920 MILLWRIGHT LOOP S BASE FILE Geotech Report 2023-12-29

1.0 INTRODUCTION This report presents the results of GeoEngineers Inc.'s (Geolingineers') geotechnical engineering and rigid Inclusion ground Improvement design services for the proposed development at Parcel A17 as part of the Port of Everett Waterfront Place Center project in Everett, Washington (Figure 1). We understand that the proposed development at Parcel A17 includes Me construction of a restroom and retail building approximately 600 feet west to the Intersection of Seiner Dave and 14' Street, along the bulkhead parallel to 14r^ Street at the Port of Everett The existing bulkhead adjacent to Parcel A17 consists of a sheet pile wall with tiebacks connected to a continuous concrete deadman. Based on the review of available geotechnical Information and our project experience at the site/within site vicinity, the lateral spreading caused by soil liquefaction at the site tends to have significant impacts on the bulkhead structure; and thereby, impact the planned foundations and building at adjacent properties. To support the new construction of the restroom and recall building at Parcel A17, the ground Improvement with rigid inclusion is considered as the foundation support for this project. The objectives of GeoEngineem' geotechnical engineering and rigid inclusion ground improvement services are to provide PND Engineers, Inc. (PND) (project structural engineer) geotechnical seismic design criteria, foundation recommendations in support of tire building design and construction at Parcel A37; and develop a ground improvement design consisting of rigid inclusion elements to mitigate the lateral deformation of the building foundations for the proposed new building to meet the building code criteria. 2.0 SITE CONDITIONS The site conditions were evaluated by reviewing the available geotechnical, geological, groundwater within the site vicinity, and design and construction information for the existing bulkhead along Parcel A17. The related documents that we reviewed included the following: iii "Report of Geotechnical Investigation for Pont of Everett North Marina Bulkhead Everett. Washingtoq" prepared for Pont of Everett, by UPS, dated December 30, 2002. "Port of Everett 14r^ Street Bulkhead Replacement; prepared for Port of Everett, by Reid Middlemn, dated February 7, 2005, "Ecology Review Draft of Data Gaps Investigation for North Marina Redevelopment Site, Everett, Washington," prepared for Port of Everett by Landau Associates, dated May 13, 2005. iii "Report of Geotechnical Engineering Services for Proposed Phase 1 Site Infrastructure North Manna Redevelopment, Everett, Washington," prepared for Pont of Everett by Landau Associates, dated August 28, 2006. iii "Geotechnical Report 14t^ Street and 16U, Street Manna District East Marina Bulkhead Replacement, Everett, Washington," prepared for Pont of Everett, by Shannon & Wilson, Inc., dated January 31, 2014. "Port of Everett Everett Shipyard Site Sediment Cleanup and Centml Marina Improvements - Phase I (100%Design Drawings for Permit)," dated March 7, 2014, "Concept Design Submittal- Geotechnical Report: Repair South Marina North Wharf and Landing North Wharf," prepared for Port of Everett, by Reid Middleton, dated July 2014. GEGENGINEEkS.0 D=Mr20 202 o1 Note 1