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Fall 2018 Subsidence and Geologic Field Observations <br /> Southern Panels Mining Areas <br /> Figure 2. Southeastward view during our fall 2018 field visit of two parallel <br /> subsidence cracks that appeared as a result of recent longwall mining beneath the <br /> area. The sharp edges of the southern crack(furthest away in the image)suggests <br /> it is more recent than the closest crack, which shows rounded edges from vehicle <br /> traffic. The location of these cracks is about 300 feet south of the E7-12 MVB pad. <br /> 4.4 Traverse D-D' <br /> This traverse originates along the south side of the Dry Fork Road (Traverse A-A D Q G S <br /> southward up Poison Gulch (drainage east of Deer Creek). This traverse crosses mined portions <br /> of E-seam Longwall Panels E3, E4, E5, and E6, as well as unmined portions of E-seam Longwall <br /> Panel E7 (see Map 1). The E-seam overburden depth along this traverse varies from slightly less <br /> than 700 feet to almost 900 feet. <br /> Portions of this traverse south of Dry Fork provide access to seven MVB pads above mined E- <br /> seam Longwall Panels E5, E6, and E7 (i.e., E5-15, E5-16, E6-12, E7-8, E7-9, E7-10, and E7-11). <br /> MVB pads E5-15, E5-16, and E6-12 had been reclaimed as of the fall 2018 field visit. <br /> A sizeable differential settlement crack on the MVB E6-12 pad was originally observed at this <br /> location during both the spring and fall 2016 field visits. Both 2016 visits pre-dated longwall <br /> mining beneath the area, providing confirmation that the crack was the result of differential <br /> settlement. As of our spring 2017 visit, longwall mining had passed beneath this area with the <br /> 831-032.900 Wright Water Engineers, Inc. Page 15 <br /> April 2019 <br />