Related Links: ENR's Top 225 International Contractors The big are getting bigger. Growing economies around the world and unforeseen global events—from financial shifts to earthquakes—are generating such huge demands, particularly in natural resource development, that owners and contractors are pushing out construction at record size and speed, participants say. Even long-term industry veterans think the trend is unprecedented. “The growth in the southern hemisphere is more than I've ever seen before at any one time,” says Bill Dudley, president and chief operating officer of Bechtel Group Inc. Australia's still untapped resource reserves have made it a hot spot for an array of
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.