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Sector Participants > IESO News > Generators, Storage Participants and Transmitters to Submit Reliability Assessment Forms by April 1

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Generators, Storage Participants and Transmitters to Submit Reliability Assessment Forms by April 1

March 6, 2025

Generators, storage participants and transmitters are obligated to provide information annually that enables the IESO to perform reliability assessments:

  • Generators and storage participants must submit Form 1230
  • Transmitters must submit Form 1494

As per the market rules, all impacted market participants must send their completed forms to forecasts.assessments@ieso.ca by April 1, 2025. The IESO requires information for the period between July 2025 to December 2035 (submissions for six months and 10 years). The IESO's market calendars webpage contains the submission timelines along with links to the latest versions of the forms.

If you have any questions, please contact customer.relations@ieso.ca.

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