SWEPCO and lawyers for the plant's opponents appeared before the high court on Wednesday. Landowners say the Public Service Commission didn't follow the law when it conducted hearings prior to issuing a permit for the plant in Hempstead County.
SWEPCO says it proved it needs the plant and says it will be the cleanest coal plant in the country. But the landowners say less than 20 percent of the plant's power will go to Arkansas customers and that the plant will have a tremendous environmental impact, releasing mercury and carbon dioxide.
The court will rule later.
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