The Minnesota Department of Transportation (MNDOT) contracted with Lunda to construct the Wakota River Bridges, which carry I-494 over the Mississippi River in South St. Paul, Minnesota. The bridges are five span cast-in-place segmental concrete box bridge structures that include 466-foot main spans. The width of the structure varied from 90 feet to over 100 feet wide and accommodate five travel lanes with full-width shoulders for both westbound and eastbound traffic. Pedestrian outlooks at each pier provide a panoramic view looking north toward the city of St. Paul. Each bridge is continuous from abutment to abutment for a total length of 1,879 feet. The superstructure is comprised of a variable depth trapezoidal box girder with a maximum depth of 24 feet at the piers and a minimum depth of 12 feet at mid-span. The box girder is post-tensioned in the longitudinal direction with the top slab also post-tensioned in the transverse direction.

The construction of the superstructures used a combination cast-in-place balanced cantilever with form travelers for the interior spans and cast-in-place on false work for the end spans. A typical segment was 16.4 feet long with a maximum segment weight of 420 tons, comprising 200 cubic yards of concrete and 32,000 pounds of reinforcing steel. One of the principal challenges was developing a form traveler that could accommodate the deck widths while not conflicting with the existing adjacent tied arch that was carrying live traffic. To manage the challenge, Lunda developed a form traveler and forming system, which included extensions that could be removed when in conflict with the existing bridge. This allowed work to progress without having to adjust any final geometry of the structure design.