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Real - World Geotechnical Solutions
Investigation 0 Design a Construction Support
March 30, 2005
Project No. 03-8183
Attention; Andy
Venture Properties, Inc.
4230 Galeweod Street, Suite 100
Lake Oswego, Oregon 07035
Fax No. 503-870-9099 •
RE: SOIL ENGINEER'S REVIEW OF FOUNDATION EXCAVATION SUEGRADE
LOT 21 SUMMIT RIDGE
TIIGARIO, OREGON
References:
1. aeoPacific Engineering Inc., Geotechnical Investigation, Summit Ridge Development, Tigard, Oregon, dated May 12,
2003.
2. GeoPaclflc Engineering Inc:., SviI 4,110 Wall eriyh eur'e Summary at Conolutcion of Carthvoork, 6urnmit Ridge Davolopment
— Phase 1, Tigard, Oregorr, Revised January 21, 2004 (should state 2005).
GeoPacific Engineer, Jim imbrie, visited the site yesterday to review the foundation excavation subgradc on
the above - referenced lot, The observed soils are compact engineered fill consisting of clayey silt with rocks.
Some mucking may be required if the subgrade is left exposed to wet weather for a long duration, however the
current subgrade is fairly dry. The foundation an Lot 21 is appropriately setback from the side and rear yard
rockery retaining walls.
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.
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. No deck footing, patio, or other appurtenant structure
subgrades were observed. Our work was performed to the current local standards of practice. No other
warranty is herein expressed or implied. If you have any questions, please call.
Sincerely,
GeoPacltic Engineering, Inc.
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James O. Imbrie, P.E,, C.E.G. O
Geotechnical Engineer / J ib
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