STEHLY Richard D. Stehly was an activist in the American Concrete Institute for more than 30 years, pushing the technical boundaries and construction possibilities of the materials to the global industry. But his Sept. 18 death in Edina, Minn., apparently after suffering a fatal heart attack at a hockey game, has silenced him only six months after reaching the advocacy group’s top spot as president. ACI says that Kenneth Hover, Cornell University professor of civil and environment engineering, and the group’s senior vice president, will succeed Stehly as president. Stehly was also senior vice president and principal engineer of American
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.