WSP acted as the prime consultant to ensure the rehabilitation was done in a manner that was sensitive to the local environment, land owner and adjacent neighbours.
Tailing sites were reprofiled and resurfaced and a GCL membrane placed at the surface of two of three tailings ponds to reduce water and oxygen infiltration – this minimizes the risk of contaminants spreading to surface water and ground water and potential acid generation. A third tailings area was covered with an engineered cover with capillarity effect barrier to maintain residues saturated.
Our solution preserved and improved the quality of marshland running through the site. To make the best use of existing resources, the dam was stabilized and other infrastructure that was demolished provided crushed concrete that was used as backfill.