Ok Tedi Mining Limited (Ok Tedi) has successfully completed the construction of a critical underground pump station project that improves mine water management, enhances safety and delivers significant cost savings.
The project, which commenced in August 2024 and was completed in June 2025, was delivered incident-free and under budget, achieving a cost saving of US$1.2 million. The achievement underscores Ok Tedi’s commitment to safety and operational excellence.
With annual rainfall of around 10,000 millimetres experienced at the Mt Fubilan operation, the pump station is designed to manage the large volumes of rainwater discharged into the mine pit through shafts and depressurisation holes. The new system channels this water through 800-millimetre polypipes stretching 3.2 kilometres from the underground tunnel to the surface entrance, where it is safely discharged into the river system.
This engineering solution provides a safer, drier working environment for underground crews, enabling continuous productivity and improved working conditions.
The successful delivery of this complex project was a collaborative effort involving three contractors — Tabubil Engineering (TE), the Major Projects Electrical Team and Milum Services Limited (Milum) — who worked closely with more than 40 Ok Tedi underground mining crew members, including Wokman Teleoks Limited (WTL) embedded contract miners.
The project, led by James Waisime, Manager Mine Support Service and Underground, brought together mining engineers, geotechnical engineers, structural engineers, surveyors, boilermakers, pump fitters, electricians and underground miners from the Mine Operations business unit and Major Projects Engineering Team.
“This was a true team effort,” said Waisime. “The safe and timely completion of this project demonstrates the strength of collaboration across departments and our contractors. I’m proud of the commitment and professionalism shown by everyone involved.”
Managing Director and Chief Executive Officer Kedi Ilimbit congratulated the team for the successful completion of the project.
“As a world-class mine, it is imperative that we adopt global best practices. The underground pump station is among a number of projects undertaken by Ok Tedi to improve operational efficiency within our mine operation to ensure we continue to deliver results for the benefit of our shareholders – the people of Western Province and Papua New Guinea,” said Ilimbit.
