for scene 2 of the video " Water Crisis: Healing the Colorado River - part 1" by Rolf Witzsche
here for a larger image
The Hoover Dam
The Hoover Dam forms a giant water storage reservoir behind it, named Lake Mead, that serves to smoothen out flow fluctuations, and to raise the surface of the river close to 700 feet to enable hydroelectric power generation.
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Published by Cygni Communications Ltd.
North Vancouver, BC, Canada - (C) in public domain - producer Rolf A. F.