A projected August Highway Trust Fund shortfall has been averted, at least for now. President Obama signed a bill on Aug. 7 adding $7 billion to the trust fund�s ailing highway account. The new money, transferred from the general fund, is expected to keep the account solvent through Sept. 30 or maybe a bit longer. When Congress returns after Labor Day, debate is likely to heat up over reauthorizing highway and transit programs.
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.