2824 GRAND AVE NAUTICA CONDOMINIUMS 2018-01-02 MF Import

GEOTECHNICAL ENGINEERING STUDY PROPOSED FIVE -STORY APARTMENT BUILDING HEWITT AVENUE AND GRAND AVENUE EVERETT, WASHINGTON E-8602 INTRODUCTION General This report presents the results of the Geotechnical Engineering Study completed by ECI for the proposed five -story apartment building located northwest of the intersection of Hewitt Avenue and Grand Avenue, Everett, Washington. The purpose of this study was to explore the subsurface conditions at the site, and based on the conditions encountered, develop geotechnical recommendations for the proposed site development. The general location of the site is shown on the Vicinity Map, Plate 1. Project Description A schematic representation of the property, and our exploratory locations are approximately as shown on the Boring and Test Pit Location Plan, Plate 2. We understand construction of a five -story apartment building with a below grade parking level is proposed for the property. The below grade parking level will daylight along the west side of the building. The building footprint of the proposed development will occupy the majority of the property. The Burlington Northern train tunnel right-of-way passes from east to west through the central portions of the site. Based on a recent survey of the prooerty, it appears the crown of the tunnel is located approximately ten (10) to twelve (12) feet below the existing ground surface elevation. The building foundations will need to be designed to limit building load influences on the train tunnel structure. Based on existing grades along the approximate alignment of the tunnel, it appears cuts of approximately two feet to four feet will be necessary to achieve design grade for the parking level. Removal of these soils will effectively reduce the magnitude of soil overburden currently influencing the crown of the tunnel. Evth CO..Uft& -. Ina