The Durham Region is officially home to the fastest-growing electricity demand in Ontario, prompting a massive new infrastructure project to keep the lights on. Hydro One has announced plans for a 45-kilometre, 500-kilovolt transmission line that will span the lakeshore from the Bowmanville Switching Station in Clarington to the Cherrywood Transformer Station in Pickering. This “power artery” is designed to funnel 1,000 megawatts of electricity into the western GTA, supporting the unprecedented residential and industrial growth currently sweeping through the region.
Meeting the Demand of a Growing Region
The project, dubbed the Bowmanville to East GTA Line, is a direct response to provincial growth mandates. Sonny Karunakaran, Vice-President of Strategic Projects for Hydro One, highlighted that electricity needs in the east GTA are rising faster than anywhere else in Ontario. To stay ahead of the curve, the utility is investing now to ensure the grid can handle the influx of new housing developments and commercial expansions.
The new line will be built entirely within existing hydro corridors to minimize the impact on local neighborhoods. However, residents can still expect significant construction activity, including the installation of new high-voltage structures and updated grid infrastructure. Once operational—targeted for 2032—the line will provide enough power to support hundreds of thousands of homes.
A “Greater Expansion” for Durham’s Grid
This project does not stand alone. It is part of a multi-billion dollar “greater expansion” of Ontario’s energy grid. The Bowmanville to East GTA Line will work in concert with the recently announced Durham-Kawartha Power Line, which is currently being constructed to move electricity from Clarington toward Peterborough by 2029.
By linking these major stations, Hydro One is creating a reinforced “energy loop” across the Durham Region. This ensures that even if one section of the grid faces an outage or high demand, power can be rerouted efficiently from Bowmanville to Pickering and beyond, providing a more resilient service for local businesses and families.
Public Consultations in April 2026
Because this project involves a decade of planning and construction, Hydro One is inviting the public to weigh in through a series of open houses across the region this month. These sessions offer residents in Ajax, Whitby, and Clarington a chance to view detailed site plans and speak directly with project engineers.
Upcoming Open House Schedule:
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Ajax: April 14, 4:00 p.m. – 8:00 p.m. at the McLean Community Centre.
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Solina (Clarington): April 15, 4:00 p.m. – 8:00 p.m. at Solina Community Hall.
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Brooklin (Whitby): April 23, 4:00 p.m. – 8:00 p.m. at the Brooklin Community Centre.
For those unable to attend in person, Hydro One has launched a dedicated portal on its website for digital feedback. As the Durham Region continues its transformation into a provincial economic powerhouse, this transmission project represents the literal “wiring” of that future success.
