Newfoundland and Labrador Hydro Line Modifications in Gros Morne National Park

Newfoundland and Labrador Hydro (NL Hydro) is proposing to widen the Right of Way (ROW) corridors of five transmission lines that run through Gros Morne National Park. These lines are critical infrastructure, delivering electricity to national park facilities, enclave communities, and destinations north of the national park (i.e., over 9,000 customers). The transmission lines currently have higher service disruption rates than lines outside the park. During this five-year project, NL Hydro will work during the fall and winter to increase the five ROW corridors within the park from 9-15m to 19-29m in width, depending on the terrain. A two-zone approach will be used to reduce the impact of the widened ROW. With this two-zone approach, the existing ROWs (‘wire zones') will continue to be cleared of all trees and shrubs. The new ROW expansion areas (‘border zones') will be selectively cleared of trees tall enough to be in the wire security zone, while shorter trees and shrubs will be retained.

Scope: The Detailed Impact Assessment will assess the impacts of  a transmission line modification project on the Park's ecological integrity, visitor experience and cultural heritage values. The valued components to be assessed include vegetation – communities and species,  visitor experience – viewscapes, and World Heritage Site – Outstanding Universal Values. 

Latest update

July 18, 2024 – The public comment period on the project is closed. Parks Canada is considering comments received to help inform its determination on whether the carrying out of the project is likely to cause significant adverse environmental effects.


Key documents

Key documents
Document Number Document Title File Date
1 New project being assessed by Parks Canada - Public comments invited from June 18 to July 18, 2024 - June 18, 2024


Gros Morne National Park
PO Box 130
Rocky Harbour, Newfoundland and Labrador A0K 4N0
Telephone: 709-458-2417

  • Location

    • Gros Morne National Park of Canada (Newfoundland and Labrador)
  • Nature of Activity

    • Hydroelectric Energy
  • Assessment Status

    In progress
  • Start Date

  • Proponent

    NL Hydro
  • Authorities

    • Parks Canada Agency
  • Assessment Type

    Project on federal lands
  • Reference Number


This map is for illustrative purposes. The markers represent the approximate locations based on available data. More than one marker may be identified for a given assessment.


Nearby assessments

...within 200 kilometres
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