Related Links: See all of the Best of the Best Projects 2012 Winners Industry professionals from all across the U.S. donated their time and expertise to help ENR identify and honor the most outstanding construction efforts completed in the U.S. and Puerto Rico between July 2011 and June 2012. Nearly 1,000 project teams submitted their best work to ENR's regional "Best Projects" competitions. For each of the nine regions, our editors assembled an independent panel of industry judges to home in on the winners in 19 categories. The winners of the regional contests moved on to the national competition.A new
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.