Base Metals Mine

Northern Australia

OKC were appointed to provide landform and cover designs for a large, existing waste rock dump containing Potentially Acid Forming (PAF) material.

A material characterisation program was first conducted to confirm the properties of the available cover materials and enable the erosion assessment.  The erosion models WEPP and SIBERIA were used to model the landform evolution over long time scales to confirm PAF material would be contained. Numerous profile configurations were checked to design stable outer embankment configurations and necessary surface water drainage.