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• <br />Fall 2014 Subsidence and Geologic Field Observations <br />South of Divide and Dry Fork Mining Areas <br />to differential settlement. Figure 2 shows this pad from a similar location during the fall 2014 field <br />visit and evidence of the healing process at work on these cracks. <br />Figure 1. Northward view during fall 2013 site visit <br />of several en echelon subsidence and differential <br />settlement cracks on the west side of the MDW <br />E4 -8 pad. These cracks have a slight arcuate <br />shape open to the west. <br />3.3 Photographic Observation Point 1 <br />Figure 2. Fall 2014 view of the same area as <br />Figure 1 looking in the same general direction. <br />Note how cracks have weathered with less defined <br />edges and infilling from sediment. <br />This photographic observation point is located along Traverse C -C' (Dry Fork Road) east of <br />Minnesota Reservoir and near the first crossing of Dry Fork. This photographic location was <br />established to view an area of free - standing sandstone columns (or stacks) above the eastern end <br />of E -seam Longwall Panel E1 to observe evidence of subsidence. Photographs obtained regularly <br />since spring 2010 have provided no evidence of additional rockfall or column failure at this <br />location. No comparative photographs are therefore presented in this report. <br />831 - 032.796 Wright Water Engineers, Inc. <br />March 2015 <br />Page 8 <br />