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• A-39 in Appendix A presents the water-level data for wells GA1 , <br /> GA2, GB1 and GB2. Water-level changes for well GA1 , which is <br /> completed in the OR aquifer, are shown on the hydrograph on Figure <br /> A-1 of Appendix A. The 0 coal seam was mined less than 1500 feet <br /> from this well to the east during 1988 and was not mined during <br /> 1989. The 0 and R coal seam was mined less than 2500 feet to the <br /> west during 1989. Water levels were rapidly rising in 1984 and <br /> had declined to an average rate of three feet per year during <br /> 1986. These rises are thought to be due to increased recharge from <br /> the increased precipitation in 1983 and 1984 (see Figure 2-1 ) . <br /> Water levels declined at a higher rate from 1987 through 1989 with <br /> the water levels dropping approximately 32 feet in the last three <br /> • years. At least some of . this decline is thought to be due to a <br /> decline in the recharge from the decline in precipitation . Some <br /> of the decline is also likely to be caused by the adjacent mine <br /> dewatering in the D and E pits. <br /> Water levels for well GA2 (see Figure A-2) , which is <br /> completed in the KLM aquifer, had responded similarly in the last <br /> few years prior to 1989, with a water-level rise each Spring <br /> followed by a decline for the remainder of the year. The <br /> water-level changes in well GA2 for the past year showed a very <br /> small Spring rise. The water levels showed a net decline of <br /> approximately four feet for the year. Water levels in the KLM <br /> aquifer in this area rose in the past due to higher rates of <br /> recharge, while the decline the last three years is thought to be <br /> • caused by only the decline in recharge. <br /> 2-4 <br />