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Mr. Steve Magnuson <br />May 6, 1987 <br />Page 4 <br />above, analyses usin3 non-circular failure surfaces yielded minimum factors of • <br />safety higher than those listed above. <br />These analyses indic~ite that factors of safety calculated for the New Elk Mine <br />refuse pile are above minimum criteria (dictated by the Coiorado MLRD), based <br />upon the conditions <ind geotechnical characteristics outlined in this letter. <br />If you have questions concerning this letter, please contact me. References <br />cited in this letter are listed in Attachment A. <br />Yours sincerely, <br />WATER, WASTE ~ LAND, INC. `,~~~~`~N~OUIS <br />~E~>~ ~~~~~ _ * `•.0 1930' <br />W: <br />C11nt Strachan, P.E. ~ N F X230, <br />Senior Geotechnical Engineer ~yTSS!oNa~;~?Q,e~~~ <br />Attachments ~iii~~j~pF"C{011 O`~~p~ <br /> <br />