While it is uncertain exactly how the U.S. will address climate change, it is clear that any regulations aimed at reducing the nation’s carbon footprint will impact construction—for better and for worse. Potential winners are those companies that build powerplants, transmission lines and install energy-efficiency measures. Firms that are leaders in sustainable building and design are also well positioned to profit from carbon regulations. Potential losers, however, will not be as clear until legislation to regulate carbon is finalized. “There are ways that it can have benefits and drawbacks,” says Calli Schmidt, spokesperson for the National Association of Home Builders.
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.