• Installation of client-supplied electrical and mechanical equipment
• hV 33kV and 11kV feeder rerouting in the rail corridor
• Extensive rail works, including installation of OHW, GST, GLT, CSR and ULX
• Construction of cable tunnel, pits, shafts and structures
• Installation of electrical and signal cabling
• Night shift works for delivery and installation of precast panels, minimising traffic disruption
• Demolition of old substation building and decommissioning of redundant assets
• Protection or relocation of existing service lines during excavation, requiring interface management and close communicate with utilities providers
• Installation of new CSRs and stormwater drainage works
• Community liaison management, including public information meetings and notifications by letter drop box
• Project completed in complete accordance with Transport for NSW Standard Requirements, relevant ASA and Building Code of Australia (BCA)

Close proximity of Chalmers Street Substation to heritage listed items, as well as the existing live operating rail system necessitated thorough planning. This planning was both to avoid damage to heritage structure through extreme accuracy during excavation and construction processes, and to allow for full integration with existing electrical, telecommunications and civil infrastructures and installations.

Safe and efficient construction occurred in tightly confined physical spaces, limiting space for lay down areas, with technical complexity introduced by virtue of working within or nearby live rail corridors.

Overall, systematic, yet adaptable scheduling required to complete major work elements during strict weekend rail possessions.

Sydney’s future rail network and new fleet of trains need a more robust and reliable power supply. Granville and Chalmers Street substations provide the benefits of providing additional power to operate trains, improves reliability by reducing risk of disruptions and supports the new fleet of air-conditioned trains.