Tri-City Herald reporter Annette Cary, who covers the U.S. Energy Dept.’s Hanford nuclear waste cleanup site for the Washington state newspaper, says employees there chafe at how high profile their work has become. For more than 60 years, their predecessors on the remote 586-sq-mile site toiled in total secrecy on a previous mission�to build America’s first generation of atomic weapons. Slide Show U.S. Dept. of Energy Probing for toxics long buried in underground tanks and demolishing old radioactive buildings are Hanford’s new mission. U.S. Dept. of Energy Probing for toxics long buried in underground tanks and demolishing old radioactive buildings
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.