Rio Tinto’s Diavik diamond mine has received the Towards Sustainable Mining (TSM) Environmental Excellence Award for its pioneering solar power plant — the largest off-grid solar installation in Canada’s territories.
Commissioned in July 2024, the 3.5-megawatt facility comprises 6,620 bi-facial panels and is designed to supply up to 25% of the mine’s power needs during its closure phase, set to begin in 2026. The plant generates around 4.2 million kilowatt-hours annually, reducing diesel consumption by 1.1 million litres and lowering carbon emissions by approximately 2,900 tonnes — equivalent to taking 630 cars off the road.
Matthew Breen, Chief Operating Officer, Diavik Diamond Mine, said, “This recognition reflects our commitment to environmental responsibility and collaboration with our partners. The project demonstrates the potential for large-scale renewable energy in Canada’s North.”
The solar plant was developed in partnership with Yukon-based contractor Solvest and the Tlicho Investment Corporation, the business entity of one of Diavik’s Indigenous partners. The bi-facial panels capture energy from both direct sunlight and reflected light, making them ideal for snowy, cold climates. They also produce up to 10% more energy and operate 15% more efficiently at –25°C compared to warmer temperatures.
As the mine prepares for closure, Rio Tinto is exploring ways to relocate the solar facility to benefit other Northern communities, extending its environmental impact well beyond Diavik’s lifespan.