Tailings Dams Review Boards and Inspection Reports

Tailings dam review boards and inspection reports exist because of a voluntary effort by the mining industry to improve and mitigate dam issues. In addition, mining companies are under pressure to be more transparent on their issues. We discuss the term “issue” below.

The United Nations Environmental Programme 2017 report and, more recently, the Church of England initiative and ICMM’s Global Industry Standard on Tailings Management (GISTM) are all expressions of this growing pressure.

Thus, mining companies are requesting the publication of tailings dam review boards and inspection reports. Publication opens the door to immediate scrutiny and thus to an increase in all actors’ liabilities. The main actors are the mining companies, the review board members and the inspectors. That increase of liability, especially due to frivolous challenges, is the major difference between publishing and not publishing those reports. Indeed, in the case of serious accidents, reports and studies are generally the object of subpoena. As a result, their authors get involved in the proceedings.

Liabilities in Tailings Dams Review Boards and Inspection Reports

Review boards have to give expert advice on dams and their issues. We have seen review boards getting involved in modifying parameters of geotechnical analyses or inundation studies. At Riskope, we believe that involvement is not within the scope of a review board and certainly exposes the members to undue liabilities.

Inspection teams have an “audit style” approach and mostly deliver factual observations. However, we have seen inspection reports qualifying the “safety” of a dam, or even “risks”, as a result of their observations. That is, again, a detrimental behavior from an inspector’s liability point of view.

Inaction from the mining company can obviously result in potential liabilities. In our practice, we note that although some advice and observations may not be what the owners would like to hear, in the great majority of cases, the advice and observations are followed by actions. Only very rarely have we seen correspondence addressing negligent inaction by the owner.

Now it is time to discuss why we are using the term “issue”. We used “issue” because it is broad. Indeed, it is often unclear if tailings dams review boards and inspection reports end up addressing dam risks or hazards and oftentimes, as we noted, they go out of scope, unduly exposing themselves.

Furthermore, we have seen many of those reports which, for example, use hazard and risk interchangeably, poorly define the “system” under consideration (i.e. the dam and its ancillary facilities) and forget the existence of cascading dykes and dams and their interdependencies.

 A Roadmap to a Better Working Environment

 At Riskope, we believe that one way to avoid undesirable exposures lies in adopting a clear technical glossary and adopting a workflow where each step has very clear scope.

The figure below shows where site inspection and audit style review should sit in the workflow. We think the goal of site inspections and audit style reviews is not to make declarations on the issues. It is instead to provide a set of concrete key performance indicators (KPIs) enabling transparent, quantitative risk analysis.

Tailings Dams Review Boards and Inspection Reports

The role of the review board should be to ask for specific enhancements of data and inspection results with the goal of reducing uncertainties on the KPIs. The review board should then oversee the mitigative roadmap preparation, ensuring the overall flow remains unbiased and free of conflict of interest.

How are KPIs Used in the Workflow?

Quantitative risk assessment methodologies (like ORE2_Tailings™) use the KPIs to avoid numerous pitfalls of common practice approaches. These KPIs cover the life of the dam system from inception and converge on the four “families” of causality: investigation, design, construction and operations and maintenance (including monitoring).

At Riskope, we consider causality analysis a fundamental enhancement in the process. Indeed, it avoids a number of biases and arbitrary choices.

Tailings Dams Review Boards and Inspection Reports

As can be seen in the figure above, probability of failure resulting from the composition of the KPIs evolves all along the dam life while maintaining a certain level of uncertainty. Data allow us to evaluate consequences.  Finally, the probability of failure and consequences of the failure are informative in the evaluation of the risk of the structure.

Closing Remarks

In a world where secrecy is no longer possible or desirable, it is time to change old habits in the name of ethics and best professional practices. Protection against legal challenges to review board members and inspectors comes from clearly stating the scope of their work, rigorously abiding to that scope and using a clear glossary.

In a perfect world, we would see a unified approach to risk assessment and road map to mitigation, one that uses quantifiable KPIs and transparently shows the risks of the structures to everyone, including the gains yielded by actions of the owners. The unified approach could then display the results in the dashboard of initiatives like Responsible Mining, for the benefit of everyone.

Contact us to see how a deployment of ORE2_Tailings on your dam portfolio would set you at the forefront of ethical, responsible, profitable and competitive mining.