For the engineering marvel of a gaint concrete pour, Clyde Dam is hard to top. It's the largest concrete gravity dam in New Zealand: 1 million cubic metres of concrete went into the consturction. It's height is 100m, width at base is 70m, width at crest 10m and length at crest 490m.
Controversy surrounded the building of the dam, which displaced orchards and houses from the Cromwell Gorge to allow the flooding of the river valley. The lake formed by the dam, Lake Dunstan, is a massive 26.4 square kilometres in size.
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