Construction's unemployment rate moved down slightly in August but remains highest among all industries. Construction's unemployment rate edged downward in August, to 17.3%, from 17% in July, but it was slightly worse than the August 2009 level, reports the U.S. Labor Dept.'s Bureau of Labor Statistics. BLS's latest monthly look at the nation's employment picture, released on Sept. 3, says that construction added 19,000 jobs in August, but noted that 10,000 of the jobs gained were workers who returned after a strike in July. Although BLS doesn't say so, it's likely that some or most of those workers were involved
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.