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Fall 2007 Subsidence and Geologic Field Observations <br />Box Canyon, Apache Rocks, and South of Divide Mining Areas <br />• <br />• <br />• <br />~. -; -,~K. ,,,~. , - <br />~ ~ <br />w r ~ .+ T" <br />' , } ~ :~' ' , ~ "~ fit'. <br />k~ r, ~ <br />ll <br />a, ,~, ,,~ ~~ ,.~ <br />t Y ill ,~ ~r~f <br />~~~ ; t s~ <br />'~ ~~ ti :~" : ~: <br />t~j y \ ~ ~y „~ <br />-M ~• ~ ~ <br />y/- ~~. } ~ r yam, ~4~1. `^f ~~''~f1{t,.~ ~~ ~ <br />~•! ,d:. j g i. Ott '~ o' <br />J~ ~ r ~ ~ t ~ '* ~ ,11V'v ~ <br />~:~!' <br />~~' <br />Figure 25. Southward view of the excavation for the Deer Creek ventilation shaft and escapeway. Except for the <br />landslide area to the extreme right of the photo (middle right), the landslide area westward and southward of the <br />excavation area has been essentially inactive since 1963, based on USGS aerial photos taken in 1963. However, <br />the western half of the shaft excavation area transects the old landslide above it. <br />831-032.780 <br />November 2007 <br />Wright Water Engineers, Inc. <br />Page 39 <br />