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I 11 <br />J <br />r <br />~J <br />2002 ANNUAL HYDROLOGY REPORT <br />YOAST MINE <br />Table Of Contents <br /> Page <br />Introduction 1 <br />Meteorological Data 2 <br />Ground Water 3 <br />Water Levels 3 <br />Alluvium 3 <br />Wedge Overburden 3 <br />Wedge Coal 4 <br />Wedge Uaderburdea 4 <br />Wolf Creek Coal and Underburden 4 <br />GrouaB Water Quality 4 <br />Alluvium 5 <br />Wedge Overburden 5 <br />Wedge Coal 6 <br />Wedge Vnderburden - 6 <br />Wolf Creek Coal and Underburden 6 <br />Comparison of Ground Water Quality to Water Dae Standards 6 <br />Ground Water Summary 7 <br />Surface Water 9 <br />Sage Creek 10 <br />Site YSSF3 10 <br />NPDESI4 10 <br />NPDESI2 10 <br />Site YSS2 10 <br />Grassy Creek/Anaand Draw 11 <br />NPDESID 11 <br />NPDESII 11 <br />Site YSGFS 11 <br />Site YSGS 11 <br />Springs 12 <br />Spring YSPG6 12 <br />Spring YSPG10 12 <br />Comparison of Surface Water Quality to Water Use Standards 12 <br />Surface Water Summary 15 <br />References 16 <br />i <br />