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-06-03
BARR Minneapolis, MN 55435-4803
~ Sheet 3 of 3
Project: Monument Dam Location: Paonia, CO client: Mountain Coal Company
Barr Project Number: 06/26-067 ~ STANDARD PENETRATION NATURAL DRY
a> TEST DATA DENSITY
~y ~ o ~ ~ Q N in blows/ft OO (pcf) ~Y
MATERIAL DESCRIPTION ~ a >o io 20 3o ao ios 115 125
~ Z ~
(ASTM D2488) a
` ~
d
~ ` ?~
~ SHEAR STRENGTH, ksf Water Content,
LJJ O ~ CA Qp X UC ~ TV 31f WP WN WL
~ VS ~ VSR O ~ 9~
60 1 2 4 20 40 60
LEAN CLAY (CL), trace to with fine- to medium-grained 60.0 1 29
sand, trace coarse-grained sand, trace to with fine- to 31 31
coarse-grained gravel, gray/dark browNtaNoxidation,
saturated, hard; layers of silty fine- to medium-grained sand,
7277'7
'
' I
I
trace fine-grained gravel at 60.5
and 61.3
, each layer about
62.5 :~:::::
3 mm thick looks like fill 31
POORLY GRADED SAND (SP), with silt, sand fine- to 31
medium-grained, grayish tan, saturated, dense; lean clay, ~
browNgray, from 63.7-64.1' but only in half of split spoon 7275.2 ~.:
7275 65 Ion itudinal contact 65.0 ~
LEAN CLAY (CL), trace fine- to coarse-grained sand, trace 48 a 8
to with fine- to coarse-grained gravel (gray shale and tan
sandstone), dark gray/browNtaNoxidation, saturated, hard; 7272 7
cobble in bottom of s lit s oon
67.5
SANDY SILT (ML), with clay, tan/oxidation, saturated, :
100
medium dense; trace fine-grained gravel below 69.1', 100 »
black/brown below 71.5', silty sand from 71.3-71.5'

7270 70
31

7265.2 : .
7265 75 SANDY LEAN CLAY (CL), to silty sand with clay, sand fine- 75.0
to medium-grained, grayish yellow, saturated, soft; soupy, 100 ,~ 100
grayish yellow sandstone fragments at bottom of split spoon,
1.1' recovery doesn't look like pick-up
'VW piezometer installed at depth of 77.8 feet using the 7261.7
full -routed method PZ-06-06 serial # 86378 78.5
End of boring at 78.5 feet, refusal
80
85
90
Completion Depth: 78.5 Remarks:
Date Boring Started: 7/7/06
rin
d: 7/9/06
Dat
B
C
let
g
e
o
omp
e
Logged By: JDG SAMPLE TYPES WATER LEVELS
Drilling Contractor: DA Smith
~ Auger Cutting 'Shelby Tube SZ While Drilling: 35
-
Drilling Method: HSA End of Drilling:
® Split Spoon ~ Rock Core
hrs After Drilling:
' The stratification lines represent approximate boundaries. The transition may be gradual.