Report (37) — -`1)1\r„.
Geo Pacific
Real-World Geotechnical Solutions
Investigation• Design•Construction Support
October 20, 2015
Project No. 12-2704
Stonebridge Project No. 1850 f1 S12e
Stonebridge Homes
4230 SW Galewood St., Ste. 100
Lake Oswego, OR 97035
Fax 503-387-7615
Email AndyAstonebridgehomesnw.corn: JimD(a�stonebridgehomesnw.com:
kristen(a�dmhholdingsco.corn
RE: FOUNDATION EXCAVATION REVIEW
SOUTH VIEW SUBDIVISION LOT 13
15020 HARVEY'S VIEW LANE__
TIGARD, OREGON
References: GeoPacific Engineering, Inc., Geotechnical Explorations, Knauss Property
Subdivision, 12035 Southwest Beef Bend Road, Washington County, Oregon, report
dated August 10, 2012
GeoPacific Engineering Inc. visited the site on yesterday to review the single family home foundation
subgrade on Lot 13. We understand that the proposed building is a two-story home. In our opinion,
the observed subgrade is,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 ' inch, respectively, over a span of 20 feet.
At the time of our site visit, the excavation was more than half complete. The excavation consisted
of predominantly stiff native, residual clayey silt soil that could be probed less than 1 inch with heavy
pressure using a steel "T" bar probe. These soils are considered adequate to support the planned
foundation loads. Footing-to-slope setbacks were not an issue.
Due to rocky and silty soils encountered throughout the site, all foundations should incorporate
appropriate drainage measures. Crawlspaces should be provided with a low-point drain and pass
through pipes should be installed through footings which would otherwise restrict water flow to the
low-point drain.
Care should be taken to avoid saturation or disturbance of footing subgrade soils during and after
excavation. If footing bearing soils become saturated or disturbed, any softened soil or slough
should be removed and replaced with crushed aggregate or additional concrete.
14835 SW 72"d Avenue-
Tel (503) 598-8445
Portland, Oregon 97224 Fax (503) 941-9281
Project No. 12-2704
South View Lot 13
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.
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EXPIRES:06/30/20/7
James D. Imbrie, P.E., G.E.
Geotechnical Engineer
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•.r FOUNDATION "ASPEN RIDGE" LOT 35
UNDATION S88'17'18"E 50.00'
CERTIFICATION
LOT 13 OF
"SOUTH VIEW HEIGHTS"
CITY OF TIGARD,
WASHINGTON COUNTY, 50' o
OREGON i 28.00 0
cid 12.00'
N.
CURVE TABLE 5.0'LI
O rte), O
CURVE RADIUS DELTA LENGTH CHORD ? °, LOT 13 co c,
o W
Cl C 48.00' 29'50'30" 25.00' N35'03'36"W 24.72' Z o° e
C\; o
d- h• O
LOT 14 'n �'
Q
PREPARED FOR 5° 27.00' 0 ti
VENTURE PROPERTIES, INC. a:. W
4230 SW GALEWOOD STREET, SUITE 100 I6�QS �' 5.0'
LAKE OSWEGO, OR 97035 ���F, 13.00' i
\ b b r\ 6. ` ~\ \ \.\ \ o`` \ J
� \
., \\ .�°A 6 N LOT 12
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EVAE
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4e/ # 'r`'\ g 0' PUE SCALE 1" = 20 FEET
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\■‘ EVAE = EMERGENCY VEHICLE ACCESS EASEMENT
PUE = PUBLIC UTILITY EASEMENT
STE = STREET TREE EASEMENT
I REGISTERED I, ROBERT RETTIG, A REGISTERED PROFESSIONAL LAND SURVEYOR IN THE STATE
PROFESSIONAL OF OREGON, HEREBY CERTIFY THAT I HAVE STAKED THE FOUNDATION FOR LOT
LAN ' S U YO R 13 OF "SOUTH VIEW HEIGHTS" WITH HUBS AND TACKS.
SOUTH VIEW HEIGHTS LOT
13
o -EC/72/:
JANUARY 11, 2005 AKS ENGINEERING & FORESTRY, LLC oRwN: WCB
ROBERT D. RETTIG 12965 SW HERMAN RD, STE 100 cHKO: RDR
60124LS TUALATiN, OR 97062 AKS JOB:
RENEWS: 12/31/16 P:503.563.6151 F:503.563.6152 aks-eng.com 3252