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<br />1.0 IlVTRODUC°I'ION <br />This report presents the Bound-water and surface-water monitoring results for Trapper <br />Mine for 2004. Significant mine activities during 2004 include continued expansion of the Flintlock <br />(F~, Gatling (G) and Z pits. Mining was completed in 2002 in the Derringer (D) Pit. Dewatering was <br />conducted in the A, F, and G pit areas in 2004. Well dewatering was used in 2004 in the G pit area <br />Ground-water monitoring of the aquifers associated with Trapper Mine started in 1974. <br /> <br />The Bound-water flow regime has been divided into the major sandstones and coal/adjacent sandstone <br />aquifers. This division of the aquifer systems was selected at clay and shale units, which have the <br />potential to retard vertical movement. A pull-out index presents the schematic of the aquifer units at <br />Trapper on one side and the basic well data table on the other. It is suggested moving this index sheet <br />to the section of the report being reviewed. Aquifer properties are presented in Table 2-1 of the 1990 <br />Annual Hydrologic Report. <br />The Twenty Mile Sandstone is the fnst major sandstone below the mined coal seam at <br />Trapper Mine. The U coal seam and adjacent sandstones is a minor aquifer between the mined coal <br />seams and the Twenty Mile Sandstone. The Q and R coal seams and sandstone between these two <br />coal seams have been labeled the QR aquifer. This is one of the major aquifers of interest because C, <br />D, E, F, G and Z pits have mined the Qand/or R coal seams, currently the F, G and Z pits mine the Q <br />seam The K, L, and M coal seams and the sandstones, which aze stratigraphically in this interval, aze <br />called the KLM aquifer. The F pit mines the I, L, M and Q seams while the G pit mines the H, K, L, M <br />and Q seams and the Z pit mines the I, L, M and Q seams. The KLM aquifer is above the QR aquifer, <br />but below the HI aquifer. The H and I coal seams and sandstone between these two coals have been <br />termed the HI aquifer and have been mined in the A, B, F, G and Z pits, currently the G pit mines the H <br />Trapper Mining Company t-l <br />2004 Annual Report <br />