ILM: What's happening

Image of snow-capped peak and transmission tower, Interior to Lower Mainland Transmission Project

A new transmission line and capacitor station

There are three main components [YouTube] to the Interior to Lower Mainland (ILM) transmission line:

  • A new 247 kilometre long transmission line between Nicola Substation, near Merritt, and Meridian Substation in Coquitlam. When the existing 500 kilovolt (kV) transmission line was constructed in the 1970s, additional right-of-way was acquired at that time in anticipation of future demand. The majority of the ILM route will parallel an existing line.
  • A new capacitor station on BC Hydro property at Ruby Creek, near Agassiz.
  • Nicola and Meridian substations were upgraded to accommodate the new transmission line.

What’s a capacitor station?

As electricity moves along a lengthy transmission line, the voltage drops. This limits the amount of electricity that can pass through the line. The equipment in the Ruby Creek Capacitor Station helps maintain the voltage levels in the transmission line, allowing more electricity to pass through the line and maintaining system stability.

Interior to Lower Mainland Transmission Project Map

The ILM line includes a new 247-kilometre long 500 kilovolt (kV) transmission line mostly along an existing right-of-way between the Nicola Substation near Merritt and the Meridian Substation in Coquitlam.

ILM Transmission Line Construction Map

For construction management purposes, the 247-kilometre transmission line route was divided into five sections starting at the Nicola Substation near Merritt.

Select the map below to view larger image.