Marmora Pumped Storage Project

Rank 2024


Image Credit: Municipality of Marmora

Industry Sector: Energy

Project Type: Hydroelectric

Project Value: $700 million

Funding Source: Private

Private Funding: $700 million

Province: Ontario

City / Region: Marmora

Estimated End Date of Substantial Completion: 2021

This 400 MW pumped storage project will make use of an abandoned water-filled openpit mine to store energy like a battery. Located on private land in Marmora, Ontario, the project will use low rate, off-peak energy to pump water into a raised reservoir, which will be constructed above the existing mine. During peak hours, when energy prices are higher, the water will be released into the mine through a hydroelectric turbine to generate electricity. In this way, excess electricity from non-controllable sources like solar and wind generators can effectively be stored for any desired period of time.

Although pumped storage technology is new to Canada, it has been in use in Europe, the United States, and Japan since at least the 1960s. The project is endorsed by the County, Township, and many local residents. The development phase of the project continues as Ontario’s energy supply remains an important area of infrastructure development.

Northland Power continues to work with the Independent Electricity System Operator to secure an energy services contract. They hope to complete the project by 2021.

Project Owner: Northland Power

Other Key Players: SNC-Lavalin

Legal: Borden Ladner Gervais LLP (legal advisor)

2018 Rank: 69

2017 Rank: 65

2016 Rank: 67

2015 Rank: 69

2014 Rank: 69