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 -8
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
v
TEST DATA
DENSITY
w
a�
v�
0
.6
N in blows /ft @
(pcf)
o
MATERIAL DESCRIPTION
Z
10 zo 30 ao
105 115 125
76
(ASTM D2488)
r a
C
F
0
SHEAR STRENGTH, ksf
Water Content, %
w
O
E
u)
0, X UC o TV X
WP WN WL
in
VS o VSR O
Surface Elev.. 6779.3
1 1
1 2 3 4
20 40 60
0
CLAY (CL -CH) Medium brown slightly moist clay with silt, sand
and gravel and rock fragments.
6775
5
13
0.3
♦
♦
6770
_10-
50/
SILTSTONE Light grey dry very fine grey siltstone. 10.0
X X
x x
x x
1
>>q,50/1
x x
x x
x x
/
/
x x
x x
/
/
x x
x x
/
/
6765
x x
x x
15
/
CLAY (CL -CH) Medium brown wet clay with silt, sand and gravel 15.0
and roots.
6
°
6760
-20-
SILTSTONE Medium brown /grey 20.0
X X
x x
46
x x
x x
x x
x x
x x
\
6755
x x
X x
x x
X X
25
x x
X x 50/
>>
50/4
x x
X x
4
x x
SANDSTONE Light - medium grey sandstone interbedded with 27.0
siltstone.
6750
..
301
Continued Next Page
Completion Depth: 35.0
Remarks:
Date Boring Started: 6/24/09
Date Boring Completed: 6/24/09
SAMPLE TYPES
WATER LEVELS
Logged By: BWL
Auger Cutting 'Shelby Tube
While Drilling:
Drilling Contractor: Haztech
Drilling Method: HSA/CORE
End of Drilling:
Northing: 401418.0
® Split Spoon n Rock Core
Eastin : 1450558.8
hrs After Drilling:
9: DRY
The stratification lines represent approbmate boundaries. The transition may be gradual.