A plan to sustainably manage the shrinking waterway could soon be up to the Trump administration — or eventually the Supreme ...

States signed the Colorado River compact in 1922 to stave off water conflicts. It created the Upper Basin states (Colorado, ...

As climate change drives drier winters and shrinking snowmelt across the West, Southern California and Arizona are rushing to ...

Scottsdale relies on the Colorado River for up to 75% of its tap water, which means deeper cuts would hit the city hard.

As climate change drives drier winters and shrinking snowmelt across the West, Southern California and Arizona are rushing to diversify their water supplies — investing in recycling, storage and ...

If there's no agreement among the seven Colorado River states on a drought plan, Arizona could face new cutbacks. Here's what ...

Looking downriver at Hoover Dam on the Arizona-Nevada border. Hoover, formerly known as Boulder Dam, and its Lake Mead reservoir serve as a critical water bank for the two states and California.

The headwaters -- The law of the River -- Tributaries -- Go West -- Grand Valley -- Salt, dry lots, and houseboats -- Lees Ferry -- Boulder Canyon Project -- Las Vegas -- Colorado River Aqueduct -- ...