http://www.newsweek.com/photos-glen-canyon-dam-lake-powell-1799933

Satellite photos show the Colorado River before and after the Bureau of Reclamation released a huge outflow of water from the Glen Canyon dam, raising water levels in the river.

Glen Canyon Dam forms Lake Powell, the huge Colorado River reservoir which lies between Arizona and Utah. Paired with Lake Mead, the reservoirs provide water for about 40 million people.