2601 E GRAND AVE 2016-01-01 MF Import

i . / . �', , . � naqe Thrae . � �$�rry. 71 rotted stump was found near the aouth proparty line. 4: The remaining easterly portion of the aite ia veqetated with willow and amall alders, with an undaratory of skunk cabbage, and hardhack, .breekinq into looseatrife and cattail where water atands. Soils and Geoloqy: The geoloqic hiatory of the aite is interpreted as follows: � 1 : Proqlacial outtrash sand waa dapositad in a atructural baain. 2: The dapoeitionel enerqy was reducad posaibly due to ice damming, and a aequence of ailt wns deposited overlying the aand. 3: Tha qlacier ovarrode the pervioua sedimenta, compecting them and depositinq a sequence of lodqament till. 4: Followinq deglaciation and cruatal rabound, the Snohomish River eroded � the previous depoaits, forming the sideslope. 5: Floodplain sediment wae deposited along the base of the alope, and organiC aoila were depoaited in depressions. • . 6: The lo8gement till weathered into looae qravelly sandy loam, 7: The upper terraca was later cleared, and fill was sidecast alonq the sideslope. � 8: Sidecast fill became saturated, and alumped to a toe at the base of the sidealope. 9: Loose weathered soils continued to creep down the �'_opa at a very slow rate. • oils encountered on the site qenerally agreed with the U.S.D.A. ap, with the exception of the underlyinq ailt and sand units, owever the silt unit was mapped in the vicinity. he steepness of �the ravine can be attributed to the stratigraph- � c sequence of loose sand underlying progressively more competent oils and the potential for scour and undermining at the base of I he slope. oils encountered in the proposed building area were qenerally ry, and tended to grade compact to hard at depth. • ndications of soil movement as encountered in our investigation ave been located on the attached map psge as feature locations, nd are described as follows: 1 � i � E�ara a,v�crsis —/ �