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2.0 GROUND-WATER LEVELS <br />Water levels or water pressure have been measured in 39 wells at Trapper Mine. Wells <br />GD-2, GF-I, GF-3, GP-3, GP-4, and well 81-03a are flowing wells and pressure readings on these <br />wells have been converted to static water head in feet above land surface. Well GD-I(2) is not <br />measured for water level because a pump is installed in this well. Monitoring wells GD-3, GF-11, <br />and GLUX-] were installed in 1988 and well GMP-I was installed in ] 990. Well GA-2 went dry <br />between the second and third quarters of 1994 and remained dry throughout 1995. <br />The locations of these monitoring wells aze shown on enclosed Maps No. 2-1 through 2-3. <br />Wells GD-1(2) and GF-1 are completed in the Twenty Mile Sandstone, while well GF-2 is <br />completed below the R coal in the U aquifer system. Seven wells, GA-I, GE-I, GD-2, GF-6, GP-1, <br />GP-5, and GP-6 are used to monitor the QR aquifer. Wells GD-3 and GF-11 are completed in <br />• baclcfill derived from the QR aquifer and, therefore, are also used to monitor the QR aquifer. Wells <br />GA-2, GB-1, GF 3, GP-2, GP-4, and GP-8 aze used to monitor the KLM aquifer. Seven wells, GB-5, <br />GC-1, GE-2, GF-4, GP-3, GP-7, and GMP-1 are used to observe changes in the HI aquifer. Wells <br />GF-5 and GF-7 are completed in bacldill material derived from the HI aquifer and are also used to <br />monitor the HI aquifer. Wells GB-2, GC-2, GE-3, P-8, 81-03a, and GP-9 are used to monitor the <br />3rd White Sandstone aquifer. Welt GE-3 is completed in both the 2nd and 3rd white sandstone and <br />well P-5 are completed in the 2nd White Sandstone between the G and F coals, while GLUX-1 is <br />used to monitor the First White Sandstone. Well P-3 is perforated in the Lewis Shale. Four alluvial <br />wells, GC-3, P-1, J-1, and COY are used to monitor the Flume, Pyeatt, and Johnson alluviums. <br />Wells GA-1 (QR aquifer) and GA-2 (KLM aquifer) will be removed beginning in 1996 due to the <br />D pit mitring. The backfill aquifer in this azea is monitored in GD-3 and GF-1 I and indicates similar <br />2-1 <br />