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Spring 2018 Subsidence and Geologic Field Observations <br />South of Divide and Dry Fork Mining Areas <br />overlying the active portion of the mine and on documenting baseline conditions in areas that have <br />yet to be mined. For this reason, observations from our spring 2018 field visit were focused on <br />areas above E -seam Longwall Panels E6 and E7 in the SOD and Dry Fork mining areas. <br />Readers should note that observations are discussed relative to traverses along segments of drill <br />roads providing access to drilling pads containing mine ventilation boreholes (MVBs). Given the <br />dynamic nature of the mining activities (i.e., adding and reclaiming of road segments and MVB <br />pads), future naming of traverses will likely vary from report to report. Efforts will be made, as <br />practical, to keep traverse names the same. Specific nomenclature for observed features will be <br />regularly represented on Map 1 of each report. <br />831-032.900 Wright Water Engineers, Inc. Page 6 <br />August 2018 <br />