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• <br /> <br />r~ <br />~~ <br />TR-37 <br />Yoast Mine <br />Pond 012I012A System <br />H`(DROLOGIC Id~1PUT PARA~a1ST1=RS <br /> SEDCAD 4 <br /> Pond 012A <br /> Watershed ID -Structure 11 - SWS1 <br />~P/atershed Area: 3.8 <br />Curve Number: <br />HYDROLOGIC <br />CURVE, <br />AREA <br />WATERSHED TYPE VEGETATION COVER SOIL GROUP NUMBER (acres) <br />Reclaimed Topsoiled, No Vegetation B 71 3.2 <br /> Good (>70%) B 30 0.6 <br />AspeniMountain Shrub <br /> 3.8 <br />Total <br /> CURVE NUMBER 65 <br /> SEDCAD 4 <br /> Pond 012A <br /> Watershed ID -Structure 11 - SWS2 <br />Pond surface <br />~Natershed Area: 1.5 <br />Curve Number: <br />HYDROLOGIC CURVE <br />AREA <br />WATERSHED TYPE VEGETATION COVER SOIL GROUP NUMBER (acres) <br />Pond Water surface NIA 99 1.5 <br /> 1.5 <br />Total <br /> CURVE NUMBER 99 <br />Vegetation cover conditions presented in Tab 10, Vegetation, Attachment 10-1, 1990/1992 Vegetation <br />Baseline Report, Yoast Study Area (ESCO Associates, 1993). Approved Yoast Mine curve numbers are <br />presented in Attachment 13-12, Postmining Drainage and Sediment Control ,Table 13-12.1. Values were <br />adapted from Urban Hydrology for Small Watersheds, Technical Release No. 55, Soil Conservation Service, <br />1986. <br /> SEDCAD 4 <br /> 012A <br />Pond <br /> _ <br />Watershed ID -Structure 11 - SWS1 <br />Sedimentology: k factor AREA <br />SOILS MAP UNIT/SOILS <br />SERIES <br />HYDROLOGIC SOIL GROUP k FACTOR acres <br />( ) <br /> g 0.32 3.20 <br />Reclaimed <br />B 0.28 <br />0.6 <br />66DlE/F - Foidel loam 3.8 <br />Total <br /> Weighted k Factor 0.31 <br />13-12.1-192 <br />Revised 08108 <br />