The company earlier said that it planned to shut the unit by October 15-18 to investigate and correct a boiler reheat tube metal temperature reading high.

Located in Cason in Titus County, the 1,584MW Welsh plant has three 528MW units which entered service in 1977, 1980 and 1982.

The company’s Southwest Electric Power subsidiary owns and operates the power station.

AEP, based in Columbus, Ohio, transmits and distributes electricity to more than 5 million customers in 11 states. Reportedly, the company owns nearly 39,000-mile network that includes more 765 kilovolt transmission lines than all other US transmission systems combined.