HomeMy WebLinkAboutPermit Field Test & Inspection Report 2008-2-6
, i' F e b. 7. 2008 '8: 54 AM
\
No, 2355 P 2/16.
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fngineering.
Cb-r?qto ~
C '5 ' K & A Engineering, Inc.
/ ' (" a. ( 3327 Roanoke Ave., Eugene, OR 97408
, { v (541) 684-9399 Voice'
(541) 684-9358 FAX
February &, 2008
Hayden Enterprises, Inc.
2464 SW Glacier Drive #110
Redmond, OR 97756
Project: 151.06
Subject Jasper Meadows subdivision-Lot 223
Springfield, OR
Foundation Soils
PURPOSE AND SCOPE
At your request, K & AEngineering, Inc. has completed a geotechnical investigation of the existing soils on ,the
subject properly. Our understanding is that a wood:framed single-family residence supported by a cast-in-
, ,place concrete spread footing foundation is proposed for construction on this site~
The' purpose of our investigation was to detemnine the suitability of the soils for construction of the proposed
structure, and provide recommendations for construction of the foundation~ The scope of our services is limITed
to general suitability with respect to bearing capacity and expansive soils
FOUNDATION PAD PREPARATION
The prOject site is located on a residential lot on the east side of 5Sm Street in the new "Jasper Meadows"
subdivision, The site is mostly ievel and there are no apparent slope movement hazards. There is a drainage
ditch just east of the subject site.
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',... Foundation preparation involved constructing a level foundation pad on native undisturbed soils. This required
excavating and removing approximately 2 to 3-feet of dark brown/black, wet, loose, decomposing organic silt,
down to tan, moist, moderately stiff to stiff, weathered sandstone~ After the excavation and removal of the
unsuitable subgrade soils, approximately 1 to 2-feet of 6-inch minus "pit-run" was pla'ced, graded, and ~
compacted with a vibratory steel drum roller over ttie subgrade. Approximately 1 0 to 16-inches of %-inch
minus dense graded crushed aggregate was then placed graded and compacted in the foundation pad area over
the "pit-run". The pit run consisted of an open to well-graded 6-inch minus silty sandy gravel produced at a
~ local quarry source:
We tested the in-place density of the %-inch minus dense graded crushed aggregate fill and have determined
that the average dry density exceeds 95% of maximum as determined by ASTM 0698. The field test results are
attached to this report.' '.
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, Feb. 7 2008 8:54AM
No.2355 P 3/16
K & A Engineering, Inc.
SUMMARY AND RECOMMENDATIONS
The project site, as prepared, is suitable to support the proposed foundations. We recommend a design
ailowable bearing capacity of 1 ,SOD-pounds per square fool.
The soils present a moderate shrinlylsweil hazard. Foundation loads should bear on undisturtied native silts a
minimum depth of 24-inches below final grade around the perimeter foundation. The prepared foundation pad
meets these recommendations.
Final grading around the foundation pad should raise the grade above the foundation using native or imported
silts and should slope away from the foundation.
We recommend approval of the foundation pad, as constructed, by the building official.
LIMITATIONS OF THIS REPORT
ThiS report has been prepared for the exclusive use of Hayden Enterprises, Inc. and its design consunants for
the subject proposed structure.
This geotechnical investigation, analysis, and recommendations meet the standards of care of competent
geotechnical engineers providing similar services at the time these services were provided. We do not warrant
or guarantee these recommendations, site surface, or subsurface conditions. The scope of our services does
not inclUde construction safety precautions, techniques, sequences, or procedures, except as specifically
recommended in this report. Our services should not be interpreted as an environmental assessment of Me
conditions.
Thank you for the opportunity to be of service. Please call us ~ you have questions or need further assistance,
Respectfully,
~-
Steve Schultz, E.I. T.
K & A Engineering, Inc,
WIRES rfsl/'f-
Client: Hayden Enterprises Jasper Meadows-Lot223, Springfield, OR
Project: 151 ~D6
Page 2 of 2
February 6, 2008
Fe b, 7 2008 8S'4AM
No. 2355 P 4/16
Density 01 Soil and Soil-Aggregates In-Place
ASTM D2922 and 03017
Project: 151 ~06
Site Address: Jasper MeadowsnLot223
Permit No:
Date: 2/5/2008
Density Test rv~el; DT-6
Operator: SS
Material Type:13/4-lnch minus dense graded crushed aggregate
I Maximum Dry Denstiy, pc1l128,0
,. Standardization and Reference Checkl~ Density I I~ Moisture, I
(Standard Deviallons)I(S,D.) 0.61 (S.O:) 1.02
Moisl Dry
Density, Density, Water Compaction,
Test No. pel pel Content, % % Remarks
1 1400 122.0 14.8 95.3%
2 144.7 126.2 14.7 98.6% I
3 140.8 123.2 14.3 96.2% I
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Average:
Std. Dev.:
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97%
1.69%
, Direct Transmission (DT) (specify depth, in.) or Air Gap Backscatter (AGB) (specifiy(T)ouchable or (U)ntouchable
mode
Test performed using Seaman Nuclear Corp model C,300, SN 21113
Client Hayden Enterprises, Inc,
Project: 151.06
K & A Engineering, Inc,
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2/6/2008