PERTH, AUSTRALIA--December 16, 2013--Researched by Industrial Info Resources Australia (Perth, Australia)--Mighty River Power Limited's (Auckland, New Zealand) Nga Awa Purua power station is currently out of service due to unplanned maintenance and repairs on the unit's steam turbine. Nga Awa Purua is a 138-megawatt (MW) geothermal plant that is being built in a joint venture between Mighty River and Tauhara North No.2 (Taupo, New Zealand) in 65%-35% partnership.