Cadia Gold Mine - Tailings Dredging

Tailings Dredging

Principal: Newcrest Mining Limited

Location: Cadia Valley, NSW (Near Orange)

Contract Value: $500,000 +

Completion Date: Ongoing

The Dredging of the process water pond at Cadia Gold Mine in Orange N.S.W. was undertaken by Neumann Contractors for Newcrest Mining Ltd.

The project was undertaken using our 150mm dredge, used as a suction dredge only, and fitted with high pressure water jets to loosen the material. As the pond is fitted with a High Density Polythene liner, it was not suitable to use a cutter or spud mounted dredge.

The project required the removal of approximately 50,000m³ of sand and silts which were pumped about 300 lineal metres and 15 metres static, to a thickener.

The dredging of the material was made more difficult due to layers of harder material approximately 300-500mm thick throughout the material to be dredged.