Laserfiche WebLink
LJ <br />1.0 INTRODUCTION <br />This report presents the ground-water and surface-water <br />~- monitoring results for Trapper Mine for 1990. 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 Q and R coal seams and sandstone <br />• between these two coal seams have been labelled the QR aquifer. <br /> This is one of the major aquifers of interest because D, E, and C <br /> pits mine the Q 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 QR aquifer, but <br /> below the HI aquifer. The H and I coal seams and sandstone between <br /> these two coals have been termed the HI aquifer. The Third White <br /> (G coal and sandstone below) and Second White (F coal and sandstone <br /> below) Sandstones each are monitored at seven locations. The Lewis <br /> Shale is also monitored at one location. The Johnson and Pyeatt <br />- alluvial aquifers are also monitored at one site in each of these <br /> drainages while the Flume alluvium is observed at two locations. <br />• The 1989 hydrologic monitoring report, Hydro-Engineering (1990), <br /> presents a discussion of the monitoring results through 1989. One <br />1-1 <br />