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Fall 2017 Subsidence and Geologic Field Observations <br />South of Divide and Dry Fork Mininq Areas <br />(Figure 2). There were no obvious cracks from which length, width, and depth measurements <br />could be obtained. The E -seam overburden depth at this location is approximately 600 feet. <br />Observations made at the same locations during our fall 2017 field visit found little remaining <br />evidence of the features described above. While relatively recent mechanic regrading of the road <br />through this reach was a significant factor in our inability to locate these same features, <br />observations away from the road in ungraded areas were similarly unable to identify continued <br />evidence (Figures 3 and 4). <br />Figure 1. Southward view (spring 2017) toward <br />the USFS gate along Traverse B -B showing <br />sections of soil and vegetation that had been <br />shoved randomly together creating uplifted and <br />down -dropped areas on both sides of the gate. <br />Figure 2. Southward view (spring 2017) away <br />from the USGS gate along Traverse B -B <br />showing additional sections of soil and <br />vegetation that had been shoved randomly <br />together after the longwall mine passed <br />beneath the area. <br />831-032.799 Wright Water Engineers, Inc. Page 13 <br />February 2018 <br />