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water level rise. This decline is probably due to the drier • <br />i <br />conditions during the last £ew years that has caused similar <br />I <br />natural declines in several other White Sandstone wells. Well GMP- <br />1 was completed in the HI spuifer in order to monitor around-water <br />i <br />conditions dewnaradient of the ash disposal site 1or_ated .iustl to <br />the south in A pit. The water level £or 1991 remained very sts~ble <br />while water levels rose in 199? (Fie'izre A-39) <br />2.2 GRO[7ND WATER-LEVEL ELEVATION (PIEZOMETRIC MAP SOMMARYI <br />Hydro-Engineering dev?loped three pie~ometric maps to show `the <br />water level flow patterns fo-r the (~R. $I and Third White Sandstone <br />aquifers at Trapper Mine. Wster levels from the Fs11 of 199? wire <br />i <br />used to develop these rasps. which follow thi.=_ section. • <br />Map ido. 2-1 presents tY~e water-level elevations fur the 9R <br />aquifer. The water-level elevation is preser_ted f~~r the ~& wells: <br />GA1, GD2, GE1, GF6. GP1, GP5 and GP6 and backfill wells GD3 Ind <br />GF11. The ground-water flow in the (~R aquifer is mainly to the <br />north. Mining has only affected the ~?R aquifer close to the C,I D <br />and E pits by causing drawdowns very near the pit edees. The <br />installation of bar_kfi11 wells GDS and GFil have defined the <br />depressed elevations in the backfill cress. 'The bar_1cfi11 w.atler <br />levels will lib:ely stabilise lower than the pre-mine levels due~to <br />the increased permeabilil:y o£ the backfill .•=_qui£er which allows the <br />W 3ter in the agl.llf F'r t~~ be transmitted ai .a 1^wer ?radi=nt. T'ie <br />heads in the northern end of the backfill aquifer will likely <br />recover .shove the pre-mina level. Table 2-1 of the 199L~ Annull <br />~_?? <br />