2011-06-15_REVISION - P2010007

• Permit No: P2010007
• IBM Index Class Name: REVISION
• Doc Date: 6/15/2011
• Doc Name: Approval letter for MD-03
• From: DRMS
• To: Rio Grande Silver, Inc.
• Type & Sequence: MD3
• Email Name: RCO
• Media Type: D
• Archive: No

PROJECT IDENTIFICATION
Task # :
Date :
User:
002
06/03/2011
RCO
Agency or organization name :DRMS
Permit or other job action :Modification MD -3
HOURLY EQUIPMENT COST
Cost Breakdown :
MATERIAL QUANTITIES
Initial
volume :
267
HOURLY PRODUCTION
Material consistency description :
Consolidated stockpile
CCY
Average push distance : 50 feet
Unadjusted hourly production : 464.3 LCY /hr
Average push gradient : 0.00 % (pos)
Average site altitude : 11,600 feet
Material weight : 2,900 Ibs /LCY
Weight description :
Decomposed rock - 50% Rock, 50% Earth
JOB TIME AND COST
Fleet size :
Unit cost :
CIRCES Cost Estimating Software
BULLDOZER WORK
State : Colorado
County :Mineral
Site :North Amethyst Project
Task description :Backfill pad sumps (3 per pad, on 4 pads)
Basic machine : Cat D5G LGP - 5P
Blade type :Power Angle Tilt
Attachment no. 1 :ROPS Cab
Attachment no. 2 :3-shank ripper
Ownership cost/hour :
Operating cost/hour :
Ripper op. cost/hour :
Operator cost/hour :
Total unit cost/hour :
1 Dozer(s)
$0.458 /LCY
Swell
factor:
1.165
Source of estimated volume :10x10x6 ft sump x 12 sumps total
Source of estimated swell factor :na
Permit/job# : P -2010 -007
Abbreviation :none
Filename : P007 -002
Utilization %
$17.95 NA
$24.13 100
$0.00 0
$38.54 NA
$80.62
Loose
volume : 311
Job Condition Correction Factors
Operator skill :
Material consistency :
Dozing method :
Visibility :
Job efficiency :
Spoil pile :
Push gradient :
Altitude :
Material weight :
Blade type :
Net correction :
Total job time :
Total job cost : $142
Horsepower: 90
Shift basis : 1 per day
Data source : (CRG)
Total fleet cost/hour : $80.62
1.77
LCY
Source
0.75 (avg.)
1.00 (Cat HB)
1.00 (gen.)
1.00 (avg.)
0.83 (lshift/day)
0.80 (fnd -rf)
1.00 (Cat HB)
0.96 (Cat HB)
0.79 (Cat HB)
1.00 (PAT)
0.38
Adjusted unit production : 175.98 LCY /hr
Adjusted fleet production : 175.98 LCY /hr
Hours