2009-06-02_REVISION - C1981008

• Permit No: C1981008
• IBM Index Class Name: REVISION
• Doc Date: 6/2/2009
• Doc Name: Revised Cost Estimate
• From: Susan Burgmaier
• To: Marcia Talvitie
• Type & Sequence: RN5
• Email Name: MLT
• Media Type: D
• Archive: No

HOURLY PRODUCTION
Hauling Capacity :
Scraper Payload (weight)
o4S
sheet 2 of 2
Basis :
Material weight : 2,650 pounds/LCY
Material description :
Decomposed rock - 25% Rock, 75% Earth
Rated payload : 75,000 pounds
Payload capacity : 28.30 LCY
>craper Bowl (volume) Basis :
Struck volume : 24.00 LCY
Heaped volume : 34.00 LCY
Average volume : 29.00 LCY
Adjusted capacity : 28.30 LCY ***
hourly production reflects volume per scraper pair on push-pull models
Cycle Time : Job Condition Corrections : Site altitude (ft.) : 5,700
Scraper Push dozer Source
Scraper loading time 0.60 minutes Altitude adj.: 1.000 1.000 (Cat HB)
Maneuver and spread time : 0.70 minutes Job efficiency : 0.830 0.830 (Cat HB)
* load time per scraper pair on push-pull models Net correction : 0.830 0.830
Travel time :
Road condition description :Firm, smooth, rolling, dirtllt. surfaced, watered, maintained
Haul Route :
Seg. # Haul distance (feet) Grade (%) Roll. res. (%) Total res. (%) Velocity (fpm) Travel time (min.)**
1 3,350 3.00 3.00 6.00 1069 3.20

Haul time : 3.20 minutes
Return route :
** travel time for each segment is adjusted for acceleration/deceleration. Return time :
table velocities are max. attainable per total resistance shown, not average
Total scraper team cycle time (load + haul + maneuver and spread + return)
Unadjusted unit production/hour : 293.88 LCY/hour *** Adjusted for job conditions
Optimal number of scrapers per push dozer : 5 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)
Unit cost : $1.121 /LCY
1.28 minutes
5,78 minutes
243.92 LCY/hour
4 scraper(s)
975.69 LCY/hour
975.69 LCY/hour
Total job time : 6.44 Hours
Total job cost : $7,041