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.
It is the most costly project in state transportation history, requiring pavement maintenance cuts to pay for the added expenses. The cast-in-place concrete, steel-reinforced bridge consists of two parallel, 14-m-wide three-lane structures with 210-m center spans.