2011-09-30_PERMIT FILE - C1980007A ‎(6)‎

• Permit No: C1980007A
• IBM Index Class Name: Permit File
• Doc Date: 9/30/2011
• Doc Name: Boring Logs
• Section_Exhibit Name: Exhibit 82 Appendix A
• Media Type: D
• Archive: Yes

Barr Engineering Company
4700 West 77th Street
BARR Minneapolis, MN 55435 -4803 LOG OF BORING B -3
Sheet 2 of 4
Project: Proposed RPE Expansion
Location. West Elk Mine, Somerset,
Client: Mountain Coal Company
CO
Barr Project Number: 06/261003
STANDARD PENETRATION
NATURAL DRY
TEST DATA
DENSITY
N in blows /ft @
(pcf) is
o
z
MATERIAL DESCRIPTION
a
> 0
10 20 30 40
105 115 125
M
�
(ASTM D2488)
F
4)
0
o
SHEAR STRENGTH, ksff
Water Content, %
Ej
O
E
v)
Qp X UC L TV X
WP WN WL
U)
VS L VSR O
1 2 3 4
20 40 60
30
SILTSTONE Light grey /grey siltstone with fine sand inclusions.
X X
50/
50/3
X X
x x
3
6335
x X
X x
X x
X X
X x
35
x x
X X
X x
X X
x x
>>q,50/4
X X
50/
X x
4
6330—_
X X
X x
X x
X x
X x
X x
50/
>>('00/11
SANDSTONE Grey sandstone with minor coal dust. Minor 39.0
40
layers of siltstone. Some clay infilling. Minor pyrite present in
small dykes.
6325
; ;
94%
45
6320—_
37.5%
50
6315 —
37.5%
55
100%
6310
93%
60
Continued Next Page
Completion Depth: 100.0
Remarks:
Date Boring Started: 6/18/09
Date Boring Completed: 6/19/09
SAMPLE TYPES
WATER LEVELS
Logged By: BSE
m Auger Cutting 'Shelby Tube
While Drilling:
Drilling Contractor: Haztech
Drilling Method: HSA/CORE
End of Drilling
Northing- 402650.2
n
Eastin - 1450672.6
® Split Spoon Rock Core
hrs After Drilling: 75.28
The stratification lines represent appropmate boundaries. The transition may be gradual.