Premier intervenes over Hunter Valley coal mine expansion after High Court ruling

The NSW government is intervening directly rather than waiting for the courts or the independent planning process to resolve Mount Pleasant’s expansion. Premier Chris Minns said legislation would give MACH Energy approval to produce up to 16.5 million tonnes of coal annually until 2032. This matters because the High Court had found the mine’s previous approval invalid.

MACH Energy told the government it could sack about 400 workers before Christmas unless production increased. The legislation will also require the company to sign a jobs guarantee, creating a legal duty to maintain staffing levels. It will limit exports to countries that have signed the Paris climate agreement.

The bill is due during the next sitting fortnight. Minns called the measure a partial approval designed to match the workforce already employed. Environmental groups say the government is bypassing independent planning rules and giving special treatment to a coal company. The High Court’s broader effect remains for lower courts to determine.

Mount Pleasant is a coal mine in New South Wales’ Hunter Valley. The article identifies MACH Energy as the company operating it and says the company is owned by Indonesian billionaire Anthoni Salim. The mine currently has a production limit of 12.5 million tonnes a year.

The mine matters because its proposed expansion became linked to a major legal test over climate impacts. The NSW Independent Planning Commission had approved a larger production limit, but the High Court later ruled that approval invalid. The court said the commission had not properly considered emissions from exported coal burned overseas.

The government now plans to legislate a temporary expansion for the mine. Production could reach 16.5 million tonnes annually until 2032, subject to conditions on exports and staffing. The dispute has drawn criticism from Greens MP Sue Higginson and Lock the Gate, while Premier Chris Minns says the intervention protects jobs and keeps pace with the existing workforce.

The proposed expansion would add 4 million tonnes to Mount Pleasant’s annual production limit. It would increase the ceiling from 12.5 million tonnes to 16.5 million tonnes a year, with the legislated approval lasting until 2032. That is smaller than the 21-million-tonne limit previously approved by the Independent Planning Commission.

The jobs issue drove the government’s decision. MACH Energy told NSW ministers it was preparing to sack about 400 workers, described as half its workforce, before Christmas if the production limit was not expanded. The company had increased staffing while preparing for the larger production level previously approved by the commission.

In exchange for the higher limit, MACH Energy agreed to sign a jobs guarantee. This would create a legal obligation to maintain staffing levels. Premier Chris Minns described the measure as a partial approval that keeps production aligned with the workforce already on the ground, while the courts continue considering the High Court ruling’s consequences.

The High Court ruled that the NSW Independent Planning Commission’s 2022 approval was invalid. Its central criticism was that the commission had not properly considered scope 3 emissions linked to the mine. These are emissions produced later in the chain, including when exported Australian coal is burned overseas.

The ruling matters because it says mine approvals must account for climate impacts beyond the mine site itself. Mount Pleasant’s coal would be exported, and the article says the High Court required consideration of the emissions created when that coal is burned in other countries. The commission’s failure to reckon with those impacts made its approval legally invalid.

The decision triggered calls from the Coalition and One Nation for Labor to change the law. Minns initially played down the need for legal change, but the government now plans legislation for Mount Pleasant. Natural Resources Minister Courtney Houssos said the bill would include scope 3 limits, including exports only to countries that signed the Paris climate agreement.

Scope 3 emissions are indirect emissions arising from activities connected to a company but occurring outside its own site. For a coal mine, the key example is pollution released when customers burn its coal. The article specifically links Mount Pleasant’s scope 3 emissions to Australian coal exported and burned overseas.

The mechanism is straightforward. Mount Pleasant extracts coal, the coal is exported, and overseas users burn it. The mine does not release all those combustion emissions at the pit, but the emissions result from the coal being produced and sold. That is why the High Court said the planning commission needed to consider them.

The issue now shapes the government’s intervention. Natural Resources Minister Courtney Houssos said the new legislation would limit scope 3 emissions in line with a recent Hunter Valley Operations approval. In practice, Mount Pleasant could export coal only to countries that have signed the Paris climate agreement. Environmental groups still warn that pollution could remain unassessed.

The intervention has three possible consequences. It may prevent immediate job losses at Mount Pleasant, but it may also allow additional coal production and associated climate pollution. At the same time, it raises questions about whether governments can override independent planning decisions after a court finds an approval legally invalid.

MACH Energy warned it could sack about 400 workers before Christmas without a higher production limit. The government responded with a legislated approval and a jobs guarantee. However, Greens MP Sue Higginson said the decision could cause significant unassessed climate pollution. Lock the Gate called it political interference and said the mine already had approval to operate for another six years.

The bill will be introduced during the next sitting fortnight. Its scope 3 conditions may restrict exports to Paris agreement signatories. The High Court’s effect on the wider expansion still needs to be worked out in lower courts. The dispute could therefore continue across jobs, climate policy and planning law.

Coal’s path in this case begins at the mine. Mount Pleasant extracts the coal, which is then exported to another country. There, the coal can be burned to generate electricity. The article focuses on the final stage because burning the exported coal creates emissions beyond the mine’s immediate operations.

That chain explains the High Court’s scope 3 ruling. A mine approval affects more than digging and local operations. It also enables coal sales and later use overseas. The court found that the Independent Planning Commission had failed to properly consider those overseas emissions when approving the expansion.

The government’s proposed response would connect export permission to climate policy. Natural Resources Minister Courtney Houssos said Mount Pleasant could effectively export only to countries that signed the Paris climate agreement. The intervention therefore preserves some expansion while adding a supply-chain condition. Lower courts still must determine the wider consequences of the High Court decision.