Power line

As demand for electricity in Ottawa continues to grow significantly over the next several years, Hydro One is modernizing its Merivale Transformer Station

As the population of Ottawa continues to grow, safe and reliable power is needed to improve reliability for homes and businesses. That’s why Hydro One is planning to modernize critical equipment at the Merivale Transformer Station (TS) located in the City of Ottawa, to ensure power is available for customers now and in the future. Merivale TS is one of two major transformer stations that supply approximately 60% of power to customers across Ottawa, including to Hydro Ottawa.

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Project Description

The need for this investment was identified in the Ottawa Area Integrated Regional Resource Plan, through a collective planning process which includes the Independent Electricity System Operator (IESO), Hydro One and Hydro Ottawa. Once this project it completed, the expanded station will support additional power to flow through the Merivale TS to approximately 20 Hydro Ottawa and Hydro One transformer stations connected to Merivale TS. We’re completing the planning stage now, so that we can be ready to bring sustainable, safe and reliable power to the City of Ottawa.

Project Map

Merivale Project Map TS Enlarge (.PDF)
Planning Process

Planning Process

We are committed to listening and incorporating your feedback into the planning stages of the Merivale TS Upgrade Project. This Project is subject to a Class Environmental Assessment for Minor Transmission Facilities – Class EA Screening Process, in accordance with the Ontario Environmental Assessment Act. Rooted in community engagement and consultation, the environmental assessment evaluates the Project to minimize social, economic and environmental effects.

Engagement with Indigenous leadership and communities, community members, municipalities, government agencies, interest groups and others through opportunities like community open houses is an important part of the environmental assessment and will help us identify the location for this needed electricity infrastructure, together.

Learn more about the Environmental Assessment

Public Consultation

Community Open House #2 - March 6, 2023

March 2023

Download the Community Open House Panels
Newspaper Ad: Ottawa Citizen
Newspaper Ad: Berhaven Independent

Community Open House #1 - November 15, 2022

November 2022

Download the Community Open House Panels
Newspaper Ad: Ottawa Citizen

Notice of Commencement for the Class Environmental Assessment

September 2022

Download the Notice of Commencement
Print Ads

Anticipated Project Schedule

September 2022
Notice of Commencement & newspaper advertisements
November 2022
Community Open House #1, Introduction of Project
December 2022
Class EA Screening Report submitted to the Ministry of Environment, Conservation, and Parks
Early 2023
Community Open House #2, Pre-construction updates
Spring 2023
Proposed construction start date
New equipment in service
Construction completed
NOTE: All dates are anticipated and could change based on project feedback.