Hydro One designated in priority construction of Ring of Fire transmission line – Electrical Business Magazine
February 2, 2026
The Government of Ontario has declared the Ring of Fire’s 230-kilometre Greenstone Transmission Line a priority project and designating Hydro One to develop and construct it.
The line will run from Nipigon Bay to the surrounding area of the Aroland Firs Nation; the gateway to the Ring of Fire. The project is expected to reach completion in 2032, and will provide the necessary capacity for unlocking an additional 350-700 megawatts of hydroelectricity and other power generation.
The 230 km single-circuit 230 kV transmission line is designed to support a second circuit and will run from the East-West Tie near Nipigon Bay, connect to a new station near the Longlac Transformer Station, and extend north to terminate at a new Switching Station in or near Aroland First Nation.
