Transmission Asset End-of-Life: Asset Replacement Information Process

The IESO will be seeking feedback from stakeholders and communities on a draft process for collecting information on asset end-of-life, or expected service life from transmission asset owners. The draft process also identifies a set of criteria for determining if an asset replacement need may benefit from consideration in a bulk or regional planning processes.

All comments and enquiries about this engagement can be directed to

Related Information

Engagement Plan (draft)

Schedule of Activities



Expected Actions

May 5, 2021

The Regional Planning Review Process Final Report contains recommendations for a transmission asset at end-of-life process. With the posting of this report and the Regional Planning Review Process Final Engagement Summary Report, this engagement is concluded. Please see the Regional Planning Review Process engagement webpage for more information.


Q4 2020            

Please refer to the Regional Planning Review Process engagement webpage for recommendations and next steps related to the Transmission Asset End-of-Life Process engagement.


December 10, 2018


Stakeholder feedback on materials and issues discussed at the November 19th public webinar

  • Cathie Brown
  • Hydro One
  • March 11, 2019: IESO Response to Stakeholder Feedback

November 19, 2018

Public Webinar

Recorded Presentation



November 1, 2018

Regional Planning Review Advisory Group Meeting

  • Overview of initiative and objectives
  • Outline preliminarily process development
  • Seek feedback