Client: Roche Mining for Kimberley Nickel Mines
Location: Sally Malay, WA
Start Date: April 2004
End Date: July 2004
Value: $4 million
Sally Malay mine is located in the East Kimberley region of Western Australia, 240km south of Kunnunurra.
This project involved the construction of a Tailings Storage Facility, and a Water Storage Facility in steep and rocky terrain.
The works included:
- Clearing and stripping topsoil;
- Bulk earthworks;
- Chimney filter construction;
- Spillway and associated earthworks; and
- Site rehabilitation.
This involved precision earthworks and high compaction standards. Permeability was critical as the dam was upstream of the Bungle Bungles. The degree and rocky nature of the slopes provided a real challenge for workers especially during installation of the chimney filters.
Several bore holes, encountered during construction of the keyway, allowed underground water to inundate the area under construction. Controlling flow and grouting holes was necessary to proceed with the clay core for the reservoir wall. With limited suitable clay material in the nominated borrow pits the project team had to devote time and effort to sourcing, testing and conditioning sufficient material to complete the core.