8615 7TH AVE SE Geotech Report 2018-01-02 MF Import

Subsurface Exploration, Geologic Hazard, and t St. MaryAfagdulen Snort Court Preliminary Geotechnical Engineering Report Everett, Washington Project and Site Conditions Within the limitations of scope, schedule, and budget, our services have been performed in accordance with generally accepted geotechnical engineering and engineering geology practices in effect in this area at the time our report was prepared. No other warranty, express or implied, is made. 2.0 PROJECT AND SITE DESCRIPTION This report was completed with an understanding of the project based on a preliminary design plan presented by Mr. Gordy McDonald of Gary Parkinson Architects. The project site is an existing play area that is partially paved, partially grassed, and is situated east of the existing school building and north of the existing portables. It is our understanding that the new i covered sport court will be apprnximately 70 by 100 feet in dimension. The foundation will consist of continuous footings for the support of the new cover, with some masonry units forming partial walls. We understand that the structure will be totally enclosed at some time in the future to create a gymnasium. The new flooring will be slab -on -grade concrete. The proposed elevation of the sport court slab is proposed very near the elevation of the existing basketball play area and field to its northeast. Therefore, cut depths are expected to be less 1 than 3 feet for the foundation and slab placement. The address of the property is 8615 7" Avenue SE in Everett, Washington (Figure 1). The school property is bordered to the north, south, and east by existing single-family residences, and to the west by 7' Avenue SE. Existing site topography is generally flat with shallow slopes. There are occasional elevation breaks with low, moderately steep slopes immediately south of the proposed sport court. 3.0 SUBSURFACE EXPLORATION Our field study included the excavation of three backhoe exploration pits to gain subsurface information about the site. The various types of sediments, as well as the depths where characteristics of the sediments changed, are indicated on the exploration logs presented in the Appendix. The depths indicated on the logs where conditions changed may represent gradational variations between sediment types in the field. The conclusions and recommendations presented in this report are based on the three exploration pits completed for this study. The number, locations, and depths of the explorations were completed within site and budgetary constraints. Because of the nature of exploratory work below ground, extrapolation of subsurface conditions between field explorations is necessary. It should be noted that differing subsurface conditions may April 24 2006 ASSOCIATED EARTH SCIENCES, INC. RAPhn - KE0602WAI - PMJedf1200602601KE1WP Page 2