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2006 Subsidence and Geoloyic Field Observations <br />Box Canyon, West Flatiron, Apacho Rocks, and South of pivide [fining Areas <br />3.0 OVERVIEW OF 2006 FIELD STUDIES <br />A •l-t~hrcl drnc ~ehtclr ~~;ts a>ed t„ ~ttirlruti~ r,nulu~t Ihr field uhsrr~auun:. Ilu, i> Ihr third <br />year a private vehicle was usal to conduct main ut' the tracrncs and titcilitatc li>ot travels to <br />sprrifir oft-road locution>. <br />Prior ticlJ ubscrcatiuns and rxprrirnrc in the \\'r~t I Ik ~1inc ;troa during find studies over Ihr <br />lasl I 1 ycan' indiratr that xuhsidrncc icatures Icrarks and hulgrsl arc most ctsihlc un roods and <br />traih. where the ground is more compact and lire of hrush. "these areas were Ihcretix-r srlrctr<I. <br />in addition lu undrnnined arras tfrc of hntsh, in ardor to must rtticiently ohtuin maximum <br />whsidrnre in(utntation. <br />Suhsnfcncc ohacrvatiuns were runductrd in the Box C;myun and :lparhr Rocks mining arr;t.:utd <br />along the wcstent edge of the 1~'est flatiron Honing urea. Thr maximum rastrm pn+lcrtiuns of <br />longwall panels 18, Ic1, ?0, and 21 were nu+~ed wrshvurcl compared to the 'nn; pn+~rrhon. <br />sn that only the eastern edge of lungttall panels 1S, Itl, and 2(I arc Incutcd in the \\'ra Flatiron <br />mining area 1 f\1up I ). <br />1'he n+rkfiill1:uxlshdr arras in the Box ('angan ;nul :1pachr Rucks mining areas were rxamutcd <br />and phinogr:gthrd to ec:tluatr rhang~s ~inrr last your. and to rrcurc! their runditiun ti+r linurc <br />rcicrcnce. ;\ geological rngincYring appraisal was romplrtcxl of the Dccr ('rock \'rntilatiun <br />Shaft and Gsr:tprauy area us well as the rorkfall area near the Brur \linr portal in the ('-tirant. <br />"fhc Derr ('reek Shafts will provide crnldatiun and un rscuprwuy ti+r the F. Scam none workings <br />in the South of Dicidc mining area. 'fhc mckl:dl area, lue:ttrd near the Bcar Mine portal. is of the <br />site o(mt old road under ronsidrratirnt tier use to arrrs~ a planned stvrugr aria. <br />~ Annum .uh~tdcnrr ;u,J ga•logt[ luuard n'•t+ort<arc kc•t~t ;n Woumnm Cool Compam, LLC and nt the < nlor~dn <br />Di~~si,m of >tirrcrals and G..+lugy.:~. well a> r~h,hns h, Etc txnn,t d~wunumt 11':xhtt+it< NI, h(+A, :uxt r,h81 <br />611-037. 750 Vlnyht Water Engineers, Inc Pago 8 <br />pecemher 2006 <br />