Kárahnjúkar Hydropower Plant

Iceland / Austurland / Hallormsstadur /
 hydroelectric power station, underground facility
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The power plant designed to produce 4,600 GWh annually for Alcoa's Fjardaál aluminum smelter 75 kilometres (47 mi) to the east in Reyðarfjörður. With the installed capacity of 690 MW, the plant is the largest hydroelectric power plant in Iceland. The project, named after nearby Mount Kárahnjúkur, involves damming the Jökulsá á Dal River and the Jökulsá í Fljótsdal River with five dams, creating three reservoirs. Water from the reservoirs is then diverted through 73 kilometres (45 mi) of underground water tunnels and down a 420-metre (1,380 ft) vertical penstock towards a single underground power station.
Wikipedia article: http://en.wikipedia.org/wiki/Kárahnjúkar_Hydropower_Plant
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Coordinates:   65°0'38"N   15°0'47"W
This article was last modified 10 years ago