Although a key Senate committee has cleared a sweeping climate-change bill, the measure faces a difficult road ahead. The Environment and Public Works Committee on Nov. 5 approved a measure, introduced by John Kerry (D-Mass.) and panel Chair Barbara Boxer (D-Calif.), by a 11-1 tally, with Republicans boycotting the vote. But a small group of lawmakers, including Kerry, is working behind the scenes to craft a more moderate bill that could garner bipartisan support. Some industry sources say that proposal may have better odds of clearing the full Senate. Still, with Congress focused on health-care reform and other fiscal issues,
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.