Report eNf‘
GeoP ittc
Engineering, Inc.
14835 SW 72v° Avenue
Portland, Oregon 97224
Tel (503) 598 -8445 • Fax (503) 941 -9281
February 28, 2012
GeoPacific Project No. 12 -2492 �—
Fish Construction M `S t ZCD) I -00
justin(ahfishconstruc tionnw.com
1834 SW 58th Ave., Ste. 102
P hone OR9 503 - 2922-91
P 891 I[ 7Q 1Z,5 :--
Phone 2 9 / `(p(�(� �-
Fax 503 -297 -5801
FOUNDATION EXCAVATION REVIEW
LOT 32— BRITTANY MEADOWS
TIGARD, OREGON
GeoPacific Engineering Inc. visited the site on today to review the single family home foundation layout on Lot
32. We understand that the proposed building is a two-story home with a basement In our opinion, the
observed subgrade is generally adequate for support to an allowable bearing pressure of 1,500 psf; with the
possible exception of the SE corner where the storm lateral may interfere with the corner of the foundation. If
the lateral interferes, then it may need to be relocated and granular fill rec ompacted at this location.
At the time of our site visit, the excavation was complete. The excavation consisted of predominantly medium
dense, silty sand, native soil that could be probed about 1 to 3 feet with medium 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. 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
All foundations should incorporate appropriate drainage measures. Crawlspaces should be provided with a
low -point drain and pass through pipes should be installed through footings which would otherwise restrict
water flow to the low -point drain. Care should be taken to avoid saturation or disturbance of footing subgrade
soils during and after excavation.
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,
GeoPacific Engineering, Inc.
.40 PROFe
/1474,3RA �9 /p
James D. Imbrie, G.E.
Geotechnical Engineer • Q