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 -10
Sheet 1 of 1
Project: Proposed RPE Expansion
Location. West Elk Mine, Somerset,
Client- Mountain Coal Company
CO
Barr Project Number: 06/261003
STANDARD PENETRATION
NATURAL DRY
m
TEST DATA
DENSITY
_1D
c
\
N in blows /ft O
(pcf) it
o
t
MATERIAL DESCRIPTION
2
a
> 0
10 20 30 40
105 115 125
E
(ASTM D2488)
C
SHEAR
X
O
CL 8
STRENGTH, ksf
Water Content, %
W
E
N
Qp X UC A TV X
Wp Wry WL
U) vs
o vsR o
0
Surface Elev : 6177.1
1 2 3 4
20 40 60
SANDSTONE Grey /orange brown, very fine grained, dry
6175
20%
5
6170
66%
10
6165
54%
15
150
20
25
30
Completion Depth- 15.0
Remarks-
Date Boring Started. 6/27/09
Date Boring Completed: 6/27/09
SAMPLE TYPES
WATER LEVELS
Logged By: BWL
Auger Cutting ,Shelby Tube
While Drilling:
Drilling Contractor: Haztech
Drilling Method: CORE
Northing: 403361.4
® Split Spoon Rock Core
n
End of Drilling:
Eastin 1450227.8
hrs After Drilling:
fhe stratification lines represent approximate boundaries. The transition may be gradual