Steam billows from a smokestack of Duke Energy’s Allen power plant in Belmont.
Steam billows from a smokestack of Duke Energy’s Allen power plant in Belmont. JOHN D. SIMMONS jsimmons@charlotteobserver.com
Steam billows from a smokestack of Duke Energy’s Allen power plant in Belmont. JOHN D. SIMMONS jsimmons@charlotteobserver.com

Duke Energy settles federal air case for $5.4 million

September 10, 2015 12:28 PM

UPDATED September 12, 2015 07:51 PM

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