Despite recent administration efforts to play down the impact of the “Buy America” provisions of the American Recovery and Reinvestment Act (ARRA), industry and business groups remain concerned that the provisions could cause delays on construction projects or be expanded to other programs. Photo: AP/Wideworld At a recent summit of North American leaders, President Obama played down ARRA’s Buy America provisions. “The perception and the fear is that more Buy America-type requirements could be passed, and that creates a level of fear with Canada and our other trading partners,” says Chris Braddock, senior director of procurement policy with the U.S.
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.