The entire economy is reeling from the recession, but construction particularly has been hit hard. In June, the total construction unemployment rate was 17.4%, according to the Bureau of Labor Statistics. By comparison, the unemployment rate for the overall economy was 10%. Both numbers are not seasonally adjusted. Construction employment rose only in North Dakota and Louisiana, up 5% and 4%, respectively. Jobs disappeared at an alarming rate in the remaining 48 states, including year-to-year declines of 26% in Arizona, 23% in Nevada, 22% in Connecticut and 20% in Tennessee, according to BLS. The impact of federal stimulus spending is
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.