Kemijoki
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File:Kemijoki river map.png
Map of the Kemijoki basin
File:Kemijoki river by Muurola.jpg
The Kemijoki about Template:Convert downstream of Rovaniemi
The Kemijoki or Kemi River (Template:Langx, Template:Langx), with its Template:Convert length, is the longest river in Finland. It runs south through the towns of Kemijärvi and Rovaniemi before reaching the Gulf of Bothnia at Kemi.<ref>Facta 2001, part 8, finnish</ref>
At Rovaniemi the Ounasjoki river merges with the Kemijoki.
The first hydroelectric plant on the Kemijoki was constructed in 1949 at Isohaara. A total of 15 power plants have been constructed so far. The plants are owned by Kemijoki Oy and Pohjolan Voima Oy. In 2003, the plants produced a total of 4.3 TWh, which was about 34.5% of Finland's total hydroelectric production.