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2006 Subsidenco and Geologic FIeIA Obsarvabons <br />Boz Canyon, Wesl Flatiron, Apacha Rocks, and South of Divldn Mining Areas <br />The owrhurden depth to the 13-Scam is :[bout 1.90 ~eet.:Uthuugh longwall panel I d u•as mined <br />about li,ur year. ago. and suhsuicnce is predicted to hate hecn completed long ugu, wbsickncc <br />effects could Gill have some impact hecnuse of the very rugged topography in the urea. <br />Nu,v regctation can he ohsen'ed in portions of the tall area, panc~ulurl}' in the lower part. ~chich <br />indicate. same stabihly in the thll arra. llowevcr, frlctw•es to Ihr massive sandaune cIi1T <br />indlcute that more rockfalls will eventually occur wider the influence of gravity, frcriing, and <br />th:m ing. <br />811.032.750 W nght Water Engineers, Inc. Page 22 <br />Docombar 2006 <br />Ihgurc 1' l.Iphill Inorthwenll +'tc„' of a nxkl:dl located ubo,c the <br />dull mad to \1 cst F lamm~ lhr mrktall :vre appcarv more rcgctatal <br />Ihnn a did L,..I yrdr, indicating .nmc degr~t: of stah8in \k+rc « irks <br />will likely end along jront~ and fr.,cturc.. end tall „nh hrnr and truh <br />the ctli'cts c+l gn,tly. fircrmg and ihautng. <br />