Laserfiche WebLink
Carlson Testing, Inc. <br /> <br />July 10. 1967 <br /> <br />P.O. I~x 23814 <br />~igard. On,ion 97281 <br />Phone (503) 604,3460 <br />FAX (503) im4-0954 <br /> <br />CTI #97-G1 I06A <br /> <br />Craig Roberts <br />24085 Butteville Road <br />Aurora, OR 97002 <br /> <br />GEOTECHNICAL REVIEW OF SLOPE FAILURE <br />24035 BUTTEVILLE ROAD <br />BUTTEVILLE, OREGON <br /> <br />REFERENCE: GEOTECHNICAL REVIEW OF SLOPE FAILURE, ROBERTS AND ALTON RESEENCES, <br /> BUTTEVlLLE, OREGON, CTI #97-G1106A, DATED JUI~ 20.1997. <br /> <br />At your re~pmst, our engirmm, ami DeoloDist have vildted the ~ <br />g a~ent to two p~ ~ s~ dv~nk fai~. We ~ ~ ~e b~gs <br />~the adjacem sitesf~ ~a~ a ~ ~~ ~t. Th~u <br />~matiens are i~l~ ~ thh r~ o~ ~ c~e~ m~~ ~ ~ ~t~fls ex~ <br />~ 24035 Bm~He ~fl ~ ~. <br /> <br />BACKfi~D <br /> <br />At tim Alton reaid~,ca, relmrtudly the outer 15 to 20 feet of dvedmmk west of the dock stairs has <br />slid into the river and was ~ waehed away. The scarp is very near the existlltg deck supl~rts. <br />Theuppet 10 feet of slope appemstoheonc~fllL Atmid~inlhe freddvexposed dyer <br />bank a laver of deflse fine gravel wall e~po~ed. Seepage is evidonml toward the hottom of this gravel <br />layer. <br /> <br />The Roberts Residence has exparleflced lateral moveme~lt of varying de~r~s, increasing toward the <br />slope. The bank did not completely fail, but moved several feet at the worst location. Evidence of <br />lateral movemm~t to a lesser degree was el~erved along the house, such as: tilted deck supports and <br />downdropped deck, patio slab pulli~l away fr~rn house, end settlement ~acks in tho foundation, <br /> <br />At 24035 guttevilte Road the slope failure is very similar to what occurred at the Alton Residence. <br />The scarp is up to tim deck supports and patio at the back of the manufactured home. The failed soil <br />and trees have not c~rnpletely washed away, but have downdroppad apl~oximetelV 25 to 30 feet. <br /> <br />Nembv Site <br /> <br />We have previo|Jsly worked oll a ~ failure at the nea~f Ragan residence located at 24145 <br />Bmtevilh) Road, The rlverbank failure at that site was caused during the same fleedirlg event in the <br />wit~ter of 199§. At tibet ~it~, the hame was ~::mstrueted over the ri,embank a~l ex1~rienced much <br />distress. <br /> <br />FIELD EXPLORATIONS <br /> <br /> <br />