tailings
Fallout from the Brumadinho mine tailings disaster in Brazil in January 2019. Source: Israel Defense Forces/Flickr

At the second anniversary of the tailings dam burst in Brumadinho, Brazil that killed 270 people and destroyed the livelihoods and environments for many others, the mining industry seems more willing than ever to take the issue of tailings risks seriously.

But the challenges are great, if one considers the vast numbers of abandoned sites, the profit motive driving corporate decision-making, and the way that regulators have allowed companies to walk away from their responsibilities and externalise costs to society and future generations.

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 Investing in safe & sustainable tailings management

Thanks to recent work by World Mine Tailings Failures (WMTF), we now have a better understanding of the scale and risks that tailings pose worldwide: approximately 223 billion tonnes of tailings are stored in more than 30,000 tailings storage facilities (TSF), including active, inactive and abandoned facilities. Prior to the Brumadinho disaster there was no global public register of TSF.

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The Investor Mining & Tailings Safety Initiative that followed triggered a rush to positive disclosure from more than 250 companies – a good start, and the momentum of the Global Tailings Portal continues.

Despite such disclosure, the RMI Report 2020 reveals that the vast majority of large-scale mining companies are still unable to demonstrate that they review and report on how effectively they manage TSF-related risks, and take responsive actions as necessary.

And critically, very few mine sites show evidence of systematically informing local communities about what to do for their own safety in the case of a tailings-related incident.

The new standard is encouraging, but incomplete

A multi-stakeholder initiative has subsequently published the Global Industry Standard on Tailings Management.

This is most welcome, though RMF would support more ambitious aims for the standard as it evolves.

These include:

  • Raise accountability and responsibility to the CEO or the Board level;
  • Make Free, Prior, and Informed Consent (FPIC) a fundamental right, not a formality to be ineluctably obtained;
  • Include protection of World Heritage Sites and other recognised protected areas;
  • Include protection of riverine, lake, and marine environments;
  • Specify that TSF should be located away from community and worker facilities;
  • Specify that TSF should not be located in areas with moderate or higher seismic risk;
  • Require more public disclosure of the effectiveness of measures taken to limit risk; and
  • Revise the consequence classification matrix to classify as ‘Extreme’ any failure that would result in any loss of life, instead of the current threshold of 100+ human fatalities.

Managing existing TSF risks

Moreover, the Global Industry Standard on Tailings Management applies mostly to new TSF, with less attention being paid to existing ones. Yet it is estimated that up to one-third of the current global portfolio of TSF are impaired and in need of urgent intervention.

The costs of de-risking or removing all TSF that pose a high threat of harm in the event of failure are enormous – in the region of US$670 billion.

Clearly urgent action at scale is needed to address the thousands of highest risk TSF that currently threaten the lives of many peoples around the world.

Legacy sites also need attention

The government of China acted incisively last year, after a tailings dam spill at a molybdenum mine that was the biggest tailings leak the country experienced in twenty years.

The government instituted new measures that require all TSF that have been out of commission for over three years or abandoned to be shut down within a year.

The guidelines also cap the height of new TSF to 200 meters, and prohibit tailings dams to be built too close to residential areas, important facilities or major rivers.

It is estimated that 25% to 30% of all TSF are abandoned, raising the question of responsibility over time. Regulators must ensure that companies do not externalise their post-closure legacy management and costs to taxpayers and future generations.

Mining companies and their industry associations can also demonstrate leadership by playing an active role in addressing legacy issues across the sector.

Ensuring inclusive collaboration

We need more coordinated and inclusive efforts worldwide to ensure leading practices on tailings management are implemented and enforced across the industry.

The proposed establishment of an independent Global Tailings Institute is an opportunity to promote a more ambitious Global Industry Standard on Tailings Management, re-build trust in the industry, and use its independent status to foster inclusive international collaboration.

The article has been supplied by the Responsible Mining Foundation (RMF), an independent research organisation that encourages continuous improvement in in responsible extractives across the industry by developing tools and frameworks, sharing public-interest data and enabling informed and constructive engagement between extractive companies and other stakeholders. As an independent foundation, RMF does not accept funding or other contributions from the minerals and metals industry.