Artarmon to Mosman cable project


Ausgrid is planning a new cable route between our Willoughby substation on Campbell Street, Artarmon and our Mosman substation on Harbour Street, Mosman. 

Project need

Ausgrid’s Mosman zone substation is currently supplied by one 132, 000 Volt cable from the Willoughby substation, and a further two 132, 000 Volt cables from the Castle Cove zone substation in Chatswood.

These cables are more than 45 years old and are now approaching the end of their service life. They have been subject to failures in recent years and need to be replaced to maintain a safe and reliable power supply to customers.

In addition, Ausgrid is in the process of removing all cables of this type from its network. This forms part of an agreement with the Environmental Protection Agency to prioritise the replacement of self-contained fluid filled cables on the Ausgrid network.

Project status

Ausgrid started planning the project in 2017. This process involved consulting Willoughby City Council, North Sydney Council, Mosman Council, Roads and Maritime Services and other key stakeholders in the areas about possible cable routes.

Ausgrid is currently seeking community input for this project so we can use local feedback as part of the planning process for the new cable route.

For a detailed project and community engagement timeline, and the opportunity to have your say, visit our Engagement Hub

After considering and addressing feedback from the community and further planning, Ausgrid will conduct ground investigations and pinpoint existing underground services along the preferred cable route in mid 2018.

Project approval process

Ausgrid is responsible for assessing and approving works under the Artarmon to Mosman cable project. This process includes preparation of an environmental assessment (Review of Environmental Factors or REF). The REF includes a range of specialist studies and input from the community, councils and other authorities.

The REF will be placed on exhibition at several locations and the community invited to make submissions. People along the proposed route will receive a newsletter with further details on this process. Following the REF exhibition, Ausgrid will review all submissions and prepare a report. 

Ausgrid will then determine the project for approval based on information contained in the REF, the specialist reports and other relevant documents.