Willoughby to North Chatswood

About the underground cabling work

To deliver fast, safe and reliable train services, the project requires two independent electrical supplies – one at each end of the project. In addition to a supply to the Sydney Metro Trains Facility at Rouse Hill,Transport for NSW will build a dedicated 33 kilovolt (kV) underground connection from Ausgrid’s Willoughby Subtransmission Substation to Transport for NSW’s North Chatswood traction substation.

Work will take place on a route between Artarmon and Chatswood and began in mid–2016. The project is expected to take about two years.

Main site features

The key features comprise:

  • installation of underground conduits and cables from Ausgrid’s Willoughby Subtransmission Substation to the TfNSW Chatswood North Traction Substation (William Street, Chatswood). The cabling will be installed generally using a standard trenching methodology for most of the alignment, with under boring expected to be used for the crossing of the Gore Hill Freeway at Artarmon

  • installation of a cable tray over the North Shore Line (a structure to carry electrical cables over the railway tracks) to provide a connection between Waratah Street and the Chatswood North Traction Substation.

Installation of cables in up to eight conduits including:

  • six 200-millimetre diameter conduits 

  • two 63-millimetre diameter conduits.

Associated infrastructure that would be installed as part of the main conduit and cable works including:

  • up to 16 jointing bays 

  • about 15 feeder pulling pits, generally located at bends along the alignment (about every 300– 400 metres) 

  • about 20 communications pits along the alignment 

  • about five ancillary and/or access pits 

  • connection of the feeder line to the Willoughby Subtransmission Substation and the Chatswood North 
Traction Substation
  • operation and maintenance of the underground conduits and cables.

Planning and approval

TfNSW undertook a Review of Environmental Factors (REF), environmental planning approval for the project. The REF (PDF 17.2MB) assessed the construction, operation and maintenance of the power line. It can be viewed here:

The REF was exhibited for a period of 4 weeks in October 2015. During this time Transport for NSW received 43 submissions from the community.

Submissions were received from residents, business, community groups and Willoughby City Council. Community interest groups and associations also provided submissions including the Artarmon Progress Association, Artarmon Village Inc. and the Artarmon Public School P&C.

A Submissions Report (PDF 2.4MB) details the feedback received and responds to the issues raised. It is available to be viewed in full at sydneymetro.info/northwest and so is the community newsletter (PDF 403KB), which was distributed in March 2016 is here

Most community submissions were concerned about the proposal’s traffic, transport, access, design development and socio-economic impacts.

Transport for NSW acknowledges that the work will impact on the local community and will work hard to mitigate this via careful planning and rigorous on the ground project and traffic management.

Construction timeline

Works commenced in mid 2016. The project is expected to take about two years. Once installation of the feeder line is complete, the line will be owned by TfNSW.

Construction updates

Community Notification - Willouby to North Chatswood 33KV underground cabling work including out-of-hours
PDF | 514.24 KB
Community Notification - 33kV Underground Cabling Work - Brand Street to Mowbray Road
PDF | 483.02 KB
Community notification - Hampden Road, Artarmon works
PDF | 484.8 KB
Community Notification - design investigations Gore Hill Freeway including out of hour
PDF | 510.5 KB
Community Notification - Design Investigations Willoughby to Chatswood
PDF | 317.37 KB

Epping Services Facility

Epping to Chatswood