The New Zealand environment court has approved plans for a giant underwater power plant on the seabed of the Kaipara Harbour, north of Auckland. The plan is for up to 200 turbines being driven by tidal flow and producing enough power to run every home in Northland.

Kaipara is the biggest harbour in the southern hemisphere. The size and speed of the Kaipara’s tidal flow makes it the perfect site to harness tidal energy.

The 200 turbines planned by Crest Energy for the Kaipara Harbour will be harnessing only about five percent of the tide’s energy but that will still be enough to power about 250,000 home – making it the world’s largest tidal power plant.

The project still needs final government approval and it will be at least three years before it begins to produce electricity.