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

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Barr. Engineering Company
4700 West 77th Street
BARR Minneapolis, MN 55435 -4803 LOG OF BORING B -8
Sheet 1 of 2
Project: Proposed RPE Expansion
Location: West Elk Mine, Somerset,
client: Mountain Coal Company
CO
Barr Project Number: 06/261003
STANDARD PENETRATION
NATURAL DRY
a
TEST DATA
DENSITY
w
o
\
N in blows /ft @
(pcf) it
w
MATERIAL DESCRIPTION
ii
> 0
10 20 30 40
105 115 125
°—
w
a
(ASTM D2488)
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C,
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d
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SHEAR STRENGTH, ksf
Water Content, %
W
O
E
to
Q X UC A TV )K
WP WN WL
co
VS n VSR O
Surface Elev.: 6779.3
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
@Q3
13
♦
6770
10
50/
SILTSTONE Light red very fine re siltstone. 10.0
9 grey dry ry grey
X X
50/1
X X
X x
1
>>@
X x
X x
X X
/
/
X X
X X
/
/
6765
X X
X X
x x
15
X X
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
X x
25
X X
> *1 1 1
50/4
X X
50/
X X
X X
X X
4
SANDSTONE Light - medium grey sandstone interbedded with 27.0
siltstone.
6750
30
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
Drilling Contractor: Haztech
Drilling Method: HSA/CORE
m Auger Cutting ,Shelby Tube
While Drilling:
Northing: 401418.0
N Split Spoon n Rock Core
End of Drilling:
Eastin : 1450558.8
hrs After Drilling: DRY
i ne stratincation lines represent appro)amate boundaries. The transition may be gradual.