4910 27TH AVE W 2018-01-02 MF Import

Mr. Elmer Johnston March 26, 1990 Page Two Soils Hydric soils are defined as soils that are saturated, flooded, or ponded long enough during the growing season to develop anaerobic conditions in the upper part of the soil profile (USDA, SCS, 1987). The Soil Conservation Service (SCS), in cooperation with the National Technical Committee for Hydric Soils (NTCHS), has compiled a list of hydric soils in the United States. The list identifies soils series mapped by the SCS that meet hydric soil criteria. Hydric soils exhibit certain characteristics due to wet, anaerobic conditions that can be observed in the field. Such characteristics or indicators include: high organic content, accumulation of sulfidic material, greenish or bluish grey color (gley formation), spots or blotches or orange color (mottling), and dark soil colors (low soil chroma). A soil auger was used to investigate the soil characteristics present in locations throughout the site in order to determine whether hydric soils exist on the site. Hydrology Water must be present in order for wetlands to exist; however, it need not be present throughout the entire year. Wetland hydrology is considere< to be present when there is permanent or periodic inundation, or soil saturation for significant period (usually a week or more) during the growing season (Federal Interagency Committee for Wetland Delineation, 1989). Indicators of wetland hydrology include: areas of ponding or soil saturation, evidence of previous water inundation (such as dry algae on bare soil, high water marks, and matted vegetation), and drainage patterns. Where positive indicators of wetland hydrology were observed, it was assumed that wetland hydrology occurs for a significant period of the growing season. The property is located on the south side of 27th Avenue West. it is approximately 150 by 140 foot in size, and slopes from east to west. The northern half of the site contains a garage and a house. The property slopes from the base of the house down to the west. The slope contains a landscaped timber staircase and is planted with a cotoneaster ground cover. Below the landscaped area, the western portion of the site is maintained as a lawn. Soils and Hydrology The soils on the property are documented as Alderwood gravell sandy loam, 15% to 25% slopes, and Alderwood-Everett gravelly sandy loams, 25% to 70% slopes. Both