Report 05/04/2005 07:28 503599P'q5 GEOPACIFIC ENG ‘NC' PAGE 01
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Real-World Geotechnical Solutions
Investigation • Design • Construction Support
May 4, 2005 •
Project No, 03 -8183
Attention; Andy
Venture Properties, Inc.
4230 Galewood Street, Suite 100
Lake Oswego, Oregon 97035
Fax No 503- 870 -9099
RE: SOIL ENGINEER'S REVIEW OF FOUNDATION EXCAVATION SUSGRADE •
LOTS 78, 92, AND 111 SUMMIT RIDGE
• TIGARD, OREGON
References:
1. GeoPaclfic Engineering I nc, Geotechnlcal Investigation, Summit Ridge Development, Tigard, Oregon, dated May 12,
2003.
2. GeoPecif'ic 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 Lot 111 Tuesday to review the foundation excavation subgrade. The
. fill soils are compact clayey silt with rocks that probed firm, Some mucking may be required if the
- - subgrade ie. left exposed to wet weathor=fctr- r;- ^;,\orr$. atiort, twwever Uie current subgrade is conuidered
adequate. Based on &di obseivatiahs, -it is our opinion that the current foundation subgrade is suitable for
spread foundation support, to a maximum allowable bearing pressUre -of 1;5O0.psf.. Minimum reinforcement has
been recommended in the above Reference 2, Setbacks on the rear yard rockery wall is adequate,
. •
Also Reviewed tiie keystone wall removal at the back of Lot 78, the new nonengineered wall is being properly
founded on adequate fill sacs and is now appropriately setback from the rear yard rockery wall. GeoPaclfic also
reviewed "9he footing drain connection on Lot 78 to the rock wall drain, This is acceptable since the anticipated
flow is very small.
•
Our work scopeperteins to a geotechnicel 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 quer tions, please call.
Sincerely, •
•
.
• y OeoPaciflc Engineering, Inc. , PROps.
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14743 •
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OREGON
James D. lmbrie, P,E„ C,E.G. / ` 6.94, •q
Gealechnicai Engineer Ake- .
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