Report 09/13/2005 06:18 501359867x05 GEOPACIFIC ENG INC PAGE 01
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Real -World Geotechnicel Solutions ut it
Investigation • Design • Construction Support
September 13, 2005 /15 - Z5 - a 3 /
Project No. 03 -B183 / ,.56 Ste) L e /fie 1 < <-/A7
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Venture Properties, Inc.
4230 Galewood Street, Suite 100
Lake Oswego, Oregon 97035
Fax No. 503 - 670 -9099
RE: SOIL ENGINEER'S REVIEW OF FOUNDATION EXCAVATION SUBGRADE
LOT 117 SUMMIT RIDGE
TIGARD, OREGON
References:
1. GeoPacific Engineering Inc., GeotechnIcal Investigation, Summit Ridge Development, Tigard, Oregon, datod May 12,
2003.
2. GeoPac fie Engineering Inc., Soil and Wail Engineer's SuImary at Conclusion of Earthwork, Summit Rlage Development
— Phase 1, Tigard, Oregon, Revised January 21, 2004 (should state 2005).
GeoPacific Engineer, Jim Imbue, visited the site to review the foundation excavation subgrade. The observed
rock fill soils are stiff. to very stiff. Some mucking may be required if the subgrade is left exposed to wet
wcethor for o long duration, however the current subgradc is adequate and It has been exposed for about two
weeks. Based on our observations, it is our opinion that the current foundation_ subgrade is adequate for spread
foundation support to a maximum allowable bearing pressure of 1,500 psf. The foundation is sufficiently setbackf
from the rear yard rock wall so as not be influenced by the wall; me slope above the wall Is overly steep and
needs to be trimmed Fatter during final foundation baekfillirig and lot grading. Minimum reinforcement has been
recommended in the above Reference 2.
Our work scope pertains to a geotechnical engineer's foundation excavation review only and the conditions
cxioting and cxpascd of the time of our site visit. No deck footing, patio, or other appurtenant structure ,
subgrades were observed. Our work was performed to the current locel standards of practice. No other
warranty is herein expressed or implied. If you have any questions, please calf.
Sincerely,
GeoPacitic Engineering, Inc.
/mow 714743 �r
James D. Imbrie, P.E., C.E,G, OREGON
Geotechnical Engineer x'4 g
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