Enbridge Pipelines (NW) Inc. – Line 21 Segment Replacement Project

What’s New

  • January 25, 2018 – NEB approves Line 21 Segment Replacement Project
  • October 27, 2017 – Here is the transcript from yesterday’s oral hearing [Filing A87283]
  • May 19, 2017 – NEB issues Hearing Order [Filing A83697]
  • March 10, 2017 – Enbridge files application with NEB [Filing A82026]

Project Information

On March 10, 2017, Enbridge Pipelines (NW) Inc. applied to the National Energy Board to replace a section of its Line 21 Pipeline, also known as the Norman Wells Pipeline. Enbridge plans to install up to 2.5 kilometres of new 323.9 (NPS 12) pipeline under the Mackenzie River. The new pipe will be installed using a trenchless crossing method called horizontal directional drilling (HDD).

Enbridge is also requesting permission to decommission the section of pipeline that is being replaced.

The company plans to transport the necessary equipment and materials to the worksite by truck and barge and to carry out the proposed activities within the existing right of way.


This map provides an overview of the Project.

Review of the project

Key milestones

List of Issues 

The Board has identified the following issues for consideration with respect to this project:

  1. The need for the Project
  2. The economic feasibility of the Project.
  3. The potential commercial impacts of the Project.
  4. The potential environmental and socio-economic effects of the Project, including those detailed in the NEB’s Filing ManualNote 1
  5. The appropriateness of the general route and land requirements for the Project.
  6. The suitability of the design of the Project.
  7. Potential impacts of the Project on Aboriginal interests.
  8. Potential impacts of the Project on land users.
  9. Contingency planning for product release, accidents or malfunctions, during construction and operation of the Project.
  10. The suitability of the decommissioning plan for the existing Line 21 pipeline, including whether the decommissioning is appropriately an interim step to eventual abandonment or whether it is the final step in the pipeline’s lifecycle.
  11. Safety and security during construction and operation of the Project, including emergency response planning and third-party damage prevention.
  12. The terms and conditions to be included in any decision the Board may issue.

Participating in the Hearing

To be a participant in a NEB hearing process, you must be directly affected or have relevant information or expertise. You can apply to participate as an intervenor or by letter of comment.

The application to participate process is now closed.

Participant Funding

Refer to the Participant Funding Program page for information on deadlines, eligibility, how to apply for funding, and how to submit claims.


If you would like to learn more about issues such as how pipelines cross rivers and the NEB’s role in the North please visit the following links:

  • Video – Intro to Hydrostatic Testing

News Releases and Backgrounders

  • January 25, 2018 – NEB approves Line 21 Segment Replacement Project
  • October 19, 2017 – National Energy Board Hearing for Line 21 Replacement Project Begins Next Week
  • August 14, 2017 – Backgrounder: Coordinating the review of the Line 21 Segment Replacement Project with other regulators
  • May 19, 2017 – National Energy Board to hold public hearing to consider Enbridge’s Line 21 Segment Replacement Project

Contact Information

Company contacts

If you have questions about the project, please contact Enbridge Pipelines at 1-888-263-3654 or projects@enbridge.com, or visit their website.

NEB Contacts

Rachel Clark
Process Advisor Team

Canada Energy Regulator
Email: rachel.clark@cer-rec.gc.ca
Telephone: 403-389-4240
Telephone (toll free): 1-800-899-1265
Facsimile: 403-292-5503
Facsimile (toll free): 1-877-288-8803

For media inquiries, please contact:

Media Relations Team
Canada Energy Regulator
Email: media@cer-rec.gc.ca
Telephone (toll free): 1-800-899-1265

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