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1 .0 INTRODUCTION <br /> This report presents the ground-water and surface-water <br /> monitoring results for Trapper Mine for 1989 . 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 division <br /> of the aquifer systems was selected at clay and shale units which <br /> have the potential to retard vertical movement. Figure 1-1 <br /> presents a schematic of the aquifer units at Trapper Mine. The <br /> Twenty Mile Sandstone is the lower most aquifer monitored at <br /> Trapper Mine. The U coal seam and adjacent sandstones are the <br /> second aquifer monitored . The O and R coal seams and sandstone <br /> • between these two coal seams have been labelled the OR aquifer. <br /> This is one of the major aquifers of interest because D, E, and C <br /> pits mine the O and R seams. The K, L and M coal seams and the <br /> sandstones which are stratigraphically in this interval are called <br /> the KLM aquifer. The KLM aquifer is above the OR aquifer, but <br /> below the HI aquifer . The H and I coal seams and sandstone <br /> between these two coals have been termed the HI aquifer . The Third <br /> White (G coal and sandstone below) and Second White (F coal and <br /> sandstone below) Sandstones each are monitored at seven locations. <br /> The Lewis Shale is also monitored at one location . The Johnson , <br /> Pyeatt and Flume alluvial aquifers are also monitored at four <br /> sites . The 1987 and 1988 hydrologic monitoring reports, Hydro- <br /> Engineering ( 1988 and 1989) , presents a discussion of the <br /> • monitoring results through 1988. No new monitoring wells were <br /> 1 -1 <br />