The tax breaks that fill the $858-billion Middle Class Tax Relief Act will provide welcome benefits for construction workers, some small firms, family-owned businesses and companies mulling equipment purchases. But the key question for the still-struggling construction industry is whether the measure’s incentives, including an extension of 2001 and 2003 tax-rate reductions, will hoist the economy enough to get more projects under way. If that “trickle up” effect does come to pass, it could give construction markets a boost, but probably not a sharp spike and probably not right away. Photo: Ap Images/J. Scott Applewhite Nevertheless, industry economists and financial
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.