2825 COLBY AVE COLBY CENTER Geotech Report 2018-01-02 MF Import

GEOTECHNICAL ENGINEERING STUDY _ . PROPOSED COLBY CENTER COLBY AND HEWI7T AVENUE EVERFTT, WASHINGTON E-6225 — INTRODUCTION .� � General This report presents the results of the geotechnical engineering study completed by Earth Consultants, Inc. (ECI) for the proposed five-story office and rPtail building at Colby and -' Hewitt Avenue, Everett, Washington. The general location of the site is shown on the '� Vicinity Map, Plate 1. �he purpose of this study was to explore the subsurface conditions at the site and based on the conditions encour�tered to develop geotechnical j recommendations tor the proposed site development. At the time our study was � performed, the site, proposed building location, and our exploratory locations were � approximately as shown on the Boring Location Plan, Plate 2. I ! ' Proiect Descrintion ' We understand it is planned to develop the site with a five-story office and retail building on the western half of the site, and street level parking on the eastern half of the site. i The building will contain two levels of beiow grade parking which will be accessed by a � ramped driveway entrance located on the northwest corner of the building. We anticipate ' the building will be of a combination of concrete and steel-frame construction with a slab- � on-grade garage floor. An excavation ranging from approximately eleven (11) to fourteen � (14) feet on the west buiiding perimeter, to fifteen (15) to eighteen (18) feet on the east building perimeter will be required to achieve the sloping floor elevations of the second Ibasement level parking area. At the time this report was written, specific structurai design information was not I available. However, based on our experience with similar projects, we have assumed wall laads in the range of six (6) to eight (8) kips per lineat foot, column loads in the range of seven hundred (700) to eight hundred (800) kips, and slab-on-grade flaor loads c�f one � hundred fifty (150) pounds per square foot. If any of the above design assurnptions are incorrect or change, we should be consulted �1 to review the recommendations contained in this report. In any case, � Earth Consultants, Inc. (ECI) should be retained to perform a general review of the final design. 1 � JEarth Consultants, Inc.