3829 SHORE AVE 2018-01-02 MF Import

As ahown on the enclosed location/geologic map cross section of the slope area. the apparent contact between the Double Bluff and Whidbey Formations apparently dips toward the west at approximately 5°-10°. The sand and eand/silt interbeds within the Wnidbey Formation also apparently dip at aimilar angles, indicating some tectonic activity. Overlying the Whidbey Formation is a variably thick c�equence of Vashon Age glacial deposits� including glacial till and associated glacial outwash . These materials are generally thin Nithin the im estigated areas as indicated by the borings. In fact, the Vashon age materials were generally not encountered along the slope area except for two general areas (approximate STA 25+00 and 38+00), where the asaociated glacial outwash materials were � encountered. i Alluvial soils� consisting of recently deposited silts, sands ' and gravels, artificial fill and talus/slide debris. occur eporatically throughout the site . The upslope area was Pound to consist of some local Yilling,particnlarly within the depression area noted on the location map. Considerable talue and slide debris occure along the toe-of-slope, derived from the upslope. Publiahed informationt regarding the geology of the subject etudy i area generally supports our interpretation of the geologic condi- tions which prevail in the area. AIR.,PEffiT03 _ I Stereoscopic pairs of air photos taken in 194y, 196� and 1981 I wer.e studied. Generally. we found that development within the area had begun and was about 60J developed by 194�. By 1967, approximately 80� oS the area had been developed and by 1981, 95�b of the area had been developed into single Samily housing. Some of the residences present during the early photcs have been replaced. remodeled or added onto by the latest photos. � � Mackey S�ith, Preliminarv surficial �eologic map of the Mukilteo & Everett quadran�les, i Snohomiah Co. , Wash. Washington State DNR � Geologic map G.N-20. 1976 ; I •-4- �