Report 08/29/2005 09:56 5035989.705 GEOPACIFIC ENG INC PAGE 01
, Oz9CG — r
GeoP llie
,; En;ginCPHnp .r'i,
Real -World Geotechnical Solutions
Investigation • Design • Construction Support
August 28, 2005
Project No 03-8183
Attention; Andy
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
LOTS 105 AND 110 SUMMIT RIDGE
TIGARD, OREGON
References:
1. GeoPaclflc Engineering Inc., GeotechnIcal Investigation, Summit Ridge Development, Tigard, Oregon, dated May 12,
2003.
2. GeoPadflc Engineering Inc., Soil and Wall Engineer's Summary at Conclusion of Earthwork, Summit Ridge Development
- Phase 1, Tigard, Oregon, Revised January 21, 2004 (should state 2005).
GeoPacific Engineer, Jim Imbrie, visited the site to review the foundation excavation subgrades for Lots 105
he observed subgrade on Lot 110 consisted of hard in -situ rock. The observed subgrade on Lot"
5. consisted of engineered fill consisting of compacted rock and clayey silt. The houoo foundations appear
setback more than 10 feet from a rear yard rockery retaining walls and sufficient to avoid adversely
surcharging side yard wails.
Based on our observations, it is our opinion that the current foundation subgrade is suitable for spread foundation
support to ar`rnaxirnum allowable hearing prascr,ra of 1.,500 psf. with the exception of the northwest corner where
water has ponded and some mucking needs to be performed. 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
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,
GeoPaclflc Enginaering, inc.
s ir 14 p
OREGON
G
James oteoh ;n C. E.G. ;'
VA 23. la3 4 f o >
9 M-