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Great River Energy

Grid-Enhancing ‘Magic Balls’ to Get a Major Test in Minnesota

A simple technology that can make the grid more efficient has gained traction in Europe, but not the United States—until now.

By Dan Gearino

This sensor, made by Heimdall Power, helps the operator of a power line know how much more power can be sent through the line. The eight-pound ball is photographed in Norway. Credit: Heimdall Power
Water vapor streams away from the Coal Creek electric power plant at the Falkirk Mining Company in North Dakota on Jan. 9, 2010. Credit: Karen Bleier/AFP via Getty Images

Sale of North Dakota’s Largest Coal Plant Is Almost Complete. Then Will Come the Hard Part

By Dan Gearino

Trucks wait to enter the Great River Energy Blue Flint Ethanol plant in Underwood, North Dakota, on Thursday, Feb. 9, 2012. Credit: Daniel Acker/Bloomberg via Getty Images

After a Clash Over Costs and Carbon, a Minnesota Utility Wants to Step Back from Its Main Electricity Supplier

By Dan Gearino

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