Northeast Ontario

Northeast Power Line

Ontario's electricity demand is increasing. To meet this need, Hydro One is investing in critical infrastructure to support growth for northeast Ontario.

Once built, the Northeast Power Line will bring additional capacity to the region, and support economic development and reliability.

Current project phase: Planning

Expected completion date: 2029

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Project map Open house information Project notices

Building a stronger grid for Ontario's future

Project 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 strengthen 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 support the growing electricity demands of industries, businesses and residents.

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Partnership with purpose

Building as partners

Hydro One and First Nation partners are supporting growth in Ontario. Together, we are building a more self-reliant and secure grid and advancing meaningful action on reconciliation.

Learn more
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Visit an open house near you

Current open houses

Wharncliffe

Wednesday, November 18

4 to 7 p.m.

Wharncliffe Community Hall, 4847 ON-129

Get directions

Elliot Lake

Wednesday, November 18

4 to 7 p.m.

Royal Canadian Legion Branch 561, 10 Alberta Road.

Get directions

Hanmer

Thursday, November 19

4 to 7 p.m.

Hanmer Centennial Community Hall, 4333 Centennial Drive.

Get directions

See the project study area

Project map

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 Download map (PDF)
Project map

See what's coming

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
Fall 2026
Community drop-in sessions
January 2027
Anticipated section 92 approval from the Ontario Energy Board
2027
Construction start
2029
Proposed line in-service.
*Dates are subject to change.

Guided by standards

Planning process

The environmental process for this project has involved the completion of several technical studies as well as engagement with Indigenous communities, government agencies, interest groups and interested community members. The findings are published in an Environmental Report. On October 22, 2025 the Ministry of the Environment, Conservation and Parks published a new, project-specific regulation, that allows the project to proceed upon fulfillment of the regulatory conditions. All subsequent project permitting and approval requirements remain.

For more information, please see ERO number 025-0838 at ERO.Ontario.ca

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What we shared

Public consultation documents

Final Environmental Report resources

July 2026

Draft Environmental Report resources

February 2026

Community resources

November 2025

July 2024

March 2024

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What these documents mean

These documents summarize the studies, project notices and resources shared during the consultation process. They explain how routes were evaluated, decisions were made and how we engaged with communities.

Answers at a glance

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.

Contact us

We're here to help

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

1-877-345-6799

Land acknowledgement

Hydro One acknowledges that the Northeast Power Line 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.

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