Rig reaching to the top of a bridge to break it apart

Ok Tedi Mine Demolition

Papua New Guinea
OK Tedi Mining Limited
6 months
Completed 2021


Liberty Industrial was engaged to undertake the safe and controlled demolition of redundant structures at the Ok Tedi Gold and Copper Mine located 11km north-west of Tabubil in the Western Province of Papua New Guinea (PNG). This project was carried out in the following two stages to facilitate the exchange of crews from Australia: Stage 1 - Demolition of the IPC and Screening Plant Stage 2 - Demolition of the Dump Pocket, Transfer Station and Conveyors.


  • The works were conducted around live-infrastructure.
  • Our skilled project team were required to battle extreme weather conditions in a highly challenging remote location. Conditions were heightened with the rampant second wave of COVID-19 in PNG.

Robust Solutions/Exceptional Outcomes

Robust solutions

  • A significant component of the project was the salvage and deconstruction of a scalping screen and bridge by the way of oxy cutting, rigging and lifting with a 400t Crawler Crane and 200t all-terrain mobile crane. A heavy crane lift specialist and a third-party structural engineer were engaged to prevent shock loading to retained infrastructure. To overcome the challenges of terrain height and location, our 200t High Reach Demolition Excavator fitted with a 7t shear attachment was utilised to carry out the demolition of the IPC, elevated Conveyors and Dump Pocket structures. A series of structural- engineer-approved pre-weakening cuts were created for the Transfer Station structure to be demolished by an 85t excavator.
  • Site establishment was a crucial component of this project. Our team undertook months of project planning and engineering to set up plant, equipment and personnel on-site. Considerable logistical issues were taken care of to relocate plant and equipment from Australia to the project site in PNG. Our skilled project team also battled extreme weather conditions and the second wave of COVID-19 in PNG.
  • An estimated 5,000t of ferrous and non-ferrous steel was demolished, downsized and recycled. Light to medium gauge steel was processed in situ by Liberty Industrial and transported to a stockpile for future shipping by the client.


Exceptional outcomes

Liberty Industrial achieved successful project completion in the agreed 6-month timeframe.


Value Add


Closure Consulting

Long-term closure planning, budgets and redevelopment strategies for redundant sites, including Early Contractor Involvement and detailed estimates.


Demolition Simulation and Modelling

With exclusive license to demonstrate using Extreme Loading® for Structures (ELS) software developed by Applied Sciences International (ASI).



Use of best approach demolition and dismantling such as explosive using world class fleet, safety and engineering methodologies in explosives and rigging.


Asset and Resource Recovery

Comprehensive waste and recycling management to contribute to the circular economy to extend the lifecycle of materials.


Managing PFAS in Site Closure Remediation


Bioremediation for Closure


Demolition and recycling phase completed for first major closure project for Rio Tinto at Argyle Diamond Mine, WA.

integrated capability responsible decommissioning

decommissioning closure and asset liability consulting

consulting risk management engineered solutions 3d simulation

and simulation liberty modelling dismantling and asset

dismantling and asset recovery synchronised safety

deconstruction resource recovery and recycling expert delivery

high expert industrial delivery reach consulting

expert delivery high reach explosive induced collapse

collapse specialised contracting decontamination

decontamination cleaning remediation environmental stewards

stewards risk mitigation and management waste disposal

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