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SubTerra, Inc. Peabody Twentymile Coal LLC 09/27/2014 <br />Foidel Creek Mine <br />Permit Revision for Longwall Mining in the Wolf Creek Seam - Subsidence Evaluation <br />The combination of a maximum predicted tensile strain of x-0.005 and relatively thick cover of marine <br />shale over the Twentymile sandstone in the study area will decrease the potential for surface cracking <br />or fissuring. The potential for water loss under these conditions is extremely low. <br />In addition, no evidence of "stream pirating" has been observed during extensive undermining of Fish <br />Creek and its AVF by Panels in the Wadge Seam in the Northern Mining District. <br />4.4. Monitoring Requirements <br />Visual inspection and conventional or GPS surveys of the undermined Fish Creek areas may be used <br />to confirm the predicted effects of mining. This methodology has previously been successfully used in <br />the Eastern and Northern Mining District at the Foidel Creek Mine's Wadge seam. <br />11 PN: 2013 -26 <br />