The White House announced on April 2 that President Obama has selected Victor M. Mendez, former director of the Arizona Dept. of Transportation, to lead the Federal Highway Administration, subject to Senate confirmation. The President also chose Jo-Ellen Darcy, a long time Senate aide, as assistant secretary of the Army for civil works—the Pentagon official who oversees the Corps of Engineers—the White House said on March 31. Mendez joined Arizona DOT in 1985 as a transportation engineer and rose through the ranks to become the agency’s director in 2001. He left the top agency job in February after Jan Brewer
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.