NTPC L-150 Anchor Inspection and Rehabilitation Project, Highway 5

NTPC is currently planning an anchor degradation study for the L-150 transmission line starting September 2022.  The L-150 is a 115 kV transmission line forming the South Slave Grid, comprising of approximately 800 Guyed-Y aluminum transmission towers. Additional geotechnical information is required to complete Engineering of the anchor solution, and ground level assessments of all the anchor structures is required to prioritize structure rehabilitation. NTPC is planning to investigate the anchors and identify the main cause(s) of anchor degradation along the Transmission Line (Corrosion, End of Life, etc.) and the extent of the degradation during the fall of 2022. The scope of work involves subsurface excavation (2-3 m) to determine extent of surface & subsurface corrosion, for one anchor at several tower sites.

Latest update

September 25, 2022 – 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 August 26 to September 25, 2022 - August 26, 2022


Wood Buffalo National Park
149 McDougal Rd
Box 750
Fort Smith, Northwest Territories X0E 0P0
Telephone: 867-872-7960
Email: rescon-ftsmith@pc.gc.ca

  • Location

    • Wood Buffalo National Park of Canada (Northwest Territories)
  • Nature of Activity

    • Maintenance activities (fences, walls)
  • Assessment Status

    In progress
  • Start Date

  • Proponent

    Parks Canada
  • 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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