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Black Mountain landslide
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Black Mountain landslide

The Black Mountain Road landslide is the biggest landslide on the Sunshine Coast in 30 years. Geotechnical assessments after the landslip determined much of the damage was below the surface, measuring as wide as a rugby league playing field and as deep as a five-storey building. Coming up with solutions to restore the area was complex and involved extensive geotechnical and engineering investigations.

The reconstruction will stabilise the road between depths between 5m to 25m across the 130m span and improve subsurface drainage. Early works began in late September 2023, with major construction starting in November. Construction is expected to finish in April 2025, weather and construction conditions permitting.


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Phases

Phases overview
Engineering investigation
Funding submission
Design
Procurement
Construction

Construction

October 1, 2023 - September 26, 2025

Hazell Bros was awarded the contract to reconstruct the landslip, with construction starting September 2023. The project is on track to be finished in April 2025, weather and construction conditions permitting.