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PRODUCTIVITY ASSUMPTIONS <br /> Productivity Assumptions for Grading <br /> Caterpillar D9L Crawler Dozer with Universal Blade <br /> Grading to occur as integral part of truck backfilling <br /> Average Dozing Distance = 50 feet <br /> Uncorrected Productions(1 ) = 2,100 cu yd/hr <br /> Applicable Correction Factors: <br /> Average Operator = 0. 75 <br /> Loose, Fractured Material = 1. 10 <br /> Slot Dozing = 1. 10 (half-time) <br /> Job Efficiency = 0.84 <br /> Grade Correction = 1.00 <br /> Production = (2,100) x (0.75) x (1. 10) x (1. 10) x (0.84) x (1.00) _ <br /> 1 ,600 cu yd/hr <br /> Productivity: <br /> Assumes final grading moves material approximate v 0 5 feet thic <br /> (0.5 feet) x (43,560 ft2/acre) x (1 cu yd/27 ft3) = 807 cu yd/acre <br /> 807 cu yd/acre = 0.5 hr/acre <br /> 1600 LCY/hr <br /> Productivity Assumptions for Scarifying the Graded Surface <br /> Use Caterpillar 14G Motor Grader with Scarifier Ripper <br /> Approximate Spacing on Scarifier Ripper = 3 feet Penetration = 1.5 feet <br /> Caterpillar 14G Motor Grader makes 12 foot pass at 4 mph on regraded <br /> surface to achieve 3 foot centers <br /> (1) Production estimated from Caterpillar Performance Handbook, <br /> Edition 14, page 42 <br /> -4- <br />