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a <br />� <br />Gcotechnicnl lingineering Bvaluation <br />1303 Madrona Avc - King <br />December 2, 2006 <br />RMI Pile No. 3930fi <br />I'ngc 2 <br />3. Provide recommendations for stripping nnd grading, building setbacks, fcundation <br />placement, bcaring pressures and enrthwork. <br />4. Provide � geotechnical report discussing ocr findings, opinions and recommendations for <br />the planncd constroction as npplicable [o this projec[. <br />EXISTING CONDITIONS <br />Gcncrvl <br />We reviewed thc general geologic and slope stnbiliry conditions of the sitc, which are shown on the <br />Geologic Map of Surficial Deposits in Uie Senttle 30- by 60- minute Quadrangle, Wnsl�ington by Yount, <br />James C. et al (USGS, 19931. The site area, slnpe profile, ohscrvcd conditions, exisling fcatures, enJ <br />propused building addition are shotvn on ihe enclosed Site Pimi (Pigure 2) or Schematic Cross-Section <br />�1-A' (Figure 3). <br />tiurfxcc Conditions <br />'Phe new construction is to replace the existing home and garage. 'I'hc ucw dcck on thc ��ater side nf the <br />home will be set back nbout 55 feet from the top of t6c steep slope fmd the house itself �vill be no closer <br />thnn 70 feeL 1'he existing lawn is tercaced and slopes down at behvicen I 1 nnd 15 degrees to the lop of <br />dte slopc. Tl�e bluCf itsclf slopes do«�i at bchvecn 32 nnd 3G degrees to the railrond right-of-wny nnd is <br />about 30 feet high. "I'he genernl sitc cond+tions, slope gwmetry, and our inte!premtion of existing <br />conditions within diis arcu are sho�m on the enclosed Site Plan in Figure 2 mid thc Schematic Cross- <br />Section in Figure 3. Thc Cross-Section wns constnicted fiom mcasuremeuts tnken on the sitc with n <br />digital Icvcl nnd a t�pc. <br />Dnsed on crposures thc onsite soils were classified us ndvance ouhmsh deposita of sand and grnvcl. <br />1'he bluff is covered with blackberq� bushes. l'here nre mediwn hcight flldcrs near the toe. There are no <br />signs of decp-seated fnilures on diis mid ndjoining properties but thcre have bccn surficinl slides in thc <br />past on this and on ncighhoring properties. <br />Gcologic Conditions <br />LanJfonns within this region comprise n system of glncially sculptured featiu•es, which have been <br />cxposed by post-glacial erosion. Locally, thc tcrrnin of this area has Uccn glacinlly modified. Tiie soils <br />RMI ASSOC/ATES LLC <br />b'd 6ST9-6Z9 109E1 sqoa:iyo�� mN su2tsaQ d5S�E0 LO 60 JeW <br />