11625 AIRPORT RD SONRISE CHRISTIAN CENTER 2022-08-25

2.0 CRITICAL AREA DETERMINATION 2.1 REVIEW OF EXISTING INFORMATION Prior to conducting the site investigation, public resources were reviewed to gather background information on the subject property and the surrounding area in regards to critical areas. The following information was examined: • USFWS National Wetlands Inventory: No wetland features are displayed by NWI within the site vicinity. • USDA-NRCS Web Soil Survey: The Web Soil Survey maps the soils on site as Alderwood- Urban land complex, 2-8%slopes.A soil description can be found in section 2.2.2 below. • WDFW Priority Habitat and Species (PHS) Interactive Map: WDFW PHS displays a wetland feature where Wetland A was identified onsite. • DNR Forest Practices Application Mapping Tool (FPAMT): DNR displays Stream A as a Type N waterbody, with water type break located at its confluence with Swamp Creek. • Snohomish County PDS Map Portal: Snohomish County displays Stream A as a non-fish seasonal stream. A wetland inventoried by the County is also displayed roughly where Wetland A was identified. • WDFW SalmonScape: WDFW Salmonscape displays Stream A as an intermittent tributary to Swamp Creek. No fish species are mapped within Stream A. The closest downstream mapped fish distribution is shown in Swamp Creek, downstream of Lake Stickney. • City of Everett Interactive Map: The City of Everett displays Stream A as an unknown-typed stream. Stream A enters a stormwater system(underground culverts) at the southern property boundary, where it remains until near its confluence with Swamp Creek,just east of Pacific Highway/Evergreen Way. A small wetland feature is shown along Stream A in the site vicinity. • DOE Water Quality Assessment: Stream A is displayed as a Category 5 and 4A water from just north of the subject property to its confluence with Swamp Creek. It is on the Category 5 list for dissolved oxygen, and the Category 4A list for bacteria. 2.2 DETERMINATION METHODOLOGY On-site wetland conditions were evaluated using routine methodology described in the 2010 Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Western Mountains, Valleys, and Coast Region (Version 2.0), (referred to as 2010 Regional Supplement). Under this method, the process for making a wetland determination is based on three sequential steps: 1) Examination of the site for hydrophytic vegetation (species presence and coverage); 2) If hydrophytic vegetation is found, then the presence of hydric soils is determined; 3) Determination of the presence of wetland hydrology in the area examined under the first two steps. Sonrise Christian Center 3 Critical Areas Study,Buffer Averaging, March 2,2018 &Buffer Enhancement Plan