Report GeoPacific
sorimmmi
Real-World Geotechnical Solutions
Investigation • Design • Construction Support
April 29, 2015
Project No. 12-2704
Stonebridge Project No. 1842 C/7\47:26 / 5 C°s() .1-6
Stonebridge Homes
4230 SW Galewood St., Ste. 100
Lake Oswego, OR 97035
Fax 503-387-7615
Email Andy gstonebridgehomesnw.com; JimDastonebridgehomesnw.com
RE: FOUNDATION EXCAVATION REVIEW
SOUTH VIEW SUBDIVISION LOT 5
151 , HARVEYS VIEW AVENUE
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
layout on Lot 5 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 nearly complete. The excavation consisted of
predominantly medium dense to dense, rocky fill soil that could be probed less than 2 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 and foundation embedment
depths appeared adequate. Some structural backfilling may be necessary to support short vertical
cuts in the interior of the crawlspace.
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 72nd Avenue Tel (503) 598-8445
Portland, Oregon 97224 Fax (503) 941-9281
Project No. 12-2704
South View Lot 5
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.
oa,03 PRO,cFS
�(
�� GIN€A,
,42 EV
OREG N
v
'4741Eg D.19J1e
EXPIRES:06/30/20/'
James D. Imbrie, P.E., G.E.
Geotechnical Engineer
- 2 -
FOUNDATION CERTIFICATION „ ,5 2,0 rs---ocoo
LOT 5 OF "SOUTH VIEW HEIGHTS" 1544 s `'
141.1.r vv-y
CITY OF TIGARD, WASHINGTON COUNTY, OREGON -+.-
1 1
I 1
LOT 6 S88'24'29"E 99.30'
o
in W C2 L=7.41 , \L 7 25.9' "'
tri
j- \\ �\ 56.00' 15.4'
W I o
W < < o
CC > �\ N
a a Cl L=23.99 i
= a 10.0' i 18.67'
W 1 2r o
DOC NO.
"i 2005-000643
co > 3 00' i N88'24'29"W " LOT 5 :o
I 19.32 0 3.00' �r
S1 >�/19.32'
o in
/
` 12.33'
/8.00,
/ /PUE in
/ i
/
. ; 55 dam-'
LOT 4 28.00' cd
5!): 15.4
0
i∎
M
-,, O
0 (/)
s•
DOC NO.
-0- 2005-092400
CURVE TABLE
CURVE RADIUS DELTA LENGTH CHORD
C1 45.00' 30'32'33" 23.99' N12'52'48"W 23.71'
C2 16.00' 26'33'06" 7.41' S14'52'32'14/ 7.35' C3 L=7.48'
C3 2045.00' 00'12'34" 7.48' S61'20'57"W 7.48'
cD '
SCALE 1" = 20 FEET AG"o
STE = STREET TREE EASEMENT
PUE = PUBLIC UTILITY EASEMENT r-_MAIN
01 -1?-6 20 0 8 12 16 20
REGISTERED
PROFESSIONAL I, ROBERT RETTIG, A REGISTERED PROFESSIONAL LAND SURVEYOR IN THE STATE OF OREGON, HEREBY
L U R V YOR CERTIFY THAT I HAVE STAKED THE FOUNDATION FOR LOT 5 OF "SOUTH VIEW HEIGHTS" WITH HUBS
AND TACKS.
PREPARED FOR SOUTHVIEW HEIGHTS
Coi E •N VENTURE PROPERTIES, INC. DRAWN BY:JFS(CHECKED BY:RDRIDWG:3252CSTK JOB: 3252
JANUARY 1, 2005 4230 SW GALEWOOD STREET AKS ENGINEERING & FORESTRY, LLC
ROBERT 1. RETTIG 12965 SW HERMAN RD SUITE 100
60124LS SUITE 100
RENEWS: 12j31/16 LAKE OSWEGO, OR 97035 TUALATIN, OR 97062 www.aks-eng.com AlltilL9(
PHONE: 503.563.6151 FAX: 503.563.6152
A crA/-S--'.- C/ 1 VC°
I
1059 2416-\\i" °
Sri
@MON—\� ®BC S88'24'29"E 99.30' @BC 1079
1060 % ■ „ ®MON
@MON �� \�-25 9 {
' Li 15.4 ---
1061 56.00 f
@MON `� 2425 °
v 11 ®BC
i i 2424
1062 ' ?0.0' 18.67' ®BC
@MON ----1.-- 1 II
1488'24'29"W/1 2422-�" 2423
Lo
1 1b.32 @BC g 3.00 C�BC
tr,
M 5 , .
1109 12.33'
/ / ®MON
/ /
■ / / , �,) 133
/ i 5(3 2420 FD1AN
■ °'/ / 2421 @BC o,
/ ' ABC xi./ 28.00'i , 15.4' N
1063 �1
1
@MON 1-2419 2416 o
. ®BC (ABC
—1064 c�, o
---@MON °I. c"
Ls
—1065
4 .,
@MON �'"
I
1
3
...._ ,--
1077
@MON
1075 1076,-�_, !�}"�
@MON ,®MON S6�'L0 ,
. 1.tr),,,..../-
.