California, Arizona and Nevada are urging the Trump administration to change course on the Colorado River. The states are ...

A school in Arizona said multiple details previously reported by the National Park Service about a group hike are incorrect.

In Arizona, Calvin Coolidge put aside the role ... I do not suppose I am expected to speak to the dam and the water. Anything I might say to them would be of little effect. They will stand there ...

Arizona is has the second-highest rate of wastewater reuse in the Colorado River basin, according to a new study. And it plans to increase that rate.

There's a legal battle underway between Denver Water and environmental groups over the Gross Reservoir Dam project.

Arizona is well known for its beautiful desert habitat. But there are also plenty of lakes you can visit, despite the arid ...

The infrastructure problems at the dam in northern Arizona have come into focus over the last few years. If the levels of ...