Others in the top 10: Southern Company, Great River Energy, Ameren Corp.
This change is coming, led by energy co-ops like Great River Energy in Minnesota.
The group Wadebridge Renewable Energy Network (WREN) has been investigating harnessing energy from the Camel river.
One of the more ambitious acquisitions was made by Warren Buffett's Mid-American Energy, which purchased the Kern River pipeline in 2002.
Less than one percent of Califonia's energy supply comes from the lower Snake River dams, conservation groups note.
Feasibility research is being carried out by Plymouth University and Totnes Renewable Energy Society (TRESOC) into the River Dart at Dittisham.
He was acquiring an offshore island across the Yangtze River from Shanghai meant to become the most fully energy self-sustaining eco-city in the world.
The proposals form part of Peel Energy's vision to develop the mouth of the River Mersey into a "renewables hub" and sits alongside plans to harness tidal power from the river.
Nevertheless, conservation groups maintain that the energy crisis does not dim their current proposal to remove the four Lower Snake River dams in order to recover endangered salmon populations.
The great river of wind that flows from Texas to the Canadian border is one of the finest renewable energy reserves in the world and the American Wind Energy Association estimates that it could power America twice over.
For junior hydroelectric companies, these run-of-river projects are a less expensive, more efficient, and fish-friendlier way to get in on the energy game.
"This energy crisis will not spiral out of control or be brought under control by what happens to the Snake River dams, " said Scott Bosse of Idaho Rivers United.
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