Three years after the state of Connecticut failed to generate any bids on the nation’s first extradosed bridge project—a hybrid cable-stayed, box-girder structure—three firms now are competing for the superstructure work. The low bid is about $33 million below engineers’ estimate. Photo: URS Corp. Reduced bid package helped generate three bidders for Q bridge superstructure work. When bids were opened on June 3 for the Pearl Harbor Memorial Bridge, known as the Q bridge because it spans the Quinnipiac River, the joint venture of Walsh Construction Co., Sharon, Mass., and PCL Civil Constructors, Tampa, Fla., was the apparent low bidder
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.