New proposed regulation regarding Environmental Assessment Act requirements for the Proposed Northeast Power Line Project

ERO number
025-0838
Notice type
Regulation
Act
Environmental Assessment Act, R.S.O. 1990
Posted by
Ministry of the Environment, Conservation and Parks
Notice stage
Decision
Decision posted
Comment period
July 31, 2025 - September 14, 2025 (45 days) Closed
Last updated

This consultation was open from:
July 31, 2025
to September 14, 2025

Decision summary

A new regulation has been made under the Environmental Assessment Act (EAA) that sets out requirements Hydro One Networks Inc. (Hydro One) will need to undertake to proceed with the Northeast Power Line Project (Project) and for the EAA not to apply to the Project. Hydro One is collaborating with a consortium of First Nations partners.

Decision details

A new regulation has been made under the EAAOntario Regulation 234/25 (Northeast Power Line Project) – that sets out requirements through a number of conditions that Hydro One needs to satisfy before proceeding with the Project, which involves:

  • establishing a new transmission line between the Hanmer and Mississagi transformer stations within an existing transmission corridor
  • changes and upgrades to the two transformer stations

Additionally, the regulation provides that the EAA does not apply to certain related undertakings (as described below). The regulation does not provide for any requirements related to these undertakings.

Hydro One is working in collaboration with Waasmoowin Energy Inc., a consortium of First Nation partners, on the Project.

The conditions that Hydro One is required to satisfy before proceeding with the Project are:

  • Preparing a draft Environmental Report that must include:
    • A description of:
      • the project
      • an assessment of the potential impacts of constructing the transmission line on specified environmental matters, which include; archaeological resources, terrestrial and wetland vegetation, fish and fish habitat, and any other matter identified by Hydro One
      • measures to be taken to mitigate the potential negative impacts identified in the assessment of impacts in the paragraph above
    • a consultation record that includes a summary of the consultation carried out by Hydro One with Indigenous communities, and as applicable, other interested persons in respect of the Project since March 1, 2024
    • a summary of any comments and concerns raised by Indigenous communities, and responses provided by Hydro One to the communities describing how concerns will be addressed
  • ensuring Indigenous communities identified by the Ministry of Energy and Mines (MEM) whose constitutionally protected Aboriginal or treaty rights may be adversely impacted by the Project have been consulted on the Project (consultation carried out by Hydro One with such communities prior to the regulation may be relied on by Hydro One)
  • publishing the draft Environmental Report on Hydro One’s website, providing notice of the draft report, including to Indigenous communities identified by MEM, and providing at least 45 days for review and comment
  • following expiry of the review and comment period, giving written notice to the Ministry of the Environment, Conservation and Parks (MECP) specifying whether or not any concerns in respect of adverse impacts on constitutionally protected Aboriginal or treaty rights were raised by Indigenous communities during the review and comment period and, how the concerns have been or will be addressed
  • complying with any consultation direction issued by the MECP Minister in preparing the draft or final Environmental Report and any mitigation or prevention direction in preparing the final Environmental Report and in proceeding with the Project. Such direction by MECP may be given at any time up until the expiry of the waiting period (30 days) that follows Hydro One publishing the final report on its website. The MECP Minister may extend or shorten this waiting period in certain circumstances set out in the regulation
  • preparing the final Environmental Report, taking into consideration comments received on the draft report and complying with any direction provided by the MECP Minister, publishing the report on Hydro One’s website, and providing notice of the report

The regulation also includes an addendum process to address changes to the Project that may be proposed after the final Environmental Report is published. The addendum process sets out that Hydro One is to determine if a proposed change is significant by forming an opinion based on criteria specified in the regulation.

If determined by Hydro One to be a significant change, the regulation sets out similar requirements for a draft and final addendum for the change as for the draft and final Environmental Report, including with respect to: content of the addendum; providing an opportunity for review and comment on a draft addendum; complying with any direction that may be given by the MECP Minister regarding consultation with Indigenous communities whose constitutionally protected Aboriginal or treaty rights may be adversely impacted by the change and regarding preventing or mitigating such impacts. Hydro One must wait for 30 days, or such other period of time as may be specified by the MECP Minister, before proceeding.

If determined by Hydro One to not be a significant change, the regulation requires that a final addendum, describing the change and the basis for determining that the change is not significant, be published on Hydro One’s website and notification of the addendum’s publication be provided to Indigenous communities. The list of communities must be obtained from MEM and is to include communities that MEM has identified as having constitutionally protected Aboriginal or treaty rights that may be adversely impacted by the change. Hydro One must wait for a period of 30-days, or such longer period as may be specified by the MECP Minister, before proceeding with the change. During the waiting period, the MECP Minister may issue a direction to Hydro One regarding measures to mitigate or prevent any such impacts. The MECP Minister may extend the waiting period where concerns about potential adverse impacts on constitutionally protected Aboriginal or treaty rights have been raised by an Indigenous community during the waiting period. If no direction is issued, Hydro One may proceed with implementing the change at the end of the waiting period.

The Project is required to be carried out in accordance with the final Environmental Report, any final addenda and any direction given by MECP in respect of mitigating or preventing potential adverse impacts on constitutionally protected Aboriginal or treaty rights.

If all of the above requirements are satisfied, the Project would be exempt from the EAA.

In addition, the regulation unconditionally exempts the following from the EAA:

  1. Acquisition of lands and property by Hydro One for the Project.
  2. Undertakings that are subject to the Class Environmental Assessment for MNR Resource Stewardship and Facility Development Projects that are for or related to the Project.

The regulation was filed on October 22, 2025, and it comes into effect on filing.

Comments received

Through the registry

2

By email

12

By mail

0
View comments submitted through the registry

Effects of consultation

Public consultation

Consultation on the regulatory proposal took place from July 31 to September 14, 2025. During this time, a notice about the proposal was posted on the Environmental Registry of Ontario (ERO) and Regulatory Registry for a 45-day public review and comment period.

We received two comments through the ERO. One comment was not relevant to the regulatory proposal, while the other was generally critical of the regulatory proposal, indicating that the ERO notice did not provide sufficient information about what the proposed regulation would contain and questioned whether the proposed regulation would be as protective of the environment as typical EAA requirements for a project of this type would have been.

MECP considers the level of detail provided in the ERO notice to be sufficient for informing the public about the regulatory proposal. The regulation outlines a number of requirements related to assessing potential negative impacts on the environment in relation to certain matters set out in the regulation and mitigation of any such impacts, as well as public notice and Indigenous consultation requirements. The regulation also allows MECP to provide additional direction to Hydro One in relation to consultation with Indigenous communities and mitigation and prevention of any potential adverse impacts to constitutionally protected Aboriginal or treaty rights. Furthermore, the regulation will help get a critical transmission infrastructure project built while maintaining environmental protections.

Indigenous consultation

MECP, in collaboration with MEM and Hydro One, also consulted directly with Indigenous communities whose constitutionally protected Aboriginal or treaty rights may be adversely impacted by the Project. Each community received notifications and information about the proposed regulation. The MECP also hosted a webinar on August 14, 2025, for Indigenous communities to learn about the regulatory proposal and provide comments. In addition, each Indigenous community was offered an opportunity for individual meetings to discuss the proposal directly with MECP, with the option of MEM and Hydro One also participating in the meeting, and MECP granted all requests received for such a meeting and met with the communities.

At the webinar, communities had questions about the mechanics of the proposed regulation, which were explained in greater detail by MECP. A concern was also raised, directed to Hydro One, about the company’s use of glyphosate (herbicide) to control vegetation around the existing line and the future line (i.e. the Project) once operational. Hydro One acknowledged the concern and advised the communities that they will arrange a separate meeting to discuss this item and find a resolution to the concern.

Several Indigenous communities asked to submit their written comments to the MECP after the September 14, 2025 comment period end date. MECP accommodated all of these requests for additional time and accepted comments submitted in writing and comments shared during meetings with community representatives that took place after the ERO comment period end date.

Eight letters of support for the proposal and the Project were received from Indigenous communities and one letter of support was received from Waasmoowin Opportunities and Consultation Council.

One Indigenous community expressed concerns about the Project and regulation proposal, citing potential impacts of the Project on Aboriginal and treaty rights; insufficient time (30 days) in the proposed regulation to review and comment on reports; loss of features typically provided for under the Transmission Facilities Class EA, such as an alternatives assessment and a broad environmental effects assessment, as well as removal of section 16 order provisions enabling elevation to a Comprehensive EA.

Another Indigenous community requested that the regulation proposal be changed in several ways, including by: requiring the preparation of a Traditional Knowledge and Land Use report, incorporating Indigenous-specific considerations into the addendum process for project changes, extending the 30 day review and comment period for reports required by the proposed regulation, requesting Crown oversight in the assessment of the Project, and requesting that MECP provide a formal decision with reasons addressing any concerns/challenges raised by Indigenous communities.

All comments received from Indigenous communities were carefully considered as part of the decision-making process and where appropriate, changes were made to the regulation proposal as a result of the comments. For example:

  • in response to the concerns from communities about the 30 days provided in the proposed regulation to review and comment on reports, changes were made to the regulation proposal to extend the review and comment period for the draft Environmental Report and draft addendum for significant changes by an additional 15 days (i.e., 45 days total)
  • in response to comments about the need for Crown oversight on the Project, the timeframe within which the MECP Minister may intervene by issuing a direction in respect of the Project or significant changes has been extended from 30 days following the notice of Indigenous concerns to 30 days following the publishing of the final Environmental Report or final addenda, as the case may be.

Supporting materials

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Contact

Nick Colella

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Office
Environmental Assessment and Permissions Branch
Address

135 St Clair Avenue West
1st floor
Toronto , ON
M4V1P5
Canada

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Original proposal

ERO number
025-0838
Notice type
Regulation
Act
Environmental Assessment Act, R.S.O. 1990
Posted by
Ministry of the Environment, Conservation and Parks
Proposal posted

Comment period

July 31, 2025 - September 14, 2025 (45 days)

Proposal details

A new regulation is being proposed under the Environmental Assessment Act (EAA) that would, if made, set out requirements through a number of conditions that Hydro One Networks Inc. (Hydro One) would need to satisfy before proceeding with the Northeast Power Line Project (Project), which involves:

  • establishing a new transmission line between the Hanmer and Mississagi transformer stations within an existing transmission corridor
  • changes and upgrades to the two transformer stations

Additionally, the proposed regulation would also provide that the EAA does not apply to certain related undertakings (as described below). The regulation would not provide for any requirements related to these undertakings.

Hydro One is working in collaboration with Waasmoowin Energy Inc., a consortium of First Nation partners, on the Project.

The proposed conditions that Hydro One would be required to satisfy before proceeding with the Project are as follows:

  • preparing a draft Environmental Report that must include:
    • a description of:
      • the Project
      • the assessment of the potential impacts of constructing the transmission line on specified environmental matters, which include archaeological resources, terrestrial and wetland vegetation, fish and fish habitat, and any other matter identified by Hydro One
      • measures to be taken to mitigate the potential negative impacts identified in the assessment of impacts in the paragraph above
    • a consultation record that includes a summary of the consultation carried out by Hydro One with Indigenous communities, and as applicable, other interested persons in respect of the Project since March 1, 2024.
    • a summary of any comments and concerns raised by Indigenous communities, and responses provided by Hydro One to the communities describing how concerns will be addressed.
  • Ensure Indigenous communities identified by the Ministry of Energy and Mines (MEM) whose constitutionally protected Aboriginal or treaty rights may be adversely impacted by the Project have been consulted on the Project (consultation carried out by Hydro One prior to the regulation may be relied upon to satisfy this requirement).
  • Publishing the draft Environmental Report on Hydro One’s website for at least 30 days for review and comment and providing notice of the draft report, including to Indigenous communities identified by MEM.
  • Following expiry of the review and comment period, giving written notice to the Ministry of the Environment, Conservation and Parks (MECP) specifying whether or not any concerns in respect of adverse impacts on constitutionally protected Aboriginal or treaty rights were raised by Indigenous communities during the review and comment period and, how the concerns have been or will be addressed.
  • Complying with any direction provided by MECP regarding consultation with Indigenous communities whose constitutionally protected Aboriginal or treaty rights may be adversely impacted by the Project and regarding preventing or mitigating such impacts. Such direction by MECP may be given at any time up until 30 days after MECP receives Hydro One’s written notice of concerns, unless MECP shortens or extends that 30-day period.
  • Preparing the final Environmental Report, taking into consideration comments received on the draft report and any further consultation with Indigenous communities undertaken and reflecting any direction provided by MECP and what Hydro One has done in response to the direction, and publishing the report on Hydro One’s website, and providing notice of the report.

The proposed regulation will also include an addendum process to address changes to the Project that may be proposed after the final Environmental Report is published. The addendum process will include considerations that Hydro One must take into account in determining whether a change is significant.

  • If determined by Hydro One to be significant, the proposed regulation would set out similar content requirements for a draft and final addendum for the change as for the draft and final Environmental Report, and requirements for providing an opportunity for review and comment on a draft addendum, including the direction that may be given by MECP regarding consultation with Indigenous communities whose constitutionally protected Aboriginal or treaty rights may be adversely impacted by the change and regarding preventing or mitigating such impacts.
  • If determined by Hydro One to be not significant, the proposed regulation would require that a final addendum, describing the change and the basis for determining that the change is not significant, be published on Hydro One’s website and notification of the addendum’s publication be provided to Indigenous communities whose constitutionally protected Aboriginal or treaty rights may be adversely impacted by the change, along with a copy of the addendum. If within 30 days of the notification of the addendum being published on Hydro One’s website, an Indigenous community notifies MECP in writing that despite Hydro One determining that the change is not significant, constitutionally protected Aboriginal or treaty rights may be adversely impacted by the change, MECP may give Hydro One direction, within a time limit, regarding consultation and measures to prevent or mitigate any impacts. If no direction is given, Hydro One may proceed with implementing the change.

The Project would be required to be carried out in accordance with the final Environmental Report, any final addenda and any direction given by MECP.

If all of the above requirements are satisfied, the Project would be exempt from the EAA.

In addition, the proposed regulation would unconditionally exempt the following from the EAA:

  1. Acquisition of lands and property by Hydro One for the Project;
  2. Undertakings that are subject to the Class Environmental Assessment for MNR Resource Stewardship and Facility Development Projects that are for or related to the Project.

Project Background:

An environmental assessment was completed by Ontario Hydro (whose transmission assets were subsequently conveyed to Hydro One after the restructuring of Ontario Hydro), and approval given in 1984 for two transmission lines in a common right-of-way between Mississagi transformer station and Hanmer transformer station.

The first of these two transmission lines was built shortly after the EA approval and is currently operational, while the second transmission line was not built.

In October 2022, the Independent Electricity System Operator (IESO) published its Need for Northeast Bulk Reinforcement report, which forecasted electricity demand in Northeastern Ontario to grow at a rapid pace over the next 10 years due to economic development priorities and electrification initiatives. To support this demand growth, the IESO recommended a new 500 kV transmission line running approximately 205 kilometers (km) from Hanmer transformer station (Greater Sudbury) to Mississagi transformer station (west of Sudbury), to be in-service by 2029.

Following consultation with Indigenous communities, in 2023, through Orders in Council and Directives, the government declared this Project a priority project under s. 96.1 (1) of the Ontario Energy Board Act, 1998 (OEBA) and directed the OEB, pursuant to s. 28.6.1 of the OEBA, to amend Hydro One’s licence conditions to require Hydro One to develop the Project.

Hydro One, in collaboration with Waasmoowin, a consortium of First Nation partners, and in consultation with Indigenous communities, proposes to proceed with establishing this line within the route that was identified in the EA approval (referred to in this posting as “Project”), i.e., paralleling the first line constructed. Recognizing the passage of time since the assessment of the line and approval in 1984 and as discussed with Indigenous communities, Hydro One committed to completing, and has commenced certain archaeological and other environmental studies to update its environmental work.

Purpose:

Given the priority nature of this Project and the lapse in time since the 1984 EA approval, the purpose of the new regulation is to:

  • Recognize the work that Hydro One, in collaboration with First Nation partners, has been undertaking in respect of the Project, including the preparation of an Environmental Report that will outline potential effects and mitigation.
  • Provide for consultation with Indigenous communities whose constitutionally protected Aboriginal or treaty rights may be adversely impacted by the Project.

The proposed new regulation would not remove the need to obtain all other necessary permits and approvals that may apply to this Project.

Regulatory Impact Assessment:

A new regulation, if made, sets out requirements through a number of conditions that Hydro One Networks Inc. (Hydro One) would need to satisfy before proceeding with the Northeast Power Line Project (Project). These conditions include consulting with Indigenous communities and preparing an environmental report that describes Hydro One’s assessment of impacts on specified environmental matters (as set out above). The proposal is anticipated to result in cost and time savings for Hydro One in respect of this priority project.

Supporting materials

View materials in person

Some supporting materials may not be available online. If this is the case, you can request to view the materials in person.

Get in touch with the office listed below to find out if materials are available.

Comment

Commenting is now closed.

This consultation was open from July 31, 2025
to September 14, 2025

Connect with us

Contact

Nick Colella

Phone number
Office
Environmental Assessment and Permissions Branch
Address

135 St Clair Avenue West
1st floor
Toronto , ON
M4V1P5
Canada

Office phone number