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2017 WATER YEAR <br />ANNUAL HYDROLOGY REPORT <br />PEABODY SAGE CREEK MINE <br />Table of Contents <br />i <br />Page <br />Introduction <br />1 <br />Meteorological Data <br />4 <br />Ground Water <br />5 <br />Water Levels <br />5 <br />Ground Water Level Summary <br />5 <br />Ground Water Quality <br />6 <br />Alluvium <br />6 <br />Wadge Overburden <br />7 <br />Wadge Coal <br />7 <br />Trout Creek Sandstone <br />7 <br />Spoils <br />7 <br />Comparison of Ground Water Quality to Water Use Standards <br />7 <br />Ground Water Points of Compliance <br />9 <br />Ground Water Quality Summary <br />9 <br />Surface Water <br />10 <br />Fish Creek Drainage <br />10 <br />Surface Water Site SW -S2-10 <br />11 <br />Little Grassy Creek Drainage <br />11 <br />Surface Water Site SW -S2-5 <br />11 <br />NPDES Discharge Point 002 <br />11 <br />Grassy Creek Drainage <br />13 <br />Surface Water Site YSGF5 <br />13 <br />Surface Water Site SW -S2-1 <br />13 <br />NPDES Discharge Point 003 <br />13 <br />Surface Water Site SW -S2-2 <br />14 <br />Surface Water Site YSG5 <br />17 <br />i <br />