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.