A cathedral-arch bridge—the nation’s longest at 525 meters—is inching toward completion in a rural patch of northern Nevada three years after the original contractor left the project. The 90-m-tall structure, which spans Galena Creek, is part of the $600-million, 8.5-mile Interstate 580 extension between Reno and Carson City, now millions of dollars over budget and four years late. Photo: Massmedia Soaring crossing over Galena Creek is part of delayed I-580 extension. Photo: Massmedia New freeway will ease traffic on busy rural U.S 395. It is the most costly project in state transportation history, requiring pavement maintenance cuts to pay for
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.