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n <br />~~ <br />Figure A-18 shows that water level in backfill well GF5 had <br />steadily risen since its installation to mid-1988. Water levels <br />have been gradually declining since mid-1988 probably due'to the <br />dry cycle. Pre-mine water levels may have been greater in the HI <br />aquifer at site GFS. The average water levels in well GF6 for 1988 <br />and 1989 have been fairly stable after declining steadily from <br />levels for 1986 and 1987 (see Figure A-19). A rise in water levels <br />was observed in the Spring of 1990. Water levels in the QR aquifer <br />are thought to be reflecting historical precipitation influences. <br />Upgradient mining in 1983 could have caused some water-level <br />fluctuations. Overall trends are thought to have been caused by <br />natural influences. <br />• Well GF7 was completed in the Fall of 1987 in backfill <br />material where the HI coal seam was mined. Figure A-20 presents <br />water-level data collected for well GF7. This hydrograph <br />indicates that water levels were slowly rising during 1987 and 1988 <br />and may have begun to stabilize during 1989 in the backfill <br />material near well GF7. The average 1990 level is slightly larger <br />than the 1989 values, Figure A-21 presents the water-level <br />elevation plot for well GF11 which was installed in July 1988 in <br />backfill material where the QR coal was mined and upgradient of <br />well GF6. This data indicates that the water levels in the <br />backfill in this area fluctuate seasonally due to recharge. <br />_. Figure A-22 presents the water.-level elevation data for QR <br />aquifer well GP1. Well GP1 was a flowing well but the water level <br />has declined to below the top of the casing. The large decline in <br />2-10 <br />