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Interior Secretary Dirk Kempthorne authorized and supervised the releasing of more than 300,000 gallons of water per second from Lake Powell through the Glen Canyon Dam into the Colorado River.

Both Lake Powell and Glen Canyon Dam are upstream from Grand Canyon National Park near the Arizona-Utah border.

The man-made flood will restore sandbars that are essential to native plant and fish species and will continue for three days.

Matt York / AP, Copyright 2008 Los Angeles Times.