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Sydney M6 Sinkhole: Billions at Risk
1 Jan
Summary
- M6 motorway construction halted by sinkholes near Rockdale.
- Project faces significant delays and cost escalations.
- NSW government in complex talks over liability and fixes.
Construction of Sydney's M6 motorway, a $3.1 billion undertaking, has been stalled for almost two years following the appearance of large sinkholes. The project's first stage, between Arncliffe and Kogarah, has been indefinitely paused on a 244-metre tunnel section since March 2024 when a significant sinkhole opened above one of the twin tunnels in Rockdale.
This critical delay has led to complex technical and commercial negotiations between Transport for NSW and the involved contractors. The final cost to complete the affected stretch and the overall timeline are dependent on revised engineering designs and the resolution of liability disputes stemming from the prolonged work stoppage.
The NSW government faces the challenge of determining the precise engineering fix required to safely resume construction. These ongoing discussions highlight the intricate nature of the M6 motorway's challenges, with no clear indication of when work will recommence or what the ultimate expenditure will be.
