Hydroelectric Plants and Rapids
In Kymijoki, there is 12 hydroelectric plants and several dams to regulate water level. First power plants were built is 1882. Canal and dam of Kalkkinen is used to regulate the water level at lake Päijänne. Hirvivuolle dam regulates water flow between eastern and western branches. Paaskoski dam near Tammijärvi regulates flow to Klåsarö branch and Strömfors dam regulates water level at Strömfors industrial area.
Upper and middle reaches:
- Kalkkistenkoski rapids and regulating dam (Asikkala)
- Jyrängönkoski rapids (Heinola)
- Vuolenkoski, hydroelectric plant (Iitti)
- Mankala, hydroelectric plant (Iitti)
- Voikkaa, hydroelectric plant (Kouvola)
- Pessankoski rapids (Kouvola)
- Lappakoski rapids (Kouvola)
- Kuusankoski, hydroelectric plant (Kouvola)
- Keltti, hydroelectric plant (Kouvola)
- Myllykoski, hydroelectric plant (Kouvola)
- Anjalankoski (Ankkapurha), hydroelectric plant (Kouvola)
- Piirteenkoski rapids (Kouvola)
- Susikoski rapids (At the boundary of Kouvola and ja Kotka)
- Ahvionkoski rapids area, elevation 1,9 m (At the boundary of Kouvola and Kotka)
- Kultaankosket rapids, elevation 1,5 m (At the boundary of Kouvola and Kotka)
Western branch:
- Hirvivuolle, regulating dam, built in 1933 (Pyhtää)
- Hirvikoski rapids (Pyhtää)
- Paaskoski, regulating dam, built in 1933(At the boundary of Pyhtää and Loviisa)
- Klåsarö (Loosarinkoski), hydroelectric plant (Pyhtää)
- Ediskoski, hydroelectric plant (Pyhtää)
- Strömfors, regulating dam, built in 1965 (Loviisa)
- Ahvenkoski, hydroelectric plant (At the boundary of Pyhtää and Loviisa)
Eastern branch:
- Pernoonkosket rapids area, elevation 5 m (Kotka)
- Laajakoski rapids (cleared away, Kotka)
- Koivukoski, hydroelectric plant and regulating dam (Koivukoski branch, Kotka)
- Siikakoski rapids (Koivukoski branch, Kotka)
- Kokonkoski rapids (Koivukoski branch, Kotka)
- Langinkoski rapids (Langinkoski branch, Kotka)
- Hinttulankoski rapids (Huumanhaara branch, Kotka)
- Korkeakoski, hydroelectric plant (Korkeakoski branch, Kotka)
Read more about this topic: Kymi River
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