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About the project
Marinus Link is a proposed 345 km undersea and underground transmission line that will strengthen the connection between Victoria and Tasmania. It will improve energy reliability and affordability by giving Victoria access to Tasmanian hydropower.
Marinus Link's cables will run undersea from Heybridge in Tasmania across Bass Strait to Waratah Bay in South Gippsland. They will then run 90 km underground to the Latrobe Valley.
Marinus Link will significantly strengthen Victoria's connection with Tasmania. The first stage of the project will be 750 megawatts (MW) - 50% more than the existing interconnector, Basslink.
The project will allow electricity to flow in both directions between the 2 states, delivering low-cost, reliable and clean energy.
Excess energy generated on the mainland will be stored in Tasmania's hydro storage and made available for use when it is needed.
Tasmanian consumers will also benefit from access to Victoria's growing renewable resources and from improved electricity security.
Project status
Marinus Link reached Final Investment Decision in August 2025. The project received approvals through the Commonwealth Environmental Impact Assessment (EIS) and Victorian Environment Effects Statement (EES) processes.
This has resulted in a combined EIS/EES addressing the requirements of Commonwealth and Victorian legislation.
Construction is expected to begin in 2026 and Stage 1 to be completed by 2030. A separate business case for a further 750 MW Stage 2 will be considered by governments in 2026.
Who is delivering Marinus Link?
The project is being delivered by Marinus Link Pty Ltd which is an entity jointly owned by the Australian, Victorian and Tasmanian governments.
More information
You can find out more about the project, the status of its approvals and how the community can have its say at the Marinus Link website.
Page last updated: 29/10/25
