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• <br />• <br />/ Yoast Nline <br />l1 Pand 012/012A Systam <br />HYDROLOGIC INPUT PARA9~IETERS <br /> SEDCAD 4 <br /> Channel YPN1-6-2 <br /> Watershed ID -Structure 9 - SWS1 <br />West side subwatershed <br />`1~latershed Area: 5.5 <br />Cure Number: <br />HYDROLOGIC <br />CURVE <br />AREA <br />WATERSHED TYPE VEGETATION COVER SOIL GROUP NUMBER (acres) <br />Reclaimed Fair (30% - 70%) B 71 4.51 <br /> No Vegetation <br />soiled <br />To B 86 1.03 <br />Reclaimed Total , <br />p 5.5 <br /> CURVE NUMBER 74 <br /> SEDCAD 4 <br /> Channel YPM-6-2 <br /> Watershed ID -Structure 9 - SWS2 <br />East side subwatershed <br />+Natershed Area: 20.3 <br />Curve Number: <br />HYDROLOGIC <br />CURVE <br />AREA <br />WATERSHED TYPE VEGETATION COVER SOIL GROUP NUMBER (acres) <br />Reclaimed Topsoiled, No Vegetation B 86 0.92 <br />Reclaimed Fair (30% - 70°'0) 8 71 16.41 <br />Steep Mountain Brush Good (>70%) p 73 1.01 <br /> Good (>70%) B 41 2.00 <br />Sagebrush <br /> Total 20.3 <br /> CURVE NUMBER 69 <br /> SEDCAD 4 <br /> Channel YPM-6-2A <br /> Watershed ID -Structure 9 - SWS3 <br />Watershed Area: 11.6 <br />Curve Number: <br />HYDROLOGIC <br />CURVE <br />AREA <br />WATERSHED TYPE VEGETATION COVER SOIL GROUP NUMBER (acres) <br />Reclaimed Fair (30% - 70%) B 71 6.21 <br />Aspen/Mountain Shrub Good (>70%) B 30 4.52 <br /> Good (>70%) C 41 0.88 <br />Aspen/Mountain Shrub <br /> Total 11'6 <br /> CURVE NUMBER 53 <br />Vegetation cover conditions presented in Tab 10, Vegetation, Attachment 10-1, 1990/?992 Vegetation Baseline Report, <br />Yoast Study Area (ESCO Associates, 1993). Approved Yoast Mine curve numbers are presented in Attachment 13-12, <br />Posfmining Drainage and Sedirnenf Control ,Table 13-12.1. Values were adapted from Urban Hydrology for Small <br />Watersheds, Technical Release No. 55, Soil Conservation Service, 1986. <br />n <br />u <br />TR-37 <br />13-12.1-187 <br />Revised 08/08 <br />