Hydro One to Deliver Red Lake Grid Expansion with New Transmission Line
The government of Ontario has approved a major transmission and substation expansion project in the Red Lake region, aimed at strengthening electricity infrastructure and supporting rising industrial demand.
The Red Lake Transmission Project includes the development of a 162 km double-circuit 230 kV transmission line, connecting key substations between Dryden, Ear Falls, and Red Lake. The project will also involve upgrades to associated transformer stations and switching infrastructure, forming a critical backbone for the regional grid.
The province has designated Hydro One as the developer and constructor of the project, fast-tracking regulatory approvals by classifying it as a priority infrastructure investment.
Once completed, the project is expected to add approximately 400 MW of new transmission capacity, nearly quadrupling existing supply in the region.
The expansion is designed to address rapidly growing electricity demand, particularly from the mining sector. Demand in the Red Lake region could increase from around 120 MW today to more than 750 MW by 2050, driven by new mining developments and industrial activity.
Substations play a central role in the project, acting as key nodes that transform and distribute electricity across the network. Upgrades to facilities such as the Dryden Transformer Station, Ear Falls Transformer Station, and Red Lake Switching Station will be essential to ensure stable power delivery and enable future grid expansion.
The project is expected to be in service in the early 2030s, forming part of Ontario’s broader strategy to modernise its electricity system and improve energy security in northern regions.
In addition to infrastructure benefits, the development is projected to support over 5,800 jobs and unlock approximately $830 million in economic potential, highlighting its importance for regional growth.
A key feature of the project is its partnership model with Indigenous communities, allowing participating First Nations to take up to a 50% equity stake in the transmission line component.
More broadly, the Red Lake project reflects a growing trend across North America, where utilities are investing heavily in transmission lines and substation upgrades to support electrification, resource development, and the integration of new energy sources.
Source: power-technology.com
