Senate Republicans--and one Democrat--again have blocked a package of extensions of tax incentives, including some that construction industry groups support. Democrats' failure to win a procedural vote on June 24 sends the drafters of the bill back to the drawing board. The 57-41 vote to cut off debate on the tax "extenders" bill was three votes short of the 60 that Democrats needed. Democrat Ben Nelson of Nebraska joined 40 Republicans who voted "no." It is the third time that an extenders package has been sidetracked on the Senate floor in recent weeks. The latest vote left the fate of
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.