Notifications of Facilities Ceasing Operation in the WEM

Market Participants are required to notify AEMO when a Scheduled or Semi-Scheduled Facility is ceasing operation or when a Demand Side Programme no longer plans to apply for Capacity Credits. These notifications ensure AEMO can plan for system reliability by signalling capacity needs to the market.

Notification Requirements

Notifications are to be provided no less than three years between the date of the notice and the expected date of closure. Notifications are to be provided by email to [email protected].

Market Participants must notify AEMO when:

  • A Facility is to cease operation permanently
  • A Demand Side Programme will no longer intend to apply for Capacity Credits in a future Reserve Capacity Cycle or
  • They wish to withdraw a previous notice.

Exception to the Three-Year Notification Requirement

In some cases, a Market Participant may be unable to give a period of three years between the notice and the date of expected closure. The ESM Rules allow for shorter notice periods in the case of insolvency, unexpected catastrophic event/s or unforeseen out of control event/s leading to the Facility becoming non-commercially viable. Clause 4.4A.5 of the ESM rules steps through these reasons in more detail.

Publication of Notifications

AEMO must publish the details of all notifications under 4.4A of the ESM Rules on the WEM website within five business days of receipt.

A summary of notifications is provided below.

Facility Notifications

(Clause 4.4A.1 of the ESM Rules - excluding Demand Side Programme and Non-Scheduled Facilities)

Date of Notification   Market Participant   Facility 
31 October 2025  Tesla Geraldton Pty Ltd TESLA_GERALDTON_G1 
Tesla Northam Pty Ltd  TESLA_NORTHAM_G1 
30 September 2025  Alcoa of Australia Limited  ALCOA_KW_IL 
27 September 2024  Synergy  COLLIE_G1 
11 April 2022  Landfill Gas and Power Pty Ltd  KALAMUNDA_SG 
28 October 2021  Synergy  PPP_KCP_EG1 
PPP_KCP_IL1 
26 March 2020  Synergy  MUJA_G5 
MUJA_G6 

Demand Side Programme Notifications

(Clause 4.4A.1A of the ESM Rules)

Date of Notification  Market Participant  Facility  Reserve Capacity Cycle  Withdrawal Status* 
11 May 2025  Simcoa Operations Pty Ltd SIMCOA_DSP_01  2026 onwards   None
5 May 2025  Wesfarmers Kleenheat Gas Pty Ltd  PREMPWR_DSP_02  2025 onwards   None
21 June 2024  Bluewaters Power 1 Pty Ltd  GRIFFINP_DSP_01  2025 onwards  A withdrawal notice was provided 23 May 2025. Facility will seek Capacity Credits for the 2025 Reserve Capacity Cycle onwards. 

*Withdrawal information is shown only where a previous notification has been withdrawn under clause 4.4A.6 of the ESM Rules.

A more detailed data set (as per clause 4.4A.2 of the ESM Rules) is in the excel document below:

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