Reclamation field trials commenced in 1985, two years
before the granting of the Mining Licence. The level of pasture production on
varying soil depths (0 cm, 5 cm, 15 cm and 25 cm) overlying both tailings and
oxidised waste overburden was assessed.

After seven years, the rate of increase of N, C, P and
S, losses of Sand P and pH changes were investigated on the plots where grass
seed was sown into bare tailings. It was determined that on these plots it would
take approximately 24 years to reach the original carbon and nitrogen levels at
the mine site.
Further tailings trials have been initiated to
investigate alternative land use options for the tailings dam. Growth increases
of 73% occurred in native species growing directly in tailings, and growth
increases of 78% occurred in tailings amended with compost over the first six
months. Pasture trials on tailings with and without a compost amendment have
also been initiated. Research has commenced to investigate the restoration
options for acid producing pit slopes.
The
early field trials have been put into practice with the restoration of oxidised
waste on the tailings embankment. This is progressive with approximately 16 ha
restored to productive pasture at present. Yields compare well with those of the
most versatile and productive soils types investigated in baseline studies of
the area before the tailings dam was constructed.