Looking ahead to the next multiyear highway transit bill, Senate Environment and Public Works Committee leaders have voiced support for improving or enlarging the U.S. Dept. of Transportation’s 12-year-old Transportation Infrastructure Finance and Innovation Act (TIFIA) loan program to help fund major projects. Committee Chairwoman Barbara Boxer (D-Calif.) said that while the Obama Administration’s proposed infrastructure bank has supporters and critics, TIFIA is in place. The committee’s top Republican, James Inhofe (Okla.), criticized the idea of a new infrastructure bank but said TIFIA is “a successful program that must be dramatically expanded.”
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.