WHITAKERCynthia Whitaker, 69, former preconstruction vice president at ISEC Inc., an Englewood, Colo., contractor, died on Oct. 15 of cancer, says the firm. She joined the firm in 1978, retiring in 2005. ISEC ranks at No. 45 on ENR's Top 600 Specialty Contractors list, with $252.5 million in revenue.
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.