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The rise in HI aquifer well, GBS, in 1984 through 1987 is <br /> thought to be caused by higher recharge rates and recovery from <br /> mine dewatering. The stabilization of water levels in 1988 is <br />thought to be caused by a decline in recharge and an offsetting <br />recovery from mining. The rise in water level in the last three <br />years in HI aquifer well, GF4, is thought to be caused by <br />recovery from mining upgradient. Water levels in this portion of <br />the aquifer could now be above pre-mine conditions due to the <br />input of additional water just downgradient of the mining. <br />Each of the water levels in the three GE wells have been <br />recovering for several years from mine dewatering from the <br />adjacent operation. The rate of rise has declined the last year <br />which is thought to be due to the greater time since dewatering <br />• stopped. It may also 6e partly attributed to lower recharge <br />rates and/or the mine dewatering that started in the C pit in <br />1988. <br />2.1.2 WATER-LEVEL CHANGES <br />The water-level changes for the period of record are <br />presented on figures in Appendix A. Depth to water and water- <br />level elevation are tabulated in this appendix, also. Many wells <br />reflect changes in annual precipitation amounts. Figure 2-1 <br />(page 2-16) presents precipitation at Trapper Mine. Table A-1 on <br />page A-39 in Appendix A presents the water-level data for wells <br />GA1, GA2, GB1 and GB2. Water-level changes far well GA1, which <br />is completed in the DR aquifer, are shown on the hydrograph on <br />• Figure A-1 of Appendix A. The D coal seam is presently being <br />mined less than 1500 feet from this well to the east and the 0 <br />2-3 <br />