Giant dams built to conserve the Colorado River have nearly wiped out nearby native cottonwood trees, causing big ecosystem disruption. Tiny dams built to mimic those built by beavers could bring them ...

Representatives of California, Arizona and Nevada are urging the Trump administration to take a different approach in confronting the problems of the water-starved Colorado River. As Trump’s ...

There is no more water available. That’s the assessment of a new report published Wednesday about the Colorado River by a coalition of environmental groups urging the states that rely on the river and ...

Lake Mead makes an unexpected gain, stashing water that wasn’t needed during California rains. A deal appears to be far off as Colorado River officials finish meetings in Las Vegas.

Hydropower output at Hoover Dam is down by about half since 2000. Lakes Mead and Powell are approaching critical thresholds below which hydropower generation would be severely curtailed or cease.

Giant dams built to tame the Colorado River have nearly wiped out native cottonwood trees along many riverbanks, disrupting local ecosystems. But new tiny dams, built to mimic ones that beavers make, ...