As of the end of the fourth quarter of 2011, the OPA had 21,039 MW of electricity supply capacity, based on average contract capacity, under contract. This included 10,380 MW of renewable energy, 7,659 MW of clean energy, and 3,000 MW of nuclear energy.
Within this 21,039 MW of supply capacity, 4,717 MW were procured from existing generating facilities, which required minimal or no new capital investment. The remaining capacity of 16,322 MW was procured from new development, expansion, redevelopment or refurbishment of existing facilities.
This represents more than $35.1 billion of new capital investment in generation in the Ontario electricity system since 2005.