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Fall 2019 Subsidence and Geologic Field Observations <br /> Southern Panels Mining Area <br /> h <br /> 4. <br /> st � <br /> e <br /> ®q A 1Y <br /> Figure 2. Southeastward view during the fall 2019 field visit of the same area <br /> shown in Figure 1. Note that the closest crack has been completely filled with <br /> sediment due to weathering. <br /> 4.3.2 Location 2 <br /> During the spring 2019 field visit, a new subsidence crack was observed approximately 1,000 feet <br /> north of the E6-14 MVB pad (Figure 3). This crack (orientation of N70°W) had a pronounced <br /> elevation offset of 6 inches from north to south and extended completely across the road and <br /> beyond (20+ feet in length). The maximum dimensions were observed to be 24 inches both in <br /> width and depth. This location is over the tailgate entries of E-seam Longwall Panel E7 where <br /> tensional stresses are somewhat greater. E-seam overburden thickness at this location is about 800 <br /> feet. <br /> Observations made during the fall 2019 field visit found that the crack was still evident with signs <br /> of weathering. The maximum dimensions observed during the fall 2019 field visit had not changed <br /> and neither had the elevation offset of about 6 inches from south to north across the crack. <br /> 831-032.910 Wright Water Engineers, Inc. Page 14 <br /> February 2020 <br />