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Inside Australia’s deepest motorway tunnels dogged by sinkholes

Contractors are stabilising a 250-metre soft-ground section after sinkholes halted tunnelling, and demolition of a damaged warehouse will start within two weeks, officials said.

Two years after sinkholes halted work, a first look inside the tunnels under Sydney’s south reveals a multibillion-dollar project of stark contrasts.

4 Articles

Sydney Morning HeraldSydney Morning Herald
+3 Reposted by 3 other sources
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Inside Australia’s deepest motorway tunnels dogged by sinkholes

Two years after sinkholes halted work, a first look inside the tunnels under Sydney’s south reveals a multibillion-dollar project of stark contrasts.

·North Sydney, Australia
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Sydney Morning Herald broke the news in North Sydney, Australia on Wednesday, September 9, 2026.
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