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Gcotechnicnl �nginecring Evnluntion <br />1303 Madrona Ave - King <br />Uccembcr 2, 2006 <br />RMI PileNo.39306 <br />Pngc 3 <br />wcre placcd eilher prior to, or during the lalcst glaciation of the Puge[ Lowland area. Glecie! ice last <br />occupied the rogion during th.: late Plcistocene epuch, some 10,000 m 13,000 ycars before the present. <br />Thc latest glncinl ndvance over the nrca is refertcd to ns the Vashon Stadc of the Prascr Glnciation, wliich <br />depasited the glacial mnterials on site. <br />Literature Revicw <br />The Gcologic Pdap of Surficinl Deposits in the Senttic 30-by 60- minute Quadrangle by Younl �[ al notcs <br />that this aren contei7s the Vashon till, Q��t, �t higher elevatimts and advnnce outtvash deposits, Qva, <br />below in the ravines and nt lower elcvations. <br />Site Conditions <br />Wc obscrved soil exposures on tltc site. fhese observations confim�ed the existenco of advance out���ash <br />depasits. <br />Hydrulogic Conditions <br />No water wns aUscrvcJ on 16e surtdcc a�d no water was obsctvcd cn tl�e slopc. <br />Slope Stf�bility <br />The core of the lot comprises glacially compacted deposits of edvance ouhv:�sh sands and <br />b�nvcls/coUUles. We did not obscrve signs of deep-seatcd slopc failures nnd would rwt expect any. There <br />were no signs of instnbility on neighboring prope�iics. <br />It is our opinion th¢t there is not a significnnt potcntiul for deep-seated slope instability. <br />Signs of bnchwasting (movement of nenr-surface soil) d�rough exposed soil erosion processes or local <br />sw�face slides are common to stecp slopes, pnrticulnrly where exposed to wcathering, such us rain, wind, <br />and freeze-thaw. 'I'here werc no perccptiUle signs of significant backwnsting. <br />RM! ASSOCIATES LLC <br />S'd SSI9-6Z9 [09E1 s1�a�cya�d �N su9tsaQ dSS�EO LO 60 �eW <br />