Report (106) Ai T 2a($ -001S1 161i Sw btfc 5'r.
tf h C. (7077
t�av fo , D
G DESIGNW FIELD REPORT
Page 1 of 2
GDI Project: Polygon-129-03 Prepared By: Daniel Stai
Project Name: River Terrace East Date: 7/10/2018
Location: SW Scholls Ferry&Roy Rogers, Bvrtn. Report#: 252B
Arrival: , 1435 Departure: 1545
Weather: Partly Cloudy, 70's Permit#: TBD
Site Visit Requested By: Ken (Polygon) Met With (on site):
Purpose: Evaluate Lot Subgrades for Lots 106, 125, and 126
Outstanding Issues: Proof roll road and curb base rock and repair as needed before paving
FR-58 (12/06) - Decommission temporary storm and sewer lines through Tract E
125 and 126 Lot Subgrades FR 252 B (7/10/18)vertical cut at base of retaining walls on lots 119 and 126
Upon arrival, crews were beginning to place concrete forms on lot 125. Both lots 125 and 126 had been cut to bare
soil. Subgrade soil generally appeared to consist of brown silt with some silty fill to the north in the upper tiered
sections. I observed some cobbles in a portion of subgrade in lot 126. I used a'/2 inch diameter steel"T" probe to
evaluate relative consistency of the subgrades. Lot subgrades were generally observed to be stiff to very stiff based
on resistance to penetration of the probe.
Based on observations and probing, it is our opinion that the subgrades for lots 125 and 126 have been prepared in
general accordance with our geotechnical recommendations.
I observed that Lock+ Load walls on the west sides of lots 119 and 126 and adjacent to SW Redfox Terrace
appeared to have been undermined when the lot subgrades were excavated (see attached photos). We recommend
that contractor place and compact a wedge of crushed rock with a minimum slope of 1 /z to 1 (Horizontal to
Vertical) agairt the lower 6 inches of the lowest wall unit for temporary support.
Lot_106 to cover at least
I was informed crews had dug out soft areas in the upper portion of lot 106 and replaced with crushed rock. I
observed that crews had placed 2 to 6 inches of crushed rock in this area, which appeared to have been keyed in.
The 1 %2 inch minus crushed rock generally probed medium dense to dense and the underlying soil appeared
medium stiff to stiff.
Based on observations and probing, it is our opinion that the subgrade and replacement rock section in the topmost
tier of lot 106 had been prepared in general accordance with our geotechnical recommendations.
Distribution:
Attachments: Photos (2), Site Plans (2)
Reviewed by: (
f 9
This report presents opinions f /as a result of our observation oY activities relating to geotechnical engineering or invlreme a,.:des,We '; on the coot to comply with the plans and
specifications throughout the ration of the project irrespective of the presence of our representative. Our work does not I ..1 supervision or dire• •• of tit- o .i contractor's employees
or agents.Our firm is not responsible for site safety,This field report is a DRAFT representation of our field thee •e esting,and preliminary:';- me!. ;,The re. can only be
considered final upon review of the GeoDesign project manager,as indicated by initials in the"Reviewed By"section.
il
Signature: —.......,- ,I14 irs,
9450 SW Commerce Circle,Suite 300 I Wilsonville,OR 97070 1503.968.8787 I www.geodesigninc.com
M5T2c2($-obt5/ leriy 5w fIf - 5T
"RIVER TERRACE EAST"' { , OP q7
LOT 106 1.04-$ 106
HUB AND TACK CERTIFICATION
NE & SE 1/4 SEC. 6, T 2 S, R 1 W, W.M.
CITY OF TIGARD, WASHINGTON COUNTY, OREGON
SURVEYED APRIL 25, 2018
PREPARED FOR: SWBIRDSONG STREET
POLYGON NORTHWEST COMPANY
703 BROADWAY ST., SUITE 510
VANCOUVER, WA, 98660
trk.
45
N89158'43"W 42.00'
7 f
a)
6' PUBLIC UTILITY
EASEMENT ..—<... ——
1
r.:
a> 4,00'--+-
cv
0
0 3 Lei
LOT ' LOT °s LOT
4.00'
o iti105 106' w 107
Ui
"' _ p
0
cs; 0 Z
00
15 zv
' REGISTERED In b LA
u PROFESSIONAL "' 0
LAND SURVEYOR ' e'
0
r.
OREGON ,42.00
JULY 9,2002
TRAVIS C.JANSEN
z 57751
n
RENEWS:6/30/2019 (rii)
? I, TRAVIS C. JANSEN, A REGISTERED PROFESSIONAL LAND 20 SCALE 100 20
SURVEYOR IN THE STATE OF OREGON, HEREBY CERTIFY THAT
0 I HAVE ACCURATELY SURVEYED AND STAKED THE OFFSETS
TO THE FOUNDATION ENVELOPE FOR LOT 106 OF THE PLAT 1 INCH 20 FEET
g OF "RIVER' TERRACE EAST".
as
DRAWN BY: T2DATE: 521 X18 PACIFIC COMMUNITY DESIGN
REVIEWED BY. - TCJ DATE: 5/21/18
PLANNING - ENGINEERING - SURVEYING
PROJECT NO.: 39'5-041 (503) 941-9484