2610 VIEWCREST AVE 2022-04-13 - Laserfiche WebLink

McCann Property .Geological Assess>nelit Report 2610 Viewcrest Avenue, Everett, Washington The subject parcel slopes gently from the south to the north. Relief on the property extends from approximate elevation 386 feet along the south property line to 274 feet along the north property line or a gradient on the order of 8 percent. Single family residences border the parcel to the east, west and south. Viewcrest Avenue is to the north with single family residences north of the street. Subsurface Exploration In order to confirm subsurface conditions on the property a series of 4 exploration pits were excavated on the property on March 23, 2019. Logs of the exploration pits are attached with this letter. The location of the pits is shown on the attached site plan. All of the explorations encountered sand with silt to silty sand. Most of the sand was fine to medium grained but medium to coarse sand was observed in EP-1 and EP-2. The soils ranged from loose to medium dense to dense. Much of the loose soil may be related to past clearing and minor grading of the property. Mappings According to the Preliminary Surficial Geologic Map of the Mukilteo and Everett Quadrangles, Snohomish County, Washington, by Mackey Smith, 1976, Washington Department of Natural Resources,Division of Geology and Earth Resources, the site is mapped near the contact between as Vashon age advance outwash deposits, (Esperance Sand (Qe) and Vashon age glacial till (Qt). Our explorations agree with the published geology map of the area as we did not encounter any glacial till, but the underlying dense, sand and silty sand would be identified as Esperance sand. Seismic Hazards The site slopes are gentle (8 percent slope gradient), are underlain by glacially consolidated sediments. The site does not meet any of the criteria of a seismic hazard as per Chapter 19.37.080.A. The site is not mapped as a seismic/liquefaction hazard per the Dames and Moore Methodology for the Inventory, Classification and Designation of Geologically Hazardous Areas, City of Everett, Washington, July 1, 1991 and no areas within 200 feet of the property are mapped as a seismic or liquefaction hazard. The site is not mapped as high or moderate to high liquefaction susceptibility on the Liquefaction Susceptibility Map of Snohomish Count, Washington, Washington State Department of Natural Resources, Palmer, Stephen, et al., September 2004 and no areas within 200 feet of the property are mapped as a liquefaction hazard. Gary A.Flowers,PLLC. 5205 23'Avenue W Everett,Washington 98203 206-819-4304