# New South Wales coal mining and climate litigation > Live situation record from CLSTR: https://clstr.news/situations/new-south-wales-coal-mining-and-climate-litigation > Updated: 2026-10-12T01:35:03.000Z. Sources: 44. Developments: 5. In New South Wales, the approval and subsequent legal challenges of coal mine expansions have highlighted tensions between economic interests and climate obligations. The New South Wales Independent Planning Commission (IPC) approved the Hunter Valley Operations (HVO) Continuation Project, a joint venture between Yancoal and Glencore. This expansion, the largest in the state’s history, allows for the extraction of 716 million tonnes of coal. While the IPC determined that economic benefits and job preservation outweighed environmental impacts, the approval mandated strict conditions regarding greenhouse gas emissions and carbon offsets. Environmental groups criticized the decision as a “betrayal” of climate policy. Following this, the High Court of Australia issued a landmark ruling that halted the expansion of the Mount Pleasant coal mine. In a 3-2 split decision, the court found that the IPC failed to adequately consider how Scope 3 emissions—pollution from exported coal—contribute to local climate risks such as bushfires, droughts, and flooding. This ruling establishes a national precedent requiring decision-makers to account for the local climate consequences of a project’s emissions, potentially impacting numerous other coal proposals in the NSW planning pipeline. The High Court has since upheld this ruling, invalidating the expansion of the Mount Pleasant mine. The legal challenge, brought by local residents Wendy Wales and Tony Lonergan of the Denman Aberdeen Muswellbrook Scone Healthy Environment Group, confirms that decision-makers must account for the regional impacts of Scope 3 emissions. This decision directly affects 17 coal proposals currently in the NSW planning pipeline. Consequently, the expansion approval for MACH Energy, which sought to nearly double annual output and extend the mine's life by 22 years, must be referred back to the NSW Land and Environment Court or the IPC for a proper assessment of its climate impact. ## Claims - The High Court of Australia upheld a ruling regarding the Mount Pleasant coal mine expansion. (corroborated by 15 sources) - The ruling sets a binding national precedent requiring decision-makers to consider local climate change consequences of project emissions. (corroborated by 13 sources) - MACH Energy sought to extend the life of the Mount Pleasant coal mine by 22 years and nearly double its annual output. (corroborated by 11 sources) - The commission approved the mine expansion without considering the regional impact of Scope 3 emissions. (corroborated by 9 sources) - The Independent Planning Commission failed a mandatory legal obligation under the Environmental Planning and Assessment Act 1979. (corroborated by 5 sources) - The decision directly affects 17 coal proposals currently in the New South Wales planning pipeline. (corroborated by 5 sources) - The approval for the Mount Pleasant coal mine expansion remains invalid. (corroborated by 5 sources) - The High Court decision was a split 3-2 judgment. (corroborated by 4 sources) ## Timeline ### 2026-10-12: Australia faces scrutiny over coal and gas emissions rules Australia faces scrutiny over emissions loopholes in coal and gas expansions and a High Court ruling requiring the consideration of Scope 3 downstream emissions in project approvals. 2 sources. https://clstr.news/cluster/australia-faces-scrutiny-over-coal-and-gas-emissions-rules ### 2026-10-10: High Court of Australia issues landmark climate ruling on coal mine Australia's High Court ruled in its first climate case that planning authorities must consider the full carbon footprint, including overseas emissions, for fossil fuel projects like the Mount Pleasant coal mine 3 sources. https://clstr.news/cluster/high-court-of-australia-issues-landmark-climate-ruling-on-coal-mine ### 2026-10-06: High Court of Australia blocks Mount Pleasant coal mine expansion Australia’s High Court has overturned a coal mine expansion approval, setting a precedent that requires planners to consider the local climate impacts of a project’s exported emissions (Scope 3). 29 sources. https://clstr.news/cluster/high-court-of-australia-halts-mount-pleasant-coal-mine-expansion ### 2026-10-06: Hunter Valley Operations coal mine extension approved The NSW Independent Planning Commission approved the Hunter Valley Operations coal mine extension to 2045, drawing support from government officials and criticism from climate advocates. 2 sources. https://clstr.news/cluster/hunter-valley-operations-coal-mine-extension-approved ### 2026-09-30: Hunter Valley Operations secures largest coal mine expansion in NSW NSW's Independent Planning Commission approved the Hunter Valley Operations coal mine extension, citing economic benefits and job security despite significant projected greenhouse gas emissions. 16 sources. https://clstr.news/cluster/hunter-valley-operations-secures-major-nsw-coal-mine-expansion --- Cite as: New South Wales coal mining and climate litigation. CLSTR, https://clstr.news/situations/new-south-wales-coal-mining-and-climate-litigation