Major John Wesley Powell makes the first recorded trip through the Grand Canyon and ... construction of a high dam on the Colorado River at or near Boulder Canyon. The report also suggested ...

THE completion, just announced, of the great concrete structure originally known as the Boulder Dam, but afterwards officially designated the Hoover Dam, across the Colorado River in Black Canyon ...

Climate-driven declines in Colorado River flows and historically low Lake Powell levels have caused warm water and smallmouth bass to begin passing through the dam into the Colorado River. If they ...

Federal officials have discovered damage inside Glen Canyon Dam that could force limits on how much Colorado River water is released at low reservoir levels, raising risks the Southwest could face ...

It includes round-trip transportation from the Strip in a 14-person vehicle, a drive through Boulder ... Dam and the Mike O'Callaghan–Pat Tillman Memorial Bridge. Then it's on to the Grand Canyon.