To critics, Glen Canyon Dam was one of the U.S.'s biggest environmental mistakes. But it generates electricity for about 5 million people in seven states.

Glen Canyon Dam under construction in 1963. This view from upstream, behind the dam, reveals the eight penstocks that feed water through eight massive generators in the power plant, producing 4.5 ...

These actions should prevent Lake Powell from falling so low in the near future that Glen Canyon Dam’s power-generating turbines would have to be shut off.

A Flagstaff-based hub for regional science -- and for the protection of the Grand Canyon and the Colorado River -- could be under threat from President Donald Trump’s proposed cuts to the ...