iStockphoto Do concerns about liability limit the expansion of ethical engineering practice? The American Society of Civil Engineers has taken many steps to transform engineering and champion infrastructure. In 2009, the society produced a road map for the future of the profession; just recently, it produced a report documenting the economic costs of diminished spending on infrastructure. But a transformation so sweeping is bound to have rough spots, just as some of the most ardent supporters of a revolution are destined to be disap-pointed. Officially, ASCE policy supports engineers doing everything possible to promote safety. Making that happen in practice
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.