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Waasigan Transmission Line Project Logo
Hydro One has been powering homes and businesses in northwestern Ontario for more than 70 years. Our crews live and work in your community, and work tirelessly to build and maintain the electricity grid.

We are dedicated to continue calling the northwest our home and be your trusted community partner. At Hydro One, we want to be ready to support the continued growth of the region, which is why we are investing in the developmental work for the Waasigan Transmission Line now.


Project Overview

The Waasigan Transmission Line is a proposed new double-circuit 230 kilovolt (kV) transmission line between Lakehead Transformer Station (TS) in the Municipality of Shuniah and Mackenzie TS in the Town of Atikokan, and a new single-circuit 230 kV transmission line between Mackenzie TS and Dryden TS in the City of Dryden.  

There are a host of mining and forestry activities in the region that play a key role in driving economic growth in the northwest and in the communities who support them. Building the Waasigan Transmission Line will increase the amount of electricity that can flow through system and provide local businesses and communities the electricity they need to grow. Waasigan is a critical link in the expansion of the transmission network in northwest.


Waasigan Study Area Map
Click to enlarge


Timeline: Public and Stakeholder Consultation for the Environmental Assessment

  • April 2019
  • Notice of commencement of the Terms of Reference for the Environmental Assessment

  • Spring 2019 -
    Spring 2020
  • Consultation, data collection, and development of corridor alternatives

  • Mid-2020
  • Draft Terms of Reference review

  • Fall 2020
  • Proposed Terms of Reference submitted to the Ministry of the Environment, Conservation and Parks

  • Dec 2020 -
    Jan 2021
  • Terms of Reference approved by Ministry of the Environment, Conservation and Parks

  • Jan 2021
  • Notice of Commencement of Environmental Assessment

  • 2021 - 2022
  • Consultation and data collection on Environmental Assessment study areas

  • 2022
  • Draft Environmental Assessment review

  • 2022
  • Leave to Construct (Section 92) application submission*

  • 2023/2024
  • Decision on Environmental Assessment by Ministry of the Environment, Conservation and Parks

  • 2023/2024
  • Leave to Construct (Section 92) application approval

  • By end
    of 2024
  • Complete development work

*Leave to Construct under Section 92 of the Ontario Energy Board Act is a regulatory process to obtain approval from the OEB to build and operate a transmission line. Hydro One will not apply for this approval until direction is received by the IESO to proceed with the project.

NOTE: All dates are anticipated and could change based on project feedback.

image of the Waasigan project Orthographic Map


View maps related to this project here.

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Project Approvals

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Public Consultation

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Working with Indigenous Communities

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Project Approvals

The need for this project has been identified by the Independent Electricity System Operator (IESO) through their long term electricity planning. Hydro One believes that bringing power to northwestern Ontario is important for supporting future economic growth in the region. The Waasigan Transmission Line will undergo an Environmental Assessment (EA) under the Ontario Environmental Assessment Act.

The Environmental Assessment Process

This EA will be carried out in accordance with the requirements of the Ontario Environmental Assessment Act. The first step is the preparation of a Terms of Reference (ToR) which will set out the framework and work plan for addressing these requirements when preparing the EA, including an outline of the studies and consultation activities that will be carried out. Important aspects of the EA process will be to identify and evaluate alternative routes, assess potential effects of the new transmission line and determine measures to reduce or mitigate these effects.

The anticipated completion date for the ToR mid- 2020, at which point it will be submitted to the Minister of the Environment, Conservation and Parks for review and decision. If approved by the Minister, the EA will then proceed as outlined in the approved ToR.

Public Consultation

We want to hear from the public to ensure that our project delivers tangible benefits to local communities.

Check back for updates on our next round of drop-in Community information Centres.

Working with Indigenous Communities

Development work for the Waasigan Transmission Line is founded on open, respectful and collaborative consultation with communities.

Together with Indigenous communities in the project area, Hydro One is exploring and discussing project details and potential benefits the Waasigan Transmission Line can bring.

Hydro One's Indigenous engagement process is designed to provide relevant project information to Indigenous communities proximate to the project in a timely manner.

Contact Us

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

Tel: 1-877-345-6799