Project update – July 2023 Province releases Powering Ontario’s Growth plan Learn more

A powerful partnership

We're building the blueprint for the Marmora Project, a proposed clean energy hub featuring a 400-megawatt closed-loop hydroelectric pumped storage facility and up to 50-MW of renewable solar generation in the Municipality of Marmora and Lake. With enough clean energy to power up to 400,000 households when demand is at its highest, this innovative project could be the next made-in-Ontario solution to address our growing need for reliable electricity.

This eastern Ontario project is a joint venture between Ontario Power Generation (OPG) and Northland Power, and is currently progressing through a gated approvals process managed by the Independent Electricity System Operator.

Upcoming events

No posts found.

 Project overview

An illustration of the Marmora project carbon footprint

A battery made from nature

Learn more about Canada’s first closed-loop hydro storage project.  

An illustration of two people walking through a forest

We’re planning for a cleaner tomorrow

The Marmora Project could potentially displace between 70,000 and 140,000 tonnes of greenhouse gas emissions every year.

An illustration of a small town storefront

We plan to deliver long-term value

The Marmora Project is estimated to provide up to a $35-million annual economic benefit throughout eastern Ontario.