2008-08-06_REVISION - C1982057

• Permit No: C1982057
• IBM Index Class Name: REVISION
• Doc Date: 8/6/2008
• Doc Name: Midterm Review Reclamation Cost Estimate
• From: DRMS
• To: Seneca Coal Company
• Type & Sequence: MT5
• Email Name: DTM
• Media Type: D
• Archive: No

Jurfage Blasting Work cont'd Task # : 002 sheet 2 of 2
BLASTING MATERIALS QUANTITIES QUANTITY ! UNIT
Total quantity of stemming required 104.64 cubic yards
Total quantity of explosives required 19,312 p ounds
Total quantity of det_ cord/fuse/wire required 12,364 lin. feet -
Quantity of blasting caps used per blasthole
- )P(s)-.-
Total quantity of blasting caps required--- - --
i -- -tµ - 0- - caps -
--- --
Quantity of primers used per blasthole f primer(s)
Total quanti
ty of primers required
-_- _.-- -- --- -------•_.----

J
Q
-
_-
primers
-
Quantity of delays used per blasthole - - - - _
_-.
--- -_
1 delay(s)
Total quantity of delays required 0 delays

HOURLY EQUIPMENT COST Shift basis : -1 per day Data source : (CRG data)

Drilling equipment - Drill
_ - Drill pad preparation
Misc- drilling support equipment
Misc. explosives support equipment
Explosives delivery/prep. - Bulk truck
- CaD truck
TLAS COPCO DML/SP, 9-718 in.
Cost Breakdown : I Drilling Drill Pad
Equipment Preparation Misc. Drill
Support Misc. Expl.
Support Explosives Delivery
Bulk Truck Cap Truck
Import data filename : drilling j NA NA NA NA ! NA
Utilization -mac hine+att. no. 1 :
dripper or attachment no. 2 : 100
100 µ NA
NA NA
NA NA
NA I NA
NA NA
NA
Equipment ownership $/hr : $121.76 NA NA NA NA NA
Machine+att. 1 operating $/hr : $172.16 NA I NA NA NA NA
Ripper or aft. 2 operating $/hr : $147 NA NA NA NA NA
Operator+additional labor $/hr :
Unit subtotals : $51.99
$349.37 s NA
$0.00 NA
$0.00 NA
$0.00 NA
$0.00 NA
$0.00
Number of units 0 0 0 O 0
Group subtotals : $349.37 WOO $0.00 $0.00 $0.00 $0.00
Total work team cost/hour : $349.37
MATERIALS COST
4 Description I Unit Unit Cost Quantity Total Cost
Blasting agent : ulk ANFO nom. density pound $0.191 19 311,60 $3,688.52
Primers or boosters : iCast primer, 0.31b - j each $2.289 0.00 $0 00
Blasting caps : Non-electric cap, inst. each $3.056 j 0.00 I $0.00

Det. cord, fuse or wire : r- - - - - -.-
Vetonating cord, 10 grlR. __
linear foot $0.094 _.
12 364,44
$1
162
26
Decays :I hlS connectors each $3.894 ! 0.00 ,
,
i $0.00
Miscellaneous ,` Stemming 1 5 in. gravei cu. yd $30.00
--- 215.25 $6,45T56

_.___._..._ Drill bits
bit life 1;1150.0 -
linearfeet $2,586.00 ; .... .-
3-43 { --
$8,860.97
• bit life unit = linear root, bit ;.oat unit = each (per trt) Total materials cost : $20,169.30
DRILLING AND EXPLOSIVES PREPARATION TIME
Job Condition Correction Factors - Site altitude : 8,000 feet
Altitude adjustment : 0.90 (DMG est.)
Total drilling length : 5,996 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 : 121.27 hours Explosives prep, time : 5.00 hours
J08 TIME AND COST Total job time 126.27 hours
Total unit cost : ($0.849) per cu. yd. Total job cost $62,538