9506 7TH AVE SE 2025-04-08 - Laserfiche WebLink

The soils underlying the site are mapped by USDA-NRCS(Web Soil Survey)as Alderwood-Urban land complex, 2-8% slopes. This soil description matched the soils found during the July 2022 investigation. Aldenvood-Urban land complex, 2 to 8 percent slopes is described as consisting of about 60 percent Alderwood gravelly sandy loam and about 25 percent urban land. Included in this unit are small areas of McKenna and Norma soils and Terric Medisaprists in depressional areas and drainageways on plains.Also included are small areas of soils that are very shallow over a hardpan; small areas of Everett, Indianola, and Ragnar soils on terraces and outwash plains; and soils that have a stony and bouldery surface layer. Included areas make up about 15 percent of the total acreage. The Alderwood soil is moderately deep over a hardpan and is moderately well drained. It formed in glacial till. Typically, the surface layer is very dark grayish brown gravelly sandy loam about 7 inches thick. The upper part of the subsoil is dark yellowish brown and dark brown very gravelly sandy loam about 23 inches thick. A weakly cemented hardpan is at a depth of about 35 inches. Permeability of this soil is moderately rapid above the hardpan and very slow through it. Available water capacity is low. 2.2.2 Hydrology Criteria Wetland hydrology encompasses all hydrologic characteristics of areas that are periodically inundated or have soils saturated to the surface for a sufficient duration during the growing season. Areas with evident characteristics of wetland hydrology are those where the presence of water has an overriding influence on characteristics of vegetation and soils due to anaerobic and chemically reducing conditions, respectively. Additionally, areas which are seasonally inundated and/or saturated to the surface for a consecutive number of days >_12.5 percent of the growing season are wetlands, provided the soil and vegetation parameters are met. Areas inundated or saturated between 5 and 12.5 percent of the growing season in most years may or may not be wetlands. Areas saturated to the surface for less than 5 percent of the growing season are non-wetlands. Field indicators are used for determining whether wetland hydrology parameters are met. 2.3 WETLAND AND STREAM CLASSIFICATIONS 2.3.1 Cowardin System Classifications The wetland and stream classifications on this site according to Classification of Wetlands and Deepwater Habitats of the United States(Cowardin 1979), are as follows: Wetland A: Palustrine, Forested Wetland, Broad-leaved Deciduous, Seasonally Flooded Stream A: Riverine, Intermittent, Streambed, Mud 2.3.2 City of Everett Classifications Pursuant to EMC 19.37.090(C), wetlands are classified according to the Department of Ecology's (DOE) Washington State Wetland Rating System for Western Washington: 2014 Update (Hruby 2014). As described in EMC 19.37.160(A), classification of streams shall be established in accordance with the water typing rules contained in WAC 222-16-030. Protective buffers are assigned to wetlands and streams based upon these classifications, as provided in EMC Chelsea Heights 5 Critical Area Study &Buffer Enhancement Plan WRI#22101 October 10, 2022