2020-03-19_REPORT - C1981010 (7)

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2.0 GROUND-WATER LEVELS Water level or water pressure has been measured in 26 wells at Trapper Mine in 2019. Wells GD-2, GF-4, GP-3 and GP-4 were flowing wells in 2019 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-I, 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 ceased monitoring in mid-2006 after 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. Four wells, GD-2, GF-6, GLEV-1 and GP-5 are used to monitor the QR aquifer. Wells GD-3 and GF-I I 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-I, GF-4, GLEV-3, 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, P-8, and GP-9 are used to monitor the 3rd White Sandstone aquifer. Well P-5 is completed in the 2nd White Sandstone between the G and F coals. Well P-3 was perforated in the Lewis Shale and monitoring of this well ceased in late 2016. Five alluvial wells, COY, GC-3, GLEV-2, P-1 and J-1, are used to monitor the Flume, Deacon, Pyeatt, and Johnson alluviums with two of these wells completed in the Flume alluvium. Trapper Mining Company 2-1 2019 Annual Report