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Glenannan to Terrace Transmission Project

Transmission towers and lines running through a forest past a lake.

We're planning to add new 500 kilovolt (kV) transmission lines from Glenannan Substation near Fraser Lake to Skeena Substation in Terrace to meet increasing demands for clean electricity in northwest B.C. Learn more about our Glenannan to Terrace Transmission (GTTT) project below.

What's new

May 2024

We're working to identify the leading route for the proposed Glenannan to Terrace Transmission (GTTT) project. We've completed our second round of community open houses and are considering feedback received as we advance our route selection process. We anticipate identifying a leading route for GTTT in 2024.

Demand is growing from customers in the North Coast area for clean, reliable power to support electrifying their operations to reduce greenhouse gas emissions.

The current 500 kV transmission infrastructure from Williston Substation near Prince George to Skeena Substation near Terrace is reaching its capacity limit and electricity from the Prince George to Terrace Capacitors project, which is currently under construction, is already fully subscribed. We need to expand our transmission system to meet projected demand.

We're proposing to add new transmission lines and associated infrastructure from Glenannan Substation to Skeena Substation:

  • An approximately 130 km line from Glenannan to Telkwa Substation, and
  • An approximately 145 km line from Telkwa Substation to Skeena Substation.
  • Expanding or upgrading Glenannan, Telkwa and Skeena substations.
  • Expanding Palling and Walcott capacitor stations (CAP 2 and 3).
  • Fibre optic cable on new or existing transmission lines.

North Coast Electrification project map

North Coast Electrification project map

Select the map [PDF, 1.7 MB] to view it at a larger size.

This project is part of the North Coast electrification initiative which also includes the Prince George to Glenannan Transmission (PGGT), Prince George to Terrace Capacitors and Northwest Substation Outage Mitigation projects, thermal upgrades to the existing 500 kV lines from Williston Substation to Skeena Substation, potential new transmission infrastructure north, south and west of Terrace and customer interconnection projects.

We've identified a route corridor shown in the figures below and are working to identify route options where the proposed new transmission line can't parallel existing lines between Telkwa Substation and Skeena Substation.

Glenannan Substation to Telkwa Substation

The proposed transmission line routes in this area will generally parallel the existing transmission lines on the north side of the lines.

CS-3768-GTTT Route Options_5L065_Maps_36x24-feb27

Select the map [PDF, 72.1 KB] to view it at a larger size.

Telkwa Substation to Skeena Substation

The proposed transmission line routes in this section have not been determined. They may be north or south of the existing line and may deviate from the existing lines in certain areas as shown in the figures below.

GTTT corridor and route options map - Telkwa to Skeena

Select the map [PDF, 132.6 KB] to view it at a larger size.

Telkwa to Skeena route options - Node 1 to 2b map

Select the map [PDF, 142.9 KB] to view it at a larger size.

Telkwa to Skeena route options - Node 3 to 4 map

Select the map [PDF, 154 KB] to view it at a larger size.

Telkwa to Skeena route options - Node 4 map

Select the map [PDF, 1.9 MB] to view it at a larger size.

Key dates Activity
2022 to 2024
  • Start desktop and field studies
  • Assess route and site options
  • Select leading route location
2024 to 2026
  • Complete studies and design work
  • Acquire property rights
  • Seek required regulatory approvals
  • Start construction
Fall 2030
  • Target in-service date

In May 2023 and March 2024, we hosted in-person open houses in Fraser Lake, Burns Lake (2023), Houston (2024), Smithers and Terrace to introduce the proposed route corridor and route options. We also hosted two virtual open houses in each of 2023 and 2024.

We had a good turnout at the open houses and received feedback on the route and options which we're now considering in our assessments. See reports and documents below to view the information presented at the open houses.

Early engagement with our Indigenous partners is also underway, and this aligns with our commitment to co-design the environmental review and explore Indigenous co-ownership of the proposed new transmission lines, as well other means of Indigenous participation.

Feel free to contact us at any time to discuss or provide feedback about the GTTT project, including the routes under consideration.

We look forward to discussing our plans with you.

Contact us

If you'd like to learn more about the project or provide feedback on the project, please contact us at:

Toll free: 1 866 647 3334

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