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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

January 2024

Since our open houses in May 2023, we've been working to identify route options for the new transmission lines that are within existing BC Hydro rights-of-way or parallel to them, where possible, to mitigate potential project effects.

We expect to be able to route the new line parallel to, and north of, the existing transmission lines most of the way between Glenannan and Telkwa substations. However, there are areas between Telkwa and Skeena substations where we may have to deviate from the existing route, and we're reviewing our options in those areas.

The leading route will be identified following collaboration with First Nations, completion of technical and environmental studies, and discussions with stakeholders and will then undergo more detailed study.

We're planning our second round of open houses for this project for spring 2024 and will discuss routing options at the open houses.

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

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 planning 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 Skeena Substation to accommodate required equipment.
  • Expanding Palling and Walcott capacitor stations (CAP 2 and 3) to allow the line to carry more electricity reliably.

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 new transmission line cannot 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.

Glenannan Substation to Telkwa Substation project map

Select the map [PDF, 3.2 MB] 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.


Telkwa Substation to Skeena Substation project map

Select the map [PDF, 2.7 MB] to view it at a larger size.

Key dates Activity
Fall 2022 to fall 2024
  • Start desktop and field studies
  • Assess route and site options
Fall 2024 to spring 2028
  • Select route and capacitor station locations
  • Complete studies and design work
  • Seek required regulatory approvals
Summer 2028
  • Start construction
  • Target in-service date

In May 2023 we held open houses in Terrace, Smithers, Burns Lake and Fraser Lake to introduce North Coast electrification, including the GTTT project. We had a good turnout at the open houses and received feedback on what we should consider when looking at routing options, which we're considering in the development of the route and options.

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

We'll host a second round of community open houses in spring 2024 to provide an update on the project, including routing options.

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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