Kirribilli Aqueduct Renewal

Project Details

The Kirribilli Aqueduct is a 138-metre length of wastewater pipe that runs next to a heritage-listed sandstone seawall in Sydney Harbour. Neighbouring waterfront properties are in Waruda Street, Kirribilli. Built in 1968, the aqueduct had suffered major corrosion from saltwater and harsh weather , so full pipe replacement and repair of the system was critical.


Concrete Repairs
Protective Coatings
Cathodic Protection

Repairs were carried out from the foreshore of Sydney Harbour, and were made more difficult by the highly exposed and tidal conditions. Metrocorp applied methodologies to protect the sensitive environment, preserve the heritage listed seawall and ensure safe work practices were followed.

A diversion of the aqueduct was implemented and maintained for the duration of the works. This isn’t so unusual perhaps, but a wave and shark net being installed for protection of the work crew certainly was. In addition, access restrictions from the street meant equipment and materials were manoeuvred to and from the work zone daily by barge.

138 m Aqueduct length
5 Maintenance holes

Metrocorp Technologies successfully replaced the full length of the aqueduct and repaired the five maintenance holes while working in accordance with North Sydney Council requirements and RMS conditions, completing the project on-budget and ahead of schedule.