Robert V. "Bob" Whitman, who pioneered geotechnical research in soil dynamics and earthquake engineering beginning in the early 1960s, died in Lexington, Mass., on Feb. 25, at age 84. The cause of death was not released by the Massachusetts Institute of Technology, from which he retired as professor emeritus in 1993. WHITMAN"Bob's technical and policy contributions lie at the very foundation of much that is now state of knowledge and state of practice in earthquake engineering," observed James K. Mitchell, a University of California engineering professor emeritus, in a 2009 oral history for the West Coast-based Earthquake Engineering Research Institute.
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.