I-74 WB Viaduct
The $1.2 billion I-74 Mississippi River Bridge project was broken into 6 separate contracts. Helm was the contractor for the Westbound portion of the corridor on the Iowa side of the river. In addition to the main I-74 bridge, 2 ramp bridges were also part of the project. Caissons, Y-shaped bridge piers and steel girders support a deck that will carry 100,000 vehicles a day.