Report GeoPacific
Engineering, Inc.
Real -World Geotechnical Solutions
Investigation • Design • Construction Support
December 26, 2013
GeoPacific Project No. 11 -2373
Attention: Paul BIy
paulbivano omail.com
Pacific Evergreen Homes
7410 SW Oleson Road #133
Portland, OR 97223
Fax 503 - 208 -7127
Alan( PacificEvergreen Homes.com
FOUNDATION SUBGRADE REVIEW
LOT 1 — BRITTANY MEADOWS
CITY OF TIGARD, OREGON
GeoPacific Engineering Inc. visited the site today and last Monday to review the single family home foundation
subgrade on Lot 1. We understand that the proposed building is a two -story home. In our opinion, the
observed subgrade is generally adequate for support to an allowable bearing pressure of 1,500 psf. The
expected maximum anticipated total and differential footing movements (generally from soil expansion and/or
settlement) are 1 inch and'/ inch, respectively, over a span of 20 feet.
At the time of our site visit, the excavation was complete. The rear half of the excavation consisted of
predominantly medium dense silt fill soil that could be probed about 1 to 4 inches with medium to heavy
pressure using a steel "T" bar probe and the front half exposed stiff fill. Some loose soil was present in
localized areas, this should be removed from beneath footings. The subgrade is considered adequate to
support the planned foundation loads. Footing -to -slope setbacks are not an issue and foundation embedment
depths appeared adequate.
Foundations should also incorporate appropriate drainage measures in accordance with the International
Residential Code. Adequate drainage is not something that geotechnical consultants can verify; the purpose
of our visit is for observations of foundation bearing conditions only. Some structural backfill is required to
support the bank above the daylight basement retaining wall.
Our work scope pertains to a geotechnical engineer's foundation excavation review only and the conditions
existing and exposed at the time of our site visit. Within the limitations of scope, schedule and budget,
GeoPacific attempted to execute these services in accordance with generally accepted professional principles
and practices in the fields of geotechnical engineering and engineering geology at the time the report was
prepared. No warranty, expressed or implied is made. If you have any questions, please call.
Sincerely, �
GeoPacific Engineering, Inc. • � 4 r
OREGON
James D. Imbrie, G.E. fq�N 23'
Geotechnical Engineer 41 S D.0
14835 SW 72 Avenue PIn J Tel (503) 598 -8445
Portland, Oregon 97224 Fax (503) 941 -9281
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$ 14786 S.W. 80TH AVENUE
NW 1/4 SEC. 12, T2S, R1W, W.M.
CITY OF 11GARD
WASHINGTON COUNTY, OREGON
DECEMBER 20, 2013 tea.
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THIS DRAWING IS NOT INTENDED TO BE USED FOR PO BOX 3251 1
THE PURPOSES OF A MORTGAGE LOAN INSPECTION CLACKA
850 — MAS, OR 97015
PHONE (503) 850 -4672 FAX (503) 850 -4590 .. 1
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