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200o Subs,tlence and Geologic Fleld Observations <br />Box Canyon, West Flatiron, Apache Rocks, and South of 0iwde M,ning A!eas <br />•\ rr+ic++' ofa+nduunts and potential m the rucktall arra rcveal> tltr li+lluuing: <br />I. Baticd un tltc ++•eathrrin~~ charactcn,tics ui the fallen huuldrrs, at Icasl t++u cltiwtlcs of <br />rockfalls h:n•c occurccd u+cr thr post dcradcs-the first. man} decades ago, and the <br />>+•cond. a tc++ years ur ahaw a decade ago. <br />the o~'erhanging condition of much u(the clitT;trca and the rucktall eri.ndes places <br />the urco in ,; +vn hteh rucktall potential rategury. This is the highest category used in <br />the \\'est E.Ik ~1tnr .trc;t t \t:q+' I. <br />Une place currently sho++s a Iwtcntial titr inunutcnt slab lailurc ~+tthut the <br />uvrrh:utging arra <hoaro m figures 'i• 'r+ and '_?. <br />831-032.750 Wright Nlater Engineers. Inc Page 33 <br />Decamber 2006 <br />ficurc ?F, N'ca~+ara ~rctc o(thc nuktall area. sh,•antg tftc •,+crhanginc a.prct of the <br />:Idl anJ thr ntc,re ucathercd anJ tn•sh-I,•;,ku,g r„iks tlx• ~.~IJer, more ++eathcreJ nn'ka <br />ti•II uw ,d the +-shaped ,~+erit.u,g unidJle pn,unJl .uul thi• younger. tresh•lunkmg <br />houhlcn I:ukd in Btr larger ,nerheng (right middle ~rnunJ). :\n umtaMe•Innktne slnh.,r <br />rock t. located to the upper Ie(t 1'-;hap.Yl o~rrhung (Figure _'"1. <br />