Report - 1
05!24!2005 16:36 503988705 GEOPACIFIC ENG INC PAGE 01
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Real -World Geotechnical Solutions
Investigation • Design • Construction Support
May 24, 2005
Project No 03 - 8183
Attention; Andy
'Venture Properties, Inc.
4230'Galewood Street, Suite 100
La - Oswego, Oregon 97035
Fax No. 503- 670 -9099
RE: SOIL ENGINEER'S REVIEW OF FOUNDATION EXCAVATION SUBGRADE
LOT 15, 31, AND 102 SUMMIT RIDGE
TIGARD, OREGON
References:
1. GeoPadnc Engineering Inc.. Geotechnlcal Investigation, Summit Ridge Development, Tigard, Oregon, dated May 12,
2003.
2, GeoFac4ric Engineering Ina, Soli and Wall Engineer's Summary at Conclusion of Earthwork, Summit Ridge Development
Pilatee =1, Tigard, Oregon, Revised January 21, 2004 (should state 2005).
GcoPacitic Engineer, Jim Imbrie, visited the site to review the foundation excavation subgradeS on the above -
.referenced lots, The observed soils on Lots 31 and 102 are are compact engineered fill consisting of clayey
"slit, with rocks, Some mucking. may be required if the subgrade is left cxpobod :to'vret.weather.roc.d - long ;
duration,. however the,current- fairly dry. The- rearf'ootings'are appropriately setback from the 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 ailowet,le bearing pressure of 1,ot/U PSf.
Lot 15 exposed hard rock that such that the allowable bearing pressure is over 5,000 psf. Some seepage of
groundwater is present emanating • from fractures In the rock. The crawispace should be well drained and
areas backfilledd with clean aggregate to allow water to drain through the backfill.
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 fooling, patio, or other appurtenant structure
subgrarles were observed. Our work woo porforrned to the current local standards of practice. NO other
warranty is herein expressed or implied. If you have any questions, please call,
Sincerely,
CeoPacific Engineering, Inc.
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James D. Imbue, P.E., C,E.G. OREGON0
Gentechnical Engineer 'k Ra 0
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