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Mr. Dan Worden <br /> April 18,2008 <br /> Page 3 <br /> analysis. Additionally this assumes that the slope will be mined at a 3:1 (horizontal to vertical) <br /> configuration. For reference,we have included graphical outputs of our analysis. <br /> RECOMMENDATION <br /> In summary,a 15-foot setback from the top of the highwall to the centerline of the slurry wall is <br /> required assuming a 3:1 (horizontal to vertical)mine slope. <br /> Please call if you have any questions or comments. <br /> Sincerely, <br /> DEERE&AULT CONSULTANTS, INC. <br /> Scott A. Palmer,P.E. <br /> Project Manager <br /> Colby J.Hayden,P.E. <br /> Principal,Project Manager <br /> SAP:sp <br /> Attachments <br /> PX0134 HaR lmin Cbnsx iion`D13402S Knby-Dcsabam Pits\Cc—spondrncOSIabilcy Analysis krdoc <br />