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. '. , M <br /> <br />ichard A. Mills <br />8, 1980 <br />Page 4 <br />Permitted Acreage <br />Disturbance Category <br />Minimum <br />Maximum <br />Major <br />Moderate <br />Minor <br />100 <br />95 <br />105 <br />110 <br />105 <br />202 <br />As of December 31, 1980, we have surveyed the following disturbance <br />categories: <br />Category Acreage <br />Major 91 <br />Moderate 44 <br />Minor 161 <br />And as of April 1, 1981, with all the highwall backfilled, except- <br />ing for the Middle Creek Mine, we estimate the following disturb- <br />ance situations for Pit 3: <br />Category Acreage <br />Major 42 (associated with Middle Creek) <br />Moderate 54 <br />Minor 200 <br />We suggest that calculations for bonding purposes be worked out <br />jointly with your office at an appropriate time. <br />Sincerely, <br />WRB/lar <br />cc: GWGrandey <br />MMcCarthy <br />JLarson <br />JAdams <br />E/NERG~Y FULi/~EI,.S~' PO <br />C~ ~ <br />W. Richard Brown <br />Manager - Engineering <br />and Reclamation <br />,y <br />