HomeMy WebLinkAboutPermit Field Test & Inspection Report 2008-2-6
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K & A Engineering, Inc.
3327 Roanoke Ave., Eugene, OR 97408
(541) 684-9399 Voice
(541) 684-9358 FAX
February 6, 2008
Project: 151.06
Hayden Enterprises, Inc,
2464 SW Glacier O~ve #110
Redmond, OR 97756
Subject Jasper Mr.adows subdivision--Lot 227 - S 77 'i ,7v..-.,.c~
$pringfielcil, OR
Foundatio, Soils
PURPOSE AND SC(IPE
At your request, K ~ A Engineering, Inc. has completed a geotechnical investigation of the existing soils on the
subject property. OOr understanding IS that a wood-framed single-family residence supported by a cast-in-
place concrete spre~d footing foundation is proposed for construction on this site
The purpose of our J lVestigation was to determine the suitabilIty of the soils for construction of the proposed
structure, and prowe recommendations for construction of the foundation, The scope of our services 1$ limited
to general suitability with respect to bearing capacity and expansive soils.
FOUNDATION PAD rREPARATION
The project site is 10rated on a restdentiallot on the northwest corner of 58th Street and Pumice Place In the new
"Jasper Meadows" Fubdivision, The site is mostly level and there are no apparent slope movement hazards,
There is a buried 4-fllet in diameter concrete drainage pipe just to the north of the lot that IS oriented In the
east'west direction.
Foundation preparathm involved constructmg a level foundation pad on native undisturbed soils. This required
excavating and removing approximately 3 to 4,5-feet of dark brown/black, wet, loose, organic Silt After the
excavation and remo /al of the unsuitable subgrade soils, approximately 2,5 to 3,5-feet of %-inch minus dense
graded crushed aggr 19ate was placed and compacted in the foundation pad area. This selVed to provide a
uniform surface for f, )otlng constructIOn. The fill materials were placed, graded, and then compacted usmg a
vibratory steel drum roller.
We tested the in-plac e density of the crushed aggregate fill and have determined that the average dry density
exceeds 95% of max mum as determined by ASTM D698 The field test results are attaChed to this report,
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K Be A "~~_g~neering, Inc.
SUMMARY AND RECOMMENDATIONS
The project site, as prepared, is suitable to support the proposed foundations. We recommend a design
allowable bearing capacity of 1,500-pounds per square foot.
The SOIls present a moderate shrink/swell hazard Foundation loads should bear on undisturbed native silts a
minimum depth of 30-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 Enterpnses, Inc, and Its design consultants 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
nOl inciude 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 site
conditIOns,
Thank you for the opportunity to be of service. Please call us if you have questions or need further assistance.
Respectfully,
Steve Sc , E.I. T
K & A Engineering, Inc.
EXPIRES
Client: Hayden Enterprises Jasper Meadows-Lot 227, SpringfIeld, OR
Project: 151 06
Page 2 of 2
February 6, 2008
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Density of Soil and Soil-Aggregates In-Place
ASTM 02922 and D3017
Pro!ect:1151 06
Site Address: Jasper Meadows~Lot 227
Permit No:
Date: 2/5/2008
Density Test Type 1; DT-6
Operator: S8
Material Type: 3/4-mch minus dense graded crushed ag,gregate
Maximum Dry Denstiy, pcf 128,0
StandardizatIon and Reference Chec~~ Density
(Standard DeviationS)j(S.D.)
0.61
. L\ Moisture,
(S.D:)
1.02
Moist" Dry
Density, Density, Water Compaction,
Test No. pel pet Content, % % Remarks
1 1372 I 122.2 I 12.3 954%
2 138,6 I 126,2 98 98,6%
3 141.8 I 1271 11.6 99.3%
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Average
Std. Dev,:
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97,8%
2.04%
1 Direct Transmission (DT) (specify depth, In) or Air Gap Backscatter (AGB) (specifiy(T)ouchable or (U)ntouehable
mode
Test performed using Seaman Nuclear Corp model C-300, SN 21113
Chent Hayden Enterprises, Ine,
Project. 151,06
K & A Engineering, Inc.
2/6/2008