The Mustionjoki River is historically one of the richest salmon rivers of South Finland. It is also one of the birthplaces of iron mill industry in Finland dating back to the 17th century. During the old days, there used to be a runway for the migrating fishes along the water-based industry. This was called Kuninkaanväylä-the King's Channel. The naturally migrating fishes in Mustionjoki are salmon, trout, whitefish and eel. Notable cultural historic areas by the river are the iron mills of Mustio, Billnäs and Åminnefors.


The annual runs of the migrating fishes ended in 1956, when the Åminnefors hydropower station and dam was built close to the river mouth. Together with the migrating fishes was lost the culture of the Mustionjoki river valley inhabitants who were living with the river. Today the industrial river has 4 dams operated by Fortum and is producing electricity.

Mustionjoki connects Lake Lohja to the Pohjanpitäjänlahti fjord by the sea and is 25 km long.


The objective of the project is to make a visionary plan for the cultural restoration of the Mustionjoki River Valley. We are going to study the solutions of constructing the fish ways from the sea to the Lake Lohja and design them, partly at inhabited areas.


Our group will produce illustrations and data of the future Mustionjoki River and publish them in the local media as a base for citizen discussions in inhabitant engagement for the river restoration process.