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FOUNDATION CERTIFICATION
LOT 88 OF "ARLINGTON HEIGHTS"
CITY OF TIGARD, WASHINGTON COUNTY, OREGON
PREPARED FOR,
I STONE BRIDGE HOMES NW
16869 SW 65TH AVE #505
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LAKE OSWEGO, OR 97086
I ---y+8' PUE
O LOT 89
25 S8816'24"E 93.02' + I I
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SCALE 1" = 20 FEET
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PUE = PUBUC UTIUTY EASEMENT
SSE = SANITARY SEWER EASEMENT
I, ROBERT RETTIG, A REGISTERED PROFESSIONAL LAND SURVEYOR IN THE,STATE OF OREGON, HEREBY CERTIFY THAT
I HAVE ACCURATELY STAKED THE FOUNDATION FOR LOT 88 OF "ARLINGTON HEIGHTS" WITH HUBS AND TACKS.
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REGISTERED 1
PROFESSIONAL JOB NAME: ARLINGTON HEIGHTS AKS ENGINEERING AND FORESTRY, LLC
LAN ► U' YOR 13910 SW GALBREATH DR = F=:�1
■ . .-_.._ SUITE 100
JOB NUMBER: 2643 SHERWOOD, OR 97140 i ' t
PHONE 503925.8799 r "`e
O‘G,N DRAWN BY: BDT/BTO FAX 503.925.8969
JANUARY 11, 2005
;3 = y r4 ?
ROBERT D. RETTIG CHECKED BY: RDR ENGINEERING • PLANNING • SURVEYING
601 24L
RENEWS: 12/31/14 DWG NO.: 2643CSTK FORESTRY • LANDSCAPE ARCHITECTURE
.•Aug. 12. 2013 4:22PM No. 3966 P. 1
±
-'941)(
GeoP 7;11
Engineering,Inc.
Real-World Geotechnical Solutions
•Investigation
•Design
•Construction Support
August 12, 2013
Project No.03-8449
Stonebridge Homes Job No. 1459 /5 37fO/ S Aft-14,_.17,..r�
Attention: Andy Thomas r- cf-- 3— O d/575—
Stonebridge Homes
4230 SW Galewood St., Ste. 100
Lake Oswego, OR 97035
Fax 503-387-7615
FOUNDATION SUBGRADE REVIEW
LOT 88–ARLINGTON HEIGHTS NO.3
15376 SW ARLINGTON TERRACE
CITY OF TIGARD,OREGON
GeoPacific Engineering Inc. visited the site this week to review the single family home foundation
layout on Lot 88. Some soft and organic fill was encountered in the lower central portion of the home.
This material was removed and replaced with reject rock. In our opinion, the observed subgrade is
now generally adequate for support to an allowable bearing pressure of 1,500 psf. The expected
maximum anticipated total and differential footing movements (generally from soil expansion and/or
settlement)are 1 inch and 3/A inch, respectively, over a span of 20 feet.
At the time of our final site visit, the excavation was complete and exposed stiff fill soils on the front
and stiff native soils on the lower footing line. These materials are considered adequate to support
the planned foundation loads. Footing-to-slope setbacks are adequate and footing-to-wall
setbacks are also adequate.
Due to relatively impervious soils encountered throughout the site, all foundations should incorporate
appropriate drainage measures in accordance with the International Residential Code. Adequate
crawlspace drainage is not something that geotechnical consultants can verify; the purpose of our
visit is for observations of foundation bearing conditions only.
Care should be taken to avoid saturation or disturbance of footing subgrade soils during and after
excavation. We observed some placement of crushed aggregate to protect the subgrade from wet
weather. If footing bearing soils become saturated or disturbed, any softened soil or slough should
be removed and replaced with crushed aggregate or additional concrete. In general, footing
excavations should be cleaned such that no more than about Y2 inch of loose soils is present prior to
pouring concrete.
14835 SW 72.1 Avenue Tel(503)5984445
Portland,Oregon 97224 Fax(503)941-9281
'Aug. 12. 2013 4:2 3 PM GeoPacific�tngineenng, Inc.
Job No.03-8449
Lot 88 Arlington Heights No.3
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. Within the limitations of scope, schedule
and budget, GeoPacific attempted to execute these services in accordance with generally accepted
professional principles and practices in the fields of geotechnical engineering and engineering
geology at the time the report was prepared. No warranty, express or implied, is made. If you have
any questions, please call.
Sincerely,
GeoPacific Engineering, Inc.
Eo PROpps
c;C GIN49`'O.
OREGQN
(4/ v423 100
EXPIRES:08/30120%S
James D. Imbrie,G.E.
Geotechnical Engineer