Coppabella Wind Farm - Line 99M Rebuild

TransGrid proposes to rebuild Transmission Line 99M from the Coppabella Wind Farm to Yass Substation.

  • Proposed Activity

    Transmission Line 99M forms an approximate 73 km 132 kV single circuit connection between the Yass 330 kV substation and the Murrumburrah 132 kV substation, located in the Southern Tablelands region. To facilitate the grid connection of the Coppabella Wind Farm development, TransGrid is proposing to rebuild an approximate 39 km section of Line 99M between the Coppabella Wind Farm (at Structure 143) and Yass substation as a double circuit line (the project). 

    • The rebuilt section of Line 99M would comprise new 40 metre high steel or concrete pole transmission structures, which would be up to 20 meters higher than the existing wooden pole structures. 
    • The project would also involve the construction of a new switch bay and associated electrical and communications connection works at Yass substation.

    Locaility map

  • Why is TransGrid undertaking the work?
    Goldwind Pty Ltd. has received approval to construct and operate the Coppabella Wind Farm. The Coppabella Wind Farm would connect to the National Electricity Market via TransGrid’s Transmission Line 99M. The current capacity of Line 99M is not sufficient to support the grid connection of the CWF. Consequently, TransGrid is proposing to rebuild Line 99M from Coppabella Wind Farm to Yass substation as a double circuit transmission line.
    TransGrid sought approval in 2018 to uprate Line 99M Coppabella Wind Farm to Yass substation through the replacement of conductors. However, further analysis determined this option would result in an unacceptable marginal loss factor and therefore was discarded.
  • Planning Approval and Environmental Assessment
    Approval for the project is being sought under Part 5 of the Environmental Planning and Assessment Act 1979. TransGrid has completed a Review of Environmental Factors (REF), which can be viewed via the link below. The REF has been made available for public and stakeholder comment from 13 June to 9 August 2019. 
    On Thursday 11 July, the REF was updated on this page to address formatting issues in the technical appendices.
    View the Review of Environmental Factors 
    Make a submission to the REF - email 
    Following the exhibition of the REF, a Submissions Report will be prepared to address any submissions received. TransGrid will consider all submissions as part of the project approval process. TransGrid will be accepting submissions until 9 August 2019. Subject to determination of the proposal, TransGrid anticipates that it will commence construction works in quarter 3 to quarter 4 2019. Construction works are anticipated to take approximately 18 months.
  • How can I get more information?

    To obtain more information please contact our Community Engagement team on 1800 222 537 or to make a written submission email: