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O TETRA TECH <br />Results <br />Table 2 presents the results of the slope stability analyses for the waste rock pile. The safety <br />factors indicate that the slopes for the proposed operating and reclamation conditions will be <br />stable for both static and pseudo static conditions. The failure envelopes corresponding to the <br />factors of safety presented in Table 2 are included in Figures 1 through 4 with this <br />memorandum. <br />Table 2 Results of Slope Stability Analyses <br />Slope Evaluated Loading Condition <br />(pcf) Factor of Safety <br />(deg) <br />ti <br />diti <br />O <br />C Static 1.4 <br />pera <br />ng <br />on <br />on Pseudo static 1.3 <br />R <br />l <br />i <br />C <br />di <br />i Static 2.4 <br />ec <br />amat <br />on <br />on <br />t <br />on Pseudo static 2.2 <br />References <br />GEO-STUDIO, International, 2007, Calgary, Alberta, Canada. <br />Lambe & Whitman. (1969). Soil Mechanics. John Wiley & Sons. New York. <br />USGS (http://earthquake.usgs.gove/research/hazmaps/). <br />Tetra Tech 2 <br />3801 Automation Way, Suite 100, Fort Collins CO 80525 <br />Tel 970.223.9600 Fax 970.223.7171 www.tetratech.com <br />P:\ 181736 Denison USA\Slope Stability\Slope stability tech memo.doc