Operations At OAO RusHydro's Sayano-Shushenskaya Hydro Power Station [Getty Images]

The Sayano-Shushenskaya hydropower station, operated by OAO Rushydro, stands on the Yenisey river near Sayanogorsk, Russia, on Wednesday, Feb. 22, 2012. OAO RusHydro, Russia's largest hydropower producer, fell in U.S. trading on concern colder weather will reduce electricity production and as Deutsche Bank AG cut its target price for the company's stock. Photographer: Andrey Rudakov/Bloomberg via Getty Images

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