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sandstone between these two coals have been termed the HI aquifer and has been mined <br />in the A, B, and C pits, currently only the A pit mines the H and I coal seams. The 3rd I <br />White Sandstone (G coal and sandstone below) and 2nd White Sandstone (F coal and <br />sandstone below) are monitored at seven locations. H pit currently mines the G coal seam. <br />The Lewis Shale is monitored at one location. The Johnson and Pyeatt Gulch alluvial <br />aquifers are monitored at one site in each of these drainages while the Flume Gulch <br />alluvium is monitored at two locations. The 1996 hydrologic monitoring report, Hydro- <br />Engineering (1997), presents the discussion of the monitoring results through 1996. The <br />table on the tan pull-out index provides basic well data for all wells monitored in 1997. The <br />thins quarter sampling of the wells conducted by Hydro-Engineering, L.L.C. at the Trapper <br />Mine was interrupted by bad weather. As a result, the water levels on wells G61, GB2 and <br />G65 and the water samples from wells GB2 and G65 were mistakenly missed in the third <br />quarter monitoring. ' <br />Spoil springs with flows greater than 5 gpm are required to be monitored to further <br />define the ground-water quality. Only the flows from the East Pyeatt spring, F Pit seep, <br />Horse Spring, Johnson Gulch spoil spring, Slide Spring, Wapiti and West Buzzard were <br />greater than 5 gpm during 1997. <br />Table 1-1 (page 1-3) presents the pit and well dewatering data and volume of <br />water used for dust depression for Trapper Mine for 1997. This data shows that, on an <br />average, approximately 44 and 28 gpm were pumped from the Trapper Mine pits and <br />dewatering wells, respectively. The average pit pumping rates were 10.4, 3.5 and 30.4 gpm <br />for the D, A and H pits, respectively. This data is useful in interpreting water-level changes <br />and consumptive use. . <br />1-2 f <br />