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The pristine headwaters of the Orongorongo and Wainuiomata rivers are a vital part of Wellington’s water supply. In the late 19th century a dam to supply Wellington was built on the upper Wainuiomata. By 1918 this was inadequate. To increase the supply, the headwaters of the Orongorongo were tunnelled to the Wainuiomata dam.
Te whakamahi i tēnei tūemi
Reference: 00148:0:40
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