Piehing Catchment Area Survey Tender

• Country: Finland
• Summary: Piehing Catchment Area Survey
• FIT Ref No: 139919248
• Deadline: 06 May 2026
• Financier: Self Financed
• Purchaser Ownership: Government
• Tender Value: Refer Document
• Notice Type: Tender
• Document Ref. No.: 608005
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• Description:
• The catchment area of ​​Piehinginjoki is approximately 175.67 km² in size. This 50 kilometer long river is located in North Ostrobothnia and flows into the Perämere in Piehing. The catchment area is divided into several smaller areas, such as the lower part, the middle part, Poikajoki, the upper part and To the areas of Ispinäoja. The river's catchment area mainly consists of forest land and swamp and field areas. The upper and middle part of the river is mainly a forest area, downstream the river is located in a cultural landscape and there are more arable land. Piehingjoki is burdened by e.g. runoff from the peat production area and extensive swamp and forest drainage areas. Ispinänjoki flows into Piehingjoki, which originates near the Laivavaari mining area. The operation of the mine can have effects To the water quality of Ispinänjoki and later also to the water quality of Piehinginjoki. Field crops and human settlements in the lower part of the Piehinginjoki can increase the nutrient load in the lower parts of the river. Trees are known to have been floated in the Piehinginjoki at the beginning of the 20th century. There is a bed may have been modified to meet the needs of wood harvesting, but massive (mechanical) riverbed modifications have not been implemented. In the 20th century, the lower part of Pienginjoki has had small-scale hydropower operations, e.g. for running a mill and saw. Also the surrounding area households have received electricity from small hydropower plants. However, the old small hydropower plants have mostly already been dismantled from the riverside. However, there is still a dam on Kettulankoski, which was once built for the mill's needs. Peeing...
• Documents:

 Tender Notice