Debate on Bendigo-Ophir Gold Mine Sparks Concerns Over Impact

A recent call for public debate on the proposed Bendigo-Ophir gold mine has brought to light significant concerns regarding its long-term environmental impacts. New Zealand politician Shane Jones had challenged for a discussion on the mining proposal, but the anticipated debate has not materialized. This silence is unfortunate, as the mine’s implications warrant careful consideration beyond superficial slogans about economic growth.

The Bendigo-Ophir site, located in Central Otago, is poised to generate significant mining activity, but the critical issue revolves around the tailings facility that will exist long after the gold extraction ceases. The focus should be on understanding the risks and rewards associated with this particular project, rather than general ideologies surrounding the mining industry.

Mining has been an integral part of New Zealand’s development for generations. However, the financial returns from the current mining sector raise questions about sustainability. According to data from the New Zealand government, the entire mining sector generates approximately $1.2 billion to $1.4 billion annually in mineral exports, yet the royalties returned to the country are only about $20 million to $30 million each year.

When examining gold mining specifically, the figures are even more stark. In the previous year, gold mining yielded approximately $11.6 million in royalties, with the majority of that revenue—around 84%—coming from the Macraes and Waihi mines. To put this in perspective, the estimated cost of building the new Dunedin hospital is around $2 billion, indicating that it would take over a century of gold royalties at current levels to fund just that single public project.

The debate with Mr. Jones was intended to focus on the economic implications of the Bendigo-Ophir mine. A key question would have been: “If the total royalty return from all gold mining in New Zealand is just over $11 million a year, what does the return from one additional mine actually look like?” Advocates for the project often highlight that royalties are not the sole economic benefit; mining companies also contribute corporate taxes, and jobs generate additional tax revenue.

Nevertheless, these financial contributions are tied to the operational lifespan of the mine, which typically employs only a few hundred workers due to the mechanized nature of gold mining. Thus, the economic benefits diminish once the mining operations cease.

Another critical point of discussion would involve corporate taxation. For instance, the Macraes mine, operated by the foreign-owned company OceanaGold, has reported years in which it paid no corporate income tax in New Zealand due to deductions offsetting taxable income. While legal, this situation illustrates that high export values do not necessarily translate into substantial public revenue.

The long-term implications of the Bendigo-Ophir project raise further concerns. The tailings facility, which may operate for decades, will remain a potential environmental liability long after gold mining concludes. The Parliamentary Commissioner for the Environment published a report nearly 30 years ago indicating that tailings dams create obligations that extend well beyond the commercial lifespan of a mine. This viewpoint has gained traction following disastrous tailings dam failures internationally, such as the Mount Polley incident in Canada in 2014 and the Brumadinho collapse in Brazil in 2019.

In response to these risks, the United Nations Environment Programme and the International Council on Mining and Metals established the “Global Industry Standard on Tailings Management” in 2020. This framework emphasizes the necessity for safe management of tailings facilities throughout their entire lifecycle, including post-closure.

Location is another pivotal factor. The proposed Bendigo tailings facility is situated at the headwaters of a river system that nurtures local agriculture, viticulture, and tourism. Given New Zealand’s geological activity, with the Alpine Fault poised to rupture again, the risks associated with such a facility become even more pressing.

While modern engineering can mitigate some risks, it operates within defined lifetimes and probability models. Geological systems, however, function over centuries, raising concerns about the long-term safety of the tailings facility in a seismically active region.

The company behind the Bendigo-Ophir proposal, Santana Minerals, has invested considerable resources into developing a comprehensive application. They have submitted a detailed 9,400-page report and consulted internationally recognized experts. Unfortunately, independent groups working to scrutinize such proposals often lack similar resources.

Recent changes in funding, particularly the removal of the Environmental Legal Assistance Fund in the 2024 Budget, have further hindered these organizations. This fund previously helped community organizations cover the costs of scientific and legal expertise necessary to analyze environmental proposals. Without such support, they must now raise funds independently, creating an imbalance in the scrutiny process.

The complexity of these decisions underscores the necessity of a thorough and inclusive debate. It is crucial for all stakeholders—scientists, engineers, local communities, and industry representatives—to be heard. The essential question is not whether mining generates economic activity, as it undoubtedly does, but whether the scale of that activity justifies the long-term obligations imposed by the mine’s tailings facility.

As the debate around the Bendigo-Ophir project continues, it is evident that while the economic rewards from mining may be short-lived, the responsibilities associated with tailings management extend for generations. Ensuring a balanced approach requires pausing to consider all perspectives and making informed decisions that reflect both immediate benefits and long-term impacts.