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2005 Subsidence antl Geologic Fieltl Obsorvauons <br />Boz Canyon, Wesl Flatiron, Apache Rocks. <br />and Soulh of Diwde Mlning Areas <br />~:_ <br /> <br />t t r <br />• <br />~_ <br />r <br /> ,~.. <br /> <br /> <br />y. f ' ` K <br /> <br />~~ <br />~. <br />L <br />` z ,fltl f ~,~ ~t <br />y 1 Y )IJM1 <br />~' <br />~ <br />~ <br />yf <br />~ <br />> ~ <br />~ '. <br />i /v. <br />...p <br />t <br />.l'am`. i . ~ <br /> <br />,~, . , <br />Figure 12. Northwestward wew of the east rim of West Flatiron. A high, natural rockfall potential exists In <br />a 200- to 300-toot zone below the West Flatiron rim. A rockfalU landslide combination, which is located <br />above eastern part of un•mtned longwall panel 19. can be seen to the upper right part of the image below <br />the two massive, (orated sandstone cults. <br />Figure 12A, Figure 14 from the 2004 Apache Rocks and Box Canyon report (Dunrud 2004a): Wostward <br />view showing rocks that have likely slabbed off the uppermost sandstone cldls of the Ohio Creek Member <br />of the Mesaverde Format,on (which begins at the top of the image) and have now perched on ledyas <br />below A small landslide can be seen at the bottom center of image. <br />83t~032 Ito Wnght Water Engineers. Inc. Page 28 <br />November 2005 <br />