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YOAST MINE <br />Dragline Deadhead Route Postmine Channel <br />HYDROLOGIC INPUT PARAMETERS <br />• <br />• <br /> SEDCAD 4 <br /> WATERSHED ID <br /> Structure 1 - SWS1 <br /> Deadhead Channel Watershed <br />Watershed Area: <br />1154 <br />Curve Number: <br /> HYDROLOGIC CURVE AREA <br />VEGETATION TYPE COVER CONDITION SOIL GROUP NUMBER (acres) <br />Aspen/Mountain Brush Good (>70%) C 41 45 <br />Aspen/Mountain Brush Good (>70%) D 48 19 <br />Mesic Drainage Fair (30% - 70%) C 81 95 <br />Herbaceous Good (>70%) C 74 58 <br />Herbaceous Good (>70%) D 85 106 <br />Reclaimed Fair (30% - 70%) B 71 6.5 <br />Sagebrush Fair (30% - 70%) D 70 824.5 <br />Total 1154 <br /> CURVE NUMBER 71 <br />Vegetation type and vegetation cover condition information adapted from Natural Resources Conservation <br />Service (NRCS) soil series database for Routt County, Colorado (unpublished). <br />Hydrologic Soil Group (HSG) values based on NRCS soil series map unit database for Routt County, <br />Colorado (unpublished). <br />Curve number (CN) values used are approved Yoast Mine values (see Table 13-12.1). Values were <br />adapted from Urban Hydrology for Small Watersheds, Technical Release No. 55 (TR-55) ,Soil Conservation <br />Service, 1986. <br />TR-36 13-106-7 Revised 08/07 <br />