HomeMy WebLinkAboutPermit Field Test & Inspection Report 2007-4-3
K & A Engineering, Inc.
3327 Roanoke Ave., Eugene, OR 97408
(541) 684-9399 Voice
(541) 684-9358 FAX
engineering
April 3, 2007
Project: 151.06
Hayden Enterpnses, Inc.
2464 SW Glacier Drive #110
Redmond, OR 97756
Subject Jasper Meadows subdlvlsion--Lqt 228 S 7'6 Pu ry\ I (' ~
Spnngfleld, OR
Foundation SOIls
PURPOSE AND SCOPE
At your request, K & A Englneenng, 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 footmg 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 beanng capacity and expansive salls,
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
Foundation preparation Involved constructing a level foundation pad on native undisturbed sOils This reqUired
excavating and removing approximately 12 to 24-Inches of loose organic silt, plastic silt, and decomposing
organic silt from the foundation pad area. After the excavation and removal of these sOils, approximately 36-
Inches of %-Inch minus dense graded crushed aggregate was placed and compacted This served to provide a
uniform surface for footmg construction The fill materials were placed In maximum lifts of 12-lnches and
compacted uSing a vibratory steel drum roller
We tested the In-place denSity of the crushed aggregate fIll and have determmed that the average dry denSity
exceeds 95% of maximum as determmed by ASTM 0698 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
K & A Engineering, Inc,
The sOils present a moderate shnnk/swell hazard Foundation loads should bear on undisturbed native silts a
minimum depth of 36-lnches below final grade around the penmeter foundation The prepared foundation pad
meets these requirements
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 Engineenng, Inc,
EXPIRES JJ.FC' 3 0 10n6'
. Revised on 11/19/07 due to the platted lot numbers being different than the design lot numbers
Client' Hayden Enterpnses Jasper Meadows-Lot 228, Spnngfleld, OR
Project 151 06
Page 2 of 2
Apnl 3, 2007
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Density of Soil and SOil-Aggregates In-Place
ASTM 02922 and 03017
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I Maximum Dry Denstiy, pcf 128 0
Standardization and Reference Check tl Density
(Standard Deviations) (S.D,)
Project 151 06
Site Address: Jasper Meadows--Lot 228
Permit No:
Date: 4/3/2007
Density Test Type 1: DT-6
Operator' SS
Material Type: 3/4" (-) from Spnngfleld Quarry
093
tl Moisture,
(S,D:)
094
MOist Dry
Density, Density, Water CompactIon,
Test No, pcf pcf Content, % % Remarks
1 1279 118 1 83 923%
2 1345 1249 77 976%
3 1322 1220 83 953%
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Average 95.1 %
Std Dev' 2 67%
1 Direct Transmission (DT) (specify depth, In) or Air Gap Backscatter (AGB) (speclfly(T)ouchable or (U)ntouchable
mode
Test performed uSing Seaman Nuclear Corp model C-300, SN 21113
Client Hayden Enterpnses, Inc
Project 151 06
K & A Englneenng, Inc,
11/19/2007