International Bridge Technologies

St. Croix River Bridge – Saint Joseph, Wisconsin

Technical details
Minnesota Department of Transportation and Wisconsin Department of Transportation

Construction Completed: 2017

Oak Park Heights, Minnesota/St. Joseph, Wisconsin
General Contractor: Lunda/Ames Joint Venture
Structural Engineer: HDR/COWI
SYSTRA IBT’s Role: Independent Check Engineer and Construction Engineering Inspection.

The St. Croix River Bridge length of the main span unit is 3365 ft consisting of a 5-pylon extradosed cable-stayed bridge. The interior spans are 600 ft long with 2 end spans of 335 ft. 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 ASBI – Bridge Award of Excellence
  • 2018 ACEC – Engineering Excellence Honor Award
  • 2018 Roads & Bridges MagazineTop 10 Bridge Award, No. 7

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