Report rive51-MIN
FIELD REPORT
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GDI Project:
Polygon-129-03 Prepared By; Kyle Hanson
2J14/18
Project Name: I River Terrace East Date:
f.SW Scholls Ferry&Roy Rogers,Bvrm. Report#: 201
,Location:.
Arrival: ( 1045 Departure; 1245.
Weather:
i Sunny, 50s Permit#: TBD
Site Visit Requested By: Spencer(NEI); Ken(Polygon) Met With(on site): . Keywest crew, NEI Crew,
Spencer(phone), Ken(phone)
Purpose:
Observe wall backfill and lots 24-26,66, 173-175
Outstanding Issues: I 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
FR-177 soft fill from slope:cut in lots 153, 154 and 155
Wall 21 &Wall N of Snowdale St,
Upon arrival, I observed Keywest had compacted previously observed non-compacted backfill for Lock-i-Load wall 21
(see site plan and FR200). Crew were not backfilling during our site visit. I was informed that backfill material was
Y,"minus crushed rock sourced for Baker(Farmington).Compaction efforts were completed utilizing a large walk
behind plate compactor next to the wall and a small smooth drum roller for wall fill. Using a Troxler 3430 nuclear
density gauge, I tested the density of the granular backfill and compared the results against a lab produced proctor
(ASTM D1557)value of 127.2pcf at 13.6 percent optimum moisture content.Areas tested met or exceeded our
compaction recommendations of 95%compaction of maximum dry density value. I also observed subgrade for an
additional wall to be located north of Snowdale St. (see site plan). NEI crew informed me that 6"to 1' of crushed
rock base would be placed over the subgrade,which appeared to consist of brown sandy silt. I used a'A"diameter
steel foundation probe to evaluate the consistency of the subgrade material and observed probe penetrations
indicated generally medium-stiff to stiff subgrade conditions today.
Lots 24-26(at SW Beach Plums&Lot 66
I observed subgrade for lots 24-26 where shown on the attached site plan. The subgrade appeared to consist of
brown sandy silt,which was covered by approximately 2 inches of granular base. I used a W diameter steel
foundation probe to evaluate the consistency of the subgrade material (through the granular base);observed probe
penetrations indicated generally medium-stiff to stiff subgrade conditions today. I also observed lot 66(see site
plan);crew informed me that approximately 6"to 1' of%"-0 crushed rock from Tigard Sand&Gravel had been
placed over subgrade. Probe penetrations with a W diameter steel foundation probe indicated generally stiff
subgrade conditions today through the granular
tve a�4�diameter feel foundat on proben resistances of the 1 foot thick(fo tllintorthe cru hed
observed.
The number of one-handed blows required o dri
rock indicated.dense base conditions today.
Lots 173-175
NEI crew were not available to pothole/smooth surface spots for density testing. We recommend density testing of
the backfill material (see FR199)at the material surface and in contractor prepared potholes of approx. 2' in depth.
Conclusion
Based on observations,density testing,w , it is our opinion that the site plans, have been/are lots and wall prepared in
backfill/subgrade observed todayy,,where indicated on the attached
general accordance with our geotechnical recommendations.
9450 SW Commerce Circle,Suite 300 I Wilsonville,OR 97070 1503.968.8787 I www.geodesigninc.com
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-( ESIGN= FIELD REPORT
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Distribution::
Attachments:Site Plan/Map(3); NDGD(1)
Reviewed by:
This report presents opinions formed as a result of our observation of activities relating to geotechnical ung or erwironmental services.We rely on the contractor to comply with the plans and
spedflntlons throughout the duration of the project irespemve of the presence of our represen».Ourwork does not include supervision or direction of the convector,the contractor's employees
or agents,Our firm is not responsible for site safety.This field report is a DRAFT representation of our field'ccrgstveb is. recommendations.The report can only be
considered final upon review of the GeoDesign project manager.as indicated by initials in the"Reviewed 8y'section.
Signature:
9450 SW Commerce Circle,Suite 300 I Wilsonville,OR 97070 1503.968.8787 I www.geodesigninc.com