I-74 EB 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 2019 and the Eastbound portion in 2021. Caissons, Y-shaped bridge piers and steel girders support a deck that will carry 100,000 vehicles a day. The Helm Civil portion of the corridor lead to the tied arch river crossing bridge.