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Colorado Division of Minerals and Geology <br /> ESTIMATING FORM - BULLDOZER RIPPING <br /> Task #: 71 Prep. by: SLB Task File Name: C017-71 <br /> Date: �,0 /94 Permit #: C-81-017 Mine: Coal Basin Mines <br /> i <br /> Permit Action: N/A <br /> Task Description: Rip Prep Plant Area <br /> HOURLY EQUIPMENT COST <br /> Basic Machine: Cat D8L Horsepower: 335 <br /> Blade Type: Semi-Universal <br /> Attachment #1: ROPS Cab Shift Basis: 1/day <br /> Attachment #2: 3-shank ripper ------ <br /> Cost/Hr Breakdown: Utilization % (code MO) <br /> ownership = $51.87 N/A <br /> operating/overhaul - dozer = $43.64 100 <br /> -ripper = $4.54 100 <br /> operator = $21.58 N/A <br /> Total eqpt. unit cost/hr = $121.62 Total fleet cost/hr: $121.62 <br /> MATERIAL QUANTITIES <br /> ====_____-=____= Selected method Area <br /> Seismic Load Bank <br /> method: N/A N/A Factor : N/A Volume N/A BCY <br /> Area --- -- <br /> method: 1.75 Acres Rip Depth: 2.50 Volume 7,058 BCY or CCY <br /> Source of quantity take-off: Division Estimate <br /> Source of mat. load factor: N/A <br /> HOURLY PRODUCTION <br /> Seismic Method Method - Seismic velocity of material: N/A feet/sec. <br /> ----- - Unadjusted hourly production: N/A BCY or CCY/hr <br /> Area Method - Avg. ripping depth per pass: 2.50 feet <br /> --- - Avg. ripping width per pass: 6.25 feet <br /> - Avg. ripping length per pass: 50.00 feet <br /> - Avg. velocity of machine 88.00 feet/min. <br /> - Avg. machine maneuver time : 0.25 minutes <br /> - Hourly prod. per unit area : 0.526 acres/hr <br /> - Unadjusted hourly production: 2,121.91 BCY or CCY/hr <br /> Correction Factors - Unadjusted production = 2,121.91 BCY or CCY/hr <br /> ----- - Site altitude = 8,100 feet <br /> - Altitude adjustment = 0.95 (Cat tbL) <br /> - Job efficiency factor = 0.83 0 sh/day) <br /> - Net correction = 0.79 multiplier <br /> - Adjusted production = 1673.13 BCY or CCY/hr <br /> - Fleet production = 1673.13 BCY or CCY/hr <br /> JOB COST <br /> Fleet Size : 1 Dozer(s) Total Job Time: 4.22 Hours <br /> Unit Cost : $0.073 /LCY Total Job Cost: $513.09 <br />