New Geothermal Power Station for Kawerau

Project Overview:

Mighty River Power’s new Kawerau geothermal power station is fully operational ahead of time, under budget and capable of generating at a higher than expected capacity of 100MW.The $300M Kawerau project was the largest single geothermal development in New Zealand for more than 20 years. The station’s output significantly increases national generation capacity and meets approximately one-third of residential and industrial demand in the Eastern Bay of Plenty region.

Edison Delivery:

Edison was engaged by Mighty River Power to provide technical support during the tendering, design and installation of the 110/11 kV substation and 110 kV transmission line that connects the new geothermal power station to the national grid (Transpower).The substation comprises two 110/11 kV transformers, associated switchgear and protection including synchronisation into the grid. The 110 kV line was constructed in concrete pi-pole configuration, utilised a narrow corridor and had to traverses transport corridors around an operating mill site.

The experience and expertise that Edison were able to bring to the project in the 110/11 kV substation and 110 kV transmission line installation works was of great value and aided in the timely completion of the works.

Alan Ofsoski, Mighty River Power

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Grant Lovie

Area Manager


Mike Stevens

Area Manager


Darryl Yorke

Area Manager


Gerald Dignan

Area Manager


Liam Doar

Design Manager