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Engineering | Architecture | Planning

I-35W St. Anthony Falls Bridge Design-Build

TKDA played a major role in the design of the I-35W St. Anthony Falls Bridge Project. As part of the FMJV Design-Build Project Team, TKDA was the Design Engineer of Record for the:

  • Interstate highway and local roadways
  • Second Street bridges
  • Retaining walls
  • Water resource features
  • Pedestrian tunnel
  • Signing, signals, utilities, and lighting
  • Maintenance of traffic


TKDA’s design for the Second Street Bridges accommodated the future profile lowering of I-35W north of Second Street and thereby avoided the need to prematurely replace the bridges. Our innovative use of loop anchors accommodated the stringent project-specific design criteria, the necessary shallow structure depth to accommodate future infrastructure improvements, and the bridges’ high post-tensioning requirements. The project, which received national attention, was completed and opened to traffic months ahead of the original aggressive schedule.

CLIENT: The Joint Venture of Flatiron Constructors, Inc. and Manson Construction Company
LOCATION: Minneapolis, Minnesota