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 -7
Sheet 1 of 1
Protect: Proposed RIDE Expansion
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
\
N in blows/ft @
(pcf) �t
MATERIAL DESCRIPTION
U
a
> 0
10 20 30 40
105 115 125
a
(ASTM D2488)
a
Z
>
)
m
d o
SHEAR STRENGTH, ksf
Water Content, %
w
c7
E
V)
Op X UC A TV X
Wp W„ Wi
Surface Elev.: 6893.4
W
VS VSR O
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
12
6885
\
10
\
SILTY SAND (SM) Light tan - medium brown slightly moist silty 10.0
29
sand with dark bro moist sand at depth.
29
SA Ligh g m e d iu m_ gr a in e d s_an_d 11'0
_f
SANDSTONE Grey /brown fine - medium grained sandstone. 12.0
6880
----------------------- - - - - --
46
SANDSTONE Grey fine medium grained sandstone. 13.5
15
---------------------- - - - - 1 3
SANDSTO 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
25
X x
X x
25.0
30
Completion Depth: 25.0
Remarks:
Date Boring Started: 6/23/09
Date Boring Completed: 6123/09
Logged By. BSE
SAMPLE TYPES WATER LEVELS
Drilling Contractor: Haztech
While Drilling:
m Auger Cutting ,Shelby Tube
Drilling Method: HSA/CORE
Northing: 401415.5
End of Drilling:
®Split
n
Eastin : 1451292.6
Spoon Rock Core hrs After Drilling: DRY
0
go
the stratification lines represent apprommate boundaries. The transition may be gradual.