Construction on the nation’s first data security center for the National Security Agency officially launched with a Jan. 6 groundbreaking on a 240-acre site at the Utah National Guard’s Camp Williams, located about 35 miles southwest of Salt Lake City. The center will consist of approximately one million sq ft of enclosed space, including 100,000 sq ft of computer space devoted to detecting threats to the nation’s cyber security. The design-build team of Balfour Beatty, DPR and Salt Lake City-based Big-D Construction will build the $1.2-billion project.
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.