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    Bulk and Regional Tariff Design

    For information on the Tariff Design Advisory Group (TDAG) which was disbanded in January, 2020 please click here.

    Important Change Notice

    The AESO acknowledges the COVID-19 pandemic is impacting all our stakeholders in various ways as organizations manage through these challenging times. In recognition of these newly added pressures and urgent shifts in focus across the electricity industry, the AESO has decided to postpone for 90 days all portions of the Bulk and Regional Tariff Design stakeholder engagement work until July 15, 2020. The AESO plans to re-evaluate at that time to determine next steps and whether a continued delay is prudent.

    For additional details, please see the AESO notice here.


    Since mid-2018 the AESO has engaged with stakeholders through the Transmission Design Advisory Group (TDAG) on potential revisions to the currently approved 12-coincident peak (12 CP) methodology for the recovery of bulk and regional transmission costs. In January 2020, the AESO finalized and posted its Stakeholder Engagement Framework (Framework) on the AESO’s website. In alignment with the Framework and in response to feedback that the AESO has received from the TDAG, the AESO is now transitioning the prior members-only TDAG engagement to broad industry stakeholder engagement. The TDAG members have been notified of this change. In addition, the Transmission Tariff Working Group (TTWG) associated with TDAG has also been disbanded as of January 2020.

    On Jan. 31, 2020, the AESO advised the Alberta Utilities Commission (AUC) in its 2018 ISO tariff compliance filing and 2020 rates update application that the AESO intends to address the 12 CP methodology by way of a tariff application to be filed by Sept. 30, 2020.

    High-level overview of the proposed process:

    • Session 1<br>March 13, 2020

       Session objectives

      • AESO to present rate design options for bulk and regional cost recovery with rate objectives assessment

      • Provide rate design analysis tools

      • Review, respond to clarifying questions and collect initial input on options 
    • Session 2<br>Postponed

      Session objectives

      • Summarize feedback from Session 1

      • Stakeholders to present their own rate design options with rate objectives assessment

      • Discuss options 

    • Session 3<br>Postponed

      Session objectives

      • AESO to present final recommended rate design

      • Rate design analysis tools and bill impact 

    • Session 4<br>Postponed

      Session objectives

      • Presentation of summary of upcoming application

      • Stakeholders to be informed of rate design, impact and analysis 


    Note: Session dates once finalized will be shared with stakeholders. Additionally, stakeholders will have opportunities to provide written feedback through comment matrices issued at certain points in the process.

    Out-of-scope for this engagement

    The following topics are out-of-scope and will not be discussed as part of the bulk and regional tariff design engagement sessions:

    • Participant-Related Costs for DFOs (Substation Fraction) and DFO Cost Flow-Through Technical Session(s)
    • 2020 Rates Update
    • Other 2018 GTA Decision and Corresponding Compliance Filing Items

    If you have any other questions, please contact and subscribe to our stakeholder newsletter for updates.