U.S. Bureau of Reclamation

Three states are being required to cut their water use under a final plan for managing the Colorado River over the next two years, while the four upstream states are being asked to voluntarily conserve water.

Just days after the federal government released new plans for sharing water from the shrinking Colorado River, it is getting sued by Nevada, one of the states impacted by the plan.

The federal government announced the details of its strategy to rein in demand for the Colorado River’s water through 2027 and 2028 and it will mean big cuts for Arizona’s water supply.

Lake Mead, the largest reservoir in the United States, has plummeted to its lowest water level since it was filled some 90 years ago, another sign of the crisis plaguing the Colorado River system.

Politicians and water officials say the plan could devastate Arizona's water supply, and pushed the federal government to adopt a counterproposal from the three Lower Basin states.

Arizona, California and Nevada would take less water from the Colorado River under a proposal announced Friday by the federal government to stave off crisis in the beleaguered waterway.

Environmental advocates worry about the future of cool mix flows, which send water from Lake Powell to protect threatened humpback chub in the Grand Canyon.

Two environmental groups worry that as drought causes Lake Powell's levels to drop infrastructure at Glen Canyon Dam could threaten water deliveries downstream.

The U.S. Bureau of Reclamation is taking public comment on a proposal to disrupt the spawning of a nonnative fish in the Grand Canyon by releasing spikes of cool water from Glen Canyon Dam. Many in the Colorado River community want more options.

The U.S. Bureau of Reclamation announced its plan for dealing with nonnative smallmouth bass in the Colorado River. The agency wants to release cool water from Glen Canyon Dam to disrupt the fish’s life cycle.