Related Links: List of all TIGER round-four awards The U.S. Dept. of Transportation has awarded $485.4 million to 47 highway, bridge, rail. port and other projects in the latest round of its highly popular TIGER grant program.The new awards, which DOT announced on June 22, went to projects in 34 states and the District of Columbia. The grants constitute the fourth round of the Transportation Investment Generating Economic Recovery program. Since the program was launched in 2009, DOT has distributed a total of $3.1 billion for 218 projects.DOT Secretary Ray LaHood told reporters in a conference call, “Through TIGER we
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.