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„ 2004 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 Werburden 3 <br />Waflge Coal 3 <br />Wedge Underburden 4 <br />Wolf Creek Coal and Underburden 4 <br />Ground Water quality 4 <br />Alluvium 5 <br />Wedge Werburden 5 <br />Wedge coal 5 <br />Wedge Underburden 6 <br />Wolf Creek Coal and Underburdea 6 <br />Comparison of Ground Water quality to Water Uae Standards 6 <br />Ground water Summary 8 <br />Surface water 9 <br />Sage Creek 10 <br />Site YSSF3 10 <br />NPDESI2 10 <br />NPDESI3 11 <br />NPDESI4 11 <br />Site YSS2 11 <br />Grassy Creek/Annand Draw 11 <br />NPDESIO 11 <br />NPDESII 11 <br />Site YSGFS 12 <br />Site YSGS 12 <br />Springs 12 <br />Spring YSPG6 12 <br />Spring YSPG10 12 <br />Spoil SDriag YSSPGI 12 <br />Comparison of Surface Water quality to Water Use Standards 12 <br />NPDES Effluent Criteria 15 <br />Surface Water Summary 16 <br />References 16 <br />i <br />