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Wingstar Investments has missed a $9.1 million bond payment for the Avalon nickel mine, raising concerns over a potential $300 million cleanup liability for Western Australia's Mining Rehabilitation Fund. The Department of Mines has warned that non-compliance may lead to forfeiture of the tenements.

Wingstar also owns the Cawse mine, which has a higher rehabilitation burden. The MRF's financial capacity is currently $356 million, and past rehabilitation projects have seen significant cost overruns.