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• 1.0 INTRODUCTION <br />This report presents the ground-water and surface-water <br />monitoring results for Trapper Mine for 1988. Ground-water <br />monitoring of the aquifers at Trapper Mine started in 1974. The <br />ground-water flow regime has been broken up into the major <br />sandstones and coal and adjacent sandstone aquifers. The <br />division of the aquifer systems was selected at clay and shale <br />units which have the potential to retard vertical movement. <br />Figure 1-1 presents a schematic of the aquifer units at Trapper <br />Mine. The Twenty Mile Sandstone is the lower most aquifer <br />monitored at Trapper Mine. The U coal seam and adjacent <br />sandstones are the .second aquifer monitored. The D and R coal <br /> seams and sandstone between these two coal seams has been <br /> labelled the OR aquifer. This is one of the major aquifers of <br /> interest because both D and E pits mine the 0 and R seams. The <br /> K, L and M coal seams and the sandstones which are <br /> stratigraphically in this interval are called the KLM aquifer. <br /> The KLM aquifer is above the OR aquifer, but below the HI <br /> aquifer. The H and I coal seams and sandstone between these two <br /> coals has been termed the HI aquifer. The Third White (G coal <br /> and sandstone below) and Second White (F coal and sandstone <br /> below) Sandstones each are monitored at this site. The Lewis <br /> Shale is also monitored at one location. The Johnson, Pyeatt and <br /> Flume alluvial aquifers are also monitored at this site. The <br />1987 hydrologic monitoring report, Hydro-Engineering (1988), <br />presents a discussion of the monitoring results through 1987. A <br />. new monitoring well, Glux-1, was installed during September, 1988 <br />to monitor ground-water conditions in the First White Sandstone <br />1-1 <br />