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2013 ANNUAL HYDROLOGY REPORT <br />YOAST MINE <br />Table of Contents <br />Introduction <br />Meteorological Data <br />Ground Water <br />Water Levels <br />Ground Water Level Summary <br />Ground Water Quality <br />Alluvium <br />Wadge Overburden <br />Wadge Coal <br />Wadge Underburden <br />Wolf Creek Coal and Underburden <br />Comparison of Ground Water Quality to Water Use Standards <br />Ground Water Points of Compliance <br />Ground Water Quality Summary <br />Surface Water <br />Sage Creek <br />Site YSSF3 <br />NPDESI2 <br />NPDES13 <br />NPDES14 <br />Site YSS2 <br />Grassy Creek /Annand Draw <br />NPDES10 <br />NPDES11 <br />Site YSGF5 <br />Site YSG5 <br />Springs <br />Comparison of Surface Water Quality to Water Use Standards <br />NPDES Effluent Criteria <br />Surface Water Summary <br />References <br />i <br />Page <br />1 <br />2 <br />2 <br />2 <br />2 <br />3 <br />3 <br />4 <br />4 <br />4 <br />4 <br />4 <br />5 <br />5 <br />7 <br />8 <br />8 <br />8 <br />8 <br />8 <br />9 <br />9 <br />9 <br />9 <br />9 <br />10 <br />10 <br />11 <br />14 <br />15 <br />17 <br />