HomeMy WebLinkAboutPermit Field Test & Inspection Report 2007-5-15
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K & A Engineering, Inc.
3327 Roanoke Ave" Eugene, OR 97408
(541) 684,9399 Voice
(541) 684-9358 FAX
E'nginE'E'ring
May 15, 2007
Project: 151.06
Hayden Enterprises, Inc,
2464 SW Glacier Drive #110
Redmond, OR 97756
Subject: Jasper Meadows subdivisionnLot 215
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 suitability with respect to bearing capacity and expansive soils. ,
FOUNDATION PAD PREPARATION
The project site is located on a residential lot in the new "Jasper Meadows'! 'subdivision, The lot is mostly level
and there are no apparent slope movement hazards,
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FoundatioQ preparation involved c6nstru'cting a level foundation pad on native undistu'rbed soils, This required
excavating and removing approximately 1,5 to 2,0.feet of decomposing organic si~ from the foundation pad
area, After"the excavation and removal.of these soils, approximatelyl,O,foot of 7'4'inch minus dense graded
( crushed aggregate was placed and compacted over approximately 1 ,Oto 3,O,feet of 8~inch minus "pit run" fill,
This served to provide a 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:D698, The field test results are attached to this report,
SUMMARY AND RECOMMENDATIONS
The project site, as prepared, is suitable to support the proposed foundations, We recommend ,a design
allowable 'bearing capacity of 2,500,pounds per square foot
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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 forthe opportunity to be of service, Please call us if you have questions or need further assistance,
Respectfully,
Steve Schultz, En,
K & A Engineering, Inc,
EXPIRES
IDEe' 3 0 200a
. Revised on 11/19/07 due to the platted lot numbers being different than the design lot numbers,
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, Client: Hayden Enterprises Jasper Meadows~kot 215, Springfield, OR
, Project: ,151.06
Page 2 of 2
May 15, 2007
Density of Soil and Soil-Aggregates In-Place
ASTM 02922 and 03017
Project:' 151. 06
Site Address: Jasper Meadows--Lot 215
Permit No:
Date: 5/9/2007
DensityTest Type': OT,6
Operator: SS
I Material Type: 3/4" (,1 from Springfield Quarry
Maximum Dry Denstiy, pcfi 128,0
I Standardization and Reference Checkl/,' Density
(Standard Deviations) (S,D.) 1.71
1/1 Moisture, I
(S,D:)
1,53
Moist Dry
Density, Density, Water Compaction,
Test No, pcl pel Content, % % Remarks
1 138,0 128,3 7,6 100,2% I
2 135,8 126.4 7.4 98,8% I
3 132,8 125,2 6,1 97,8% I
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Average: 98,9%
Std, Oev,: 1,21%
1 Direct Transmission (OT) (specify depth, in,) or Air Gap Backscatter (AGB) (specifiY(f)ouchable or (U)ntouchabie
mode
Test per10rmed using Seaman Nuclear Corp model C-300, SN 21113
Client: Hayden Enterprises, Inc,
Project: 151.06'
K'& A Engineering, Inc,
11/19/2007