Ausn Heritage Comm v Mount Isa Mines

The Australian Heritage Commission (the Commission) sought judicial review of a decision by the Minister for Resources (the Minister) to grant a mining lease to Mount Isa Mines Limited (MIM). The dispute concerned the potential impact of MIM's proposed mining operations on the heritage values of the Lawn Hill Gorge National Park, which was listed on the Register of the National Estate. The matter came before the High Court of Australia.

The High Court was required to determine whether the Minister's decision to grant the mining lease was valid, notwithstanding the potential adverse effects on the heritage values of the Lawn Hill Gorge. Specifically, the Court considered whether the Minister had adequately taken into account the relevant considerations under the *Environment Protection (Impact of Proposals) Act 1974* (Cth) and the *Australian Heritage Commission Act 1975* (Cth), particularly the protection of places listed on the Register of the National Estate. The Court also examined the scope of the Minister's discretion in granting such leases.

The Court held that the Minister had failed to properly consider the impact of the proposed mining operations on the heritage values of the Lawn Hill Gorge. It was found that the Minister had not given sufficient weight to the recommendations of the Commission and had not adequately discharged his statutory duty to consider the protection of the national estate. The Court emphasised that the statutory framework required a balancing of competing interests, but that the protection of national estate values was a significant consideration that could not be disregarded.

The High Court quashed the Minister's decision to grant the mining lease.