St. Croix River Crossing

COWI North America and HDR

St. Croix River Crossing

Oak Park Heights Minnesota to St. Joseph, Wisconsin  

The St. Croix River Crossing not only balances environmental and stakeholder concerns, it provides increased capacity to 55,000 vehicles a day between Minnesota and Wisconsin and significantly reduces delays. The largest public works bridge project in state history, it is the longest extradosed bridge in the United States, crossing the federally-protected "Wild and Scenic" St. Croix River. COWI, together with HDR, were responsible for the main river bridge and associated bridge approach design. The extradosed bridge form, which combines segmental box girder and cable-stay bridge technology, is unique in optimizing environmental and visual footprints while being sustainable and constructible.

Press release
Canadian Consulting Engineer article



This project won a 2018 Award of Excellence in the Transportation category at the Canadian Consulting Engineering Awards on October 23, in Ottawa.

Awards of Excellence are bestowed to ACEC member firms who have achieved the highest level of excellence in quality of engineering, innovation and societal benefit. 

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