With the congressional August recess around the corner, House and Senate lawmakers were moving along separate tracks with competing plans to avert an imminent crisis in the Highway Trust Fund. The House was aiming for a $5-billion “fix,” designed to prop up the fund’s struggling highway account until Sept. 30. The Senate was working on a $26.8-billion infusion designed to keep the fund healthy through March 2011. Observers expected a deal to be struck before the recess, but at ENR press time the exact outcome was by no means clear. The differences between the House and Senate trust-fund remedies are
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.