Project Marinus - Second Interconnector Assessment

We're undertaking a feasibility and business case assessment into further Bass Strait interconnection, in partnership with the Australian Renewable Energy Agency (ARENA).

The purpose of Project Marinus is to assess the viability of further interconnection between Tasmania and the rest of the National Energy Market (NEM).

Find out more about Project Marinus.

Project Specification Consultation Report (PSCR) – Open for submissions

As part of the regulatory investment test for transmission (RIT-T) process, we have released our Project Specification Consultation Report (PSCR) (PDF; 1.48MB) and accompanying PSCR summary (PDF; 354KB) for public consultation. This document is our first step in applying the regulatory framework to test rigorously whether further interconnection is in the long term interests of customers. It explains why we consider a need for further interconnection between Victoria and Tasmania, the potential route options we are examining, and the benefits we believe further interconnection will bring. 

The Report meets the requirements of the current National Electricity Rules by describing the "identified need" that further interconnection would address, the project’s underpinning assumptions, and the high-level cost estimates and construction timetable for a second interconnector. 

Have your say

Stakeholders, interest groups and members of the public are invited to have their say on the content of this Report, with submissions due by 26 October 2018. Submissions can be emailed to