2010-05-07_REVISION - C1996084

• Permit No: C1996084
• IBM Index Class Name: Revision
• Doc Date: 5/7/2010
• Doc Name: 2010 Midterm Review & Revised Reclamation Cost Estimate
• From: DRMS
• To: New Elk Coal Company
• Type & Sequence: MT3
• Email Name: KAG
• Email Name: DIH
• Media Type: D
• Archive: No

BOREHOLE SEALING WORK
Task #: 65
Mine: Lorencito Canyon Mine Date: 5/5/10
Permit no.: C1996-084 User: JHB
Cwt of bulk cement
2,500 gal Water
Octoplug
Cut surface
(assuming 94 Ibs of
Hole Total Hole Cement cost Total rig Rig wl crew
water truck truck w/
(Circes,
casing &
Hole diam. depth volume cement per 1.18 1 of Cement
per cwt Rig setup time Rig time to time hourly rate Total w/driver driver cost
$19.57
mark Total cost
hole, that is 100 Ibs total cost
(in) (ft) (cf) (CIRCES) per hole (hr) fill hole (setup + (Circes, Reed rig cost

"
hourly rate (rig fill
per in.
(Circes,
of cement fills 1.25 fill) drill, 9.0
)
(Circes) time x
diam.)
$10.90/lf)
? truck rate)
seal 30 monitoring wells and boreholes
Exhibit 7 & Table GW-8
MWLC-1 6 20 4 3.1 $7.80 $24 0.42 0.50 0.92 $216.07 $199 $61 $30 $117 $25 $396
MWLC-2 6 22 4 3.5 $7.80 $27 0.42 0.50 0.92 $216.07 $199 $61 $30 $117 $25 $399
MWLC-3 6 15 3 2.4 $7.80 $18 0.42 0.50 0.92 $216.07 $199 $61 $30 $117 $25 $390
MWLC-4 6 17 3 2.7 $7.80 $21 0.42 0.50 0.92 $216.07 $199 $61 $30 $117 $25 $392
MWJC-1 8 25 9 7.0 $7.80 $54 0.42 0.50 0.92 $216.07 $199 $61 $30 $157 $25 $465
MWPC-1 6 30 6 4.7 $7.80 $37 0.42 0.50 0.92 $216.07 $199 $61 $30 $117 $25 $408
MWBC-1 $216.07 $25
MWCC-1 6 28 5 4.4 $7.80 $34 0.42 0.50 0.92 $216.07 $199 $61 $30 $117 $25 $406
MWAC-1 6 20 4 3.1 $7.80 $24 0.42 0.50 0.92 $216.07 $199 $61 $30 $117 $25 $396
MWCWC-1 6 22 4 3 $7.80 $27 0.42 0.50 0.92 $216.07 $199 $61 $30 $117 $25 $399
MWCWC-2 6 35 7 5 $7.80 $43 0.42 0.50 0.92 $216.07 $199 $61 $30 $117 $25 $415
MW-1-0 4 376 33 26 $7.80 $205 1.31 0.33 1.64 $216.07 $355 $61 $20 $78 $25 $683
MW1A-C 4 394 34 28 $7.80 $215 1.33 0.34 1.67 $216.07 $361 $61 $21 $78 $25 $700
MW1-I 4 528 46 37 $7.80 $287 1.44 0.46 1.90 $216.07 $411 $61 $28 $78 $25 $829
MW2-C 4 67.5 6 5 $7.80 $37 0.67 0.50 1.17 $216.07 $253 $61 $30 $78 $25 $423
MW2-1 4 90.5 8 6 $7.80 $49 0.67 0.50 1.17 $216.07 $253 $61 $30 $78 $25 $436
MW2-0 4 59.5 5 4 $7.80 $32 0.67 0.50 1.17 $216.07 $253 $61 $30 $78 $25 $419
MW3-1 4 280.5 24 20 $7.80 $153 1.23 0.24 1.48 $216.07 $319 $61 $15 $78 $25 $590
MW4-C 4 369.5 32 26 $7.80 $201 1.31 0.32 1.63 $216.07 $352 $61 $20 $78 $25 $676
MW4-1 4 312.5 27 22 $7.80 $170 1.26 0.27 1.53 $216.07 $331 $61 $17 $78 $25 $621
MW4-U 4 408.5 36 29 $7.80 $222 1.34 0.36 1.70 $216.07 $367 $61 $22 $78 $25 $714
MW5-C 4 197.5 17 14 $7.80 $108 1.16 0.17 1.34 $216.07 $289 $61 $10 $78 $25 $510
MW5-1 4 177 15 12 $7.80 $96 1.15 0.15 1.30 $216.07 $281 $61 $9 $78 $25 $490
MW5-U 4 222.5 19 16 $7.80 $121 1.19 0.19 1.38 $216.07 $298 $61 $12 $78 $25 $534
MW6-C 4 250.5 22 17 $7.80 $136 1.21 0.22 1.43 $216.07 $308 $61 $13 $78 $25 $561
MW6-1 4 232.5 20 16 $7.80 $127 1.19 0.20 1.40 $216.07 $302 $61 $12 $78 $25 $544
MW6-U 4 265 23 18 $7.80 $144 1.22 0.23 1.45 $216.07 $314 $61 $14 $78 $25 $575
(27)
Total hours 32.56 Grand total $13,374
Divided by number of rigs 1
Net total hours 32.56