Laserfiche WebLink
• August, 1996 changes are -2.4 ft. and -0.2 ft., respectively. The KLM aquifer (GP-2, GP-8) <br />has shown fairly stable water levels in recent years with variations of less than one foot <br />from August, 1995 through August, 1996. The QR aquifer response (GP-1) has been an <br />overall decline from 1990 to 1995 with variations over an eleven foot range. The water- <br />level elevations have gradually risen in 1995 and 1996. <br />There were several water level increases observed in 1996 that exceed those <br />expected from natural variations and are responses to mine activities. Wells GE-1, GE-2 <br />and 81-03a had water level increases which were probably due to a decrease in dewatering <br />at the adjacent underground mine. Well GMP-1's water level increases are most likely due <br />to the movement of Pit A to the east of this area. The water level rises in well GD-3 are <br />possibly due to the moving of Pit D farther from well GD-3. Wells GB-1, GB-2 and GF-5 <br />• also had increases in water-level, probably due predominately to mine activities. Mining is <br />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 1996, as well as all historical data, are presented in <br />Figures A-1 through A-17 in Appendix A. The wells are grouped according to aquifer where <br />possible but, in most cases, are grouped by similar water-level elevations. Table A-1 <br />presents a tabulation of the water-level elevations for each of the monitoring wells. Figure <br />2-1 presents the total annual precipitation at the Trapper Mine from 1978 through 1996. <br />Precipitation declined from a high in 1983 to a low in 1988 and had increased again to a <br />• peak in 1993 with a below average value in 1994. The years 1995 and 1996 had above <br />2-3 <br />