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Mr. Allen Sorenson <br />February 28, 2002 <br />Page 4 0/4 <br />The recommendation from the results is to establish an offset distance of 90 feet, from structure <br />to top of excavation slope. As indicated, the recommended offset distance is for both the West <br />SSA and South SSA for protection of structures from damage and equals twice the proposed <br />mining depth. <br />Thank you for you time and consideration of this matter. <br />Sincerely, <br />Banks and Gesso, LLC <br />~~~ <br />Ross Horvath, P.E. <br />enclosures: <br />cc: 20075-Stud ies-Current-DMG-SSAnalysis <br />