11229 19TH AVE SE SILVER LAKE TOWNHOMES WHOLE SITE Geotech Report 2022-10-25

GEOTECHNICAL REPORT PROPOSED DEVELOPMENT 11229- 19TH AVENUE SE EVERETT,WASHINGTON 1.0 GENERAL As requested, PanGEO, Inc. is pleased to present this geotechnical report to assist the project team with the design and construction of the proposed development at 11229 - 19th Avenue SE in Everett, Washington. This study was prepared in general accordance with our mutually agreed scope of services outlined in our proposal dated January 9, 2016, and was approved by you on August 2, 2016. Our scope of services included reviewing readily available geologic and geotechnical data, drilling four test borings, conducting a site reconnaissance, performing engineering analyses, and developing the geotechnical design recommendations presented in this report. 2.0 SITE AND PROJECT DESCRIPTION The subject site is located at 11229 - 19th Avenue SE in the Silver Lake neighborhood of Everett, Washington (see Vicinity Map, Figure 1). The project site includes three separate parcels: parcel numbers 00574700101902 and 00574700101907 at 11124 - 23`d Drive SE, and parcel number 00574700101903 at 11229— 19th Avenue SE. The approximately boomerang-shaped site extends about 500 feet in the east-west direction and about 100 feet in the north-south direction and has a total area of about 58,228 square feet. The subject site is bordered to the north and south by existing residences, to the east by a vacant lot, and to the west by 19th Avenue SE (also known as State Route 527, Bothell Way, or Bothell-Everett Highway). A one-story residence and three sheds currently occupy the site (see Plates 1 and 2, following page). An asphalt drive way leads to the existing house and nearby shed from 19th Avenue SE, and a gravel path leads to the other 2 sheds and provides access to the existing home from 23rd Drive SE. A gravel lot which formerly contained a mobile home is present in the center of the site, and a small hill and wetlands occupy the eastern portion of the site. The remainder of the site is covered with tall grasses, shrubs, and cedars, firs, and maple trees. The site gently slopes down from the east to the west with an elevation difference of approximately 30 feet, or an average gradient of about 6 percent. We understand that the proposed development consists of demolishing the existing structures at the site and constructing five multi-family buildings, including two 4-unit buildings, two 3-unit buildings, and one 2-unit building (see Figure 2). Based on a review of the preliminary design 16-210 11229 19th Ave SE Rpt Page 1 PanGEO, Inc.