Over the last four decades, I’ve seen tailings management evolve from a largely behind-the-scenes activity to one of the mining industry’s most scrutinized and technically challenging responsibilities. Failures have taught us painful lessons, and advances in engineering, monitoring, and governance have reshaped how we approach tailings storage facilities (TSFs).
But what about the next 20 years? If history has taught me anything, it’s that change will continue—driven by technology, societal expectations, and the realities of mining in more challenging environments. Here’s where I believe tailings management is headed.
1. Less Water, More Filtration
The days of conventional slurry disposal are numbered. Concerns about water scarcity, liquefaction risk, and closure liabilities are pushing operators toward alternatives.
- Filtered tailings will likely become the norm at new projects, particularly in water-stressed or seismically active regions.
- Thickened and paste technologies will fill the middle ground where full filtration isn’t practical.
- Water recovery will no longer be optional: it will be central to design.
2. Integrated Water and Tailings Management
Water balance will increasingly drive tailings design. Climate variability: extreme rainfall, prolonged droughts—will force operators to integrate tailings and water management as a single system. Expect to see:
- Climate-resilient water balance models that account for extreme scenarios.
- Greater use of water treatment and recycling within mine operations.
- Designs that can adapt dynamically to wet and dry cycles.
3. Real-Time Monitoring Becomes Standard
Instrumentation has come a long way, but in the future it will be everywhere, all the time.
- Smart sensors embedded in embankments, delivering continuous data on pore pressures, seepage, and deformation.
- Satellite-based monitoring (InSAR) detecting millimeter-scale ground movements across entire facilities.
- AI-driven analytics identifying patterns and issuing early warnings long before humans would notice.
Within 20 years, remote monitoring will likely be the default expectation, not a nice-to-have.
4. Design for Closure from Day One
We’ve been talking about “designing for closure” for decades, but I believe the next 20 years will finally make it mandatory. Regulators, investors, and communities will insist that facilities demonstrate credible closure pathways before they are even approved.
That means:
- Final landforms planned at the outset.
- Covers, seepage controls, and long-term stability designed into initial raises.
- Financial assurance mechanisms that ensure that closure is feasible and funded.
Closure will no longer be deferred—it will be baked into designs.
5. More Stringent Standards and Accountability
The Global Industry Standard on Tailings Management (GISTM) was a landmark step, but it’s just the beginning. Over the next 20 years:
- Standards will become stricter, more consistent globally, and more enforceable.
- Independent review boards will become mandatory, not optional.
- Public disclosure of tailings information will be the norm, driven by investors and communities.
- Accountability will extend beyond companies to individual engineers and decision-makers.
6. Novel Technologies on the Horizon
Innovation won’t stop at filtration and monitoring. Some possibilities I see emerging include:
- Geopolymer binders or additives to improve tailings strength and reduce leachability.
- Engineered microbial processes to cement or desaturate tailings in situ.
- Hybrid facilities combining backfill, filtration and conventional storage to reduce risks.
- Automation and robotics for safer construction and inspection in hazardous zones.
Not all of these will succeed, but some will reshape the industry.
7. A Cultural Shift Toward Zero Harm
Finally, the biggest change may not be technical, but cultural. The industry is moving toward a mindset where any failure is unacceptable. This will require humility, transparency, and a stronger connection with communities.
I believe tailings management will increasingly be seen not just as an engineering challenge, but as a trust challenge. Companies that earn and maintain that trust will be the ones that thrive.
Looking ahead, I see an industry that is safer, more transparent, and more innovative, but also more demanding of engineers. The next generation will face challenges that are bigger and more complex, but they will also have tools we could only dream of when I started in the 1980s.
If there’s one thing I’ve learned, it’s that tailings facilities are unforgiving of complacency. The next 20 years will demand vigilance, adaptability, and above all, responsibility.
Because in the end, tailings management isn’t just about engineering. It’s about stewardship, of the land, the water, and the people who depend on us to get it right.