]> 2026-04-21T11:34:15+00:00 Case study:Restoration of Kostonjoki River 500 en Approved Centre for Economic Development, Transport and the Environment for North Ostrobothnia Yes Yes Yes false Restoration of Kostonjoki River Restoration (photo by Eero Moilanen).JPG Restoration of Kostonjoki River Restoration of Ala-Susikoski torrent (photo by Eero Moilanen).jpg Restoration of Kostonjoki River (photo: Eero Moilanen) Restoration of Kostonjoki River_Restoration of Ala-Susikoski torrent (photo: Eero Moilanen) Yes 65.5891009,28.21917 Jukka Centre for Economic Development, Transport and the Environment for North Ostrobothnia Tuohino ,, ,,, 1384 Kostonjoki.JPG Complete Kostonjoki River is one of the tributaries of the River Iijoki. The River Kostonjoki was dredged for timber floating like many other tributaries of the River Iijoki. Before dredging in 1956-1958 there were 105 hectares of rapids and riffles in the Kostonjoki River. After dredging most of the riffles and rapids were destroyed and habitats of the migrating fish lost. Restorations of the Kostonjoki River took place in 2005-2012 as the aim of setting the condition of the water system closer to it´s natural state to enable the fish migration. Object of the restorations was to create pool-riffle variation, add natural water levels to rewater dried parts of the river and add stones and gravel to create habitats for migrating fish. Restorations were successful. Rapid and riffle areas of the Kostonjoki River grew 60% after restorations and densities of migrating fish increased. Restoration of Kostonjoki River restoration of kostonjoki river Yes The Kostonjoki River the kostonjoki river Trouts European grayling crabs mussels Economic aspects Fisheries Habitat and biodiversity Social benefits 2012-09-10T10:01:04Z 2456180.9174074 2013-12-17T14:31:14Z 2456644.1050232 Restoration of Kostonjoki River 500 1 list 3 [[Category:Case study]] [[Parent project::Case study:Restoration of Kostonjoki River]] Restoration of Kostonjoki River# QUERYd70ef4dc940ff80c148c138a3f8e63a0