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TWENTYMILE COAL COAMPANY - FOIDEL CREEK MINE <br />WESTERN MINING DISTRICT - SPRINGS AND SEEPS <br />S rin See Source Max. Drawdown and Notes <br />Boeddeker Spring Alluvium (spring/ seeps overlie Because Trout Creek Sandstone underlies the Wadge Coal Seam and is <br />#1 shale/sandstone units below Trout Creek separated by the underlying low-permeability siltstone/shale beds, there is <br />Boeddeker Spring Sandstone in stratigraphic sequence) little potential for a hydrologic connection. TCC has extensive drillhole and <br />#2 seismic data that does not indicate any faults within the planned Western <br />Bear Run Spring Mining District mining area, and mining to the western limits of the 17- and <br />House Spring 18-Left Entries has not encountered any faulting. Negligible potential for <br />Coyote S nn drawdown. <br /> <br />Gertie Spring #1 Alluvium (springs are in ephemeral and Because the Twentymile Sandstone is separated from the Wadge Coal Seam <br />Livestock Spring #2 intermittent drainages in units overlying by 670 feet of low-permeability, primarily marine shale overburden, and <br /> the Twentymile Sandstone) because subsidence-related fracturing of overburden rocks is unlikely to <br /> extend more than about 200 feet upward from the mined part of the Wadge <br /> Coal, there is little potential for hydrologic connection between the mine and <br /> the Twentymile Sandstone. Additionally, it is unlikely that faulting would <br /> provide a hydrologic connection (see above note regarding faulting). Minimal <br /> potential for drawdown. <br /> <br />Perry Spring #1 Alluvium (shallow perched groundwater Springs are above and upgradient from a previously mined area (Southwest <br />Perry Spring #2 in alluvium/colluvium overlying the Mining District), and were not impacted by the previous mining. Negligible <br />Perry Spring #3 Lewis Shale and Holdemess members potential for drawdown. <br />Perry Spring #4 <br />Perry Spring #5 <br />Perry Spring #6