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Fall 2017 Subsidence and Geologic Field Observations <br />South of Divide and Dry Fork Mining Areas <br />4.2 Traverse B -B' <br />Traverse B- % • wl-Ere111heJDier Qre& drainage meets the Dry Fork Road (Traverse A- $ - <br />and continues southward up the Deer Creek Road past two stock watering troughs (fed by a nearby <br />spring) approximately 0.75 miles to a `T' intersection with another road south of the headgate <br />entries of unmined E -seam Longwall Panel E7 (see Map 1). Two additional stock ponds (P74 and <br />P93) with earthen embankments are located lower in the drainage. Both of these ponds are also <br />fed by nearby springs. <br />This traverse is located above the E -South Mains and the western ends of mined E -seam Longwall <br />Panels E3, E4, and E5, as well as unmined E -seam Longwall Panels E6 and E7. Previous <br />observations of subsidence cracks were described on the MVB E5-20 pad beginning in the Fall <br />2015 Subsidence Report with follow-up observation discussed in both 2016 reports. The <br />subsidence cracks on and near the pad are well healed and becoming difficult to identify. <br />Where this Deer Creek Road crosses the USFS gate a short distance southwest of the two stock <br />watering troughs, several small earthen ridges and valleys were observed during the spring 2017 <br />field visit both on and adjacent to the road. A follow-up discussion of observations obtained from <br />our fall 2017 field visit at this location are provided below under Location 1. <br />No other subsidence -related features were observed along this traverse during our fall 2017 field <br />visit. <br />4.2.1 Location 1 <br />Location 1 is an area of approximately 100 feet in length along Traverse B -B' near the USFS gate. <br />As observed during our spring 2017 field visit, sections of soil and vegetation appeared to have <br />been randomly shoved together reminiscent of small thrust faults in which one section is thrust <br />into and over the other creating uplifted and down -dropped areas. Upon first inspection, the area <br />appeared to be have been heavily rutted from a large vehicle that had driven through when the area <br />was wet (Figure 1). However, the slope of the road leading up to the gate from the north would <br />not have allowed such features to have been created. South of the gate, features resembling the <br />surface expression of tunneling by a ground hog or shallow burrowing mammal were observed <br />831-032.799 Wright Water Engineers, Inc. Page 12 <br />February 2018 <br />