The tenuous fate of an estimated $8.7-billion trans-Hudson River rail tunnel exemplifies a dilemma faced by the American transportation industry as a whole: how to fund crucial megaprojects at a time when raising fuel taxes is political suicide and passing a multiyear transportation bill remains a pipe dream. + Image Photo: NYNJ Port Authority New Jersey Gov. Christopher Christie (R) announced on Oct. 7 that he was killing the project, called Access to the Region’s Core (ARC) and in development for almost 20 years. But after a quickly arranged meeting with U.S. Transportation Secretary Ray LaHood and Federal Transit Administrator
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.