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SubTerra, Inc. Twentymile Coal Company 6/1412014 <br />Wolf Creek Seam Extraction <br />100% <br />90% <br />80% <br />t <br />� <br />70% <br />E 60% <br />CD <br />cn <br />0 <br />G 50% <br />rn <br />R <br />c <br />m <br />240% <br />a <br />LL <br />w <br />30% <br />m <br />U <br />w <br />:a 20% <br />(n <br />10% <br />0% <br />V CP <br />Figure 2 - Maximum Subsidence vs Width /Depth Ratio for the Foidel Creek Mine <br />O N N rV <br />Panel Width /Depth <br />■ Wedge Seam Extraction Wolf Seam Extraction <br />Jan 2014 NMD Subsidence Prediction Rev 23.xls: Figure 2 PN: 2013 -26 <br />A ■ ■ <br />s� <br />i <br />■ <br />■ <br />• <br />■ <br />A <br />■ <br />i <br />O N N rV <br />Panel Width /Depth <br />■ Wedge Seam Extraction Wolf Seam Extraction <br />Jan 2014 NMD Subsidence Prediction Rev 23.xls: Figure 2 PN: 2013 -26 <br />