City of Clarkston Bridge/Diagonal/2nd Street Roundabout HWA is proud to have provided materials testing and inspection services alongside Keller Associates Inc. , for the City of Clarkston Bridge/Diagonal/2nd Street Roundabout Project. For years, the intersection of Bridge Street (US-12), Diagonal Street, and 2nd Street was Clarkston’s most dangerous and congested location. Five legs converged at a signalized intersection plagued by long delays, confusing traffic patterns, an

Photo courtesy of ACEC Spotlight on the 2026 ACEC WA Engineering Excellence Awards National Silver Winner in the Transportation Category! HWA is proud to have provided geotechnical and geoenvironmental services as part of the HDR team for the City of Bellevue’s 124th Avenue NE Corridor Improvements which was the winner of the 2026 ACEC WA Engineering Excellence Awards National Silver – Transportation Category! Corridor enhancements include state-of-the-art bicycle/pedestrian

LinkedIn Article - 2026 ACEC WA Engineering Excellence Awards State Silver Winner HWA is proud to have provided material quality acceptance testing to support the CM Services for Runway 14L-32R for King County International Airport, led by DOWL , supporting one of the busiest general aviation airports in the country. This critical runway and several taxiways were in serious need of repair, having worn out pavement, outdated lighting, and a layout that didn’t meet modern safet