2011-10-17_REVISION - M1977215

• Permit No: M1977215
• IBM Index Class Name: REVISION
• Doc Date: 10/17/2011
• Doc Name: TR-18 approval
• From: DRMS
• To: Rio Grande Silver, Inc.
• Type & Sequence: TR18
• Email Name: RCO
• Media Type: D
• Archive: No

PROJECT IDENTIFICATION
Task # : 005
Date : 10/17/2011
User : RCO
Agency or organization name :DRMS
Permit or other job action :9400 portal, TR -18
Task description : Grade and recontour portal, shaft and facilities areas
HOURLY EQUIPMENT COST
Cost Breakdown :
MATERIAL QUANTITIES
Initial
volume : 9,000
Source of estimated swell factor :na
HOURLY PRODUCTION
Source of estimated volume : 2.8 acres x 2 ft avg depth
Average push distance : 150 feet
Unadjusted hourly production : 910.5 LCY /hr
Material consistency description :
Consolidated stockpile
CCY
State : Colorado
County :Mineral
Site : Bulldog Mine
Ownership cost/hour :
Operating cost/hour :
Ripper op. cost/hour :
Operator cost/hour :
Total unit cost/hour :
Average push gradient : 5.00 % (neg)
Average site altitude : 9,400 feet
Material weight : 3,300 Ibs /LCY
Weight description :
Decomposed rock - 75% Rock, 25% Earth
JOB TIME AND COST
Fleet size :
Unit cost :
CIRCES Cost Estimating Software
BULLDOZER WORK
1 Dozer(s)
$0.691 /LCY
Swell
factor :
Permit/job# :M- 1977 -215
Abbreviation :none
Filename :M215 -005
Basic machine : Cat D9R - 9SU (2005) Horsepower 405
Blade type : Semi- Universal
Attachment no. 1 :ROPS Cab
Attachment no. 2 :3-shank ripper
Utilization %
$67.77 NA
$95.29 100
$0.68 10
$38.54 NA
$202.28
Total job cost : $7,552
Shift basis : 1 per day
Data source : (CRG)
Total fleet cost/hour : $202.28
Loose
1.215 volume : 10,935 LCY
Job Condition Correction Factors Source
Operator skill : 0.75 (avg.)
Material consistency : 1.00 (Cat HB)
Dozing method : 1.00 (gen.)
Visibility : 1.00 (avg.)
Job efficiency : 0.83 (1shift/day)
Spoil pile : 0.70 (fnd -mf)
Push gradient : 1.11 (Cat HB)
Altitude : 0.95 (Cat HB)
Material weight : 0.70 (Cat HB)
Blade type : 1.00 (S /SU /U)
Net correction : 0.32
Adjusted unit production : 292.91 LCY /hr
Adjusted fleet production : 292.91 LCY /hr
Total job time : 37.33 Hours