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HOURLY PRODUCTION <br />Hauling Capacity : <br />Scraper Payload (weight) Basis : <br />Material weight : 1,600 pounds/LCY <br />Material description : <br />Coal - Bituminous, Raw <br />Rated payload : 48,000 pounds <br />Payload capacity : 30.00 LCY <br />Scraper Bowl (volume) Basis : <br />Struck volume : 15.70 LCY <br />Heaped volume : 21.00 LCY <br />Average volume : 18.35 LCY <br />Adjusted capacity : 18,35 LCY ... <br />'** hourly production reflects volume per scraper pair on push-pull models <br />Cycle Time : Job Condition Corrections : Site altitude (ft.) : 7,500 <br /> Scraper Push dozer Source <br />Scraper loading time 0.40 minutes Altitude adj.: 1.000 1.000 (Cat HB) <br />Maneuver and spread time : 0.60 minutes Job efficiency : 0.830 0.830 (Cat HB) <br />" load time per scraper pair on push-pull models Net correction : 0.830 0.830 <br />Travel time : <br />Road condition description :Firm, smooth, rolling, dirt/It. surfaced, watered, maintained <br />Haul Route : <br />Seg. # Haul distance (feet) Grade (%) Roll. res. (%) Total res. (%) Velocity (fpm) Travel time (min.)"" <br />1 1,500 2.00 3.00 5.00 2218 0.81 <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />Return route : <br />Haul time : 0.81 minutes <br />travel time for each segment is adjusted for acceleration/deceleration. Return time : 0.62 <br />table velocities are max. attainable per total resistance shown, not average <br />Total scraper team cycle time (load + haul + maneuver and spread + return) : 2.42 <br />Unadjusted unit production/hour : 454.21 LCY/hour *"* Adjusted for job conditions : 376.99 <br />Optimal number of scrapers per push dozer : 3 Selected number of scrapers : 2 <br />Adjusted single scraper team (unit) hourly production : 753.99 <br />Adjusted multiple scraper team (fleet) hourly production : 753.99 <br /> <br />JOB TIME AND COST <br />Fleet size : 1 Team(s) Total job time : 7.47 <br />Unit cost : $0.839 /LCY Total job cost : $4,722 <br />sheet 2 of 2 <br />minutes <br />• <br />r? <br />U <br />minutes <br />LCY/hour <br />scraper(s) <br />LCY/hour <br />LCY/hour <br />Hours <br />RN-05 Exhibit 28-20 (Revised 2/16/09)