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Access to Transmission Asset Age Data Now Available

January 12, 2023

The IESO is committed to openness and transparency about information and data that inform long-term power system plans. Working in collaboration with Hydro One, the IESO has made transmission system demographic data available, by request, through the IESO’s website.

This asset age data for categories of major transmission assets across Ontario is important for long-term planning as it informs when assets will approach their end-of-life. This information will be updated every five years, and can be obtained by following the instructions in the request form under “Planning Information” on the Regional Planning web page.

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