Interior to Lower Mainland Transmission

Transmission lines near Big Bar


British Columbia is growing, so is the demand for energy

The population and economy of B.C. are growing. Over the next 20 years, we project that the demand for electricity will grow by as much as 40 – 45 per cent. And much of that demand will come from the Lower Mainland and Vancouver Island, the most populated areas of the province.

What’s more, the changing patterns of our electricity use and aging equipment have put pressure on the grid.

The Interior to Lower Mainland (ILM) Transmission Project will enable more electricity to be delivered from areas where it is generated – in the Columbia and the Peace regions – to the Lower Mainland and Vancouver Island, ensuring that homes and businesses continue to receive clean and reliable energy.

Latest updates

  • Recently, Discovery Channel aired a feature on the ILM project. BC Hydro crews working in the Spuzzum area have limited access to the work site, and regularly have to transport very heavy parts of the transmission tower by helicopter. This feature focuses on how they use one of the world's largest helicopters, the Erickson Aircrane.
  • Global TV did a recent story on the ILM project which features some great helicopter footage and our crews in action.
  • Stringing of the transmission line (conductors/wires) along the new towers has begun. Conductor ends will need to be joined with the use of an implosive connector that is a metallic sleeve with a small charge in it for each conductor. Using safe and controlled methods, the sleeves are detonated which compresses (weld) the conductor ends together. This split-second process will create several flashes with smoke and very loud bangs.
  • As part of ongoing construction of the ILM Project, helicopters are being used in some areas. All necessary permits and permissions have been obtained, and all work complies with Transport Canada requirements. Wherever possible, helicopters follow routes and schedules that minimize disturbances to residents.