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reclamation. The Whirlwind reclamation, however, will have no less than 12 inches of topsoil <br />• replacement. <br />The estimated subtotal for backfilling and grading at Packrat is $3,200 + $2,800 = $5,000. <br />Therefore, the total cost for backfilling and grading both portal azeas and the waste embankment is <br />estimated to be $8,984. <br />11. Use MSHA Berm to Re-topsoil Packrat Portal Area <br />All previous substitute topsoil used to reclaim the Packrat Portal area was stripped and placed along <br />the perimeter of the Packrat Pad and Road to create the 3-foot high safety berm required by MSHA. <br />During reclamation, this material will be removed and replaced on the pocked surface of the Packrat <br />Portal azea of approximately 0.99 acre. This material was previously calculated as having a volume of <br />6'72 cubic yazds, assuming a soil depth of 5 inches. It will be placed cazefirlly into the pockmazks at a <br />• unit cost of $3.50 per cubic yazd. This represents an estimated total wst of $2,352. <br />N'hirlwindMine June 07 E-12 <br />