Bridge River Transmission Project

What's new

We're currently in the process of upgrading our Bridge River generating facilities located near Seton Portage to restore their capacity. The Bridge River Transmission Project will ensure that the regional transmission system can move electricity from these generating facilities to our customers during peak periods.

We've completed our evaluation process of the three project alternatives. Key aspects of the evaluation included: costs, system reliability, safety, environmental impacts, stakeholder interests, schedule, constructability, and maintenance. We've identified Alternative 1: Upgrades to an existing power line in Lillooet as the leading alternative for further study. Over the next few months we'll complete detailed technical studies to confirm the preferred alternative.

The Bridge River Area Transmission Project will ensure that we continue providing clean, reliable electricity to communities in southern B.C.

Leading alternative

Alternative 1 - Upgrades to an existing power line in the Lillooet area

We would upgrade approximately 135 structures and raise the height of an existing line in several sections between Kelly Lake Substation and Bridge River Terminal Station. Work would also include upgrades to existing access roads and the creation of some new roads to access the structures. Most of the work would be within existing BC Hydro right-of-way (the land under and around our power lines).

Lillooet area map

Other assessed alternatives

Alternative 2 - Upgrades to Rosedale Substation in the Fraser Valley

We would add new equipment and complete upgrades to the existing equipment at Rosedale distribution substation located just east of Chilliwack. All work would take place within the existing fenced area of the substation.



Alternative 3 - Adjustments to existing independent power producers (IPP) generation

We would request IPPs interconnecting at BC Hydro's Upper Harrison Terminal (UHT) at the north end of Harrison Lake to reduce generation during specific periods. There would be no physical changes at any location.


We're in the early planning stages of this project. Construction is anticipated to take place between 2023 - 2025.

Maintenance work on the existing line between Kelly Lake Substation and Bridge River Terminal Station will occur as needed, regardless of the selected alternative, over the coming years.

Rosedale substation will have some equipment replacement over the coming years as part of our substation sustainment program.

We'll keep local governments, residents and businesses located near each alternative informed of this project through regular communications and gather input at key milestones.

If you would like to be added to our email notification list, please email

604 623 4472
Toll free: 1 866 647 3334