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Marlene Bissell 10-Unit Condo's <br /> Drainage Report <br /> Section 5 - Erosion Control Risk Assessment <br /> General Description <br /> This section of the report is to look at potential risks of erosion to the surroundings associated <br /> with construction and post-development characteristics. <br /> Location of Critical Areas and Protected Resources related to the Project <br /> Project iswithin the 100 foot buffer of a Type F stream. <br /> Risk to Fish Bearing Streams or Waterbodies from Proposed Construction <br /> With adequate measures for erosion control proposed for this project, downstream waters should <br /> not be adversely impacted. <br /> Slope, Soil Type, and Relative Risk of Erosion During Construction <br /> The soil type on site is Alderwood Urban Land Complex, Hydrologic Group C. The hazard of <br /> erosion of Group C soils is considered to be moderate to high. The slopes on the site average <br /> about 2-5 percent, which is considered to be a moderately low risk for erosion. <br /> Potential for Slides or Ground Movements <br /> There are no hazardous slide areas on or bordering the project site,therefore,there is a low risk <br /> of erosion. After construction,the exposed surfaces will be permanently covered and will <br /> provide stability to the sloping site. <br /> Sources of Water other than Rainfall <br /> The site is essentially a plateau with no significant upstream flows onto the site. <br /> Percent of Site Left Vegetated <br /> A few of the second grow trees within the northeast corner of the site could feasibly be <br /> undisturbed. Vegetation within the stream buffer will be undisturbed. <br /> 6 <br />