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Northeastern Ontario

Northeast Power Line

At Hydro One, we support communities and businesses across Ontario and the growing need for safe and reliable power.

Current project phase: Draft Environmental Report (ER) comment period

Expected completion date: 2029

We want to hear from you

The draft Environmental Report is now available for your review and comment from Monday, February 2 to Thursday, March 19, 2026.

Comment on the draft ER
Boy sitting on a dock overlooking water

Overview

We're dedicated to fostering growth in northeast Ontario. Once built, the Northeast Power Line will meet the increasing demand for energy that is driven by innovation and economic development. This new line will bring more power to the region and improve the overall resilience of the northern Ontario transmission network.

When completed, the 500-kilovolt line between Hanmer Transformer Station (TS) in Greater Sudbury and Mississagi TS near Wharncliffe will reinforce the transmission system in northeast Ontario and support the growing electricity demands of industries, businesses and residents.

We’re here to help you

To provide comments or to be added to the project contact list, please call or email:

1-877-345-6799

Project details

The Northeast Power Line will extend from Hanmer TS in Greater Sudbury to Mississagi TS near Wharncliffe within an existing transmission corridor.

View interactive map
Project map

Our planning process

We will complete the planning and development of this new transmission line following an existing, approved environmental assessment (EA) from Hanmer TS to Mississagi TS. We've conducted field studies, including archaeology and natural heritage surveys, along the transmission corridor where findings will be included in the Environmental Report.

Learn about the EA Process
People sitting together talking

Our anticipated project schedule

March 2024
Announcement of the updated environmental requirements. Community open house #1: Introduction of project and presentation of route.
Fall 2025
Complete field studies. Community open house 2.
Feb 2 – Mar 19, 2026
Draft Environmental Report public review period
Spring 2026
Submit Final Environmental Report and Leave to Construct
Spring 2027
Approval from Ontario Energy Board (Leave to Construct approval)
2027
Construction start
2029
Proposed line in-service.
*Dates are subject to change.

Public Consultation documents

Draft Environmental Report (ER)

The 45-day review and comment period for the draft Environmental Report is now open.

Start date: February 2, 2026 - End date: March 19, 2026

Hydro One values community input and will carefully consider all comments. Any concerns raised will be addressed before the Environmental Report is finalized and submitted to the Ministry of Environment, Conservation and Parks (MECP). Once complete, the final ER will be posted here.

Draft Environmental Report resources

Download the draft Environmental Report
Download the draft Environmental Report appendices

Notice of community open house #2

Download the notice of community open house #2 (aussi disponible en français)

Announcement of environmental update - March 2024

Download the announcement of environmental update (aussi disponible en français)

Open house resources

November 2025
Download the in-person open house panels
Download the in-person open house panels (français)
Download the open house full route map
Download the table map (Tile 1)
Download the table map (Tile 2)
Download the table map (Tile 3)
Download the table map (Tile 4)
Download the table map (Tile 5)
Download the table map (Tile 6)
July 2024
Download the Wharncliffe in-person open house panels
Download the Hanmer Transformer Station expansion map
Download the Hanmer Transformer Station area map

March 2024
Download the in-person open house panels (aussi disponible en français)
Download the indigenous relations panels

Frequently asked questions

What is the route for Northeast Power Line?

Hydro One is planning to construct a new 500 kilovolt transmission line within an existing right of way between our Hanmer TS and Mississagi TS. The new transmission line will be constructed in parallel to an existing transmission line already in operation within this corridor.

How long is the proposed line?

The new Northeast Power Line is approximately 205 km long.

Land acknowledgement

Hydro One acknowledges that the Northeast Power Lline is proposed on the ancestral lands of the [Robinson Huron Treaty Territory, signed with the Anishinaabe Nation] and is now home to many diverse First Nations, Inuit and Métis people. Hydro One understands that Indigenous Nations have been here since time immemorial and are stewards of what many refer to as Turtle Island. We are all Treaty People and with a commitment to friendship and our pursuit of reconciliation, we are thankful to be welcomed on these lands as partners so we can improve on our past and energize our combined futures.

To provide comments or to be added to the project contact list, please connect with us

1-877-345-6799 Email

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