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RUG-13-97 04:24 PM GREYSTONE 13037219298 <br />• • <br /> <br />August 5, 1995 <br />Lorencito Coal Company <br />page 2 of 2 <br />Task >Y 8 <br />Task Description: Revegetate surface mine area with grassland seed mixture totaling 545.17 <br />acres. <br />The correct acreage for this calculation is equal to 226.1 acres. Tn a worst case bond <br />calculation you assume that boxcut 2000 (72.5 acres), boxcut 2001 (92.3 acres), boxcut 2002 <br />(49.8 acres), and topsoil stockpile (12.3 acres) would require revegetation and reseeding <br />reclamation activities. The disturbance acreage would be calculated as explained in Task M <br />6, <br />Task +'/ 87 and /t 87a <br />Task Description: Haul O.B. from fill b2 to boxcut. <br />This task has an error in the job condition correction factors for both Task q 87 and g87a. <br />The dozing method factor should be calculated as a side by side method with a correction <br />value of 1,1 versus the 1.0 used in the CDMG calculation. The net job correction for dozing <br />method would have a value of 0.69. The recalculation for Task p 87 and l1 87a totals <br />$701,318,62 and $417,682,10, respectively. <br />Task ~ BS <br />Task Description: Push 1,014,518 CY O.B. from fill rY3 to boxcut. <br />The average push distance was calculated as 550 feet when the correct value for the average <br />push distance is 275 feet. The unadjusted hourly dozer production fora 275 foot push <br />distance is equal to 1000 ley/hr. The subsequent adjusted unit production would be equal to <br />690 ley/hr versus the 374.02 Icy/hr calculated by the CDMG. The total job cost for this task <br />recalculation is equal [o $525,798.77. <br />Our Tables currently document the Division's costs in the individual Task Cost column, end <br />~ in the Sub-Total column. Our recommended modifications are highlighted in the Revised <br />Cost column and are totaled at the bottom of each page. Please review the revisions and call <br />if you have any questions. <br />Sincerely, <br />~~ I ~- <br />Cathy Begej C~~' / <br />Assistant Project Manager <br />P. 02 <br />Attachments <br />