Laserfiche WebLink
The GC wells (GC-1, GC-2, GC-3, see Figure Ate) are located near the northeast <br />corner of the permit area (PA) nearly two miles from mining activity. These wells are <br />completed in the HI, 3rd White and QAL aquifers, respectively. The water-level changes <br />in these wells are good indicators of natural recharge impacts on these aquifers. Water <br />levels in well GC-1 have been fairly stable since the very wet years of 1983 and 1984. The <br />1995 higher precipitation does not seem to have affected recharge in this aquifer very <br />much. Water levels in wells GC-2 and GC-3 both reflect seasonal variations with a slight <br />lag from precipitation events. Increases were observed in all three wells due to the <br />increased 1995 precipitation, while the smaller 1996 precipitation resulted in less water-level <br />rise. The deeper the aquifer, the more dampened the response (+/- one or two feet for the <br />3rd White Sandstone). <br />Figure A-5 presents the static water-level elevations for wells GD-2, GD-3 and <br />GP-9. These wells are completed in the QR, OR backfill and 3rd White Sandstone <br />aquifers. Between 1988 and 1992, water levels at GD-2 have varied over an annual range <br />of five to ten feet, possibly reflecting seasonal influences. A dramatic rise of 32 feet was <br />observed from September of 1992 to October of 1993, followed by a significant decline in <br />1994. Water levels increased significantly after the 1996 spring recharge. <br />GD-3 is approximately 1200 feet upgradient of well GD-2. It is topographically <br />higher and closer to D pit and is completed in backfill. In 1996, water levels continued to <br />gradually increase with time in well GD-3. The increase in well GD-3 is slightly small than <br />the GD-2 rise, but occurred slightly earlier. Water levels remain stable and reflect natural <br />variations at well GP-9 showing that single high precipitation years do not greatly affect this <br />aquifer at well GP-9. The gradual increase in 1995 and 1996 is probably due to two years <br />2-5 <br />