The seven states that share the Colorado River are floating a new concept for how water could be shared in the future, ...

Colorado transportation officials closed Interstate 70 west of Vail on Wednesday for several hours because of a wildfire.

Interstate 480 over the Missouri River ...

Colorado’s top water board unanimously agreed Tuesday to hear out Front Range water operators’ concerns about a Western Slope ...

Arizona is tussling with other states over how much of the Colorado River it should receive. But how will Arizonans divide ...

Last year over the Fourth of July holiday period, more than 235,000 vehicles traveled through the Eisenhower/Johnson Memorial ...

Arizona officials present details of a new proposal to share future shortages on the Colorado River. The "supply-driven" solution would base allocations on the river's actual flows, not on storage ...

Arizona officials present details of a new proposal to share future shortages on the Colorado River. The "supply-driven" solution would base allocations on the river's actual flows, not on storage ...

A leading Colorado River researcher says current global warming ... In the language of water managers, it means a river that the interstate negotiators of a century ago asserted could provide 15 ...

A leading Colorado River researcher says current global warming forecasts paint a grim picture for Western water users, who could see supplies cut by one-third at century's end.

The Southwest and Rocky Mountain states are reviewing a plan that could split Colorado River water based on actual flows, not storage.