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<br />PROJECT -Topsoil Replacement <br />EQUIPMENT: 637 "D" P-P Scraper <br />ASSUMPTIONS: <br />Efficiency = 80% <br />Altitude Adjustment = 93.5% <br />RR = 6% <br />Topsoil will come from one or more topsoil stockpiles to be replaced on <br />the backfilled pit(s). Average depth of replacement equals approximately <br />2 feet. <br />Average haul distance one way = 1,000 feet <br />PRODUCTION = 500 cubic yards/hour (Cat Handbook, p. 218) <br />ACTUAL PRODUCTION = Ideal x Alt. Adj. x Eff. <br />=500x.935x.80 <br />= 374 cubic yards/hour <br />VOLUME/AREA: <br />Mine Area = 10,000 cubic yards (2 years of mining from field, <br />average of 5,000 cubic yards/year) <br />Haul Road Area = (2640'L x 30'W x 2'D) <br />27 cu, ft./cu. yd. <br />= 5,900 cubic yards <br />= 15,900 cubic yards (total both areas) <br />TIME = 15,900 cubic yards 1374 cubic yards/hour <br />= 42.5 hours <br />= 5.3 shifts <br />• COST= 5.3 shifts x $1,683.59 <br />_ $8,923.03 <br />L-9 <br />