The U.S. Dept. of Transportation has announced the winners of $600 million in in the second round of Transportation Investment Generating Economic Recovery (TIGER) grants for projects that supporters say will have significant national or regional benefits. Photo: King County, Wash. Replacement for Seattle's South Park Bridge gets $34-million TIGER Grant Related Links: TIGER II capital-grant awards and project descriptions The largest grant among the 42 awards was $47.7 million to the city of Atlanta to help finance a $72.2-million, 2.7-mile downtown streetcar line. Other big winners were a plan to unsnarl a freight rail bottleneck in Fort Worth, Texas,
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.