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Spring 2017 Subsidence and Geologic Field Observations <br />South of Divide and Dry Fork Mining Areas <br />4.1 Traverse A -A' <br />This traverse overlies portions of mined E -seam Longwall Panels E1 through E6. Traverse A -A' <br />originates just south of Monument Dam (and Minnesota Reservoir) and proceeds along Dry Fork <br />Road a distance of approximately 3.5 miles in a southeasterly direction to the Deep Creek Ditch <br />Rider's cabin at Point A'. The western end of this traverse is adjacent to Minnesota Reservoir and <br />outside the proposed E -seam mining influences of Longwall Panels E1 through E9. Parts of the <br />eastern end of this traverse are above the eastern end of E -Seam Longwall Panel E5 and E6. <br />Inclusion of the entire Traverse A -A' length is necessary to provide continuity with other traverses <br />that originate along this traverse and travel southward across the SOD and Dry Fork mining areas <br />toward Longwall Panels E5 through E7 (see Maps 1 and 2). <br />As observed during the spring 2017 field visit, many of the MVBs previously accessed via this <br />traverse (particularly those of Longwall Panels E1 -E4) have been reclaimed (see Map 1). Those <br />MVBs that have not yet been reclaimed are at the eastern end of the traverse where the Dry Fork <br />Road overlies mined E -seam Longwall Panels E5 and E6. <br />There are two sub -traverses that originate from Traverse A -A' and travel in a northward direction. <br />These include access roads to MVBs E5-5 and E5-6/7, as well as E5-1/2/3 and E5-4. Note that in <br />this report, a designation similar to E5-1/2/3 indicates one MVB pad containing three drill holes. <br />Also note on Map 1 that the surface and termination point of each drill hole is shown by a small <br />and large filled green circle, respectively, that are connected by a green line. <br />Thick soil and colluvium derived primarily from the Wasatch Formation is observed along <br />Traverse A -A' with E -seam overburden depths ranging from about 400 to 1,200 feet. The <br />estimated thickness of the surficial material ranges from about 75 to 250 feet. <br />No subsidence -related features were observed along this traverse during our spring 2017 field visit. <br />4.2 Traverse B -B' <br />Traverse B- % • wl>EreltlheJD&r QlreK 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 />831-032.799 Wright Water Engineers, Inc. Page 9 <br />August 2017 <br />