On Oct. 29, the U.S. Commerce Dept. reported the U.S. economy grew by an unexpectedly high 3.5% during the third quarter of 2009, ending a string of four consecutive quarters of a shrinking economy. For many, this is a sign the recession may be abating. For others, this is just a sign the various government stimulus moves did their job for the time being, but more time and effort will be needed before a true recovery begins. Photo: University Medical Center at Princeton in Plainsboro Related Links: The Top Owners Sourcebook Complete Report Developers: Firms Bracing as Building Market Searches
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.