Many transportation experts say federal and state transportation departments need to radically change how they fund and deliver projects, with an emphasis on performance measures, private involvement and design-build. A number of federal and state officials are calling for a “major reform” in how federally funded transportation projects are assessed and delivered and how their own departments are organized. “The time is right to move to a performance-based program,” says Jeffrey Paniati, executive director of the Federal Highway Administration. “We need to focus less on the process and more on the outcome” of projects, he says. Paniati was part of
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.