2013-09-27_REPORT - C1980007 (4)

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Spring 2013 Subsidence and Geologic Field Observations South of Divide and Dry Fork Mining Areas (E -Seam) Identified subsidence - related features in the SOD and Dry Fork mining areas were examined and photographed during the spring 2013 field visit to assess changes since the last observation or to record newly observed features in the active mining areas for future reference (Maps 1 and 2). Field observations were made from a 4 -wheel drive vehicle and by foot to efficiently complete the required work. Thirteen photographic observation points had been established and used since 2007 to view and assess changes that may occur as a result of mining (mostly within the B -seam mining areas). Many of these locations had been used for annual comparative purposes even before being more formally established. Beginning with the spring 2013 field visit, nine of these points have been removed pending substantial changes in those areas. Four of the established photographic observation points were maintained given their location within, or overlooking, the E -seam mining areas. The two points within the mining area (historically referred to as Photographic Observation Points #12 and #13) were revisited and renamed as Photographic Observation Points #1 and #2. An annually visited location overlooking the Dry Fork drainage and areas to the south (formerly Photographic Observation Point #6) was not visited during the spring 2013 field visit but renamed Photographic Observation Point #4. The Minnesota Reservoir /Monument Dam overlook location (formerly referred to as Photographic Observation Point #7) was again visited and renamed Photographic Observation Point #5. Three new locations were established during the spring 2013 field visit. Photographic Observation Point #3 is located above E -seam Longwall Panel E4 with a view of the Dry Fork drainage above the central portion of E -Seam Longwall Panels E2 through E7. Photographic Observation Point #6 is above E -seam Longwall Panel E4 and provides an elevated overlook into the Deer Creek Drainage from its east side (i.e., western ends of E -seam Longwall Panels E3 through E7). Photographic Observation Point #7 is an elevated overlook from very near Photographic Observation Point #6 that provides views of central and eastern ends of E- Seam Longwall Panels E 1 through E7. Photographs from each of these locations are provided in this report as a baseline against which future images will be compared. 831 - 032.795 Wright Water Engineers, Inc. Page 7 September 2013