Debate on Bendigo-Ophir Gold Mine Raises Environmental Concerns

A proposed gold mine in Central Otago has sparked significant debate, particularly concerning its environmental implications. Shane Jones, a prominent figure in New Zealand politics, invited discussions about the Bendigo-Ophir gold mine, but since that initial challenge, there has been little public dialogue on the matter. This lack of engagement is disappointing, as the project necessitates thoughtful consideration beyond mere economic slogans.

The proposed Bendigo-Ophir mine raises critical questions about the long-term consequences of mining activities. While mining has a storied history in New Zealand, the focus here is on the specific impact of this mine, particularly the tailings facility that would persist long after mining operations cease. The core issue lies in understanding the balance between the economic benefits generated by mining and the enduring environmental obligations that arise from tailings management.

Currently, New Zealand’s mining sector exports approximately $1.2 billion to $1.4 billion annually, yet the royalties returned to the government from these operations are significantly lower, ranging from $20 million to $30 million per year. In terms of gold alone, the statistics paint an even grimmer picture. Last year, the total royalties from all gold mining in the country amounted to only $11.6 million, with the majority of this revenue coming from just two mines: Macraes and Waihi.

To put this in perspective, the cost of constructing the new Dunedin hospital is estimated to be close to $2 billion. At the current royalty rates, it would take over a century of gold royalties to match the expense of this essential public project. This stark contrast emphasizes the limited economic return from gold mining in New Zealand, raising valid questions about the Bendigo-Ophir mine’s financial viability.

Supporters of the Bendigo-Ophir project argue that royalties are not the sole measure of economic return. Mining companies contribute through corporate taxes and employ workers who pay income tax, generating additional revenue via Goods and Services Tax (GST). While these contributions are noteworthy, they are contingent upon the mine’s operational lifespan and the number of jobs it creates. Gold mining, being highly mechanized, typically employs only a limited number of workers, meaning the associated tax revenues would cease once the mine closes.

A significant issue arises with corporate tax contributions. The Macraes mine, New Zealand’s largest, is operated by the foreign-owned company OceanaGold. Public records indicate that in some recent years, OceanaGold reported no corporate income tax payable in New Zealand due to capital investments and deductions offsetting taxable income. While this practice adheres to existing tax regulations, it underscores that high export values do not automatically translate into substantial public revenue.

The impact of the Bendigo-Ophir mine extends beyond immediate economic considerations. After an operational lifespan of approximately 15 to 20 years, the mine would cease all activities, leaving behind a tailings facility that could pose long-term environmental risks. A report by the Parliamentary Commissioner for the Environment, titled “Long-term Management of the Environmental Effects of Tailings Dams,” highlighted the enduring obligations associated with tailings management. This message has gained relevance following significant tailings dam failures globally, such as the Mount Polley disaster in Canada in 2014 and the Brumadinho collapse in Brazil in 2019. These events prompted the United Nations Environment Programme and other organizations to establish the “Global Industry Standard on Tailings Management” in 2020, emphasizing the necessity for safe management of tailings throughout their entire lifecycle, including after mine closure.

Geographically, the proposed site for the Bendigo tailings facility is particularly sensitive. It is located at the headwaters of a river system that nourishes agricultural lands, vineyards, and communities across Central Otago. This area relies heavily on these rivers for its economy, which encompasses agriculture, viticulture, and tourism. Additionally, New Zealand’s seismic activity presents further risk. In 2023, the country’s hazard modelling was updated, indicating an increased understanding of earthquake risks, particularly concerning the Alpine Fault, which traverses the South Island.

While modern engineering techniques can significantly mitigate risks, the reality remains that the natural environment operates on a much longer timescale. Engineering solutions often adhere to defined design lifetimes and probability models, whereas rivers and geological systems extend across centuries.

The company proposing the Bendigo-Ophir mine, Santana Minerals, has invested approximately $8 million in its application, producing a comprehensive 9,400-page report and engaging recognized experts. In contrast, independent groups seeking to scrutinize such proposals often lack similar resources. Until recently, community organizations could access the Environmental Legal Assistance Fund to help cover the costs of scientific and legal expertise. However, this fund was eliminated in the Budget 2024, forcing community groups to independently source funds to evaluate complex mining applications.

This situation raises an essential question regarding governmental support for community scrutiny of major projects: why remove the only mechanism that facilitated public examination of such significant environmental proposals? While the fast-track panel may commission independent advice, the imbalance in resources remains evident. One party may arrive with a team of paid experts, while the other must raise funds simply to understand the evidence.

The complexity of these decisions underscores the need for a thorough and balanced approach. This debate is not merely about whether mining generates economic activity. It is about assessing whether the economic return justifies the long-term obligations tied to managing the tailings facility, alongside the visual and physical impact on New Zealand’s distinctive landscape, which is integral to its international branding as “Pure New Zealand.”

Some economic decisions have a finite lifespan, while others, such as those related to tailings dams, extend for generations. The mine may close, but the tailings will persist. As such, it is crucial to pause, engage in meaningful dialogue, and ensure that all voices—from scientists to community members—are heard in this essential discussion.