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Yoast Mine <br /> Postmine Channel Design <br /> HYDROLOGIC INPUT PARAMETERS <br /> SEDCAD 4 <br /> Channel YPM-6-1 <br /> Watershed cture 7 - SWS1 <br />~~~~~~ <br /> Watershed Area: 8.2 <br /> West side subwatershed <br /> Curve Number: <br /> HYDROLOGIC CURVE AREF <br /> WATERSHED TYPE VEGETATION COVER SOIL GROUP NUMBER ( <br /> <br />Reclaimed <br />Fair (30% - 70%) <br />B <br />71 1 54 <br /> <br />>70% C <br />41 6.69 <br /> Aspen/Mountain Shrub ) <br />Good ( g.23 <br /> Total <br /> CURVE NUMBER 47 <br /> SEDCAD 4 <br /> Channel YPM-6-1 <br /> W ed ID -Structure 7_~S~NS2 <br /> Watershed Area: 27.8 <br /> East side subwatershed <br /> Curve Number: <br />i <br />~~~ <br />WATERSHED TYPE VEGETATION COVER SOIL GROUP NUMBER (acres) <br />Reclaimed Fair (30% - 70%) <br />71 20.50 <br />B <br /> <br />Aspen/Mountain Shrub Good (>70%) C 4.00 <br />41 3 <br />34 <br />Sagebrush Good (>70%) . <br />C 47 <br />27.84 <br />Total <br /> CURVE NUMBER 64 <br />d Yoast Mine curve numbers are presented in App endix 13-12, Postmining Drainage and Sediment <br />Approve <br />Control ,Table 13-12.1. Values were adapted from Urban Hydrology for Small Watersheds, Technical <br />Release No. 55 ,Soil Conservation Service, 1986. <br />• <br />13-12.3-21 Revised 08/07 <br />TR-36 <br />