The U.S. Environmental Protection Agency is holding a series of meetings this summer in several states to discuss the federal government’s new plan for restoring water quality in the Great Lakes. The $475-million draft plan, proposed in President Barack Obama’s fiscal 2010 budget, needs congressional approval before it can be implemented. But government officials are moving forward with public meetings and say they may issue requests for proposals as early as late summer 2009 for competitive grants for work to begin in early 2010. “Administrator [Lisa] Jackson feels a great sense of urgency for more action to restore the Great
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.