Nga Tamariki is an 82MW geothermal power project. It is located in Waikato, New Zealand. The project is currently active. It has been developed in single phase. Post completion of construction, the project got commissioned in June 2013.

Project Type Total Capacity (MW) Active Capacity (MW) Pipeline Capacity (MW) Project Status Project Location Project Developer
Geothermal 82 82 Active Waikato, New Zealand Mercury NZ; Tauhara North No.2 Trust


The project was developed by Mercury NZ and Tauhara North No.2 Trust. The project is currently owned by Mercury NZ with a stake of 100%.

The geothermal plant is of binary type. The geothermal site has in total 7 number of wells. Out of this 3 are production wells and remaining 4 are injection wells. Nga Tamariki runs at a temperature of 193.

The project generates 700GWh of electricity. The project cost is $355.46m.

Development Status

The project got commissioned in June 2013.

Contractors Involved

Ormat Technologies was selected to render EPC services for the geothermal power project.

Ormat Industries was selected as the steam turbine supplier for the geothermal power project. The geothermal power project consists of 4 turbines.

About Mercury NZ

Mercury NZ Ltd (Mercury), formerly Mighty River Power Ltd, is an integrated power company which generates, retails, and trades electricity. It produces power from hydro and geothermal sources. The company operates various power projects in South and North Islands. Mercury retails energy to homes, businesses and industrial customers across the country under GLOBUG and Bosco brands. It also provides advanced metering infrastructure and data services. In consonance with its shift to renewable sources, the company converted the majority of its vehicle fleet to electric or plug-in hybrid. The company has operational presence in Chile, Germany, Peru, the UK and Ireland. Mercury is headquartered in Auckland, New Zealand.

About Tauhara North No.2 Trust

Tauhara North No 2 Trust invests and develops geothermal steamfields and power stations. The company produces and supplies power in New Zealand. It is headquartered in Taupo, North Island, New Zealand.


All power projects included in this report are drawn from GlobalData’s Power Intelligence Center. The information regarding the project parameters is sourced through secondary information sources such as electric utilities, equipment manufacturers, developers, project proponent’s – news, deals and financial reporting, regulatory body, associations, government planning reports and publications. Wherever needed the information is further validated through primary from various stakeholders across the power value chain and professionals from leading players within the power sector.