Many ENR readers have watched with interest the recent debate over the proposed Las Vegas-to-Los Angeles high-speed rail corridor running along Interstate 15. Long viewed as a potential maglev project, things got a little murky last month when U.S. Senate Majority Leader Harry Reid (D-NV) switched his support from maglev to conventional high-speed steel wheel technology. But what happened in Vegas is not staying there. With the advent of the Obama presidency, rail suddenly is a hot and potentially lucrative topic everywhere.
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.