Tammerkoski
![The middle part of Tammerkoski, dominated by the power station built in 1930s](/Images/godic/202502/15/Tammerkoski_015042.jpg")
![The north part of Tammerkoski. On the left, the former Finlayson textile mill. On the right, the former metal and textile factory Tampella. The Tampella powerstation is behind the large arched window. The powerstation inlet channel is visible left of the window, rising some five meters above the downstream level.](/Images/godic/202502/15/Finlayson_and_Tampella25042.jpg")
![Tammerkoski in winter](/Images/godic/202502/15/Tammerkoski,_Tampere,_2.prosince_20025042.jpg")
![Tammerkoski is drained on rare occasions to maintain the bridges.](/Images/godic/202502/15/Tammerkoski_view_to_hameensilta_bridge_drained5042.JPG")
Tammerkoski is a channel of rapids in Tampere, Finland. The city of Tampere is located between two lakes, Näsijärvi and Pyhäjärvi. The difference in altitude between these two is 18 metres (59 ft) and the water flows from Näsijärvi to Pyhäjärvi through the Tammerkoski rapids. The banks of the Tammerkoski are among the oldest industrial areas in Finland. There was a busy marketplace in the 17th century and Tampere was originally founded on the banks of the rapids, as the rushing water provided a great deal of power for the needs of industry.