The I-74 Mississippi Bridge spans the Mississippi River connecting roads in Bettendorf and Davenport, Iowa and Moline, Illinois. The existing bridge traffic is overcapacity, leading to long delays and frequent need for repairs. A new bridge is needed to accommodate current and future traffic volumes. The existing structure is being replaced with a bridge that will be will be more than twice as wide as the existing bridge, providing four lanes in each direction. Construction began in July 2017 and is anticipated to take place over 3 ½ years.
Working with Lunda Construction, ISC is fabricating 20,000 tons of steel for west bound and east bound structures. Each bound consists of a basket handle arch with deck and approach plates girders. Each arch includes 30 arch rib boxes. Each approach has over 200 girders. Due to the size of the large component pieces on the arch, the fully assembled boxes are being shipped via barge.