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​About Ontario Po​wer Generation (OPG)

Ontario Power Generation (OPG), a successor company of the former Ontario Hydro, is 100 per cent owned by the Province of Ontario. Ontario Hydro was one of the founding members of COG’s predecessor, CANDev (CANDU Development) and formation of COG in 1984. OPG is one of the largest and most diverse clean power producers in North America and currently operates Darlington and Pickering Nuclear Generating Stations in addition to other assets, including a fleet of hydro-electric stations.

Pickering A station went into service in 1971 followed by Pickering B in 1983. Today, it continues to provide up to 20 per cent of the province’s electricity on any given day and is experiencing some of its best life-time performance.

Darlington is currently undergoing a refurbishment. One unit has been taken out of service while the other three continue to generate electricity. The refurbishment is expected to create 14,200 jobs per year and extend the life of the plant by 30 years.

OPG previously operated Bruce A and Bruce B Nuclear Generating Stations until May 2001 when they were leased to Bruce Power. OPG’s Darlington and Pickering Nuclear Stations together are capable of providing about 30 to 35 per cent of Ontario’s electricity needs.​

OPG is a voting member on COG’s Board of Directors represented by Carla Carmichael, Vice President, Project Assurance and Contact Management.



​10 units

​6618 MWe​

Contact Information​​

​WebsitePhone ​number​Address​
Main Switchboard: 
+1 416-592-2555

+1 877-592-2555
Corporate Head Office:
700 University Avenue
Toronto, Ontario
Canada, M5G 1X6