2010-04-26_PERMIT FILE - C1980007A ‎(6)‎

• Permit No: C1980007A
• IBM Index Class Name: Permit File
• Doc Date: 4/26/2010
• 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 -2
Sheet 1 of 2
Project: Proposed RPE E )pansion
Location: West Elk Mine, Somerset,
Client: Mountain Coal Company
CO
Barr Project Number: 06/261003
STANDARD PENETRATION
NATURAL DRY
d
TEST DATA
DENSITY
w
o
x
o
N in blows /ft @
(pcf) �c
MATERIAL DESCRIPTION
ii
> 0
10 20 30 40
105 115 125
o
n
(ASTM D2488)
o
Z
iu
(D
E
5?
a o
SHEAR STRENGTH, ksf
Water Content, %
w
O
E
0
Q X UC A TV )K
WP WN WL
Cn
vs o vsR O
Surface Elev.: 6332.6
1 2 3 4
20 40 60
0
COAL Black, dry coal fragments and dust.
6330
36
R 3
3
5
\
6325
50/
50/3
LEAN CLAY (CL) Medium grey /brown, slightly moist friable stiff 9.0
10
clay with coal fragments, silt and fine sand.
3
6320
50/
��
50/4
SILT (ML) Medium grey dry silt 14.0
15
4
6315
SANDSTONE Light brown with light grey mottling. Primarily fine 19.0
20
grained with minor medium grains. Minor coal in planes of
weakness.
84%
6310
25
100%
6305
:.
30
Continued Next Page
Completion Depth: 35.0
Remarks:
Date Boring Started: 6/18/09
Date Boring Completed: 6/18/09
Logged By. BSE
SAMPLE TYPES WATER LEVELS
Drilling Contractor: Haztech
While Drilling:
Auger Cutting 'Shelby Tube
Drilling Method: HSA/CORE
Northing: 402983.7
End of Drilling:
® Split Spoon Rock Core
Eastin : 1450669.3
hrs After Drilling: DRY
10
10
The stratification lines represent appropmate boundaries. The transition may be gradual.