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the aquifer properties arc- presented first. A discussion on water quality, <br />water levels and ground-water movement follows this. <br />Three wells were drilled across the fill in Pyea[t and Flume Gulches to <br />define the hydraulic gradient perpendicular to the alluvium. Map 35A shows <br />the location of the three Pyeatt wells (well P-l, well P-2, and well P-3) <br />and the three Flume wells (well F-1, well F-2 and well F-3). Five additional <br />wells were drilled in the Pyeatt drainage to define the relationship between <br />the Upper Williams Fork and the shallow ground water systems. The following <br />discussion gives the basic well and pump test information on these wells. <br />Table 2.7-25 presents the location, aquifer, well depth, depth of water <br />level, water level elevation, measuring point information and perforated <br />• interval for the eleven wells in Pyeatt and Flume Gulches. Well F-1 is <br />completed in the Flume Gulch fill, while wells P-1 and P-2 are located in <br />fill in Pyeatt Gulch. Wells F-2 and F-3 are completed in the sandstone that <br />is adjacent to Flume Gulch. Well P-3 is completed in a thin sandstone of <br />the Lewis Shale. Wells P-4, P-5, P-6 and P-7 are completed in the sandstone <br />above the G coal seam, while well P-8 is completed in the sandstone below the <br />G coal seam. Table 2.7-26 gives the lithologic logs For the Flume and Pyeatt <br />wells. <br />Seven pump tests have been conducted on the wells to determine the aquifer <br />properties of the area. A single well pump test was conducted by pumping <br />well F-1 for two hours at an average rate of 28 gpm. Table 2.7-27 presents <br />the pumping and recovery data of well F-1, while Figure 2.7-30 gives 'the <br />. recovery plot. The Theis (refer to pp. 100-102 of Ferris, 1962, for a <br />2-540 <br />