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The total length of the Eura is 53 kilometres (33 mi). It has eleven rapids and three small hydroelectric power plants with an installed capacity of 0.1–0.5 MW. Its longest tributary is the 23-kilometre-long Köyliö which originates at Lake Köyliö.[1]
The Eura has been an important waterway since the Viking Age, connecting the fertile hinterland to the Baltic Sea. Bronze and Iron Age settlements in Eura were the most largest and most remarkable in Finland.[2][3]
