Dhünn

River in Germany

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Dhünn

Location
Country	Germany
State	North Rhine-Westphalia
Physical characteristics

Source
• location	Near Wipperfürth

Mouth
• location	Near Leverkusen into the Wupper
• coordinates	51°02′59″N 6°57′45″E / 51.0496°N 6.9626°E / 51.0496; 6.9626
Length	40.0 km (24.9 mi) ^[1]
Basin size	198 km² (76 sq mi) ^[1]
Basin features
Progression	Wupper→ Rhine→ North Sea

Dhünn is a 40 km (25 mi)-long river located in North Rhine-Westphalia, Germany. Its main source is near Wipperfürth in the Bergisches Land area. It runs in a south-westerly direction, and its mouth into the river Wupper is near Leverkusen, appr. 10 km (6.2 mi) north of Cologne.

Renaturation

By diverting the river bed of the Dhünn around the 'Sensenhammer' weir in April 2010, it was declared the first 'barrier-free river' in North Rhine-Westphalia. This means that the 24 km (15 mi)-long stretch of the river from the mouth into the Wupper to the 'Großen Dhünn' dam is accessible without obstacles for fish and microbes. Fish can now migrate again freely to their spawning grounds.^[2]

Sights along the river

Altenberg Abbey
Berge castle (German: Burg Berge)
Strauweiler castle (German: Schloss Strauweiler)
Morsbroich castle (German: Schloss Morsbroich)^[3]
Freudenthaler Sensenhammer museum (German: Museum Freudenthaler Sensenhammer)^[4]

References

^ ^a ^b Hydrographic Directory of the NRW State Office for Nature, the Environment and Consumer Protection (Gewässerverzeichnis des Landesamtes für Natur, Umwelt und Verbraucherschutz NRW 2010) (xls; 4.67 MB)
^ Press release of the Wupper interest group dated 30 March 2010^{[permanent dead link]}
^ Seite des Museums Schloss Morsbroich
^ Seite des Industriemuseums Freudenthaler Sensenhammer