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• permeability aquifers herve exhibited limited drawdowns in the immediate vicinity of the active pits. <br />Further, drawdowns downgradient of the active mining areas typically recover much faster than <br />expected because the increased permeability in the backfill spoil aquifer transmits water to the <br />J <br />I• <br />downgradient end of the pit more readily. <br />Drawdowns at KLM well GP-2, roughly 2200 feet distant from the G pit boxcut, have developed on the <br />order of thirty feet, within the approximate range of predicted behavior for aquifers in the area, while <br />drawdown recorded at (1R well GP-1, some 1200 feet away from the boxcut, has been observed at <br />approximately 40 feet. <br />Wells GC-1 and GC-2, completed in the HI and 3rd White Sandstone aquifers respectively, have <br />shown only slight declines in water level through 2001 despite being located only about 1000 feet <br />away from mined areas in A pit. These drawdowns are thus far less than predicted. <br />IMPACTS TO ADJUDICATED WELLS (see Map M31) <br />The Second White sandstone does not exist in Derringer pit. In Ashmore pit, the Second White <br />Sandstone is probably not saturated in the areas of the pit that will be mined from 1998 to 2000. <br />The nearest Third White: sandstone well to the Ashmore pit during the permit period is slightly greater <br />than one mile to the northeast. Significant drawdowns in the Third White sandstone to the north of the <br />mine are not expected because drainage of ground water to the north end of the mine due to <br />increased permeability in the backfill aquifer will likely cause water-level rises in the Third White <br />sandstone aquifer north of the mine. No impacts are expected in Third White sandstone wells 80998 <br />and W-624-74 during the 1998-2002 permit term. The QR and KLM wells in the eastern portion of the <br />permit should not be impacted due to their large distance from active mining in these seams for the <br />next five years. Wells 226553F, 226554E and 22100E are completed below fhe Twentymile <br />Sandstone and should not be impacted by the mine dewatering. <br />4-226d <br />~RViston~ AR- s <br />n ~. ,. ~(3 <br />