A fter a series of political volleys on Feb. 25 between Florida Gov. Rick Scott (R) and U.S. Dept. of Transportation Secretary Ray LaHood, who proffered a week’s extension of the U.S. DOT’s deadline for accepting federal funding for a $2.7-billion high-speed-rail line, the governor showed no signs of changing his opinion and approving a deal. On Feb. 25, the original deadline for Florida, media reports said the governor was rejecting a second proposal that provided for a Tampa-Orlando line. That latest proposal created an interlocal entity to oversee the project and shield the state from liability. Scott initially rejected
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.