Ontario Power Generation

OPG News Release, April 16, 2005

April 16, 2005
Darlington Unit 4 Taken Off-Line for Maintenance

[Clarington]: Ontario Power Generation's Darlington Nuclear Unit 4 was taken off-line yesterday for a short maintenance outage.

The Unit 4 outage has been planned to improve the quality of steam entering the turbines. Additional work, such as removing zebra mussels from the unit's cooling water system, will also be completed during this outage.

Ontario Power Generation Inc. is an Ontario-based electricity generation company whose principal business is the generation and sale of electricity in Ontario. Our focus is on the efficient production and sale of electricity from our generation assets, while operating in a safe, open and environmentally responsible manner.

For more information contact:
Ontario Power Generation Media Relations
1-877-592-4008 or (416) 592-4008