Wairere Power Station - Credit: Wikimedia Commons
The Wairere Power Station is a hydroelectric power facility in the Waikato region in New Zealand which makes use of water from the Mokau River. Water is drawn from behind a dam above the Wairere Falls, which diverts the water through two penstocks to the Wairere Power Station, before being discharged back into the Mokau River. The station was commissioned in 1925 with the first generating unit. Three more generating units were added between 1938 and 1981 before a major refurbishment resulted in three of the units being replaced by a single generating unit in 2013-2014. Read more on Wikipedia
Source: en.wikipedia.org