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~~ <br />YOAST POSTMINE CHANNEL 9 <br />HYDROLOGIC INPUT PARAMETERS <br /> SEDCAD 4 <br /> WATERSHED ID <br /> Structure 1 - SWS1 <br /> Channel YPM-9 Watershed <br />Watershed Area: 17.2 <br />Curve Number: <br /> HYDROLOGIC SOIL CURVE <br />WATERSHED TYPE VEGETATION COVER GROUP NUMBER AREA (acres) <br />Reclaimed Fair (30% - 70%) B 71 17.2 <br />Total 17.2 <br /> CURVE NUMBER 71 <br />Approved Yost Mine curve numbers are presented in Attachment 13-12, Postmining Drainage and Sediment <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 />• <br />TR-37 13-12.3-112 Revised 08/08 <br />