Lake Rotoaira
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| Lake Rotoaira | |
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| Location | South of Lake Taupo on the North Island Volcanic Plateau |
| Lake type | natural lake |
| Primary outflows | Pouto Stream |
| Basin countries | New Zealand |
| Surface area | 13 km² |
Lake Rotoaira (sometimes written Lake Roto-aira) is a small lake to the south of Lake Taupo on the North Island Volcanic Plateau in New Zealand. It covers an area of 13 km².
Lake Rotoaira is one of the few privately owned lakes in New Zealand being administered by the Lake Rotoaira Trust on behalf of its owners. An access permit must be held by those using the lake for fishing and similar activities.
The lake is located to the north of the broad volcanic dome of Mount Tongariro and is naturally drained by the Pouto Stream into the Tongariro River.
However the Tongariro Power Development Scheme utilised Rotoaira as a storage lake for the Tokaanu Hydropower Station. Extensive engineering works were carried out including the diversion of a number of other streams (including Whanganui River) into Rotoaira via the Otamangakau Hydro Lake and construction of a tunnel through Pihanga to the Tokaanu Power Station.
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