The proposed Bungaroo South Project consists of port facilities at Cape Preston and an iron ore mine at Bungaroo South, linked by a 200 km haul route. The open pits at Bungaroo South will mine channel iron deposits (CID) over a 15-year mine life. The proposed haul route crosses several major waterways including the Robe River.
PSM was engaged to prepare a flood study of the Robe River Crossing of the Bungaroo South haul road.
The project required working with a sparse monitoring network coupled with extreme flood estimation uncertainty. There were also braided channel and multiple low-flow crossing points and a wide floodplain with overall crossing length over 1 km.
Following rigorous assessment and modelling, PSM’s tailored approach included:
Rainfall-runoff modelling and regional methods (from Australian Rainfall and Runoff) improved the client’s confidence in estimating peak flows. An understanding of the hydraulic behaviour of the waterway crossing provided valuable information to the client for ongoing maintenance and repair of the road.
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