POWER GENERATION

As one of the largest producers of electricity in North America, Ontario Power Generation operates 65 hydroelectric, 5 fossil and 3 nuclear stations producing more than 21,000 megawatts of electricity.

In fact, OPG owns one of the most diversified, low cost and low emission portfolios in North America. Our commitment is to continually improve the efficiency of our generating stations so that Ontario has the power it needs, when it needs it.

In 2008, OPG generated about 70% of the electricity in Ontario or 107.8 terawatt hours (TWh). Our 2007 generation mix consisted of 45% nuclear, 34% hydroelectric and 22% fossil-fuelled electricity.

Nuclear Fleet Generating Capacity: 6,606 MW Stations: 3 2008 Output: 48.2 TWh Currently Generating: 4497 MW

Hydroelectric Fleet Generating Capacity: 6,963 MW Stations: 65 2008 Output: 36.4 TWh Currently Generating: 2006 MW

Fossil-Fuelled Fleet Generating Capacity: 8,177 MW Stations: 5 2008 Output: 23.2 TWh Currently Generating: -2 MW

Throughout 2008, the availability of our hydroelectric stations remained at consistently high levels, finishing the year at 94.2 per cent. This level of performance has not been achieved since 1984 when the fleet was much younger.

OPG’s nuclear production benefited from the outstanding performance of the Darlington generating station. The station achieved a capability factor of nearly 94.5 per cent in 2008. It also received its best ever peer review from the World Association of Nuclear Operators.

And, OPG’s fossil-fuelled stations continued to demonstrate impressive flexibility and responsiveness in 2008 when called upon to meet Ontario’s electricity needs.

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NOW GENERATING

MEGAWATTS

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