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U <br />dewatering. Present levels may be r_lose to pre--mine levels. <br />Figure A-18 shows that water levels in backfill well GF5 rose <br />steadily from its installation to mid-1988, Water levels have been <br />gradually declining since then, probably due to the dry cycle. <br />Pre-mine water levels may have been higher in the HI aquifer at <br />site GF5. The averaee water levels in well GF6 for 1988 and 1989 <br />were fairly stable after declining steadily from levels for 1986 <br />and 1937 (see Figure A-19l. Water levels rese in the Sprln2 of <br />199 and then reti.~rneci to a r?r.adual declining' trend seen prior to <br />the water Level rise. Water Levels in the 9R sgeiifer are thought <br />to be refler_ting historical precipi+.ation influences. Upgradient <br />mining in 1983 could have r_aused some water-level flur_tuations, but <br />• overall trends are thought to have been oaused by natural <br />influences. <br />Figure A-20 presents water-level data r_ollected for well GF7. <br />This hydrograph indicates that water levels were steadily rising <br />during 1987 and 1988 and may have begun to stabi_li~e durine 1989 in <br />the backfill near well GF7, The water levels for the past two <br />years have been steady. Figure A-21 presents the water-level <br />elevation for well GF11. which is Upgradient of well GF6. This <br />data indicates that the water- levels in the backfill of this .area <br />fluctuate seasonally due to recharge. Very little seasonal rise <br />was observer' in 199?. <br />Figure A-'.2 presents the water-lavFl elevation data £~~r well <br />• GP? We11 GP1 was a flowing we 11 but the water levels declined to <br />below the top of the r_asine. This laree decline for well GP1 in <br />2-9 <br />