Hydro Ottawa component phase two: September 2025 - April 2026
Demand for electricity in Ottawa continues to grow and electricity needs in the community are increasing due to planned residential and commercial development. To ensure power is available for customers now and in the future, Hydro One Network Inc. is modernizing its Merivale Transformer Station (TS). Merivale TS is one of two major transformer stations that supply approximately 60 per cent of power to customers across Ottawa, including to Hydro Ottawa. Overall, the project will include a station expansion to increase capacity and the replacement of aging existing infrastructure.
What will Hydro Ottawa’s portion of the project include?
As part of the overall project, Hydro Ottawa will:
- Replace eight poles
- Replace 12 anchors
- Install three maintenance holes and approximately 280m of new underground structure
Important notice: Temporary 24/7 construction and noise exemption
Please be advised of a temporary change to the construction schedule for the Merivale Transformer Station Modernization project.
To facilitate critical infrastructure installation, Hydro Ottawa and our contractors, Bradley Kelly Construction Ltd. and Marathon Underground, will be conducting continuous operations.
Work schedule:
- Start: November 24 at 6 a.m.
- End: November 30 at 6 a.m.
- Duration: Crews will be working 24 hours a day during this specific timeframe.
Nature of work and impacts
This period of continuous work is necessary to complete pipe ramming for new underground infrastructure located underneath the CN railway tracks. Due to the nature of this activity, residents in the area may experience construction noise outside of typical work hours.
A noise exemption for this 24/7 work period has been granted by the City of Ottawa.
We recognize that overnight construction noise can be disruptive and appreciate your patience as we modernize our infrastructure to ensure reliable service.
How will this project benefit Hydro Ottawa customers?
- Improved reliability of the electricity grid to prevent longer unplanned outages in the future
- Reduced impact of equipment failure
- Limited effect of system issues
- Renewed aging assets across the community
- Meet a growing demand for electricity in the community
If you have questions about the project, please email us at [email protected] (Community Relations).