The hunt is on for a share of $1.5 billion in U.S. Dept. of Transportation discretionary grants created by the American Recovery and Reinvestment Act. The new program, which DOT calls Transportation Investment Generating Economic Recovery (TIGER) grants, is aimed at projects that “will have a significant impact on the nation, a metropolitan area or a region,” the measure says. David Bauer, American Road and Transportation Builders Association senior vice president, says ARRA “basically had layers of activity.” For highways, the first layer was quick-starting projects like paving jobs, whose funds were obligated by July. Second-layer projects’ money must be
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.