More than 100 House Democrats have asked President Obama to help find a “dedicated revenue source” for the high-speed-rail program. In an April 14 letter to Obama, the 106 lawmakers did not specify which options they favor. High-speed rail got $8 billion in the stimulus package and $2.5 billion in 2010 appropriations. However, the legislators say that with budgets tight, high-speed rail cannot keep relying on authorizations and appropriations.
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.