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• recharge in the last two years when compared to the previous three years. Wells GB-1 <br /> and GB-2 had increases in water level, probably due predominately to mine activities. <br /> Mining is moving farther away from these wells with time. <br /> Water-level changes are discussed in more detail in the following section. <br /> 2.1.2 WATER-LEVEL CHANGES <br /> Water-level changes for 1999, as well as all historical data, are presented in <br /> Figures A-1 through A-16 in Appendix A. The wells are grouped according to aquifer <br /> where possible but, in most cases, are grouped by similar water-level elevations. Table A- <br /> I presents a tabulation of the water-level elevations for each of the monitoring wells. <br /> Figure 2-1 presents the total annual precipitation at the Trapper Mine from 1978 through <br /> 1999. Precipitation declined from a high in 1983 to a low in 1988 and had increased again <br /> to a peak in 1993 with a below average value in 1994. The years 1995 through 1997 had <br /> above average precipitation relative to the Trapper Mine record. Water levels in many of <br /> the wells reflect the natural variations in recharge. These changes may lag the actual <br /> precipitation events due to the time it takes the head change to move through the aquifer <br /> to the monitoring well. <br /> Wells GP-1, GP-5 and GP-6 are useful in defining natural variations in the QR <br /> aquifer for 1999. Water levels in each of these three wells show a rising trend from 1995 <br /> through 1998 but have declined or became steady in 1999. Wells GP-2 and GP-8 are used <br /> as a baseline for precipitation/recharge impacts on the KLM aquifer in 1999 and showed <br /> steady water levels in well GP-8 and a decline in water levels in well GP-2 during 1998 and <br /> S 1999. <br /> 2-3 <br />