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• L_.ase-----_~ectign_H_E <br />The fallowing table presets the results of {:he stability analysis. <br /> Radius of Number Minimum <br />L~UOrUina.Y_as of Center f=ailure of Radi>. Safety <br />__._Hor_. Vert_ _51_ir'Face_ a.t._,Center_ F~ar_ter_ <br />1J/. -ilia lrjll,!pIII 1~(1,IIIIII I 175.J111 <br />1.%',.', ~~i l~l 1'7'.__ l~". ::' 1 1~~1. /58 <br />13ti, ~i!iri ~2!i. iICiO iBQ, i1!ir_1 1 t26. ?EJ~= <br />1 •;7.`j,'_II_I!1 ~1_.. __ 1/_..___ 1 1.^_n. o4~_I# <br />2111, 111111 2(Ib. 6G7 16G. 66! 1 128. <"1'36 <br />i.''.J.!1!111 ~il(1„111111 ibil,l}1:111 1 1'i~)S;, <br />#Mi n i nlum Factor of safety <br />The minimum 'Factors of safety determined for Cases 1 and 2 were <br />in e::cess of the required 1..=. <br />PEI~R CRCEk: 1=SIN :;REa <br />Map i.'~++-1~-== contained in tt~e S'olnerset I•tine Mining and F'eclamation <br />Plan (page 2.116-1~~1 shows a plan view of the fan are:.a. Cross- <br />sections A-A. P-P and C-C are shown on Map AA-1'71 ipage 2.06-%!. <br />• U. S. Steel hlining Co cc'nd'_)cted a field investigation to determine <br />the a.ppro;:imate geologic structure of the cross-sections. G:hib>.ts <br />F, G and N were prep_.red fc'11owLny the Investigation. Preliminary <br />c;, ].rl_Ilations on cross-sections E-R and C-C indi.ca.ted that they <br />did not rneef the required minimum safety far_tor. U. S. Steel <br />ih>.nr.r~y Co. proposes to reyr:,de the area to the modified slopes <br />shown on E;:hib>.ts G and H. <br />Casie 1 -' :~eCtl On a-Fa <br />it~e f~~llowiny table presets the results of the stability analysis. <br /> Radius of Number Minimum <br />Coordinates of Center Failure of Radii Safety <br />Hor. Vert. Surface at Center Factor <br />1J11,{11111 14lJ,11i11) YI1~111111 :J .:.Ji_ <br />1 ,`.:ri 1, 1111(1 126. b6~~ %6. bbl v :. 62J <br />1J1_I.111111 il~.__: 6'..___ J ~.13.~_'!1 <br />s J.J.'If 111 t.}J.Ill lfl 144. 191 11 1.620# <br />~JJ. I II III c _ 1.667 1 11, 9:11 11 ~. 172 <br />#IN>.nimum factor of safety <br />C <br />