The Centennial Bridge, or Rock Island Centennial Bridge, connects Rock Island, Illinois and Davenport, Iowa. The bridge is 3,850 feet (1,173 m) long and stands 170 feet (52 m) above water level.
Construction of the bridge began in 1938 and it opened on July 12, 1940 as a toll bridge. The bridge cost $1.75 million to construct. It was designed by Ash-Howard-Needles & Tammen and built by the American Bridge Company, McCarthy Improvement Company, and Priester Construction Company. The original toll was $0.10, and eventually rose to $0.50 for automobiles (and as high as $2.00 for semi-trucks). Early in the bridge's history, pedestrians paid a $.05 walker's fee; this fee ended in 1960. The tolls for motorists ended on May 2, 2003. On that day, a ceremony was held to commemorate the occasion and to honor the toll workers and all of those who had worked for the bridge during the toll era. The bridge had been under the management of Sue Nelson before going toll-free. The Dohrn Transfer Company of Rock Island, the first official toll-paying vehicle to cross the bridge in 1949, was the last official patron of the bridge.
On September 4, 1988, lights were installed on the arches, making the bridge a scenic sight at night.
On July 13, 2005, the city of Rock Island transferred ownership of the bridge to the Illinois Department of Transportation after the completion of a project costing over $11 million in structural upgrades to the bridge.
It was originally going to be named the "Galbraith Bridge", after Rock Island's mayor at the time, Robert Galbraith. He suggested it be named the Centennial Bridge, in commemoration of the city of Rock Island's centennial.
The five arches of the bridge are a symbol often used to represent the Quad Cities. The two largest arches symbolize Rock Island and Davenport while the smaller ones represent the other surrounding Quad-Cities (Bettendorf, Moline, and East Moline). Modern Woodmen Park in Davenport is located just upriver from the bridge. On the Rock Island side, "The District," the nightlife hub of the Quad Cities, is located about one block east of the bridge.