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Hydroelectric power — using water to generate electricity — seems old-fashioned, but it’s the biggest source of renewable energy in the United States.
And it’s big business for MWH Global, the Broomfield-based engineering firm that’s considered the second-biggest hydroelectric design firm in the nation, according to the 2013 ranking from Engineering News-Record, an industry publication.
Renewable-energy sources provided 12 percent of the nation’s electricity needs in 2012, according…