State transportation officials are hoping Congress will cancel an $8.7-billion rescission of unobligated highway funds that is due to occur on Sept. 30. The Federal Highway Administration notified states on Aug. 25 how large a cut each would incur. California would lose the largest sum, $794 million. In the 2005 Safe, Accountable, Flexible, Efficient Transportation Equity Act: a Legacy for Users, Congress mandated the rescission to take effect on the measure’s last day, Sept. 30, as a way of trimming the legislation’s overall price tag. Key Senate lawmakers already have indicated they support undoing the highway-fund reduction. But when Congress
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.