With the Obama Administration’s decision to defund the Yucca Mountain nuclear- waste repository, many industry observers wonder what the next step for permanent disposal of spent nuclear fuel will be. Many are keeping a watchful eye on the president’s Blue Ribbon Commission on America’s Nuclear Future, which Obama established in January 2010 to develop recommendations to guide future policies for nuclear waste. The 15-member commission or its subcommittees have met several times this year, and the full commission plans to meet on Nov. 15 in Washington, D.C. The group is expected to release a preliminary report in spring 2011. “It’s
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.