How did Glen Canyon Dam create Lake Powell?

The Glen Canyon Dam, which was completed in the mid-1960s, created Lake Powell by impounding the waters of the Colorado River in northern Arizona and southeastern Utah.12

The reservoir is named in honor of the American explorer and geologist John Wesley Powell, who famously led expeditions through the Colorado River and the Grand Canyon in the late 19th century. The construction of the dam was a significant and controversial engineering project that helped shift regional water policy toward greater emphasis on environmental protection and water management.32