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Plans (85) rYl Sr aa7 0CJo7 ' 2_St,) YJL&,,,ft_ kfil "RIVER TERRACE NORTHWEST' LOT 206, 207, 208, 209 AND 210 HUB AND TACK CERTIFICATION NE & SE 1/4 SEC. 6, T2S, R1 W. W.M. CITY OF TIGARD, WASHINGTON COUNTY. OREGON SURVEYED MARCH 14, 2017 PREPARED FOR:_ \ POLYGON NORTHWEST COMPANY TRACT \ *``' 109 E. 13T6-I ST. L 7.50' PUBUC UTILITY VANCOUVER, WA. 98660 \ EASEMENT R=1072.89' /'`6' PUBLIC UTILITY ..Na..a \ L=26.40` .r`\ , \ R=1072.89 \ LOT \ L=1 5.33' 0. 1© \ 206 00.$ -b , ,� ,� R=1072.89 o 'er \20l� ,,#, ; DESIGNZ FIELD REPORT Page l of 1 GDI Pro'-'ct: Polygon-130-05 Prepared By: Jim Guenther Project Name: River Terrace Northwest Date: 3/31/17 Location: Scholls Ferry Road and Roy Rogers Report#: 165 Arrival: 1000P De arture: 1030 Weather. Cloudy, 50's Permit#: TBA Site Visit Requested By: Sam (Polygon) Met With (on site): Sam Purpose: Evaluate Subgrade Outstanding Issues: FR 51 (01/14/16) Lot 122 to 123 retaining wall FR-136(9/14) Low density pavement Sun +leg 12 Subgrade Upon arrival, I spoke on the phone with Sam and was directed to the area indicated on attached site plan for the foundation subgrade for building 12, lot 206-210. When I arrived the crew had finished excavating the building to subgrade and had placed between 1"-6 of crushed rock over the subgrade (generally thicker on the west half of the building and thinner on the east half).The subgrade appeared to step down approximately l'-2' between lots 207 and 208,and again between lots 209 and 210.The rock was generally loose except for the thicker area on the west half. Ponding and saturated rock was observed on the surface of lot 210.We recommended that the water be drained or pumped out, and the material be allowed to dry prior to compaction of the rock in this area. Based on the excavation walls, I observed the subgrade to primarily consist of brown silt with sand and trace organics (native). I used a%2"diameter steel foundation probe to evaluate the relative consistency of the foundation subgrade. Based on the probing,the subgrade appeared to be generally very stiff to medium stiff.There was an approximately 4'x4' area that appeared to be soft based on probing in lot 209 (see attached site plan).We recommended that the soft area be over excavated approximately 1' and the material be replaced with crushed rock and compacted. Based on our observation and probing,the building foundation subgrade where observed today and indicated on the attached site plan, has been prepared in general accordance with our geotechnical recommendations. Distribution: Val. Attachments:Site Plan (1); Reviewed by: This report presents opinions formed as a result of our observation of activities relating to geotechnical engineering or environmental services.We rely on the i• to comply with the plans and specifications throughout the duration of the project Irrespective of the presence of our representatives Our work does not Includes or direction of+ ' ii,.the contractor's employees tofit or agents Ow firm Is not responsible for site safety.This field report is a DRAFT representation of our field rt . ,"r^f , Wally r :The report can only be considered final upon review of the GeoDesign project manager,as indicated by initials in the'Reviewed By" s.s• ,, *A r Signature: / 15575 SW Sequoia Parkway,Suite 100 I Portland,OR 97224 I Off 503.968.8787 I Fax 503.968.3068 `�°�� 204 k �} \\ ‘;'),P \ .; �'; \ 205 16 \ 4 \ ` v #¢ oe- . ' `®®.,�. TRACT L we z. 6.00' { 15 '`�: PUE, TYP 4 y 14 ' \c'\ " y.'' y 4'x4' area of \ �' 'f®°�i `\ soft subgrade 13 \\,,,,,. 6.00' ` \ ''',,,, 0� 4,0 '\�".—�/\ .• \ PUE, TYP \ Or \ 12 m� \ �" \ , 1 I \''''*: ' ','::''\J % \ \ : ���� X12 1 3.00' ,. +�, � . , ''''''''-, ''' '' \ * : 13 \ PUE, TYP \ ' \ '' 9 \ �/��- 215 \ , --.---.......r'•-.L.'--\\ ‘ '. , :.--','--.-''',''',.''',--t.,...,...i.,'-‘,‘,, , ,i3� \ C` �, ,.---' : , , ,'.„,,, ', : -- AL1 S `�•,: ,-*''"° BUFFER \ \ `), ' -" \ 8 N. !M^ ,,,,,e,.,:,. . .,... ........ As roxirrate location of evaluated sub • rade r