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Spring 2013 Subsidence and Geologic Field Observations <br />South of Divide and Dry Fork Mining Areas (E -Seam) <br />Figure 3. Northwestward view during spring 2013 site visit of numerous subsidence cracks on the <br />MDW E4 -10 well pad. Eleven of these sub - parallel cracks were noted across the pad with most <br />located at or near the road entrance. <br />4.3.3 Location 3 <br />Location 3 is the MDW E4 -8 pad. Three prominent sub - parallel subsidence cracks were observed <br />on the northwest corner of this MDW pad each with a general north -south orientation. Maximum <br />dimensions on these cracks included 1.25 inches in width and 8 inches in depth. Two of the cracks <br />were within the level portion of the pad (Figure 4) while the third was located on the crest of the <br />loose berm material at the edge of the pad (Figure 5). Longwall mining had occurred beneath this <br />location less than one week prior to our spring 2013 field visit. The E -seam overburden depth at <br />this location is approximately 1,050 feet. <br />4.4 Photographic Observation Point 1 <br />Photographic Observation Point 1 (previously Photographic Observation Point 12) is located along <br />Traverse C -C' west of the Dry Fork Road crossing of Dry Fork. This photographic location was <br />established to view an area of free - standing sandstone columns (or stacks) above the eastern end <br />of E -seam Longwall Panel E1 to observe evidence of subsidence. <br />831 - 032.795 Wright Water Engineers, Inc. Page 13 <br />September 2013 <br />