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Fall 2018 Subsidence and Geologic Field Observations <br /> Southern Panels Mining Areas <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 Southern Panels Mining Area <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 through E5 and the eastern half of Longwall <br /> Panel E6) have been reclaimed (see Map 1). Those MVBs that have not yet been reclaimed are <br /> accessed from other named traverses that connect to 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 fall 2018 field visit. <br /> 4.2 Traverse B-B' <br /> Traverse B- % • w11Tre]AheJD&r Qrebk 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 on the MVB E5-20 pad were described beginning in the Fall <br /> 2015 Subsidence Report with follow-up observation discussed in both 2016 reports. Each year <br /> since their first observation in 2015, the subsidence cracks on and near the pad are healing and <br /> becoming more difficult to identify. <br /> 831-032.900 Wright Water Engineers, Inc. Page 11 <br /> April 2019 <br />