What was developed or tested
Earlier trials and site assessment examined physical substrate behaviour, plant establishment and conditions supporting direct revegetation.
What the evidence supports
An important Australian closure precedent because the tailings themselves form part of the rehabilitated landform. It should not be generalised to reactive residues.
Environmental and technical uncertainty
Avoiding imported cover soil can reduce disturbance, but erosion, rooting depth, salinity, geochemistry and long-term ecosystem trajectory are site-specific.
Benefit-case screening lens
Potential value: Closure and rehabilitation outcomes, reduced erosion or exposure, improved land use and possible avoidance of imported rehabilitation materials.
Deployment constraints: Long-term geochemistry, soil function, vegetation performance, water quality, monitoring duration and whether treatment changes the underlying liability.
Question before applying elsewhere
Will the amended material sustain vegetation while controlling erosion, pore-water quality and contaminant exposure over the required timeframe?