HWA provided geotechnical engineering services in support of a new stormwater and CSO conveyance system along the Everett Waterfront. HWA and the design team developed an innovative solution that included the construction of a utility bridge to carry a CSO, water main and storm drain line from the top of the slope to the waterfront. This project was the winner of the 2023 AIA Seattle Honor Awards - Award of Merit and the 2023 American Architecture Award for Bridges and Infrastructure.

HWA provided geotechnical support for the Northgate Pedestrian Bridge that connects North Seattle College to the Sound Transit Station near Northgate Mall. An extensive series of geotechnical borings were completed in coordination with WSDOT to obtain soil information for each of the 17 pier locations. HWA was retained to provide services throughout construction and this project was the winner of the 2023 APWA Project of the Year Award for best transportation project with a budget of $25-75M.

HWA provided geotechnical support for the 33rd Avenue Pedestrian Bridge in Seattle, Washington. HWA’s tasks included site reconnaissance, field explorations, installation of groundwater monitoring wells, laboratory testing, settlement analyses, and design and construction recommendations for the replacement bridges and associated retaining structures for rehabilitation. HWA coordinated with community members, Seattle Parks and Recreation, and BNSF Railway Company.