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Fall 2008 Subsidence and Geologic Field Observations <br />Box Canyon, Apache Rocks, and South of Divide Mining Areas <br /> <br />11 <br />• <br />established along the Box Canyon road to assess any changes to a series of sandstone outcrops on <br />the east side of the canyon immediately above Longwall Panel 18 where the B-seam overburden <br />thickness is between 700 and 800 feet. <br />The number designations for these photographic observation points do not reflect the order in <br />which they were established but rather the order in which they were visited during the fall 2007 <br />field visit. This convention will be maintained (see Maps 1 and 2) with the exception of any new <br />photographic observation locations added as deemed appropriate. <br />Nearly all of these photographic observation points were visited during the June 4 and 5, 2008 <br />field visit (see Maps 1 and 2 for these locations and associated number designations). As <br />previously noted, no additional points were added during the October 2008 field visit. Only <br />Photographic Observation Points 6, 8, and 11 were not visited. Points 6 and 11 were not visited <br />primarily due to the lack of mining activities in the area and the fact that they were visited four <br />months prior (June 2008). Point 8 was not visited because access to that area was restricted due <br />to the recent rockfall/landslide in Sylvester Gulch which blocked the access road. It is <br />anticipated that each of the standardized photographic observation points will be visited and <br />photographs obtained during future field visits as may be appropriate. <br />831-032.790 <br />December 2008 <br />Wright Water Engineers, Inc. <br />Page 16