4214 FEDERAL AVE 2018-01-02 MF Import

August 1, 2008 File No. 087-4 Peters Residence Page 4 The SCS mapping shows the immediate area to lie in the "Alderwood gravelly sandy loam, 15 to 25 percent slopes, (mapping unit No. 3)" designation. Alderwood series soils form over glacial till parent materials. Considering the geologic mapping and observed well drained sandy character of the slope soils, an "Indianola loamy sand, 15 to 25 percent slopes, (mapping unit No. 26) would be more appropriate. Geologically Hazardous Areas The City of Everett Critical Areas mapping was reviewed for the following hazard categories: 1) Landslide Hazards, (Critical Areas Map 2) 2) Erosion Hazards, (Critical Areas Map 3) 3) Liquefaction (Seismic) Hazards, (Critical Areas Ma) 4) Landslide Hazard Areas The USGS mapping shows no landslide activity in this virinity. The City of Everett landslide hazard mapping shows the subject slope as a 'low landslide hazard" classification, (slopes < 25% in other geologic units). However, the measured slope height, declivity and material composition fall within the "high landslide hazard" definition, (slopes > 40% in other geologic units). The property owner reports that no landsliding or slope wasting has occurred in the past 5 years, and that the previous owners related no accounts of such activity. Furthermore, the large mature trees on the slope indicate a long period of stability. The slope surface is uniform and shows no surface features which would indicate a history of slide activity. The positions of several large fir trees on the slope Oust below the top), indicate that no slope -top regression has occurred over the past approximate 75 to 90 years. The broken (stacked) concrete wall fronting the base of the slope shows no indication of instability, and appears to be performing well. The slope appears to have maintained a 37 degree (about 75%) surface over the past several decades. In the absence of hillside springs or concentrated surface runoff, this slope configuration is considered to be at or below the natural angle of repose for the dense, well drained slope core soils. Erosion Hazards The subject slope is shown to fall within a low erosion hazard mapping category, (City of Everett Erosion Hazard - Critical Area Map 3). However, by virtue of the wording of the city >,; ra