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Spring 2018 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 Panels 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 past several field visits, many of the MVBs previously accessed via this <br />traverse (particularly those of Longwall Panels E1 -E5) have been reclaimed (see Map 1). Those <br />MVBs that have not yet been reclaimed are accessed from other named traverses that connect to <br />Traverse A -A'. <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 soils and other unconsolidated deposits (surficial material) ranges from <br />about 75 to 250 feet. <br />No subsidence -related features were observed along this traverse during our spring 2018 field visit. <br />4.2 Traverse B -B' <br />Traverse B- % • wlkrelCeJD&er 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 />831-032.900 Wright Water Engineers, Inc. Page 9 <br />August 2018 <br />