I-74 Mississippi River Bridge
The I-74 Mississippi River Bridge project is part of a regional strategy for improving access across the Mississippi River in the Quad Cities. It includes the replacement of the I-74 twin bridges over the Mississippi River, interchange ramp reconfigurations, and interstate and local roadway improvements. Construction began in July 2017 and the new bridge fully opened to traffic in December 2021. The new bridge provides four lanes in each direction and two full size shoulders on the Iowa-bound bridge and Illinois-bound bridge. A multi-use path on the bridge connects to paths in Bettendorf and Moline. Between Middle Road in Bettendorf and Avenue of the Cities in Moline, I-74 has been expanded to three lanes in each direction with additional lanes at select locations.
The concrete deck employs stainless steel exclusively, including in the barriers, to provide a long service life and minimize the need for extensive maintenance and disruptive deck repairs.
The arch segments are anchored to the foundations using specialized, high-strength stainless steel prestressed anchor rods (AISI 2507).
More details here.
I-74 River Bridge website.
Pictures used with permission © Iowa Department of Transportation.