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a s s o c i a t e d <br />earth sciences <br />i n c o r p o r a t e d <br />July 1, 2022 <br />Project No. 20180614EO01 <br />Adam Kierstein <br />5814 25t" Avenue West <br />Everett, Washington 98203 <br />Subject: Geotechnical Engineering Report <br />Kierstein Residence Retaining Wall Replacement <br />Everett, Washington <br />Dear Mr. Kierstein: <br />This letter -report summarizes the findings of the subsurface exploration and limited <br />geotechnical engineering study recently completed for the above -referenced project. Our work <br />has been completed in general accordance with our proposal dated January 16, 2019, <br />discussions with you, and in accordance with generally accepted geotechnical engineering <br />practices. This letter -report was prepared for the exclusive use of Mr. Adam Kierstein and his <br />authorized agents, for specific application to this project. No other warranty, express or implied <br />is made. <br />SITE AND PROJECT DESCRIPTION <br />The site is an existing single-family residence located at 5814 25t" Avenue West in Everett, <br />Washington as shown on the "Vicinity Map," Figure 1. The lot is comprised of a relatively level <br />portion where the residence is situated in the eastern two-thirds of the property, and a west- to <br />northwest -facing slope within the western third of the property. During our initial site visit in <br />2018, two 4-feet tall terraced segmental block walls were situated at the top of the slope <br />extending from the north to south property lines. We understand you observed the walls were <br />out of alignment following removal of vegetation from the area of the walls after you had <br />purchased the home. In early 2022, we understand that the lower wall failed and wall <br />replacement is time sensitive. <br />The slope is approximately 38 feet tall from the top of the uppermost wall to the western <br />property limits and is inclined at greater than 60 percent. The slope continues to drop down to <br />the west at similar inclinations over a vertical elevation drop of approximately 15 feet relative <br />to the northwest corner of the property. City of Everett Critical Areas Maps 2 and 3 indicate the <br />western sloping portion of the property is classified as landslide hazard and erosion hazard <br />critical areas, respectively, due to the inclination and height of the slope and the type of soils <br />exposed on the slope. Currently, the slope is completely vegetated with young to mature <br />Kirkland I Tacoma I Mount Vernon <br />425-827-7701 1 www.aesgeo.com <br />