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Marsden A Power Station
Country	New Zealand
Location	Marsden Point, Northland
Coordinates	35°52′32″S 174°28′05″E / 35.875474°S 174.468041°E / -35.875474; 174.468041
Status	Decommissioned
Construction began	1964
Commission date	1967
Decommission date	1996
Owner	Mighty River Power
Thermal power station
Primary fuel	Fuel oil
Power generation
Units operational	2×
Nameplate capacity	250 MW
[edit on Wikidata]

Marsden A was a 250 MW oil-fired power station near the Marsden Point Oil Refinery at Marsden Point, Ruakaka, Northland, New Zealand. It was built between 1964 and 1966 and commissioned in 1967.^[1] It acted as an emergency reserve power station, serving the load centre of Auckland to the south. It was cooled through a long seawater pipe out into Bream Bay, which is now used to supply an aquaculture industry nearby.

Following the commissioning of the dual coal- and gas-fired Huntly power station in 1982, Marsden A became less used, and it was mothballed in the 1990s due to rising oil prices. One of the generators was subsequently run as a synchronous condenser to provide reactive power support to Transpower's national grid in Northland, but were decommissioned in 2007 when they were superseded by solid-state power support devices within Transpower's network.

The facility was previously owned and operated by Mighty River Power.

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