Ontario Breaks Ground on New St. Clair Transmission Line

September 9, 2025

Ontario has officially broken ground on the 64-km St. Clair Transmission Line, a major infrastructure projects that supports the province’s plan to protect Ontario by securing provincial energy supplies, fuelling economic growth and creating good-paying jobs.

By 2028, the new 230 kV double-circuit line connecting Lambton County and Chatham-Kent will be complete, strengthening the grid and adding 450 MW of capacity, enough to power a city the size of Windsor.

Southwestern Ontario is thriving, and reliable energy is essential to keep that momentum going — this project will ensure the region has the power it needs to attract investment and keep projects on schedule.

The St. Clair Transmission Line is part of a network of electricity infrastructure projects that will support the regions’ economic growth and is also expected to create 70 new jobs during construction.  

Under the leadership of Premier Ford, our government is delivering on Ontario’s Integrated Energy Plan – Energy for Generations — building a stronger, self-reliant energy system that creates jobs and powers our economy for generations to come.