2009-11-08_PERMIT FILE - C1980007

• Permit No: C1980007
• IBM Index Class Name: Permit File
• Doc Date: 11/8/2009
• Doc Name: Coal Preparation Plan and Associated Coal Handling Facilities
• Section_Exhibit Name: Exhibit 81
• Media Type: D
• Archive: No

Barr Engineering Company
- 4700 W 77th St. Suite 200 LOG OF BORING SB09-12
BARR Edina, MN 55435
Sheet 2 of 4
Project: Proposed Coal Handling Location: West Elk Mine, Somerset, Client: Mountain Coal Company
Facilities CO
Barr Project Number: 06/261004 6 STANDARD PENETRATION NATURAL DRY
U7 TEST DATA DENSITY
o N in blows/ft O (pcf)
o s MATERIAL DESCRIPTION > 0 10 20 30 40 100 110 120
z
(ASTM D2488) a
o
0 T d F- o SHEAR STRENGTH, ksf Water Content, %
Ltl E CA Op X UC A TV )K Wp WN WL
W VS A VSR O
1 2 3 4 20 40 60
30 LEAN CLAY (CL) Dark grey-black clay with siltstone and 30.0
coal clasts. Some mudstone gravel. Moist. 11 11
I
I

25-

-
5- I
I
I
6 3 I
15
I
I
qi

6220- -40-
p23
23 1
I

6215-
-45- I

16
Q1
I
I

210-

50- I
I
I

19 19

6205- -55- 6205.0 \
WELL GRADED GRAVEL (GW) Siltstone gravel >1.5' with 55.0
l
l f
d
D
•?•
32
some c
ay an
coa
ragments.
ry-slightly moist. 32 0

4
•'• 1
6200 60 6200.0 1
Continued e a e
Completion Depth: 82.0 Remarks:
Date Boring Started: 6/29/09
Date Boring Completed: 6/29/09
Logged By: BWL SAMPLE TYPES WATER LEVELS
Drilling Contractor: Haztech
A
C
tti
,Sh
lb
T
b While Drilling:
Drilling Method: HSA uger
ng
y
u
e
u
e

® Split Spoon H Rock Core End of Drilling:
hrs After Drilling:
I ne stratitication lines represent approximate boundaries. The transition may be gradual.