Laserfiche WebLink
Wells GP-3 and GP-4 are less than 1000 feet downgradient from A pit. Both are • <br />flowing wells completed in the HI and KLM aquifers, respectively. Figures A-13 and A-14 <br />show similar responses in water levels due to changes in precipitation. Water levels in well <br />GP-3 have recovered to above pre-mine levels in this area and show that any depletion of <br />water from upgradient mining has been replaced by recharge to the HI aquifer. The <br />gradual declines in water levels in well GP-3 over the last four years are probably a <br />function of below normal precipitation. The water level in well GP-4 has also recovered to <br />pre-mine levels but observed a small water level rise in 2002. <br />Well GMP-1 (Figure A-13) was completed in the HI aquifer to monitor ground- <br />water conditions downgradient of the ash disposal site immediately south in A pit. Water <br />levels became steady in 2001 and stayed steady in 2002, possibly a lull in the recovery <br />from the A pit mining due to less recharge. <br />Wells GP-5 and GP-6 are both completed in the QR aquifer. GP-5 is immediatey <br />downgradient of A pit and GP-6 is immediately upgradient of the pit. Water-level data is <br />tabulated in Table A-1 in Appendix A. Figures A-15 and A-16 present water level versus <br />lime plots. Both plots are fairly similar, with an increase in water level in wells GP-5 and <br />GP-6 in the last two years. An overall rising trend was observed during the period of <br />above normal precipitation while an overall smaller rise has been observed during the <br />below normal precipitation. These responses are interpreted to be due to an increase in <br />recharge for a few years followed by a decrease in recharge. The rise in the last few years <br />in water levels indicate good recharge from the below average precipitation. These <br />responses indicate that the mining from the QR seams which is nearest in the F pit mining <br />that began in 1997, has not significantly affected water levels in GP-5 and GP-6. <br />C~ <br />2-8 <br />