Ontario Power Gen

With 66 hydroelectric stations and 239 dams across 24 river systems, OPG’s hydro fleet is both far-reaching and complex.

In our “How It Works” series, learn how we manage water flows across these facilities to support safe, efficient operations for Ontario.

Managing water flows safely and efficiently requires coordinated teamwork and real-time monitoring. It’s work that OPG employees are proud to carry out around the clock, year-round – from Kapuskasing to Kenora, and from Niagara to Cornwall.

For more than a century, Big Chute Generating Station has been harnessing the power of the Severn River.
First placed into service in 1909, the station originally operated with four generating units and was one of the earliest hydroelectric developments on the river system. It was also the first generating station owned and operated by OPG’s predecessor company, Ontario Hydro, which acquired the facility in 1919.
Following a complete rebuild in 1993, the station now operates as a single-unit facility capable of generating 10 megawatts of clean, renewable electricity. Located beside the world-famous Big Chute Marine Railway – the only operating marine railway of its kind in North America – the station remains part of a destination enjoyed by boaters, campers, cottagers, and visitors exploring the Trent-Severn Waterway.
More than 115 years after it first began generating power, Big Chute continues its legacy of delivering electricity while standing as a reminder of Ontario's rich hydroelectric heritage.

Today, the next generation got an up-close look at how Ontario is powered during Take Our Kids to Work Day at OPG.
We were delighted to welcome curious young people and give parents the chance to share what they do each day. Students learned how OPG generates clean, reliable electricity and met some of the people and technology that help power Ontario around the clock.
Thank you to all the students who joined us and to our OPG employees for answering questions, sharing their work, and inspiring the energy leaders of tomorrow.

We’re giving new life to our 106-year-old Cameron Falls Generating Station, located near Thunder Bay.
Happening now: The facility’s G7 unit is undergoing a major refurbishment, including the installation of new generator windings, a new runner, and rehabilitation of the existing turbine shaft – its first overhaul in more than 30 years. These upgrades will ensure about 25 more years of clean, reliable generation.
Unit by unit, OPG continues to breathe new life into Ontario’s long-serving hydroelectric stations – an investment that will ensure clean power keeps flowing for our future. Learn more: bit.ly/4z3lOOT

As we mark Treaties Recognition Week, we reflect on the enduring importance of Treaty rights and reaffirm our shared responsibility as a company. At OPG, we are committed to building respectful relationships with Indigenous Nations and communities – grounded in listening, learning, and meaningful collaboration – as we continue to strengthen relationships and advance reconciliation.