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SPF'iWG 2iit;7 Subsidence and Geoloq¢ Fpld Obser.ano•+s <br />Box Canyon, and Sautn of Dwrde hlining Areas <br /> <br /> ~.,~ t.. r- ~•. <br />.~ '/~ <br /> <br />n.. ~ <br />11 <br />.,..rte-E!ti '~~ <br />~ ~ <br />~r+= ~, _=-,.r~ • •''j <br />v -jr. <br />. r ~ <br />' _ <br />/~-~~-, _. ;. 'mil c. ••~. ~'~ <br />• ~ ~~ ~ \ • Yl . . <br />~ ` s 7 <br />41 <br />~ <br />~ <br />_' ~ <br />li~~ <br />.. <br /> ~' <br /> ~ _ <br />, <br /> \-~ \. <br />r~ t r .. <br />~~ <br />FgmP 7 This ~:ut bank m hecrock Is localpd above mined long•wali panel +7 ~n an excava6dn area <br />al well site MD'J,' 17112 Cracks do erthp~ cede of the dom~nanl. rrregula• crack p:gnt midalel are <br />nnh Cal !r !hp •eSVq (d •'pn 5t•nct~i?n The I:`B5: prOTfiPrl} Irregrdv rrar,k r'~a5 a'- PSrTa!Pd 75 <br />:. h•'aal ~ke'tl, ~,~.. d;. b~rrl r. r.,. .=1a;e~~ <br />2.3 Desiccation Cracks <br />I)iSli l'ailUl) l'GIChti trill) A, UCi llr In iln YStVnr\ allll 411 t>tUnl'ti Irt Ihl' ~t C~i1\'rrllC it Oli h~':1 ~:Itlh <br />Pnnnations in the 11'cst Lik Mme urea ))here the ranks art ,ccalhcrtJ w ~lu\s doll .ilt. (Pleura <br />i1, 1"hr prla•rs nl da.irautieru invohr. Ihr ,prinking of pra\untsh welted clay. mtli silt. during <br />the devote peaces. <br />fkstccannn ar:tcks can olirn he recognrzad by there urrgular. branrhln, :md dnargulg pminrn <br />(c.. regular th:ut tvp,icul suh~idrncr rr,fik~, Aumc ul'thc )degas) dcsrccation .rack. in the \1'asl <br />tak \Lnr urea w'crr ub.rrrvcd in elec. of Ihr liunrn Memhcr ul the \Irsa\crdr Porntenun m the <br />Ilorsc (ful.h'\luntr;lrl^ Ka~cn,+lr orc~ wttcrc there hall peen no munne. The larerr, nu,rc <br />regul:lr dr~icc:uton cr:lck: and lunsinu•tion crocks miry hr coniil>cd with >uhsidrnca :rarF.s m <br />urea. \\harr nunur: h:rs oc.•urrod. Ilo\1'c~er. Ir:rn,\crsr anJ lunguulhnal tcnswn .rusks ::m~cd <br />by suhsuicnl:a hn\r a definite spatial rclali.ni.hgi It, the geometry of the long\vall mining panel <br />r:nuufe Ihr real ks. <br />831-032.180 Wngnr Water Engineers, Inc. Page 5 <br />July 2007 <br />