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2066 Subs~donce end Gaolog~c Fietd Observations <br />Box Canyon. West Hatiron. Apache Rocks. and South of Drvrtle Idining Areas <br />5.0 CONCLUSIONS <br />I. l he conceptual nuxlel ptr:ented in Exhibit 60 has been eerilied over the pall 11 years of <br />annual liehl ohsenations in the ~4'cst Elk A4mr area. -Chic busie concept comprises <br />Inngwull cxlraetiun and unttitrnt dowmt~arputg of the overhunlen materal us laterally <br />constrained multiple beams tin two dimensions or plat~w (ut three dimensir+ns). -this <br />concept :gq,lics in thr cunlinuuus .letium;di„n ;rod nrar .urt;tcr i,+nr .n discus,ed in <br />Ei~hihit htr, <br />l'ndor this coneupt of unilbmt IongwuU extraction and related uniti,mt downwarping of <br />the o~.:rhurden nuks and uncortsulidatc~l material as laterally conanincd pl:dc•,, cracks ut <br />onus under tensile arcs. narrow with depth..uu1 close at the neutral surl;rcc. E3elow the <br />neutral surtace• the tune ul tensile stress ^hnce the neutral surface Meeumes a lone of <br />cumpressi~e stress helots it. <br />831-032 750 Wright Water Engmears, Inc Pago 40 <br />Decombor ZOOG <br />I i¢urc 12 \1cw o(thr anmc landshd. a.:hnun m Figure 31. but taken m lul} 'au5 <br />