Report . - Ceoi:i
. . .
Engineering, Inc. .
Real -World Geotechnical Solutions
Investigation • Design • Construction Support
June 20, 2012
GeoPacific Project No. 11 -2373
Attention: Alan Goffmore
Pacific Evergreen Homes
7410 SW Oleson Road #133
Portland, OR 97223
Fax 503 - 208 -7127
Alanna.PacificEvergreenHomes.com
FOUNDATION EXCAVATION REVIEW
LOT 11 — BRITTANY MEADOWS
7894 SW HANSEN LANE y r / 91 Of ?- a°'o 7 9 '
CITY OF TIGARD, OREGON
GeoPacific Engineering Inc. visited the site yesterday to review the single family home foundation layout on
Lot 11. 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 nearly complete. The excavation consisted of predominantly
very stiff fill soil on the front half and medium dense native soil on the back half that could be probed about 6 to
12 inches with medium to heavy pressure using a steel "T" bar probe. These soils are considered adequate to
support the planned foundation loads. Footing -to -slope setbacks are not an issue and foundation embedment
depths appeared adequate.
Due to relatively impervious silty soils encountered throughout the site, all foundations should incorporate
appropriate drainage measures in accordance with the International Residential Code. Adequate crawlspace
drainage is not something that geotechnical consultants can verify; the purpose of our visit is for observations
of foundation bearing conditions only.
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, express or implied, is made. If you have any questions, please call.
Sincerely, � 0 pRac
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GeoPacific Engineering, Inc. 4V Q 14743 E/ •
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OREG 7 `�9 23 4514<('
James D. Imbrie, G.E. D.1
Geotechnical Engineer
EXPIRES: 06/30/20A.
14835 SW 72 Avenue Tel (503) 598 -8445
Portland, Oregon 97224 Fax (503) 941 -9281