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steady water levels are probably a function of near normal precipitation. The water level in • <br />well GP-4 has also recovered to pre-mine levels. <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 of A pit. Water <br />levels have continued to recover from the A pit mining in this area and will likely still <br />recover more. <br />Wells GP-5 and GP-6 are both completed in the QR aquifer. GP-5 is immediately <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 Append'oc A. Figures A-15 and A-16 present water level versus <br />time plots. Both plots are fairly similar, with a gradual increase in well GP-5 in 2000, while <br />levels were fairly steady in well GP-6. An overall rising trend was observed during the <br />period °of. above normal precipitation. These responses are interpreted to be due to an • <br />increase in recharge for a few years followed by a decrease in recharge. The large <br />distance to active QR mining, with the exception of the F pit mining that began in 1997, <br />indicates that these water-level changes are natural changes. The small decline in well GP- <br />6 could be due to the F pit pumping. <br />Figure A-15 presents the change in water-level elevation for alluvial well P-1, <br />located in the Pyeatt drainage north of the PA. This data demonstrates classic seasonal <br />responses, highs in winter/spring and lows in late summer/fall. An overall increasing trend <br />occurred beginning in 1992 and has been followed by overall steady water levels in the last <br />five years. Well P-3 is completed in the Lewis Shale outcrop, which is in contact with the <br />Pyeatt alluvium. It demonstrates the same seasonal variations (Figure A-15) as the P-1 <br />well. • <br />2-8 <br />