Not all states are turning down federal funding for high-speed passenger rail. The U.S. Dept. of Transportation has formally obligated $590 million in American Recovery and Reinvestment Act funds to the Washington DOT, clearing the way for passenger rail infrastructure projects in that state. The state DOT announced on Feb. 26 that it had reached agreements with federal and railroad officials on releasing the funds as well as a spending plan and rail-service benchmarks. U.S. DOT awarded Washington $590 million in January 2010, when it announced the winners of ARRA’s $8 billion for high-speed passenger rail. But agreements with state
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.