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r� <br />f• J <br />Peabody Sage Creek Mine <br />PM -1 System Channel Designs <br />HYDROLOGIC INPUT PARAMETERS <br />SEDCAD 4 <br />WATERSHED ID <br />Structure 13 - SWS1 <br />Channel PM- 61-ower <br />Postmine Desion <br />watershed Area: <br />84.7 <br />;urve Number: <br />WATERSHED TYPE <br />Reclaim >3 years <br />Total) <br />HYDROLOGIC CURVE AREA <br />GROUND COVER SOIL GROUP NUMBER (acres) <br />Good ( >70 %) B 62 84.7 <br />84.7 <br />CURVE NUMBER 62 <br />• <br />• <br />Peabody Sage Creels Mine curve number (CN) values are based on CN values previously approved by CDRMS for the <br />Seneca If Mine, Permit C -80 -003. The CN values are presented in the Seneca II Mine PAP in Appendix 7 -12, Postiming <br />Drainage Control. Values are adapted from Urban Hydrology fcr Small Watersheds, Technical Release No. 55 (TR -55), <br />Soil Conservation Service, 1986. <br />2.05.3 -E2. H.36 <br />Revised 12/09 <br />