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levels measured in 1983 and 1984. The slight recovery from <br />• 1984 through 1988 is apparently the result of a shift in the <br />location of mining to an area further up dip. Water level <br />fluctuations since 1983 are greater in Well 81-01 as compared <br />to Wells TR-7A and 83-01 as would be expected since this well <br />is closer to the location of mine dewatering. The water <br />levels in Well 83-02 show a different pattern. The water level <br />decline of about 150 feet from 1987 to mid 1989 in Well 83-02 <br />is determined to be related to mine dewatering as Mine 5 <br />workings approached the location of the well. The more abrupt <br />200 foot decline in water levels observed near the end of 1989 <br />and beginning of 1990 is thought to be a drawdown response due <br />to subsidence as its location is only a few hundred feet <br />horizontally from an F seam longwall panel which was mined in <br />• a similar time frame. Water levels appear to have stabilized <br />since that time. Wells TR-4 and 83-03 are located at greater <br />distance horizontally from the active operations for mines 5 <br />and 6. Water levels in Well TR-4 appear to be related to the <br />fluctuations observed on all three of the downgradient Middle <br />Sandstone Wells, 81-01, 83-01 and 83-02. The water level <br />decline in TR-4 prior to 1984 and the subsequent recovery up <br />to 1988 closely parallels the trends observed in Wells 81-01 <br />and 83-01. The decline during the first part of 1991 also <br />parallels the trend in these two wells. However, the rapid <br />decline during the last part of 1989 and the first part of <br />1990 appears to follow the trend observed in Well 83-02 <br />• although the magnitude of decline is considerably less. Well <br />3 <br />