A House committee has cleared a four-year aviation reauthorization bill that would provide a boost for airport construction grants and a hike in passenger facility charges, as an airport group says capital needs continue to climb. But with a temporary Federal Aviation Administration authorization set to lapse March 31, another extension is likely. The House Transportation and Infrastructure Committee on March 5 approved a bill that would authorize $70 billion for FAA over the 2009-2012 period. It includes $16.2 billion for FAA's Airport Improvement Program, which provides grants to fund runways, taxiways and other infrastructure. Under the bill, AIP would
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.