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Fall 2007 Subsidence and Geologic Field Observations <br />Box Canyon, Apache Rocks, and South of Divide Mining Areas <br />• show rockfall/landslide activities increased signit7cantly after longwall mining occurred beneath <br />this area (i.e., compare Figures U-7 and D-~) and that there has been some, but minor, changes <br />since April ?1107 (i.e., compare Figure D-K and I~igurc 22). <br /> <br />• <br />[n addition, a new photographic observation point ? (photographic observation point ~ of the tall <br />field visit, Map I) was established in April 2007. [t provides a more complete view of the <br />headscarp area (Figure 23). Future attempts will be made to visit this location for annual <br />comparisons. <br />• <br />831-032.780 Wright Water Engineers, Inc. Page 36 <br />November 2007 <br />Figure 22. Eastward telephoto view from fall 2007 of the headscarp area shown in Figure 23. Photo <br />is taken from photographic observation point 4 (Map 1). Note that location 8 of this report is at the <br />top of the scarp above the right side of the left rockfall/landslide (upper left part of image). The active <br />rockfall/landslide on West Flatiron can be seen in the left background. <br />