Laserfiche WebLink
1. Assumption <br />• Reclamation Required for each year was calculated assuming that the mine <br />ceased to operate at the end of each year during the permit term (i.e., 6 months <br />behind in reclamation work). <br />2. Dlethod <br />• Reclamation needs were determined from maps when applicable. <br />• Removal of Facilities was estimated on a structural basis. <br />• Pond grading is included in Facility grading. <br />B. CALCULATIONS BY RECLAMATION CATEGORY <br />This section is divided by reclamation category, each division entailing three parts: <br />Site Specific Details Unit Cost Cost by Year <br />1. FINAL PIT GRADING <br />Site Suecific Details <br />• Depth of final pits averages 60 feet with an average width of 100 feet at coal elevation. <br />• Final pit requires an average 300 foot push with a D-9-L dozer with a U-blade. <br />• Backfill Volume = 200 yd3 of material/foot of pit length. <br />Unit Cost <br />a. Production Rate <br />Ideal production = 580 yds3/hr. <br />Production Factor <br />operator ..... ...... .75 <br />material .... .......80 <br />job efficiency .......83 <br />altitude ..... ...... .:~; <br />total ........ .... 0.45 8 <br />Adjusted Production =Ideal Production x Production Factor <br />= 580 yds3/hr x 0.458 <br />= 266 yds3/hr. <br />Actual Production Rate =Volume Moved/Area + Adjusted Production Rate <br />= 200 yds3 of material/foot of pit length + 266 yds3/hr <br />= 0.75 hrs/foot of pit length. <br />b. Hourly Equipment/Labor Costs <br />4 <br />December 12, 1991 <br />