2010-05-07_REVISION - C1982057

• Permit No: C1982057
• IBM Index Class Name: REVISION
• Doc Date: 5/7/2010
• Doc Name: Proposed Decision & Findings of Compliance for SL2
• From: DRMS
• To: Seneca Coal Company
• Type & Sequence: SL2
• Email Name: DTM
• Email Name: SB1
• Media Type: D
• Archive: No

Surface Blasting Work cont'd Task #: 002 sheet 2 of 2
BLASTING MATERIALS QUANTITIES QUANTITY UNIT
Total quantity of stemming required 36.71 cubic yards
Total quantity of explosives required 5,546 pounds
Total quantity of det. cord/fuse/wire required 5,613 lin. feet
Quantity of blasting caps used per blasthole 1 cap(s_)_
Total quantity of blasting caps required 124 caps _
Quantity of primers used per blasthole 1 rimer(s) _
Total quantity of primers required 124 rimers
Quantity of delays used per blasthole 1 delay(s) _
Total quantity of delays required 125 delays
HOURLY EQUIPMENT COST Shift basis : 1 per day Data source : (CRG data)
Drilling equipment- Drill :I REEDRILL SK35, 9.0 in.
- Drill pad preparation : NA
Misc. drilling support equipment : NA
Misc. explosives support equipment: NA
Explosives delivery/prep. - Bulk truck :NA
- Cap truck : NA
Cost Breakdown : Drilling
Equipment Drill Pad
Preparation Misc. Drill Misc. Expl.
Support Support Explosives
Bulk Truck Delivery
Cap Truck
Import data filename : drilling NA NA NA NA NA
Utilization -machine+att. no. 1 : 100 NA NA NA NA NA _
-ripper or attachment no. 2 : 100 NA NA NA NA NA
Equipment ownership $/hr : $57.96 NA NA NA NA NA _
Machine+att. 1 operating $/hr : $120.95 NA NA NA NA NA _
Ripper or att. 2 operating $/hr : $4.80 NA NA NA NA NA _
Operator+additional labor $/hr : $44.84 NA NA NA NA NA _
Unit subtotals : $228.54 $0.00 $0.00 $0.00 $0.00 $0.00
Number of units : 1 0 0 0 0 0
Group subtotals : $228.54 $0.00 $0.00 $0.00 $0.00 $0.00
Total work team cost/hour : WZZ5.04
MATERIALS COST
Description Unit Unit Cost Quantity Total Cost
Blasting agent: Bulk ANFO nom. density pound $0.221 5,545.56 $1,225.57
Primers or boosters : Cast primer, 0.3 lb each $2.728 124.00 $338.27
Blasting caps: Non-electric cap, inst. each $3.647 124.00 $45_2.23
Det. cord, fuse or wire : Detonating cord, 10 g0ft. linear foot $0.112 5,613.30 $628.6_9 _
Delays : MS connectors each $4.648 125.00 $581.00
Miscellaneous : Stemming, 1.5 in. gravel cu. yd. $29.06 31.97 _$929.10_
Drill bits * : bit life = 1,750.0 linear feet $2,279.00 1.42 $3,229.67
bit life unit = linear foot, bit cost unit = each (per bit) Total materials cost : 6z,3two3

DRILLING AND EXPLOSIVES PREPARATION TIME
Job Condition Correction Factors - Site altitude : 8,000 feet
Altitude adjustment : 0.90 (DMG est.)
Total drilling length : 2,480 linear feet Job efficiency factor : 0.67 (Ch. Exc. HB)
Unadjusted drilling rate : 82.00 feet/hour Adjusted drilling rate : 49.45 feet/hour
Drilling time : 50.16 hours Explosives prep. time : 22.77 hours

JOB TIME AND COST Total job time : 72.93 hours
Total unit cost : $1.954 per cu. yd. Total job cost : $18,847