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• earlier 1980s. The slight recovery from 1984 through 1988 is apparently the result of a <br />shift in the location of mining to an area further up dip. Water level fluctuations since 1983 <br />are greater in Well 81-01 as compared to Wells TR-7A and 83-01 as would be expected <br />since this well is closer to the location of mine dewatering. The water levels in Well 83-02 <br />show a different pattern. The water level decline of about 150 feet from 1987 to mid 1989 <br />in Well 83-02 is determined to be related to mine dewatering as Mine 5 workings <br />approached the location of the well. The more abrupt 200 foot decline in water levels <br />observed near the end of 1989 and beginning of 1990 is thought to be a drawdown <br />response due to subsidence as its location is only a few hundred feet horizontally from an <br />F seam longwall panel which was mined in a similar time frame. Water levels appear to <br />have stabilized since that time. Wells TR-4 and 83-03 are located at greater distance <br />horizontally from the active operations for mines 5 and 6. Water levels in Well TR-4 appear <br />• to be related to the fluctuations observed on all three of the downgradient Middle <br />Sandstone Wells, 81-01, 83-01 and 83-02. The water level decline in TR-4 prior to 1984 <br />and the subsequent recovery up to 1988 closely parallels the trends observed in Wells 81- <br />01 and 83-01. The decline during the first part of 1991 also parallels the trend in these two <br />wells. However, the rapid decline during the last part of 1989 and the first part of 1990 <br />appears to follow the trend observed in Well 83-02 although the magnitude of decline is <br />considerably less. Well 83-03 is the Middle Sandstone monitoring well located furthest <br />(more than 1.5 miles) from active underground operations for Mines 5 and 6. The overall <br />trend from 1984 through 1994 suggests a similar trend to the other Middle Sandstone <br />wells. The long term decline could be a pressure response due to the overall drop in <br />• <br />3 <br />