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water when compared with GD-2 and GF-6. Therefore, a backfill well in this area is not aleemed • <br />necessary. <br />2.1 GROUND WATER-LEVEL CHANGES <br />2.1.1 SUMMARY <br />Significant mine activities during 1995 included the continued expansion of the A, D and <br />H pit areas. Pit D dewatering was neazly double the 1994 value and some dewatering occurred in <br />both A and H pits. No dewatering occurred in these pits in 1994. <br />Annual precipitation for 1995 was 19.75 inches, up significantly from 11.29 inches in <br />1994 and above average precipitation. This is the third highest total occurring during the time <br />period from 1978 to 1995 (Figure 2-1). Recharge in this geographic setting is directly related to <br />precipitation. <br />The effects of natural recharge variations on the respective aquifers can be observed i^ <br />wells located in undisturbed areas away from the influence of mining activities. Well GC-3 <br />exhibited the alluvia] water level response with a spring and summer increase due to recharge and <br />a fall decline. The net August, 1994 through August, 1995 change was +7.7 ft. Thi.~ositive, <br />change (or increase in water-level elevation) is due to the significant increase in precipitation that <br />occurred during 1995. The effects on the 3rd White a uifer are observed in wells GC-2 and GP-9. <br />-~~ <br />Both wells show a general decline since 1987 with seasonal v! ari` s; The August, 1994 through <br />August, ]995 changes are +1.0 ft. (GC-2) and -1.0 ft. (GP-9). The HI aquifer~GC-1 GP'~is <br />charac~ by a flat water level trend with variations over a one to two foot range. The August, <br />1994 through August, 1995 changes aze +2.0 ft. and -1.8 ft., respectively. The 1CI.M aquifer (GP-2r • <br />2-2 <br /> <br />