RUDOLPH Frederick “Fritz” Rudolph Sr., cofounder and former president and chairman of Walbridge, Ohio, building contractor The Rudolph/Libbe Cos. Inc., died on Jan. 11. He was 79. The firm, founded in 1955 with Rudolph’s brother and cousin, reported $321 million in 2007 revenue. He retired in 2004 and was president of Associated General Contractors of Ohio.
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.