Report a rely-
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Real-World Geotechnical Solutions
Investigation•Design•Construction Support
January 5, 2016
Project No. 13-3243
Pacific Evergreen Homes
7410 SE Oleson Road#133
Portland, OR 97223
Phone 503-664-6423
Fax Via email: alancoffmoreftmail.com
Subject: FOUNDATION SUBGRADE REVIEW
Graceland Lot 5
Tigard, Oregon
GeoPacific Engineering Inc. visited the site today to review the single family home foundation
subgrade on Lot 5. We understand that the proposed building is a two-story home. In our opinion,
the observed subgrade is 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 and soil subgrade exposed in
foundation excavation consisted of predominantly medium stiff native soils that probed stiff at about
2 to 3 feet deep with heavy pressure using a steel "T" bar probe. One small area was requested to
be cleaned of frost heaved soil. Footing-to-wall and footing-to-slope setbacks are not an issue and
foundation embedment depths appeared adequate.
Due to relatively impervious silty and clayey 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. .-
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Sincerely, 5 GlNgtr9s�0
GeoPacific Engineering,Inc. 147
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James D. Imbrie, G.E. � SO.IM �
Geotechnical Engineer EXPIRES:06/30/20
14835 SW 72"d Avenue Tel(503)598.8445
Portland,Oregon 97224 Fax(503)941-9281