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Yoast Mine <br />Postmine Channel Design <br />HYDROLOGIC INPUT PARAMETERS <br />SEDCAD4 <br />Channel YPM-1-1 <br />Watershed ID -Structure 1 - SWS1 <br />hed Area: 54.2 <br />Number: <br />WATERSHED TYPE VEGETATION COVER SOIL GROUP NUMBER (acres <br />Reclaimed Fair (30% - 70%) B 71 51.1 <br /> <br />Aspen/Mountain Shrub <br />Good (>70%) C <br />41 2.4 <br />0 7 <br />Sagebrush Good (>70%) C 47 <br />54.2 <br />Total <br /> CURVE NUMBER 69 <br />Approved Yoast Mine curve numbers are presented in Appendix 13-12, Postmining Drainage and Sediment <br />Control ,Table 13=12.1. Values were adapted from Urban Hydrology for Smal! Watersheds, Technical <br />Release No. 55, Soil Conservation Service, 1986. <br />• <br /> <br />13-12.3-15 Revised 08/07 <br />TR-36 <br />