Duncan v The State of New South Wales; NuCoal Resources Limited v State of New South Wales; Cascade Coal Pty Limited and Ors v The State of New South Wales

The High Court of Australia considered appeals by Duncan, NuCoal Resources Limited, and Cascade Coal Pty Limited and others against the State of New South Wales. The dispute concerned the validity of a decision by the Minister for Planning and Infrastructure to refuse consent for a proposed open-cut coal mine, known as the Drayton South project, located in the Hunter Valley region of New South Wales. The applicants sought judicial review of this refusal.

The central legal issue before the High Court was whether the Minister's decision to refuse development consent was vitiated by an error of law, specifically by taking into account irrelevant considerations and failing to take into account relevant considerations. The applicants argued that the Minister had improperly considered the potential impact of the mine on the aesthetic value of the surrounding landscape, including its perceived impact on the iconic "Bells Mountain" and the visual amenity of the Hunter Valley, and that this consideration was irrelevant to the assessment under the relevant planning legislation.

Gageler J, in his judgment, found that the Minister's consideration of the visual impact of the proposed mine, including its effect on the landscape and Bells Mountain, was a relevant consideration under the *Environmental Planning and Assessment Act 1979* (NSW). His Honour reasoned that the aesthetic value of the landscape is a component of the environmental impact that a planning authority is required to consider. The legislation mandated consideration of environmental impacts, and visual amenity falls within this broad category. Therefore, the Minister had not erred in law by taking this into account. The appeals were dismissed.