2007-03-16_REPORT - C1981010 (8)

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2.0 GROUND -WATER LEVELS Water level or water pressure have been measured in 30 wells at Trapper Mine in 2006. Wells 81 -03A, GF-4, GP -3 and GP-4 were flowing wells in 2006 and pressure readings on these wells have been converted to static water head in feet above the measuring point. The water levels are prefixed by a negative sign to indicate a water level above the land surface. Wells GA -1 and GA -2 were destroyed by mining in 1996 (see Hydro - Engineering, L.L.C., 1997 for where these two wells were located) and well GP -1 was destroyed by mining in 2003 (see Hydro- Engineering, LLC 2003). Monitoring of wells GB -1, GB -2, GB -5, GF -1, GF -2 and GF -3 ceased at the end of 2003. Wells 81 -03A, GE -1, GE -2, GE -3, GLUX -1 and GP-6 were monitored only a portion of 2006 prior to their removal from monitoring. The locations of the monitoring wells are shown on enclosed Maps No. 2 -1 through 2 -3. Well GD -1(2) is completed in the Twenty Mile Sandstone. Five wells, GE -1, GD -2, GF -6, GP -5, and GP-6 are used to monitor the QR aquifer. Wells GD -3 and GF -11 are completed in backfill derived from the QR aquifer and, therefore, are also used to monitor the QR aquifer. Wells GP -2, GP-4, and GP -8 are used to monitor the KLM aquifer. Six wells, GC -1, GE -2, GF-4, GP -3, GP -7, and GMP -1 are used to observe changes in the HI aquifer. Wells GF -5 and GF -7 are completed in backfill material derived from the HI aquifer and are also used to monitor the HI aquifer. Wells GC -2, GE -3, P -8, 81 -03A, and GP -9 are used to monitor the 3rd White Sandstone aquifer. Well GE -3 is completed in both the 2nd and 3rd White Sandstone and well P -5 are completed in the 2nd White Sandstone between the G and F coals, while GLUX -1 is used to monitor the 1st White Sandstone. Well P -3 is perforated in the Lewis Shale. Four alluvial wells, COY, GC -3, P -1 and J- 1, are used to monitor the Flume, Pyeatt, and Johnson alluviums. Trapper Mining Company 2 -1 2006 Annual Report