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Spring 2011 Subsidence and Geologic Field Observations <br />Box Canyon, Apache Rocks, and South of Divide Mining Areas <br />Thirteen photographic observation points have been established since 2007 (see Maps 1 and 2) to <br />view and assess changes that may occur as a result of mining. Many of these locations had been <br />used for annual comparative purposes even before being more formally established. Two <br />photographic observation points were established in the spring of 2007, seven points were <br />established in the fall of 2007, two points were established in the spring of 2008, and two <br />additional points were added during the fall 2009 site visit. <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 has since been maintained (see Maps 1 and 2) with the exception of <br />new points which are added as deemed appropriate. <br />All of these photographic observation points were visited during the June 20 -21, 2011 field visit <br />(see Maps 1 and 2 for these locations and associated number designations) except Photographic <br />Observation Point 6, 8, 8a, 9 and 11. Photographic Observation Point 6 is generally visited once <br />each year and typically when the leaves have started to fall. Photographic Observation Points 8 <br />and 8a were not visited due to the inability to use the access road to them as reported to us by <br />MCC staff. The Highway 133 landslides visible from Photographic Observation Point 9 were <br />not photographed because of the lack of any observed changes in these features over the last <br />several visits. Photographic Observation Location 11 is of the large rockfall along the North <br />Fork of the Gunnison River (North Fork) downstream of the loadout facility. This rockfall has <br />been periodically observed to assess what, if any, changes occur over time. Given its location <br />relative to current mining activities (see Maps 1 and 2), and those of the recent past, it was <br />considered an unnecessary location to photograph during the spring 2011 site visit. Each of these <br />locations is planned to be visited during the fall 2011 field visit (unless access limited). <br />831 - 032.793 <br />September 2011 <br />Wright Water Engineers, Inc. Page 14 <br />