The data-center market, especially for web hosting, is one of the few truly hot markets in this recession. It also is one of the most secretive, mostly for security reasons and to keep competitors at bay. Thus, it is a little unusual for DPR Construction to be releasing the plans for two new Facebook data centers. Photo: Courtesy Of DPR Construction Related Links: The Top 400 Contractors: At a Glance On April 7, Facebook announced it would release details of its server configurations, including mechanical and electrical plans for its 147,000-sq-ft data center in Prineville, Ore., to the open-source community.
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.