Transgrid Project Specification Consultation Report: Managing risk on Line 16 (Marulan - Avon)

Market Network Service Provider
StageProject Specification Consultation Report
ConvenorAEMO NSP
Accepting submissions?Yes
Submissions close13/09/2023

Transgrid has published the Project Specification Consultation Report (PSCR) for Managing risk on Line 16 (Marulan – Avon). Publication of this PSCR represents the first step in the Regulatory Test for Transmission (RIT-T) process.

Spanning a route of 71km, Line 16 is a single-circuit 330 kV, steel tower transmission line that runs between Marulan and Avon substations. Constructed in 1962, the line is comprised of 159 structures and forms a key link between Snowy Hydro and the Illawarra and Sydney metropolitan areas. It also links to the network south of Marulan, connecting approximately 650MW of wind generation to the region. 

Transgrid manages and mitigates bushfire and safety risks to ensure they are below tolerance levels or ‘As Low As Reasonably Practicable’ (‘ALARP’), in accordance with Transgrid’s obligations under the New South Wales Electricity Supply (Safety and Network Management) Regulation 2014 and Transgrid’s Electricity Network Safety Management System (ENSMS). The proposed investment will enable us to manage safety and environmental risks on Line 16. 

In the PSCR Transgrid presented two credible network options that would meet the identified need from a technical, commercial, and project delivery perspective. The optimal commercially and technically feasible option presented in this PSCR – Option 2 (remediating all identified condition issues on the line) – is the preferred option to meet the identified need at this stage of the RIT-T. 

Transgrid welcomes written submissions on materials contained in this PSCR. Submissions are due on 13 September 2023.

In accordance with the requirements of the Rules, a summary of the Project Specification Consultation Report is made available on the AEMO website. A copy of the PSCR can be obtained from Transgrid’s website or by emailing

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