HOUSTON (Reuters) - One of the 494-megawatt units at Ontario Power Generation's Lambton coal-fired power station in Ontario returned to service by early Tuesday, while another unit was shut for planned maintenance, a spokesman for the province-owned generating company said.
Unit 1 returned to service, while Unit 2 shut for a short-term outage. The spokesman could not say when the unit would return due to competitive reasons.
Lambton 4 remains shut for planned work, leaving units 1 and 3 available.
The 1,976 MW Lambton station, which entered service in 1969, is located on the St. Clair River in St. Clair about 75 miles northeast of Detroit.
One MW powers about 1,000 homes in Ontario.
Separately, the Ontario government wants to shut all of the coal-fired generation in the province by the end of 2014 for health and environmental reasons.
OPG owns about 6,400 MW of coal-fired generation at four stations: Thunder Bay, Atikokan, Nanticoke and Lambton.
The Ontario Power Authority, responsible for ensuring an adequate supply of power, in August filed a 20-year, C$60 billion plan for the province's electricity system with the province's energy regulator, the Ontario Energy Board. That plan included the phase-out of the coal plants.
OPG owns and operates about 22,000 MW of generating capacity and markets power to utilities in Ontario and neighboring U.S. and Canadian electricity markets.
Reporting by Eileen O'Grady; Editing by Christian Wiessner