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    View all stakeholder engagements

    Section 306.7

    Proposed Amendments to ISO Rules Section 306.7, Mothball Outage Reporting

    Recent materials posted

    Purpose

    In the Letter of Notice for Development the AESO proposes to consult with Stakeholders on the Mothball rule in order to assess the need to address various matters, including:

    • the economic requirements to temporarily remove generating asset from the market;
    • mothball assets’ effects on the efficient use of the transmission system;
    • requirements to ensure transparency in reporting and effective notification to the market related to the initiation and cancellation of a mothball outage;
    • the maximum duration of mothball outages;
    • other elements of the existing Mothball rule that may be identified as being in need of amendment; and
    • whether changes are required to other ISO rules in order to support a consistent and coordinated approach to the physical removal of generating capacity from the energy market, particularly in consideration of long lead time assets and generation retirement.
    • Options & Recommendations | Nov. 4, 2021

      Purpose

      Following a review of stakeholder comments and discussion during stakeholder session 2, the AESO required further consideration of the remaining components of the rule development, namely transmission access, mothball duration, and subsequent mothballs/extensions.

      The objective of the Options & Recommendations Paper is to present the AESO’s analysis of these key issues and to outline various alternatives. Throughout the consultation and in this paper, the principles of fairness, open competition, cost causation, effective price signals, and stability apply to the AESO’s consideration of the issues raised regarding the Mothball Rule.

      Request for feedback

      In the Letter of Notice for Feedback the AESO issued a notice to Stakeholders, on June 21, 2021, regarding the next steps of the Section 306.7 consultation. These next steps included:

      • Developing a paper that summarizes the options for addressing the issues relating to transmission access, maximum duration, and subsequent mothball outage that have been identified by the AESO and discussed with Stakeholders; and
      • Posting the Options & Recommendations Paper for Stakeholder review and feedback.

      Pursuant to these next steps, the AESO has developed the Options & Recommendations Paper, which includes details of the options identified, advantages and disadvantages of each of the options, and the AESO’s recommended option. The AESO is now soliciting stakeholder feedback.

      Pursuant to Alberta Utilities Commission Rule 017, Procedures and Process for Development of ISO Rules and Filing of ISO Rules with the Alberta Utilities Commission, (“AUC Rule 017”) written comments received from Stakeholders in response to the Alberta Electric System Operator’s (“AESO”) November 4, 2021 Letter of Notice for development of the Options & Recommendations Paper and proposed amended Section 306.7 have been posted on the AESO website.

      Thank you to all Stakeholders who participated in the ISO rules comment process. All written comments received will be considered in the AESO’s finalization of the Options & Recommendations Paper and proposed amended Section 306.7 and replies to those comments will be posted on the AESO website.

      Options & Recommendations materials

    • Session 2 | April 29, 2021

      The AESO hosted a virtual stakeholder consultation session on April 29, 2021 from 8:30 a.m. to 12:30 p.m.

      Purpose

      The Invitation for Stakeholder Consultation Session #2 states this Stakeholder session will provide Stakeholders with details on the in-scope items for the Mothball review initiative and give Stakeholders the opportunity to provide feedback and seek clarity. Specifically, the AESO is seeking Stakeholder participation in round-table discussions on the issues and alternatives and requesting feedback on topics where the AESO has identified a preferred alternative.

      Stakeholder comments

      Thank you to all Stakeholders who participated in this ISO rules comment process. All written comments received will be considered in the AESO's development of the proposed amendments to Section 306.7 and can be found in the materials section below.

      Session 2 materials

    • Session 1 | Dec. 1, 2020

      The AESO hosted a virtual stakeholder consultation session on Dec. 1, 2020 from 1 p.m. to 4 p.m.

      Purpose

      The Invitation for Stakeholder Consultation Session states this stakeholder session will provide Stakeholders with an overview of the Mothball rule initiative, issues to be resolved and proposed scope as stated in the Oct. 14, 2020 Letter of Notice posted on the AESO website. This session will give Stakeholders an opportunity to ask questions and give feedback on the proposed scope and consultation process.

      Stakeholder comments

      Thank you to all Stakeholders who participated in this ISO rules comment process. All written comments received will be considered in the AESO's development of the proposed amendments to Section 306.7 and can be found in the materials section below.

      Session 1 materials

    • Notice for Development | Oct. 14, 2020

      Purpose

      Letter of Notice for Development of the following:

      1. Proposed Amendments to Section 306.7 of the ISO rules, Mothball Outage Reporting (“Section 306.7”)

      Stakeholder comments

      Thank you to all Stakeholders who participated in this ISO rules comment process. All written comments received will be considered in the AESO's development of the proposed amendments to Section 306.7 and can be found in the materials section below.

      Notice for Development materials

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