4326 CRESCENT AVE 2025-07-14 - Laserfiche WebLink

In Test Hole T 1-1, Located along the eastern (downhill)end of the site,we encountered 3A feet of old fill soils consisting;of moist,loose to medium dense, reddish-orange and dark brown silty sand with n-dnor amounts of gravel, roots and topsoil. Below 3.0 feet, we encountered Native, moist,light brown sand with silt consistent with.Advance outwash_ In Test Hole TH»2,located along the western (uphill) caul of the site.on tltc StCCjI slope, we encountered 4.¢ #eet of old Call soils consisting of moist, medium dense, tan silty sand with gravel and minor amounts of roots and.topsoil. Below 4A feet, we encountered native, moist, light brown sand with silt consistent with Advance Outwash. In general, the Advance Outwash was predominantly composed of medium-grained stand and was weathered to a medium dense condition in,the up0e11 portions. The dense, unweathered .Advance Outwash was encountered.at depths ranging -from 7A to 8.0 feet below surface grades. figures At1 and A-2 present more detailed descriptions of the subsurface conditions encountered in the test holes. The approxiihate test hole.locations are shown on the Exploratign Location Plain provided in.Figure 2, 3.4 Groundwater We dirt not encounter groundwater seepage in any of the test Boles excavated on the site. However, we ox' ect.a seasonal perched water table likely develops beneath the site at tunes during-the Nvet winter months. The groundwater levels and flow metes will fluctuate seasonally and typically reach their highest levels during and shortly following the wet winter months (October through May). e 4,0 GEOLOGIC HAZARDS 4.1 Landslide i. According to Chapter 19.37.080 in the City of Everett Municipal Code (EMQ landslide hazard areas are defined,es follows: "a. Those areas deEated as High'and very higltlsevere risk of landslide hazard in the;Dai es and Moore Methodology:for the Inventory,Class at and Designation of Geological ly Hazardous Areas.City ofEVcKtt,Washington,,July 1, 1991,or as revised through best`available science: i' (1) Very high/severe:slopes greater than fifteen percent in the Qtb,Qw,and Qls geologic units;- and slopes greater than fifteen percent with uncontrolled fill. I (2) High:slopes greater than forty percent tn.all.other geologic Units(not Qtb,Qw,and Cols or uncontrolled.fill). b. Those areas defined as niulittm risk.of landslide hazard in the Dam k and Moore Methodology for Jnventory,.C:lassi ication and Designation of Geolo,iea1ly Naza does Areas, City of Everett,Washington-July 1, 1991,or as revised through best available science,when .:' combined with springs:or seeps,immature vegetation,and/or no vegetation: (!) ;;lopes.less than fifteen percent for Qtb,Qw,anal Qls geologic units and uncontrolled till. 'ttgc Ago Ungineeruig,LIA' I 3 = 2S3.8AS•�[t04 't'