Existing comment:
The Bridge:
Completed in 1977, New River Bridge is the world's longest single-arch steel span bridge. At 876 feet above the river, it is America's 2nd-highest bridge.
Features To Notice:
Color: The steel used here, Cor-ten steel, rusts slightly on the surface. This surface-rust inhibits deeper rust, protecting the steel and eliminating the need to paint. It also provides the color which darkens with time.
Concrete supports anchoring bridge in opposite slope: Abandoned mine tunnels honeycomb the hillside created a major engineering problem. Engineers developed special supports. |