PHOTO COURTESY OF DUKE ENERGY Duke Energy's Dan River Combined-Cycle Station in Eden, N.C., is leading the utility's shift to natural gas from coal, a growing trend. Related Links: View complete report with Data and Analysis (pdf) Demand Starts To Unfreeze Pay Take the Natural-Gas Highway Cheap natural gas is lighting a fire under manufacturing, a sector of the U.S. economy given up for dead as the Rust Belt spread and the so-called service economy became the nation's fallback. Taking advantage of low-cost feedstock, a petrochemical industry boom on the U.S. Gulf Coast is expanding to areas near the great
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.