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fluctuations in water level for well P-5 from January, 1982 to November, 1986. <br />Water-level elevations generally have fluctuated from 643) to 6441 ft-msl. A <br />gradual decrease in water levels each year after spring runoff is typical. Map M54C <br />also presents the water-level elevation 'contours for the Second White Sandstone <br />aquifer for the third quarter of 1986. The gradient near well P-5 in the Second <br />White Sandstone is thought to be approximately 0.08 ft/ft. <br />Lewis Shale <br />Only well P-3 is used to monitor water-level fluctuations in the Lewis Shale. <br />Figure 2.7-29n presents the water-level elevation versus time data for well P-3. <br />Data from 1982 to early 1984 is fairly erratic probably. from large seasonal <br />fluctuations. Water-level data after February 1984 has remained virtually <br />• unchanged.- The water-level elevation in the Lewis.Shale near well P-3 has been <br />approximately 6362 ft-msl for the-last year." <br />Alluvial Aquifer <br />.Wells .GC-3, .and COY are complet.ed.. in .the .Flume. alluvium, while well P-1 is <br />completed in the Pyeatt alluvial aquifer in.[he pre-mining area. Figures 2.7-290, <br />2.7-29p and 2.7-29q present water-level elevation versus time for wells P-1, GC-3 <br />and COY, respectively. Each of the wells exhibits some definite changes in water <br />level.~h+s ;G not uncommon in alluvial aquifers as they are readily influenced by <br />surface runoff and precipitation. <br />We11.P-1 exhibits. consistent water levels from late 1984 to November 1966. <br />• -. _ <br />2-523w ~EV~SED FEB 13 '87 <br />