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i <br />level is observed for 1991. Water-level rises have been much less • <br />in the Third and Second White Sandstones and greater in the QR <br />i <br />aquifer in this area. Mining has occurred within 2000 feet of <br />I <br />these wells in an adjacent underground permit, while the closest <br />mining in Trapper"s B and C pits is approximately 2400 feet away. <br />The majority of the historical drawdowns obser~~ed at these wells <br />was probably not due to Trapper Mine dewatering. The reduction in <br />the rate of recovery of water level should gradually occur as the <br />length of time since dewatering increases. This is likely the <br />cause of the slower rates of water-level recovery in the Gfi wells, <br />but the decline in precipitation and/or the dewatering that started <br />in C pit (1988) and E3 pit (December, 1989) cou13 be a cause. <br />Water levels in the GF wells are tabulated in Tables A-4, A- • <br />5 and A-6 (pages A-47 through A-51) of Appendix A. Wells GF1 and <br />GF3 are flowing wells, while the casing on well (.F2 was extended in <br />1985 and it no longer flows. Figure A-14 shoos the water-level <br />elevations in the Twentymile Sandstone at GF1. Water levels show <br />little change since August 1987. Water levels iti well GF1 declined <br />in early 1989 by approximately eight feet and ha«e shown a recovery <br />since then to a current level above those observed in 1987. Water <br />levels were gradually increasing in well GF2 (.:figure A-15) until <br />mid-1987, then the levels declined in 1989. T;.ie water levels in <br />the second half of 1990 through 1991 are siruilar to the 1989 <br />levels. This decline is probably due to lower precipitation the <br />last few years. <br />CJ <br />2-8 <br />