Report •
GeoP
Enguu:rnnp Inc
Real-World Geotechnical Solutions
Investigation•Design•Construction Support
March 12, 2016, 2015
Project No. 12-2704
Stonebridge Project No. 1848 c'Z l
Stonebridge Homes
4230 SW Galewood St, Ste. 100
Lake Oswego, OR 97035
Fax 503-387-7615
Email Andvtstonebridaehomesnw.com; JimDr'Astonebridgehomesnw.com;
kristentadmhhoIdinosco.com
RE: FOUNDATION EXCAVATION REVIEW
SOUTH VIEW SUBDIVISION LOT 11
15050 HARV ' e
-
11, 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 today to review the single family home foundation
subgrade on Lot 11. 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 3/4 inch, respectively, over a span of 20 feet.
At the time of our site visit, the excavation was nearly complete. The excavation consisted of
predominantly stiff native, residual clayey silt soil that could be probed less than 1 to 3 inches 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 adequate.
Due to 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) 5984445
Portland, Oregon 97224 Fax(503) 941-9281
' l
/
Project No. 12-2704
South View Lot 11
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:06/30/20f1
James D. Imbrie, P.E., G.E.
Geotechnical Engineer
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HORN CONSULTING ENGINEERS LLC
Memo
To: David Jensen
From: J.T. Roth Construction
Date: 5/6/2016
Re: 14053 SW 118th Court Tigard
We have reviewed the as-built condition of the newly built cast-in-place concrete front porch steps
at the above-mentioned residence. The new front steps have 6" concrete stem/side-walls and
are reinforced with#4 horizontals and verticals. We find that the new stairs are acceptable and
will serve to strengthen the existing concrete front porch stem wall.
04 - -•
717.7,
INeF41.
-JI' JPE
aVRON
Exoires: 6-3C'-17
1
9320 SW BARBUR BLVD. SUITE 135 • PORTLAND, OR • 97219
PHONE: 503.892.5782 • EMAIL: DAVE@HORNCE.COM