Over 30 years of mine waste management at copper-gold mine in Papua New Guinea
The Ok Tedi Mine is in the remote Star Mountains of Western Province, Papua New Guinea, near the Irian Jaya border. The mine is a porphyry style, open pit, copper-gold deposit located at an elevation of 1,300 – 2,000 m above sea level. Gold production started in 1984 and copper production followed in 1987. Since the early days, KCB has been involved in the engineering, design and construction monitoring of tailings and waste rock facilities. We developed strategies for mitigating acid mine drainage, and designed a 50 MW on-site hydropower project to supply the mine site and local communities with electricity.
KCB’s consulting services included:
- Design and construction monitoring of dredge sand disposal at the Bige tailings storage facility, designed to store 20 million/tonnes per year of tailings sand for the remaining mine life.
- Design of access roads to the Bige and Lukwi tailings area, and the Ok Menga powerhouse.
- Design and construction monitoring of the Ok Menga 50 MW hydropower run-of-river project.
- Groundwater modelling of the post-closure open pit, as part of a feasibility study to extend the mine life to 2025.
- Development of pit closure options using modelled simulations.