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Spring 2009 Subsidence and Geologic Field Observations <br />Box Canyon, Apache Rocks, and South of Divide Mining Areas <br />• <br />• <br />unmined portion of Longwall Panel E1. Observations evidence suggests that these latter cracks <br />are the result of differential settlement of portions of the pad where the greatest amount of fill <br />was placed. <br />• <br />831 - 032.791 <br />November 2009 <br />Wright Water Engineers, Inc. <br />Page 4 <br />