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Harry Ranney <br /> May 15, 1992 <br /> Page 2 <br /> The estimated disturbed acreage for the life of the mine is <br /> reduced as a result of the revised mine plan from 260 acres to 248 <br /> acres. The estimated disturbed acreage by year, for the new mine <br /> plan is not substantially different from that contained in the <br /> originally permitted and bonded mine plan. The following table <br /> compares the estimated disturbed acreages for the revised and <br /> original mine plan. <br /> Revised Plan Original Plan <br /> Disturbed Disturbed <br /> Acreage Acreage <br /> Initial Disturbance 52 47 <br /> Month <br /> 1-12 21 30 <br /> 13-23 71 45 <br /> 24-36 65 61 <br /> 37-48 39 62 <br /> 49-60 0 15 <br /> Totals 248 260 <br /> Please call me 'if you have any questions. <br /> Sincerely, <br /> Jim Stover, P.E. <br /> Consulting Engineer <br /> Enclosure <br /> cc: Rick Ward <br />