Construction's unemployment rate continued downward in May, its third-straight monthly improvement, despite a loss of 35,000 jobs, the Bureau of Labor Statistics reported. In its latest monthly employment report, released on June 4, BLS said construction's May jobless rate dipped to 20.1%, from April's 21.8%. But the rate for last month still exceeded the May 2009 mark of 19.2%. Ken Simonson, Associated General Contractors' chief economist, noted that it was the worst May rate for construction since 1976, when BLS began that statistical series. Moreover, construction's 21.8% rate remains the highest among industry sectors and is well above the second-worst
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.