The Hidden Valley Mine is situated in the remote Morobe Province of Papua New Guinea (PNG), where there was limited power infrastructure before the new open-pit mine was built.
PNG Power engaged WSP to design and deliver the power transmission infrastructure to provide a secure electricity supply of 20 megawatts.
The project included the design of:
105 kilometres of 132 kV single-circuit transmission line with optical ground wire
132 kV six-bay switchyard at the grid connection
132 kV three-bay switchyard at the mine site
The communications interface for the grid control.
Our scope of work included:
Corridor selection and detailed transmission line design
Development of the project implementation plan and cost estimate
Electrical system studies
Specification documents for the contract
Factory witness testing
Conceptual design for the connection assets
Technical specification development for the proposed 132 kV connection substations at Erap and Hidden Valley
The project enabled PNG Power to fulfil its power supply obligations to the mining joint venture. In 2009, the mine’s first gold was poured and in 2010, the mine was officially opened. It is now a gold and silver mine, which is expected to operate until 2024 with the possibility of extension. PNG Power provides power to the mine from two hydro schemes.