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Greenhills, New Zealand

Southland Region geography stubsSuburbs of Invercargill

Greenhills is a suburb of New Zealand's southernmost city, Invercargill. A quaint but sturdy community with a lush grasslands and home of the "THREE SISTERS". landmark of three mountains visible from Invercargill and surrounding lands.

Excerpt from the Wikipedia article Greenhills, New Zealand (License: CC BY-SA 3.0, Authors).

Greenhills, New Zealand
Bluff Highway, Invercargill City

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Geographical coordinates (GPS)

Latitude Longitude
N -46.5365 ° E 168.3045 °
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Bluff Highway

Bluff Highway
Invercargill City
Southland, New Zealand
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Ōreti River
Ōreti River

The Ōreti River (formerly the Oreti River) is one of the main rivers of Southland, New Zealand, and is 170 kilometres (110 mi) long. The river has been identified as an Important Bird Area by BirdLife International because, for much of its length, it supports breeding colonies of black-billed gulls.The New Zealand Ministry for Culture and Heritage gives a translation of "place of the snare" for Ōreti. In November 2019, the name of the river was officially altered to Ōreti River.The Ōreti has its headwaters close to the Mavora Lakes between Lake Te Anau and Lake Wakatipu, and flows south across the Southland Plains to its outflow into Foveaux Strait at the southeastern end of Oreti Beach. En route, it runs through the towns of Lumsden and Winton, before passing through the city of Invercargill, close to the river's estuary. For the final part of the river's length, around the city of Invercargill and the river's estuary just south of the city, it is known as the New River, a name occasionally encountered to refer to the whole river. It shares this estuary with several smaller rivers, most notably the Waihopai River. The New River Estuary, which meets the end of the Ōreti River before it reaches the sea, is in decline. Recent science reports show that regions of the upper estuary are under stress and showing eutrophication. There is excessive macroalgal growth including sediment quality decline and high concentrations of chlorophyll-a in the water column. Chlorophyll-a was used as an indicator of eutrophic conditions in the water column, and is a colour pigment present in many types of algae that can give an indication of how much algae is present in the water column.The Invercargill Rowing Club relocated to the river in 1958.

Tiwai Point Aluminium Smelter
Tiwai Point Aluminium Smelter

The Tiwai Point Aluminium Smelter is an aluminium smelter owned by Rio Tinto Group (79.36%) and the Sumitomo Group (20.64%), via a joint venture called New Zealand Aluminium Smelters (NZAS) Limited. The facility, New Zealand's only aluminium smelter, is at Tiwai Point, near Bluff. It imports alumina and processes it into primary aluminium. The plant's alumina is supplied from refineries in Queensland and the Northern Territory of Australia. Around 90 per cent of the aluminium produced at NZAS is exported, mainly to Japan. The smelter was opened in 1971 following the construction of the Manapouri Power Station by the New Zealand government to supply it with electricity. It uses 13 percent of New Zealand's electricity, and is reported to account for 10 percent of the Southland region's economy. Rio Tinto has threatened to close the smelter several times, for example in 2013 and 2020, but to date closure has been deferred after renegotiation of the price it pays for electricity. As of January 2021, Rio Tinto announced that it had reached an agreement with its power supplier Meridian Energy to pay a lower price in return for keeping the smelter running until December 2024. In July 2022, NZAS signalled that it would once again offer to remain open if it could secure new power agreements on favourable terms. In May 2024, new twenty year electricity contracts were agreed with three suppliers, allowing the smelter to remain open until 2044. There are concerns regarding the environmental legacy of waste stockpiled at the site, near to an eroding beachline.