American Electric Power is considering whether to proceed with a commercial-scale carbon-capture project at its 1,300-MW Mountaineer plant in New Haven, W.Va., because of unclear federal guidance, a company spokeswoman said on Dec. 27. She said Charles Patton, president and CEO of AEP utility Appalachian Power, told West Virginia regulators earlier this month that it is re-evaluating the estimated $660-million project in light of no federal legislation regulating carbon-dioxide emissions. AEP, which has been operating a pilot 30-MW carbon-capture project at the Mountaineer plant since 2009, had planned to build a 235-MW facility that would begin operations in 2015. The
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.