NEW YORK (Reuters) - Ontario Power Generation's 490-megawatt Unit 4 at the Nanticoke coal-fired power station in Ontario returned to service by early Thursday, while Unit 7 shut for short planned work, a spokesman for the company said.
He could not say exactly when Unit 7 would return. Electricity traders guessed Unit 7 would return within a week.
Unit 4 meanwhile shut by Wednesday.
Nanticoke is located on the north shore of Lake Erie in Nanticoke about 80 miles southwest of Toronto.
Reporting by Scott DiSavino