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Fall 2015 Subsidence and Geologic Field Observations <br />South of Divide and Dry Fork Mininq Areas <br />3.12.4 Location 6 <br />Fall 2015 observations of the WB E5-17 pad provided continued, albeit much reduced, evidence <br />of the subsidence cracks originally noted during our spring 2015 field visit. The long, <br />discontinuous crack, as previously observed running the entire length of the pad from southwest <br />to northeast, was virtually non-existent. The only remaining evidence was at the fenced area of <br />the well head. Figures 10 and 11 provide a visual comparison of the subsidence cracks during the <br />spring and fall 2015, respectively. <br />This pad is located above the tailgate side of E -seam Longwall Panel E5 where E -seam overburden <br />is about 900 feet. Previous observations at a shallow depth within the cracks suggests the presence <br />of a thin, brittle sandstone layer beneath this pad approximately 6 to 12 inches below the surface. <br />N' 4_'V <br />f y <br />IN, <br />k µ1`��la"il �E7 t / <br />Figure 10. Southwestward view of the MVB E5- <br />17 pad during spring 2015 showing a portion of <br />the longest observed discontinuous subsidence <br />crack on the pad. <br />Figure 11. Fall 2015 view of the same area as <br />represented in Figure 10. Note that there is no <br />continued visual evidence of the subsidence <br />cracks in the middle foreground. <br />831-032.797 Wright Water Engineers, Inc. Page 17 <br />March 2016 <br />