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Subsidence Profile, B-Line <br />Twentymile Coal Company, Foidel Creek Mine <br />6950 <br />a~ <br />c 6900 <br />0 <br />c~ <br />a~ <br />w <br />~ 6850 <br />m <br />6800 <br />0 500 1000 1500 2000 2500 3000 <br />Profile Distance (feet) <br />~_ Pre-mining Surface ~ Post-mining Surface <br />December 1992 <br />