The economy may have curbed passenger traffic at many U.S. airports, but its effects on aviation construction so far have been minimal. The reason is the extensive amount of time required for airport construction programs to evolve, says Jayne O’Donnell, vice president of Turner Construction Co., New York City, and general manager of Turner’s aviation practice. Related Links: Contractors Play Waiting Game As Funds Start to Trickle In “Work is on schedule because it’s been scheduled for years,” O’Donnell says. Despite continuing turmoil among air carriers, “Airports are pretty skilled in planning and building for what’s probable, not what’s possible,”
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.