The market for developing power- generation facilities in the United States remains weak in mid-2010 as utilities, faced with lagging demand for electricity, continue to put off plans for new plants. Photo: Duke Energy Although the number of coal plants being built is heading down, Duke Energy’s 630-MW integrated gasification/combined-cycle plant in Edwardsport, Ind., is going forward. Related Links: View More on Top 500 Sourcebook 2010 View Complete Top 500 Sourcebook 2010 with Data and Analysis Not all the news is bad, though. Engineering and construction executives say the need for new generating capacity will grow as the economy rebounds
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.