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<br />- Janet Binns <br />Page 3 <br />May 14, 1998 <br /> <br />that this well responded in a relatively short period of time to up gradient mining activities, and <br />is appropriate to identify potential changes in water quality and quantity due to mining at Mine <br />No.3. Average water level and quality for key parameters aze represented below. <br />We11008-77-58 <br />Constituent Yeaz - 1979 (mean) Yeaz - 1997 (mean) <br />Water elevation (M.S.L.) 6715 6713 <br />Calcium (mg/I) 56 173 <br />Sodium (mg/1) 189 160 <br />Magnesium (mg/l) 32 87 <br />Potassium (mg/1) 5 N/A <br />Sulfate (mg/I) 439 550 <br />Bicazbonate (mg/l) 225 525 <br />Total Dissolved Solids (mg/1) 913 1185 <br />Baseline water can be characterized as sodium-bicazbonate. Coal mining commonly changes the <br />water quality to acalcium-magnesium-sulfate. Review of the data indicates that downgradient <br />water quality has been slightly impacted by mining, likely a result of the migration downgradient <br />of water now resident in the reclaimed pit. This resident water, or spoil water, accumulates in the <br />reclaimed pit azea much like water in a bath tub. It subsequently migrates downdip, through the <br />undisturbed rock layers. Spoil water quality at Mine No. 3 is represented by wells 008-SP-4B <br />and 008-SP-SA. <br />Spoil Water Quality <br />Constituent 008-SP-SA 008-SP-4B <br />Water elevation (M.S.L.) 6666 6672 <br />