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 -7
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
TEST DATA
DENSITY
w
m
N in blows /ft O
(pcf)
MATERIAL DESCRIPTION
U
a
> 0
10 20 30 40
105 115 125
o
(ASTM D2488)
@
Z LL
0
?�
d o
SHEAR STRENGTH, ksf
Water Content, %
w
O
a
E
rn
OP X UC D TV jIE
Wa WN WL
M )
VS 0 VSR O
Surface Elev.: 6893.4
1 2 3 4
20 40 60
0
CLAY (CL -CH) Medium brown slightly moist clay with silt, sand
and gravel. Trace roots.
6890
5
012
�'N
12
6885
10
\
SILTY SAND (SM) Light tan - medium brown slightly moist silty 10.0
29
sand with dark brown moist sand at depth.
29
SANDSTONE Light grey fine - medium grained sandstone. 11'0
: :
SANDSTONE Grey /brown fine - medium grained sandstone. 12.0
6880
----------------------- - - - - --
....
46%
. .
SANDSTONE Grey fine- medium grained sandstone. 13.5
SANDSTONE Tan -grey sandstone. 15.0
....
100%
6875
20
-------- ------ --- ----------- -:::::
SANDSTONE Tan sandstone. Trace coal dust. 20.0
•
69%
6870
SILTSTONE Tan -dark brown siltstone. Minor coal in seams. 23.0
x
x x
X x
25
X x
X x
25.0
30
Completion Depth 25.0
Remarks:
Date Boring Started 6/23/09
Date Boring Completed: 6/23/09
SAMPLE TYPES
WATER LEVELS
Logged By BSE
m Auger Cutting ,Shelby Tube
While Drilling:
Drilling Contractor: Haztech
Drilling Method: HSA/CORE
Northing: 401415.5
®Split Spoon a Rock Core
End of Drilling:
Eastin : 1451292.6
hrs After Drilling: DRY
I ne stratitication tines represent appro)amate boundanes. I he transition may be gradual.