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Yoast Mine <br />/'/ Pond 012/012A System <br />~IYDROLOGIC INPUT PARAIYIETERS <br />C <br /> <br /> SEDCAD 4 <br /> Pond 012 <br /> Watershed ID -Structure 14 - SWS1 <br />Watershed Area: 9.9 <br />Curve Number: <br /> HYDROLOGIC CURVE AREA <br />WATERSHED TYPE VEGETATION COVER SOIL GROUP NUMBER (acres) <br />Reclaimed Fair (30% - 70%) B 71 3.12 <br />Aspen/Mountain Shrub Gcod (>70%) g 30 0.85 <br />Aspen/Mountain Shrub Goad (>70%) D 48 O.E6 <br />Sagebrush Good (>70%) D 55 0.59 <br />W. Wheatgrass/Alkali Sagebrush Fair (30% - 70%) p 89 1.29 <br /> No Vegetation <br />soiled <br />To B 86 3.42 <br />Disturbed <br />Total , <br />p 9'9 <br /> CURVE NUMBER 73 <br />SEDCAD 4 <br />Pond 012__ <br />Watershed ID -Structure 14 - SWS2 <br />Pond surface <br />Watershed Area: 1.2 <br />Curve Number: <br />HYDROLOGIC CURVE <br />AREA <br />WATERSHED TYPE VEGETATION COVER SOIL GROUP NUMBER (acres) <br /> Water surface NIA 99 1.2 <br />Pond <br />Total 1.2 <br />CURVE NUMBER 99 <br />Vegetation cover conditions presented in Tab 10, Vegetation, Attachment 10-1, 1990/1992 Vegetation Baseline Report, <br />Yoast Study Area (ESCO Associates, 1993). Approved Yoast Mine curve numbers are presented in Attachment 13-12, <br />Postmining Drainage and Sediment Control ,Table 13-12.1. Values were adapted from Urban Hydrology for Smalt <br />Watersheds, Technical Release No. 55, Soil Conservation Service, 1986. <br />• <br /> SEDCAD 4 <br /> Pond 012 <br /> Watershed ID -Structure 14 - SWS1 <br />Sedimentology: k factor <br />AREA <br /> HYDROLOGIC SOIL <br />SOILS MAP UNIT/SOILS SERIES GROUP k FACTOR (acres) <br /> B 0.32 3 12 <br />Reclaimed B 0'37 0•g <br />X8D/E!F - Winevada - Splitro complex <br />35C/DIE - Aaberg clay D 0.19 1.9 <br />0 <br />7 <br />103 - Ustarthents-Cryoborolls complex D 0'20 . <br /> <br />B 0.32 3.4 <br />Topsoiled 9.9 <br />Total <br /> Weighted k Factor 0.29 <br />TR-37 <br />13-12.1-198 <br />Revised 08108 <br />