A special report titled “Green Outlook 2011,” published by McGraw-Hill Construction, points to green buildings as one of construction’s fastest-growing sectors. Starts increased 50% from 2008 to 2010. This year, MHC estimates green buildings will account for a third of all new non-residential construction, totaling $54 billion in starts. “This growth would be notable under any circumstances, but [it] is particularly dramatic given the decline in overall construction during the same period,” says MHC. It predicts that, by 2015, non-residential green building markets will nearly triple, growing to between $120 billion and $145 billion. It predicts the retrofit and renovation
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.