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Fall 2018 Subsidence and Geologic Field Observations <br /> Southern Panels Mining Areas <br /> Where the Deer Creek Road crossed through the USFS gate a short distance southwest of the two <br /> stock watering troughs, several small earthen ridges and valleys were observed during the spring <br /> 2017 field visit both on and adjacent to the road. The area has been regraded, as discussed in the <br /> Fall 2017 Subsidence Report, and all evidence of the subsidence-related features has been <br /> removed. <br /> No other subsidence-related features were observed along this traverse during the fall 2018 field <br /> visit. <br /> While not officially considered part of Traverse B- °/(effort was made to view the area south of <br /> the °/location (i.e., over proposed E-seam Longwall Panel E14). A reconnaissance trip through <br /> the middle of this proposed panel on an existing two-track was performed to assess conditions. <br /> Observations were such that we found no reason to modify the landslide and rockfall areas <br /> represented on Map 2. No other geologic hazards were observed. <br /> 4.3 Traverse C-C' <br /> Traverse C-C originates in the Deer Creek drainage adjacent to the lower stock pond (P74) and <br /> proceeds eastward, trending north and then south, over mined E-seam Longwall Panels E2, E3, <br /> E4, E5, and E6 (see Map 1) as well as portions of unmined E-seam Longwall Panel E7. E-seam <br /> overburden depths along this traverse vary from 450 feet in the Deer Creek drainage to <br /> approximately 900 feet over mined E-seam Longwall Panels E4 and E5. <br /> Numerous MVB pads have been historically accessible from this traverse including E3-6, E3-12, <br /> E3-17.5, E3-21, E3-25, E4-15, E4-16, E4-17, and E4-18 over mined E-seam Longwall Panels E3 <br /> and E4, as well as E5-17 and E5-18 over mined Longwall Panel E5. Each of these pads has now <br /> been reclaimed. <br /> In 2016 and again in 2017, this traverse was extended southward across E-seam Longwall Panel <br /> E6 (now mined) and E-seam Longwall Panel E7 (partially mined). This extension provides access <br /> to the E6-13 and E6-14 MVB pads, as well as the MVB E7-12 pad. <br /> Previously reported subsidence-related observations over E-seam Longwall Panels E2 to E5 are <br /> no longer visible with the exception of the slump adjacent to the drill road above the Deer Creek <br /> 831-032.900 Wright Water Engineers, Inc. Page 12 <br /> April 2019 <br />