The highest bridges in the United States are as spectacular as the tallest buildings and skyscrapers across the country.

River Trail, Plateau Point Trail and Silver Bridge will remain closed until Oct. 1, according to the National Park Service.

BULLHEAD CITY, Arizona — After decades of waiting, residents now have another option to cross the Colorado River between Laughlin and Bullhead City, Arizona. The $60.6 million Silver Copper ...

The US Marines built a temporary bridge across the Colorado River so Light Armored Reconnaissance could cross it. Here's how they did it. Following is a transcript of the video. US Marines built a ...

Arizona recycles more than half its wastewater, the second-highest rate among the seven states on the Colorado River, a new study found. If all seven states on the river reused as much water as ...

A new study gives Arizona and Nevada high marks for their reuse of treated sewage effluent as a way to reduce Colorado River use, but says the other five river basin states have a long way to go.

Peter McBride From its source high in the Rocky Mountains, the Colorado River channels water south ... And boaters still roar across Nevada and Arizona’s Lake Mead, 110 miles long and formed ...

Federal officials say plan for water cuts from 3 Western states is enough to protect Colorado River The U.S. Department of the Interior is throwing its support behind a proposal by Arizona ...

PHOENIX— A developer notified federal regulators today that it has abandoned plans for a 200-foot-tall dam along a remote, biodiverse stretch of the San Francisco River at the Arizona-New Mexico ...