The province of Alberta, Canada, agreed on July 27 to give $297 million toward a $1.6-billion project that will create synthetic gas out of coal in Whitecourt, Alberta, that can't be mined. Then, the gas will be used to generate 300 MW of electricity.Construction of the Swan Hills in situ coal-gasification project, 177 kilometers northwest of Edmonton, is projected to begin in 2013. By 2015, Edmonton, Alberta-based Swan Hills Synfuels expects to capture 1.3 million tons of carbon dioxide from the gasification. That CO2 will be used for enhanced oil recovery in the area.The Swan Hills Synfuels project will use
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.