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Mine Area Yoast • <br />Project Facilities-Perm Roads <br />Task Narrow Roads <br />WORKSHEET N0. PR-2 <br />PRODUCTIVITY FOR DOZER USE - RIPPING <br />Dozer Activity: Push 34 ft. 8 12 ft. of gravel/scoria surfacing back onto road surface. This <br />leaves the road 20' wide with approximately an additional foot of surfacing material. A compactor will <br />compact this material and a motor grader will shape it. <br />Dozer Used: D-11N, SU blade, 14G Motor Grader <br />Description of Dazing: 80' push <br />Volume: 1' x 34' x 6,000 = 7,600 cy <br />1' x 12' x 6,000 = 7,100 cy <br />14,700 cy <br />Productivity Calculations: <br />Operating: 78 <br />Grade: see EMF <br />Material Fac[or: see EMF <br />Push Distance: see EMF <br />Dozing Factor: see EMF <br />Visibility: 90 <br />Altitude: 91 <br />Dual Tilt: 105 <br />Spoil Pile Factor: see EMF <br />Minutes worked per Hour: 50 <br />Bank Material Density: see EMF <br />Loose Material Density: see EMF <br />Direct Drive Trans: 100 <br />Total Adj. Factor: 0.3349 <br />Net Hourly Production = 2.803 yd3/hr K 0.3349 = _631 _ yd_/hr <br />normal hrly prod. op. adj. factor <br />Hours Required = ( 10.375 yd_ / 631 yd_/hr) x = 30 hrs <br />volume to be moved net hrly. prod. <br />Cost per Hour = f236.22 (D11-N) <br />83.31 (14G) <br />D.60/cy for compactor <br />Total Cost = 30 hrs. x f236.22 cost/hr S 7,087 <br />30 hrs. x f 83.31 cost/hr = 2,500 <br />5.060/cy x 14,700 cy ~ 8,820 <br />S'i8,407 <br />REFERENCES: <br />Table 25-2-b <br />Attachment 25-2 <br />• <br />• <br />25-4-8 <br />