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Barr Engineering Company
<br />4700 West 77th Street LOG OF BORING SB-06-04
<br />BARB Minneapolis, MN 55435-4803
<br />~ Sheet 1 of 2
<br />Project: Monument Dam Location: Paonia, CO client: Mountain Coal Company
<br /> Barr Project Number: 06/26-067 ~ STANDARD PENETRATION NATURAL DRY
<br /> m TEST DATA DENSITY
<br />w ~ o ~ ~ \ N in blows/ft OO (pcf) YY
<br />o `~ MATERIAL DESCRIPTION ~ a > o to zo so ao tos »s ~zs
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<br />io (ASTM D2488) a
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<br />y 0 ` ~ a c SHEAR STRENGTH, ksf Water Content,
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<br />
<br />Surface Elev.: 7307.0 f0 VS ~ VSR O
<br />~ z s a
<br />zo ao so
<br /> 0 CLAYEY SILT (ML), trace medium- to coarse-grained sand,
<br /> dark brown, moist, loose
<br />7305
<br /> 7303.3 11 11
<br /> SILTY SAND (SM), to fine-grained sand with silt, trace fine- 3.7 ;'~ .: ::
<br />
<br />5 to coarse-grained gravel (sandstone), tan, moist, medium I
<br /> dense
<br />1
<br /> 16 T
<br />7300 I
<br />I
<br />
<br />~~
<br />17 I
<br />l0
<br />7
<br /> 729
<br />7.9 . . :. '
<br /> 10 8
<br />LEAN CLAY (CL), trace fine- to medium-grained sand, trace 7297:
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<br />o coarse-gra
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<br />grave
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<br />rown, mo
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<br />10
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<br />:
<br />:
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<br />ve stiff
<br />7295.9
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<br />SILK SAND
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<br />12 /
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<br /> ne-gra
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<br />race
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<br />11
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<br />7295 .
<br />to coarse-grained gravel (sandstone), tan, moist, medium
<br /> ense
<br />LEAN CLAY (CL), trace to with fine- to medium-grained
<br />X
<br />/
<br /> sand, trace fine- to medium-grained gravel (shale and 7293.4 1 33
<br /> 7 4
<br /> sandstone), brown/gray/oxidation, moist, soft to stiff; 13.6
<br /> saturated below 12.5'
<br /> SANDY CLAY
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<br />CL
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<br /> 15 (
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<br /> medium-grained, tan/gray/oxidation, saturated, medium to P12
<br /> stiff; silty fine- to medium-grained sand, gray/oxidation, from 12
<br />7290 16.1-16.4', 16.8-17.0', and 19.2-19.5'
<br /> X
<br />
<br /> 7 q
<br /> 7287.0 I
<br /> 20 Mixture of: 1. POORLY GRADED SAND (SP), with silt, gray, 20.0 ~:~ .: ::
<br /> saturated 2. LEAN CLAY (CL), trace to with fine- to 10 10
<br /> medium-grained sand, trace fine-grained gravel,
<br />7285 gray/oxidation, saturated 3. SILTY SAND (SM), sand fine- to ' ~ :~ . ~
<br />: ~
<br /> 7284 5 .
<br />~ C
<br /> medium-grained, reddish brown, saturated 22 5 ~
<br /> •VW piezometer installed at depth of 20.0 feet using the
<br />1
<br /> full -routed method PZ-O6-07 serial # 86612 16 Q
<br /> LEAN CLAY (CL), trace to with fine- to medium-grained I
<br /> sand, trace fine- to coarse-grained gravel (mostly gray 7282.0
<br /> 25 sandstone, some dark gray shale), gray/brown/oxidation, 25.0 : .: ~ ::
<br />1
<br /> aturated stiff to ve stiff 728
<br />6 ~ ~ ; 19 19
<br /> 0
<br />SILTY SAND (SM), sand fine-grained, trace fine-grained
<br />7280 ravel sandstone ra ish tan saturated medium dense
<br />722®.S ~
<br />: :• . /
<br /> LEAN CLAY (CL), trace fine- to medium-grained sand, trace 27 5 :~ : : ~
<br /> fine-grained gravel (shale), gray/brown/oxidation, saturated, :
<br />1
<br /> ve stiff 14 q
<br /> POORLY GRADED SAND (SP), trace to with silt, sand fine- ~
<br /> to medium-grained, light gray with some oxidation, saturated,
<br /> 30 Continued Next Pa e
<br />Completion Depth: 56.5 Remarks:
<br />Date Boring Started: 7/9/06
<br />Date Borin
<br />Com
<br />leted: 7/10/06
<br />g
<br />p
<br />Logged By: JDG SAMPLE TYPES WATER LEVELS
<br />Drilling Contractor: DA Smith
<br />D
<br />illi
<br />M
<br />th
<br />d
<br />HSA m Auger Cutting 'Shelby Tube ~ While Drilling: 12.5
<br />r
<br />ng
<br />e
<br />o
<br />: 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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