Project Description

This development consisted of four multi-family residential buildings each with a two-level below-ground parking garage on a site of 185,000 square feet in the City of Bellevue. The project began with demolition of a three buildings on the property—a retail space, a restaurant, and a bank. RGI was initially asked to provide geotechnical recommendations for the site and was involved in the project on an ongoing basis since that time.

RGI provided full geotechnical services for this project and construction monitoring processes during the earthwork. In the beginning of the project, RGI conducted six borings to approximate depths of 25 to 35 feet below existing site grade. These samples were tested for moisture content and grain size to aid in soil classification, as necessary to formulate foundation and shoring recommendations. In addition, RGI participated in field exploration, sent samples for lab testing, provided an engineering analysis, and produced a final Geotechnical Engineering Report.

Geotechnical challenges for this site included a steep slope on the western edge of the property that was deemed to be a landslide hazard and, thus, had to be removed during development. Max excavation was to a depth of 32 feet, which necessitated use of temporary shoring. During construction, there were issues with standing surface water, necessitating the development of drainage and surface water guidance.

Scope of Work

Scope of Work: Geotechnical Construction Monitoring, Soil Classification, Characterization of Groundwater Conditions, Pavement & Slab-On-Grade Recommendations, Erosion Control Best Management Practices, Foundation Design Recommendations, Vault Waterproofing Guidance, Design Plan Approval for Shoring & Foundation, Drainage and Surface Water Control Direction, Utility Suggestions, Field Explorations, Engineering Analyses, Sewer Backfill, Sewer Geotechnical Engineering Report, Permit Report and Consulting, Geotechnical Engineering Report. For more information on this project, visit www.carmelpartners.com/property/hyde-square/