Unable to find a buyer and facing expiration in 2010 of their operating permit, the owners of a controversial coal-fueled powerplant shuttered in 2005 will dismantle it starting late this year. The Mohave Generating Station near Laughlin, Nev., had operated since 1999 under a consent decree requiring air-pollution-control retrofits to improve visibility in the Grand Canyon. Photo: Babcock & Wilcox Co Decommissioning costs less than retrofitting to comply with consent decree. Decommissioning, to start in the fourth quarter, will be complete in two years at a net cost of $300 million after the sale of equipment, says Southern California Edison
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.