In a troubling sign for construction, the industry's unemployment rate showed no improvement in June after three straight months in which the rate declined, as the industry lost 22,000 jobs during the month, the Bureau of Labor Statistics reported. The bureau's employment report for June, released on July 2, showed that construction's jobless rate for the month was 20.1%, the same as May's level, but worse than the June 2009 mark of 17.4%. Anirban Basu, the Associated Builders and Contractors' chief economist, says that for construction, "it is clear that this represents another disappointing jobs report." The Associated General Contractors'
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.