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• 2.0 GROUND-WATER LEVELS <br /> Water levels or water pressure have been measured in 38 wells <br /> at Trapper Mine. Wells GF1 , GF3, GD2, GP1 , GP3, GP4, and well 81- <br /> 03a are flowing wells and pressure readings on these wells have <br /> been converted to static water head in feet above land surface. <br /> Well GD1 is not measured for water level because a pump is <br /> installed in this well . Monitoring wells GD3, GF11 and Glux-1 were <br /> installed in 1988. <br /> The location of the monitoring wells is shown on Map No. 2-1 . <br /> Wells GD1 and GFI are completed in the Twenty Mile Sandstone, while <br /> well GF2 is completed below the R coal in the U aquifer system. <br /> Seven wells, GA1 , GE19 GD2, GF6, GP1 , GP5 and GP6 are used to <br /> monitor the OR aquifer, Wells GA2, GB1 , GF3, GP2, GP4 and GPB are <br /> used to monitor the KLM aquifer. Six wells, GB5, GC1 , GE2, GF4, <br /> GP3 and GP7 are used to observe changes in the HI aquifer. Wells <br /> GB2, GC2, P8, 81-03a and GP9 are used to monitor the Third White <br /> Sandstone aquifer . Wells GE3 and P5 are completed in the Second <br /> White Sandstone between the G and F coals, while Glux-1 is used to <br /> monitor the First White Sandstone. Well P3 is perforated in the <br /> Lewis Shale. Four alluvial wells, GC3, P1 , J1 and COY are used to <br /> monitor the Flume, Pyeatt , Johnson and Flume alluvium. Wells GF5 <br /> and GF7 are completed in the backfill aquifer in an area where the <br /> HI seams were mined . Wells GD3 and GF11 were completed in <br /> backfill aquifers in areas where the OR aquifer was mined . <br /> 2-1 <br />