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 ...

The Federal Energy Regulatory Commission has accepted a preliminary permit application for a 24-story dam spanning the Little Colorado ... from the confluence with the Colorado River in Grand Canyon ...

The damage was recently detected in four 8-foot-wide steel tubes — called the river outlet works — that allow water to pass through the dam in northern Arizona when Lake Powell reaches low levels.

When Glacial Lake Missoula's ice dam shattered ... in a stretch of flood-chiseled canyon called the Lower Grand Coulee, raging waters gouged out holes in the basalt cliffs, forming shallow ...

this half-day tour takes you over Lake Mead, one of the most impressive lakes in Arizona; Fortification Hill; the Hoover Dam and more before stopping to land 3,500 feet into the Grand Canyon.

One of the best Grand Canyon helicopter tours, this excursion features panoramic views of the Hoover Dam, Lake Mead, the Mojave Desert and of course, the Grand Canyon. The tour covers roughly 10 ...