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 retiring all cables of this type from its network.
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 is on exhibition between Friday 7 September 2018 and Friday 28 September 2018. Ausgrid encourages community comments during this time. Community feedback on the REF will be considered as part of this process and prior to the project being assessed for construction approval.
You can submit your feedback via the REF feedback form. Alternatively, you can contact us and we can send you a form.
There are a number of ways you can read the REF:
Printed copies of the REF are available at:
Barry O’Keefe Library ,605 Military Road, Mosman
Stanton Library, 234 Miller Street, North Sydney
Ausgrid , 570 George Street, Sydney CBD – available at the reception on Bathurst Street.
Refer to the section "Environmental Assessment Factors (REF) below.
This project would involve installing the new 132,000 Volt cable between our Willoughby substation in Campbell Street, Artarmon and our Mosman substation in Harbour Street, Mosman.
As with any construction work, there would be some noise and dust, and temporary traffic, access and parking disruptions, but we would make every effort to keep these to a minimum.
View an information graphic showing the different stages of cable laying.
Work to install the new cables would generally include:
digging trenches in roads to lay conduits (plastic pipes) to accommodate the new cables
backfilling trenches and temporary resurfacing of impacted areas (trenching and temporary resurfacing takes about three days outside each property depending on ground and weather conditions)
excavating underground joint bays at various locations along the cable route
feeding in and joining sections of cable at the joint bay locations permanently restoring impacted areas, in consultation with the relevant Council once the overall project is complete.
Work to retire the existing 132,000 Volt cables would involve:
Excavating existing joint bays along the cable route
Ausgrid started engaging with key stakeholders, such as North Sydney Council, Mosman Council, Willoughby Council and Royal North Shore Hospital, earlier this year to obtain feedback on the replacement cable route.
Engagement with residents and businesses along and around the replacement cable route started in March 2018 when the first project newsletter was distributed. A copy of the newsletter can be found at the bottom of this page.
On 27 March and 12 April 2018, Ausgrid held two community information sessions at the Cammeray Golf Club and The College of Law in St Leonards to seek local information and community feedback on the replacement cable route. Interested community members were invited to attend the sessions directly through the newsletter, an advertisement in local newspapers and social media.
At the sessions, members of the project team gave a short presentation on why the project is needed and what to expect during construction.
Thank you to all the community members who attended a session and shared their feedback. All the feedback received from the community will help inform the planning process and will also help us mitigate or avoid impacts during construction.
We will continue to engage with the community and stakeholders during each stage of the project. Ausgrid welcomes questions or comments about the project at any time.