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Sweeney Blames Over-Design for $5.5B Surge, Takes Inland Rail Lead

5/7/2026

31 6 Full Breakdown

Summary

Story summary

Sean Sweeney said the new underground stations were over-designed, driving costs up.
He reported the project cost $5.5 billion, far above the original $3.4 billion estimate.
Sweeney attributed the rise to inflation, scope changes, pandemic impacts, and a 2018 platform-length extension that roughly doubled station costs.
He will now lead Australia’s A$30 billion Inland Rail project.

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Story summary

Sean Sweeney said the new underground stations were over-designed, driving costs up.
He reported the project cost $5.5 billion, far above the original $3.4 billion estimate.
Sweeney attributed the rise to inflation, scope changes, pandemic impacts, and a 2018 platform-length extension that roughly doubled station costs.
He will now lead Australia’s A$30 billion Inland Rail project.