5700 23RD DR W 2016-01-01 MF Import

� Igeology practices in effect in this area at the tune our report was prepared. No other warranry, expressed or imp�ied is made. It must be understood that no recommendations or engi�ering ( design can yield a guarancee of stabla slopes. Our observadons, findings and opinions are a means � to identify and reduce the inherent risks to the owner. , �0 PRO�'GT ANi� .CITA D�C�$jpSjQj� I This report was completed with an understanding of the project based on discussions with Mr. Randy Blair of W&H Pacific and our review of the Preliminary Binding Site Plan provided by W&H Pacific and dated October 29, 1997. Present plans call for subdividing the 45 acre pazcel Iinto 6 lots in prepazation for commercial development. The proiect site is located on the north end of an upfand olateau that overlooks Possession Sound, i southwest of Everett, Washington. The parcel is bounded on the east and west by two steep, north-trending drainage ravines. The eascern drainage is identified as Narbeck Creek on an I undated topographic map provided by W&H Pacific. 13e western drainage was termed East Fork of Powder Mill Creek on the topograpluc map. Both of N•�se drainages contained surface flow a[ the time of our field reconnaissance. ; Topographically, the upland portion of the site was characterized by gende north-facing slopes, with overall gradients of about 5 to 10 percent. Slope gradients in excess of 40 percent were � limited to areas adjacent to the drainage ravines along the east and west sides of the site. Elevations on the upland plateau ranged from about 457 fcet along the southeast oroperty boundary to 395 feet in the northwest corner of the site. IThe project site is wooded and undeveloped. Vegetation consisu of a mixture of inedium to lazge deciduous and evergreen trees in the upland areas with a moderau to dense underbrush. The ` ravines are covered with cottonwood and alder uees, and scattered cedar trees, with a dense undercover of vines and brush. The properry was bounded by residential development to the north � and west. A north-south trending udliry easement bisects the property. The easement is 30 fcet wide and currendy provides access for a sanitary sewer pipeline. i i Nazbeck Creek, located on the eastem side of the properry, is characterized by steep ra.iue side � slopes. Cut bank and stream bank slope failures exposed geologic units consisting of glacially consolidated medium to coazse sand with gravel in the upper (southem) reaches of the ravine. Exposums in the lower(northem) reaches of the ravine consist primarily of glacially consolidated � fine to medium sand with thin(1 inch) interbeds of silry fine sand. Minor seepages were observed emanating from the exposed sand and gravcl uniu and generally increased downstream. The stream channel is generatly covered by gravels and cobbles. Boulders are also scatured along t2u Ichannel. The channel is also characterized by a sigaificant azno�nt of woody debns. The cumbination of logs and ',-,oulders form a series of natural sediment traps on ttx upsu�eam side of these obs�uctions with small "plunge" pools downstream of the obstrucdons. �' 2 �