HomeMy WebLinkAboutPermit Field Test & Inspection Report 2007-5-15
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K & A Engineering; Inc.
3327 Roanoke Ave., Eugene,.DR 97408
(541) 684.9399 Voice
(541) 684-9358 FAX
E'nginE'E'ring
May 15, 2007
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Project: 151.06
Hayden Enterprises, Inc.
2464 SW Glacier Drive #110
Redmond, OR 97756
Subject: Jasper Meadows subdivision--Lot21 0
Springfield, OR
Foundation Soils
PURPOSE AND SCOPE
At your request, K & A Engineering, Inc. has completed a geotechnical investigation of the existing soils on the
subject property. 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 determine 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 suitabiiity with respect to bearing capaCity and expansive soils~
FOUNDATION PAD PREPARATION
'III~ ~IUJ~Cl ,il~ j, jucd,~"'Umrresidential-lotilTlhe-new~JasperMeadows'-strbdiv;,;v,.. -:-ile-Iot-is-mostly-Ievel.
and there are no apparent slope movem'ent hazards.
FQundation preparation involved constructing a level foundation pad on native undisturbed soils. This required
excavating and removing approximately 2.5to 3.0-feet of undocumented fill, loose organic sill, and plastic silt
from the foundation oad area. After the excavation and removal of these soils. approximately 12-inches of %-
inch minus dense graded crushed aggregate was placed and compacted over approximately 2.5 to 6.0-feet of
8-inch minus "pit run" fill. This served to provideia uniform surface for footing construction. The fill materials
were placed in maximum lifts of 12-inches and compacted using a vibratory steel drum roller. K & A
Engineering inspected the excavation prior to placement of fill.
We tested the in-place density of the 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.
SUMMi\RY AND RECOMMENDATIONS
The projgct site, as prepared, is suitable to support the proposed foundations. We recommend a design
allowable bearing capacity of 2,500-pounds per square foot
K & A Engineering, Inc.
The soils present a moderate shrink/swell hazard. Foundation loads should bear on undisturbed native silts a
minimum depth of 36-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.
Thank you for the opportunity to be of service. Please call us if you have questions or need further assistance. .
Respectfully,
~~
Steve Schultz, E.I.T.
K & A Engineering, Inc.
EXPIRES 'IDEe' 3 0 200~
, Revised on 11/19/07 due to the platted lot numbers being different than the design lot numbers.
Client: Hayden Enterprises Jasper Meadows-Lot 210, Springfield, OR
Project: 151.06
Page 2 of 2
May 15, 2007
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Oensiiy of Soil and Soil-Aggregates In-Place
.ASTM D2922 and 03017
project:1151 ,06
Site Address: IJasper Meadows--Lot 210
Permit No:
Date: 5/9/2007
Density Test Type': DT-6,8
Operator: SS
Material Type:13/4" (-) from'Springfield Quarry
I Maximum Dry Densfiy; pcfl1280
I Standardization and Reference CheCkl1!. Density ::1
(Standard Deviations) (S,D.) 1.71
II!. Moisture, I
(S.D:) '1.53
Moist Dry
Density, Density, Water Compaction,
Test No. pel. pcf Content, % % Remarks
I 1 129,1 120,7 I 7,0 94.3%
I 2 130.3 I 120.4 I 8.2 94.1%
I 3 141.6 I 133.3 I 6.2 I 104.2%
I I I I
I I I
I I I I
I I I
I I I
I I I
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I I I I
I I I I
I I I I
I I I I
I I I I
I. I I I
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Average: 97.5%
Sid, Dev.: 5.77%
I Direct Transmission (DT) (specify depth, in.jor Air Gap Backscatter (AGB) (specifiy(T)ouchableor (U)ntouchable
mode ~ .
Test performed using Seaman Nuclear, Corp model Cc300, SN 21113
Client: Hayden Enterprises, Inc.
Project: 151.06
K & A Engineering, Inc.
11/19/2007