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) Basis :
Material weight : 2,100 pounds/LCY
Material description
Earth - Loam
Rated payload : 75,000 pounds
Payload capacity : 35.71 LCY
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, dirt/It. surfaced, watered, maintained
Haul Route :
Seg. # Haul distance (feet) Grade (%) Roll. res. (%) Total res. (%) Velocity (fpm) Travel time (min.)**
1 1,200 1.25 3.00 4.25 1667 0.87

Return route :
Scraper Bowl (volume) Basis :
sheet 2 of 2
Struck volume : 24.00 LCY
Heaped volume : 34.00 LCY
Average volume : 29.00 LCY
Adjusted capacity : 29.00 LCY ***
hourly production reflects volume per scraper pair on push-pull models
Haul time : 0.87 minutes
** travel time for each segment is adjusted for acceleration/deceleration. Return time : 0.59 minutes
table velocities are max. attainable per total resistance shown, not average
Total scraper team cycle time (load + haul + maneuver and spread + return) : 2.76 minutes
Unadjusted unit production/hour : 630.69 LCY/hour *** Adjusted for job conditions : 523.47 LCY/hour
Optimal number of scrapers per push dozer : 2 Selected number of scrapers : 2 scraper(s)
Adjusted single scraper team (unit) hourly production : 1,046.94 LCY/hour
Adjusted multiple scraper team (fleet) hourly production : 2,093.88 LCY/hour
JOB TIME AND COST
Fleet size
Unit cost
2 Team(s) Total job time : 41.84 Hours
$0.613 /LCY Total job cost
$53,690