Tuesday 11 August 2026Vol. VI
Tailings dam and processing infrastructure at a legacy mine site
Environment

Tailings reprocessing is profitable at this price, and that is both an opportunity and a hazard

Old dumps contain recoverable gold and legacy contamination in the same tonne. Who ends up owning the residue is the question nobody answers up front.

By Callum Reidy & Fenella Osei

Grades that were uneconomic when the dump was built are economic now, and the material is already crushed. On paper it is the cheapest ounce in the industry.

The part that is not on paper

Reprocessing mobilises whatever else is in the pile. Where the original operator has gone, the reprocessor inherits a liability priced as if it were feedstock.

What should be required

A closure plan and a bonded residue destination agreed before the first tonne is moved, not negotiated after the recoverable metal is gone.

Callum Reidy
Energy & Commodities Reporter

Callum reports on energy inputs, power contracts and the decarbonisation cost base of hard-rock mining.

Fenella Osei
Commodities Correspondent, Mine Supply

Fenella is a commodities correspondent covering mine supply, cost curves and producer disclosure across Africa, Australia and the Americas.