2007-08-10_PERMIT FILE - C1980007 ‎(4)‎

• Permit No: C1980007
• IBM Index Class Name: Permit File
• Doc Date: 8/10/2007
• Section_Exhibit Name: Exhibit 76 Report Spring 2007 Part 2
• Media Type: D
• Archive: No

Barr Engineering Company
4700 West 77th Street LOG OF BORING SB-06-02
BARR Minneapolis, MN 55435-4803
~ Sheet 1 of 4
Project: Monument Dam Location: Paonia, CO client: Mountain Coal Company
Barr Project Number: 06/26-067 ~ STANDARD PENETRATION NATURAL DRY
a~ TEST DATA DENSITY
w ~ c ~ ~ o N in blows/ft a0 (pct)
"~ MATERIAL DESCRIPTION ~ a >o io zo so ao ios tis ~zs
0
.
a
Z ~
~ ~ (ASTM D2488) ~.
` ~
a~i p ~ °~ a `o SHEAR STRENGTH, ksf Water Content,
W O ~ N Qp X UC ~ TV 3IE WV eN WL

0
Surtace Elev.: 7340.2 ~ VS D VSR O
t z s a '
20 ao so
SANDY SILT (ML), brown/white with oxidation, dry to moist,
medium dense
14 Q1

5 1
7335
17 ~ 7
I
1
j13
13 ~

10 7330.2 ~: ~ . I
7330 SILTY CLAY (CL-ML), with fine- to medium-grained sand, 10.0 I
brown/tan/gray/oxidation, moist, stiff; cobble-sized piece of 12 ry12
~
gray sandstone at 11.2' I
7327.7
LEAN CLAY (CL), trace to with fine- to medium-grained 12.5 / 1 29
sand, trace coarse-grained sand, trace fine- to 7 0
~
coarse-grained gravel (sandstone), brown/dark 18 3
brown/tan/oxidation, moist to wet, medium to stiff; dark 1
7325 15 brown material slightly organic, no medium- to
coarse-grained gravel and no dark brown material from 9
15.0-17.0' 9
I
8
I
7320 20
I
I
I 1 8
7317.7
SANDY LEAN CLAY (CL), trace fine-grained gravel, brown, 22.5 '
7 1 30
saturated, soft 3 ~
"3
7316.1 7 2
LEAN CLAY (CL), trace fine-grained sand, 73i5:~
di
b
/t
/
id
i
t
t
d I
7315 25 rown
an
ox
at
on sa
ura
e
me
um 25
0
"
"
.
LEAN CLAY (CL), gray, saturated, very soft;
spongy
feel 0
0
7313.5
SILTY SAND (SM), sand fine- to medium-grained, trace 26.7 :• .; ::
coarse-grained sand, trace fine-grained gravel, gray, :..:
saturated, very loose; sand content decreases with depth 7311.7 :. :. '. ~2
*VW piezometer installed at depth of 26.7 feet using the 28.5 2 y'
full -routed method PZ-O6-01 serial # 86374 t

30 Continued Next Pa e
Completion Depth: 93.3 Remarks:
Date Boring Started: 7/6/06
Date Borin
Com
leted: 7/7/06
g
p
Logged By: JDG SAMPLE TYPES WATER LEVELS
Drilling Contractor: DA Smith
illi
h
M
d
S
m Auger Cutting 'Shelby Tube SZ While Drilling: 22.5
-
ng
Dr
et
o
: H
A End of Drilling:
® Split Spoon ~ Rock Core
hrs After Drilling:
the stratification lines represent approximate boundaries. The transition may be gradual.