In October 2018, Garde was awarded a contract by Taihan Cables Australia involving the installation of 132kv underground transmission infrastructure for Ausgrid in several areas in Sydney:
- Eastern suburbs of Sydney (6 kilometres from Kingsford to Clovelly)
- Northern suburbs of Sydney (8 kilometres from Willoughby to Mosman)
- Southern suburbs of Sydney (4.5 kilometres from South Sydney to Revesby)
Works included a twin circuit conduit installation, double circuit 132kV cable installation, joint bay construction, fibre installation and termination, directional drilling, substation footing construction and steel work installation.
The project’s challenges included constructing the 18.5 km trench and joint bays within the densely populated areas.
These three projects were completed and commissioned without incident and to program:
The route between Willoughby Substation and Mosman Substation included liaising with North Sydney, Mosman and Willoughby Councils, as well as open trenching through the Royal North Shore Hospital Grounds.
This work involved replacing the existing underground electricity cables between Ausgrids Revesby Zone Substation and Transgrids Sydney South Substation located in the Georges River National Park at Picnic Point.
Starting at Clovelly Substation, this cable route involved excavating trenches and underground joint bays along highly populated residential streets and through busy RMS roads including Coogee Bay Road, Avoca Street and Anzac Parade, finishing up at the Kingsford Substation. As well as installing the new cable, permanent restoration works were also completed in consultation with Randwick City Council.