Photo Courtesy of DIA Holding DIA Holding completed the 2.7-million-sq-ft mixed-use Flame Towers project in Baku, Azerbaijan, in 2012. The project is designed as a first step in transforming Baku into a high-tech center Related Links: Comprehensive Text, Analysis, Charts. Rankings and Revenue (purchase or subscription required) ENR's Top Lists ENR's Top International Contractors Despite some global upheavals and uncertainty, the world construction market showed surprising strength for large contractors in 2011. After being flat in 2009 and 2010, revenue for large international contractors grew last year. However, big contractors working in the international market are expressing some caution about
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.