HomeMy WebLinkAboutPermit Field Test & Inspection Report 2008-2-6
',' .," Feb. t 2008 855AM
. No. 2355
P 8/16
.a
L(Aor a;~
01) 0~'
1" ~I
41/
l .
K &; A Engineering, Inc.
3327 Roanoke Ave., Eugene, OR 97408
(541) 684-9399 Voice
(541) 684-9358 FAX
enginE'ering
February 6, 2008 .
Project: 151.06
Hayden Enterprises, Inc.
2464 SW Glacier Drive #110
Redmond, OR 97756
Subject: Jasper Meadows subdivision--Lot225
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 srte is located on a residential/at on the east side of 58m Street in the new "Jasper Meadows"
subdivision, The site is mostly level and there are no apparent slope movement hazards. There is a drainage
ditch just east of the subject site. .
Foundation preparation involved constructing a level foundation pad on native undisturbed soils~ This required
excavating and removing approximately 1 to 2-feet of dark brown/black. wet, loose, organic sill, down to tan,
moist, moderately stiff, weathered sandstone After the excavatiOn and removal of the unsuitable subgrade
soilS, approximately 10 to 18-inches of %-inchminus dense graded crushed aggregate was placed and
compacted in the foundation pad area. This served to provide a uniform surface for footing construction. The
fill materials were placed, graded, and then compacted using a vibratory steel drum roller. ,
We tested the in-place density of the crushed aggregate fill and have determined that the average dry density is
an adequate percentage of maximum as determined by ASTM 0698. The field test results are attached to this
report.
. Feb. 7 2008 8 :55AM .
No. 2355 P. 9/16
K & A Engineering, Inc,
SUMMARY AND RECOMMENDATIONS
The project site, as prepared, is suttable to support the proposed foundations. We recommend a design
allowable bearing capacity of 1 ,50D-pounds per square foot
The soils ,present a moderate shrinlv'swell hazard. Foundation loads should bear on undisturbed native sins 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 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
not incluae 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.
~/
Steve SChultz,J.I,T..
K & A Engineering. Inc.
Client: Hayden Enterprises Jasper Meaddws-lot225,Springfield, OR'
Project: 15106
Page 2 of 2
February 6, 2008
- .' - Feb, 7, 2008 8:55AM
No. 2355 P 10/16
Density 01 Soil and Soil-Aggregates In-Place
ASTM D2922 and D3D17
proiect:1151.06
Site Address: Jasper Meadows.-Lot225
Permit No:
Dale: 2/5/2008
Density Test Type': DT-6
Operator: 5S
Material Type: 3/4-inch minus dense graded crushed aggregate
Maximum Dry Denslly, pct128.0
Standardl2allon and Reference Check I!,. Density
(Slandard Devlallons) (S.D.)
1
j
j
J
J
0.61
'II!,. Moisture, I
(S.D:)
1.02
Moist Dry'
Density, Density, Water Compaction,
TeslNo. pel pc", Content, % %, Remarks
1 137.9 121.1 13.9 94.6% I
2 136.9 120.1 14.0 938% I
3 139.3 119.8 16~3 93.6% I
4 135.4 121.5 11.4 95.0% I
I
,
J
I
I
j
J
J
I J
I I I I
I I I i
I ! I J
I I I
I I I
I ! I
j I j
- ,
I I
I I I
Average: 94~2%
Std. Dev~; 0.65%
, Direct Transmission (DT) (specify depth, in.) or Air Gap Backscatter (AGS) (specifiy(f)ouchable or (U)ntouchable
mode
Test pertormed using Seaman Nuclear Corp mOdel C~300, SN 21113
Client: Hayden Enterprises, Inc.
Project 151.06
K & A Engineering, Inc.
2/6/2008