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0 4.8.2.2b Operational Groundwater Levels. 1981-1986 <br />Operational water levels for Trapper Mine are presented in this section by aquifer completion. Hydro- <br />graphs for the respective wells are also included. Part B of Appendix V presents the water-level eleva- <br />tion tabulation for the wells completed in the operational mine area, while the water-level elevation con- <br />tours for the individual aquifers, QR, KLM, HI, 2nd and 3rd White Sandstone and Alluvial, are shown on <br />Maps M54 through M54C. Water-level elevations from September 1986 were used in developing these <br />maps. Wells GFt, GF3, and GD2 are flowing welts and pressure readings of these wells have been <br />converted to static water head above the land surface. Additional water level elevation information for <br />1987-1996 can be found in Section 2 of Trapper's yearly annual report to the Division. <br />Twenty Mile Aquifer <br />Wells GD1, GF1, and GZ1, are completed in the Twenty Mile Sandstone. Of the three wells, only GF1 <br />is available to measure water levels. Well GZ1 is a dry well. Well GD1 was not measured for water <br />level since a pump was installed in this well as a domestic water supply. Figure 4.8-9 shows that the <br />water-level elevations in the Twenty Mile Sandstone at well GF1 have remained stable except for a rise <br />in the last portion of 1986. <br />U Aquifer <br />• Wells GF2 and GZ2 are completed below the R coal in the U aquifer system. The casing on well GF2 <br />was recently extended so it is no longer a flowing well. Figure 4.8-10 presents the gradually rising <br />water-level data through 1986 for well GF2, with the exception of September, 1986. Figure 4.8-11 <br />exhibits gradually declining water levels in well GZ2 until 1986 when the well was approved for <br />abandonment due to mining. <br />By the end of 1986, all GZ monitoring wells were destroyed by mining pit activity (E pit). <br />• 4-2268 <br />Pz-y <br />MAY -131.99.8