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Barr Engineering Company
<br />4700 West 77th Street LOG OF BORING SB-06-02
<br />BARR Minneapolis, MN 55435-4803
<br />~ Sheet 2 of 4
<br />Project: Monument Dam Location: Paonia, CO client: Mountain Coal Company
<br /> Barr Project Number: 06/26-067 ~ STANDARD PENETRATION NATURAL DRY
<br /> d TEST DATA DENSITY
<br />w ~ o ~~ o N in blows/ft O (pct)
<br />i t MATERIAL DESCRIPTION ~ a > o to zo so ao cos ~~s tzs
<br />' Z ~
<br />m
<br />~ oa (ASTM D2488) n ~
<br />
<br />m ~ ~ ~ a o SHEAR STRENGTH, ksf Water Content, "h
<br />W ~ E V1 Qp X UC ~ TV ~ Wp WN Wl
<br /> f 6 VS ~ VSR O
<br /> 30 1 2 3 4 20 40 60
<br /> LEAN CLAY (CL), gray, saturated, soft; several thin (1-2 ,~
<br /> mm) fine-grained sand lenses, material looks natural I N O
<br /> I 5.7
<br /> 7307.7 I
<br /> SILTY SAND (SM), sand fine-to medium-grained, trace 32.5 :• :: :: ~j
<br /> coarse- rained sand ra saturated loose 7306.7 . : :. p
<br /> 6 ~
<br /> LEAN CLAY CL ra saturated medium 33.
<br />
<br />35 3
<br />LEAN CLAY (CL), sandy to with fine- to medium-grained 7305.2 I
<br />7305 sand, gray, saturated, medium; coal seam (3 mm thick) at 35
<br />0
<br /> .
<br />34.3' di in at about 20 de rees .. .
<br />2 3
<br /> CLAYEY SAND (SC), fine- to medium-grained, trace 7303.7 .. 6 °
<br /> coarse-grained sand, gray, saturated, loose; alternating with 36.5 I
<br /> a ers of sand Ga ~
<br /> LEAN CLAY (CL), gray, saturated, medium; varved
<br /> appearance, fat clay from 36.8 to 37.0', looks natural 7301.4 5 5
<br /> SILTY SAND (SM), sand fine- to medium-grained, trace 38.8 •: :~ :: i
<br />I 2 .3
<br /> 40 coarse-grained sand, gray, saturated, loose; lean clay
<br />7300 41.0-41.4', 41.6-41.7', 41.8-42.0', and 43.8-44.5' (gray,
<br /> saturated, varved, layering 1-2 mm thick) 4 ~4
<br />'' O
<br /> ((
<br />I 33
<br /> IX
<br /> 5 ~5 3.9
<br />
<br />45 I
<br />7295 7294.6 . .
<br /> LEAN CLAY (CL), gray, saturated, medium 7~g;§ 7
<br /> SANDY LEAN CLAY (CL), trace fine-grained gravel, gray, 46.3 1 3 .5
<br /> saturated, stiff; la ers of sil sand with cla 7292.7
<br /> LEAN CLAY (CL), trace to with fine- to coarse-grained sand, 47.5 \
<br /> Vace fine-grained gravel, gray/brown/oxidation, wet, stiff; 16 01
<br /> layer of silty fine-grained sand (2" thick) at 48.9', several ~ ~ 1 9
<br />
<br />50 sandstone cobbles 7290 2 ~
<br />7290 LEAN CLAY (CL), trace to with with fine- to coarse-grained 50.0 ~
<br /> sand, trace to with fine- to medium-grained gravel, 7288 8 60 „ 60
<br /> gray/greenish gray/black/oxidation, saturated, very stiff; 51.4 .`~:~. :
<br /> looks like fill 7287 7 :~. . ~
<br /> POORLY GRADED SAND (SP), with silt, fine- to 52
<br />5 ~ x'
<br /> .
<br />medium- rained li ht ra saturated ve dense
<br /> LEAN CLAY (CL), trace to with fine- to coarse-grained sand, 26 C~
<br /> Vace to with fine- to coarse-grained gravel (shale),
<br /> 9ray/browrUtan/oxidation, saturated, very stiff to hard; looks \
<br />7285 55 like fill
<br /> 39 39
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<br />
<br /> 60 Continued Next Pa e
<br />Completion Depth: 93.3 Remarks:
<br />Date Boring Started: 7/6/06
<br />Date Borin
<br />Com
<br />leted: 7/7/06
<br />g
<br />p
<br />Logged By: JDG SAMPLE TYPES WATER LEVELS
<br />Drilling Contractor: DA Smith
<br />D
<br />illi
<br />M
<br />HSA
<br />h
<br />m Auger Cutting ,Shelby Tube SZ While Drilling: 22.5
<br />-
<br />r
<br />ng
<br />od:
<br />et End of Drilling:
<br /> ® Split Spoon ~ Rock Core
<br /> hrs After Drilling:
<br />the stratification lines represent approximate boundaries. The transition may be gradual.
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