As the Colorado River shrinks, it’s revealing an iconic canyon that’s been underwater for decades since it was dammed up in ...

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 ...

Glen Canyon Dam on the Colorado River, where prolonged drought has intensified scrutiny of post-2026 reservoir operations under a newly released federal draft environmental impact statement. January ...

The Colorado River is about to get a new set of rules for its two largest reservoirs — Lake Powell and Lake Mead.

Vertical hydroelectric generators inside Hoover Dam are shown in January 2020. Modeling in the U.S. Bureau of Reclamation’s Draft EIS shows that declining reservoir elevations at Lake Mead reduce ...

In late May, as the outside temperature approached 100 degrees, Arizona’s top water policy officials gathered in an air-conditioned Phoenix conference room. Their purpose that day was to decide ...

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, ...