American Municipal Power (AMP) has agreed to close the facility after being fined $850,000. The company will also give $15 million on energy-saving initiatives to its customers.

Regulators have long ignored standards that would have closed the plant years ago.

There should be a significant upgrade to the area's air quality once the plant closes, since the Mid-Ohio Valley makes the nation's list as having high-risk air pollution.

The company supplies power to scores of communities in Ohio and neighboring states.