Plans for $45 billion investment in a 540 km core network of high-speed railroads were launched by the U.K. government on March 11. Work on an initial 206 km line between London and the Birmingham area, estimated to cost up $26 billion, could start around 2017, forecasts the Department for Transport. “Building this network would not only revolutionize Britain’s transport, but would also present significant new opportunities for the U.K.’s design, engineering, construction and manufacturing sectors,” says transportation secretary Andrew Adonis. At this stage, the government expects the project to be publicly funded. The core Y-shaped network, for 400 km
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.