The St. Croix River Bridge is the new crossing that spans the St. Croix River connecting Minnesota State Highway 36 and Wisconsin State Highway 64. The structure is the second extradosed bridge to be built in the U.S. and the largest road and bridge project in Minnesota history.

The St. Croix River Bridge length of the main span unit is 3365-feet consisting of a 5 pylon extradosed cable-stayed bridge. The interior spans are 600-feet long with 2 ends spans of 335-feet. Its main span is a continuous structure with expansion joints provided at the ends of each side span. The crossing superstructure is constructed of 2 precast parallel multi-cell box girders stitched together with a cast-in-place closure and carries 2 lanes of traffic in each direction, 16-foot shoulders, and a single shared-use path.

SYSTRA IBT’s role was that of Independent Checking Engineer and Construction Engineering Inspection. In that role, SYSTRA IBT performed the independent design review that consists of the main span unit and reviewing of technical submittals and shop drawings. Technical support was provided to oversee the QA inspection team and advise on technical matters.

2019 American Segmental Bridge Institute - American Segmental Bridge Institute
2018 American Council of Engineering Companies - Honor Award Engineering Excellence Awards
2018 Roads & Bridges Magazine - Top 10 Bridges, #7 Bridge

Photo credit: Minnesota Department of Transportation and Wisconsin Department of Transportation

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