Atlanta-based Southern Co. plans to demonstrate carbon dioxide capture and storage technology at a coal-fired powerplant near Mobile, Ala., with a portion of the carbon emissions at the plant captured for underground storage in a deep saline geologic formation. Southern, along with the Dept. of Energy, Mitsubishi Heavy Industries, the Electric Power Research Institute and others, will build a demonstration facility at Alabama Power’s 2,657-MW Barry generating plant. Beginning in 2011, between 100,000 and 150,000 tons of carbon dioxide per year, or the equivalent of emissions from 25 MW of the plant’s capacity, will be captured for storage. The CO2
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.