation Mining and Safety <br />Gold Basin Mine, Inc. <br />Gold Basin Mine <br />Granite, Colorado <br />L i1h, <br />CU <br />