2009-01-26_REVISION - C1981012 ‎(2)‎

• Permit No: C1981012
• IBM Index Class Name: REVISION
• Doc Date: 1/26/2009
• Doc Name: Cost Estimate ‎(Memo)‎
• From: Jim Stark
• To: Kent Gorham
• Type & Sequence: RN5
• Email Name: KAG
• Media Type: D
• Archive: No

HOURLY PRODUCTION
Hauling Capacity :
Scraper Payload (weight) Basis :
Material weight :
Material description :
Coal - Bituminous, Raw
1.600 pounds/LCY
Rated payload : 48,000 pounds
Payload capacity : 30.00 LCY
sheet 2 of 2
Scraper Bowl (volume) Basis :
Struck volume : 15.70 LCY
Heaped volume : 21.00 LCY
Average volume : 18.35 LCY
Adjusted capacity : 18.35 LCY ***
hourly production reflects volume per scraper pair on push-pull models
Cycle Time : Job Condition Corrections : Site altitude (ft.) : 7,500
Scraper Push dozer Source
Scraper loading time 0.40 minutes Altitude adj.: 1.000 1.000 (Cat HB)
Maneuver and spread time : 0.60 minutes Job efficiency : 0.830 0.830 (Cat HS)
* load time per scraper pair on push-pull models Net correction : 0.830 0.830
Travel time :
Road condition description :Firm, smooth, rolling, dir0t. surfaced, watered, maintained
Haul Route :
Seg. # Haul distance (feet) Grade (%) Roll. res. (%) Total res. (%) Velocity (fpm) Travel time (min.)**
1 1,500 2.00 3.00 5.00 2218 0.81

Return route :
Haul time : 0.81 minutes
minutes
Total scraper team cycle time (load + haul + maneuver and spread + return)
Unadjusted unit production/hour : 454.21 LCY/hour *** Adjusted for job conditions
Optimal number of scrapers per push dozer : 3 Selected number of scrapers
Adjusted single scraper team (unit) hourly production
Adjusted multiple scraper team (fleet) hourly production
JOB TIME AND COST
Fleet size : 1 Team(s) Total job time
Unit cost : $0.839 /LCY Total job cost :
2.42 minutes
376.99 LCY/hour
2 scraper(s)
753.99 LCY/hour
753.99 LCY/hour
7,47 Hours
$4,722
** travel time for each segment is adjusted for acceleration/deceleration. Return time : 0.62
table velocities are max. attainable per total resistance shown, not average