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Correspondence G� ryeS - I too 7 11864 ASPEN RIDGE; DRIVE (duplicate,/unable to locate original,— ( /)rN/UR .Tnannn 'P- — i Page No. 1 LOG NOTES FOR CASE NO. : MST94-9117 LINDA ELLIOTT 11864 SW ASPEN RIDGE DR. 01/26/98 by Date Text of log note JT 01/26/98 1/26/98 Linda Elliott (590-2158-w) callal wanting information on soils reports/engineering etc . for this address . I faxed her a. .report from Squier Associates to City Administrator, dated February 4, 1993, Information was req.-.?.ding slope stability and erosion control for Aspen Ridge (a portion of letter states "In the letter, John McDonald expressed an opinion that the earth fill on Aspen Ridge subdivision, including the earth fill on lo:,s 39-44 is stable and suitable for the intended usage" . T also faxed her copies of building inspections . I could not locate the original file folder in records room. I made a copies of file from Dee ' s microfilm. One copy of file I put in the Records Room, one copy T requested Dee put in the records room VAULT, as this may become a "sensitive" file . Jeanne T. SQUIER ASSOCIATES GEOTECHNICAL 6: 4260 Cialmo«dStreet 503+35 4419 GEOENVIItoNMENTAI_ Post Office Box 1317 Las 635.1430 CONSULTAN TS Like Oswego,Oregon 97035 1 92698 City of"Tigard I March 3, 'i 993 Y 13125 S,W. Hall Boulevard I MAS p P.O. Box. 23397 I�[�—� J Tigard, Oregon 97223 ULIt_1� -' Attn: Mr. Patrick Riley, City Administrator Re: Aspen Ridge Issues: February 4, 1993, Meeting Dear Mr. Riley: A meeting was held in your office on Thursday, February 4, 1993, in order to discuss two pri- mary issues, among a- -ral others, with respect to the Aspen Ridge subdivision: namely, 1) slope stability, and 2) final erosion control plan. In attendance were representatives from the City; OTAK; Larry Rosencrantz, the developer; and adjoining property owners. The discussion focused on Lots 39 through 44, which are composed of man-made fill, up to 30 to 32 feet high (maximum). The writer's comments are as follows: Slpe Stability. A review of John McDonald's engineering report dated January 13, 1993, was completed prior to the meeiing. The report was prepared to address Section 7006(e), Chap- ter 70 (Uniform Building Code), which requires that the soil engineer of record express "opinions and recommendations covering the adequacy of sites to be developed by the proposed grad- ing, including the stability of slopes". In the letter, John McDonald expressed an opinion "that the earth fill on Aspen Ridge subdivision, including the earth fill on Lots 39 through 44, is stable and suitable for the intetided usage". Before accepting the letter, the writer reviewed the standard of practice for similar fills/se.ting3 with two principals in other geotechnical engineering firms. The general consensus is that local practice would allow a statement on stability and suitability without strength testing per se, based upon experience with comparable fills, with 2HA V sideslopes; and on suitably prepared subgra.des. Accordingly, it is the writer's opinion, that John McDonald's letter should be ac- cepted by the City as satisfying the intent of Chapter 70. �I i ... II 4ulErt AL5S°CIATES have been provided for the fill slopes These additional control features Dining properties. and will be l-additional erosion adj ovary, °lan. water and silt onto are temp allow• Control ,____ the features Erose— movement of Some of and ground cover in order tc control the , and i 5. 993) as weather She 3, 1?_ spring ( a network °f ternoorary! are shown on during the p and features Cenewed straw cover; rovements storm sewer. converted to final imp includo silt 1enc�' an existing The additional features The di the`4111 drain into for ditches. \�eS that the measures pro- permanent inte,cep and bell© table degree. rovided, � .,� to an accep d the additional features p oft and 'E"c'"l`' revlewe ronirol rUn - because of concentrations Ttle writer has should - continues become more ted arra prudent and continue to posed and adopted efSort if erosion should should uire renewed opinion, u areas may ren The hydlc.seeding in :hE writers �an- Locally, Som expected. the City, letter dated this should be p In summary OTA , 01 runotf, and rowth �''.'lcle occurs. as propo`ed in the s ring y drainage effective as the p control and Plans for eresion S S, arc,,.I the p e trencheS, 18, 1993. I for the drainag would uary that is a deta� surface run pTAK, andback,,,," ck,,,, more Percent pass should be reviewed by of native r;�aterial for ba not more than 2 p but One ChangeIn lieu rur over time, Sheet 15 r� an washed sand, i.e., C' shown on of sand may °C� e slope. and C� backfill consisted � inf,itraUon into the runoff orr th be intercepted it the Some fines ting my t`-,a No. 200 sieve wet sieve) native backfill in intercepting he sand �Nould ren more effective than the this "'me' © tr lst the foregoing viePts your needs Very truly yours, Squier Associates, Inc. byAV&SC,Palle president LVASIes ,♦ v \ MS/ DE L AV 1 / �' '�•a o 9871( a.9eM Y \7 e �j .511 7T11 1w (/` g AY :5000 x ��/� J� 'Q' `v' Y .4IF h r— 14YA j $ ,.�V• j.•+�yr _ J'y '�^95711 to IL rn SN 9.'MI AY lip; `� { �tk.,.t, • J. ,{1, ;TIIIITfp 915 „�„ �• I •ay SM 90TH ^I lY E ISI ct�� ounm e.r off- � I N aDr ess c 6,111. 17 o910 r tror� la000 s„) Bwll I +G I 12.054 V,c .jcr254 0. 1 �.' 12000 12.o17- I S w vi t.•i trot 11988 11981 v a -4 a I IIg82 119�q 11980 jl9�;t 119 bo , Ilg5 II` 11�� a I \ �4 a I I 11959 u a i I 1194y IIg3� II°12.0 1192 1 _I 11938 11133 11926 11115 11ga04 I 1190) I I+ Ilo 119 15 -v ,r 11902- ! 11 qc3 1187?- 118 3 11882. 1188 70 ~ + I S 11033 11b 39 — 11$1.414 I,, 118 1 rp VI � W OD wi N �iwtic I a`