2009-10-01_REVISION - C1996083

• Permit No: C1996083
• IBM Index Class Name: REVISION
• Doc Date: 10/1/2009
• Doc Name: 2009 Midterm Reclamation Cost Estimate
• From: Jim Stark
• To: Joe Dudash
• Type & Sequence: MT3
• Email Name: JJD
• Media Type: D
• Archive: No

HOURLY PRODUCTION
Hauling Capacity :
Scraper Payload (weight) Basis :
sheet 2 of 2
Scraper Bowl (volume) Basis :
Material weight : 2,900 pounds/LCY Struck volume : 15.70 LCY
Material description : Heaped volume : 21.00 LCY
Decomposed rock - 50% Rock, 50% Earth Average volume : 18.35 LCY
Rated payload : 48,000 pounds Adjusted capacity : 16.55 LCY ***
Payload capacity: 16.55 LCY hourly production reflects volume per scraper pair on push-pull models
Cycle Time :
Scraper loading time * : 0.90 minutes
Maneuver and spread time : 0.60 minutes
* load time per scraper pair on push-pull models
Travel time :
Road condition description :Firm, smooth, rolling
Job Condition Corrections : Site altitude (ft.) : 6, 750
Scraper Push dozer Source
Altitude adj.: 1.000 NA (Cat HB)
Job efficiency : 0.830 NA (Cat HB)
Net correction : 0.830 NA
dirt/It. surfaced, watered, maintained
Seg. # Haul distance (feet) Grade (%) Roll. res. (%) Total res. (%) Velocity (fpm) Travel time (min.)**
1 800 0.00 3.00 3.00 2824 0.52

Haul time : 0.52 minutes
__F874 0.40
t S
" travel time for each segment is adjusted for acceleration/deceleration. Keturn time : v.vv minu e

table velocities are max. attainable per total resistance shown, not average
Total scraper team cycle time (load + haul + maneuver and spread + return) : 2.43 minutes
Unadjusted unit production/hour : 819.02 LCY/hour *** Adjusted for job conditions : 679.79 LCY/hour
Optimal number of scrapers per push dozer : NA Selected number of scrapers : 2 scraper(s)
Adjusted single scraper team (unit) hourly production : 679.79 LCY/hour
Adjusted multiple scraper team (fleet) hourly production : 679.79 LCY/hour
JOB TIME AND COST
Fleet size : 1 Team(s)
Unit cost : $0.773 /LCY
Total job time : 90.83 Hours
Total job cost : $47,746