List of dams in the Ruhr

The list of barrages in the Ruhr shows the weirs and reservoirs on the Ruhr, including the locks for Ruhr shipping and the fishways . The weirs are used, among other things, to regulate water and supply drinking water, and in parts also for shipping, and they also protect bridge structures from being undermined. At the same time, however, they represent a barrier for aquatic life.

Biological patency

Dams represent barriers which, without special measures, impair the ecological permeability for fish and invertebrates . In the lower Ruhr alone, between Duisburg and Westhofen , there are 16 weir systems. Due to the impassability of the weirs at the Kettwiger See and Baldeneysee, salmon only penetrate the Ruhr as far as Mülheim as of 2013 to spawn there. The tributaries of the Ruhr are also dammed by weirs, the Lenne has 60 weirs. According to Section 34, Paragraph 3 of the Water Management Act , the operators of the dams they operate or build must take the necessary measures to create patency.

Tons of salmon were still being caught in the Ruhr at the end of the 19th century. The salmon has not existed for over 100 years. Since 2007, spawning grounds for salmon near Mülheim an der Ruhr have been detected again, although the Duisburg Ruhr weir remains an obstacle. As of 2010 it was said: "Salmon can only make it if they use the rare opportunities of an open lock on the Rhine-Ruhr connection in Duisburg."

list

The weirs currently in place include, from where it flows into the Rhine:

designation	km	Height (m)	lock	Fish way	Transfer possibility for boaters	comment
Ruhrwehr Duisburg 51 ° 26 ′ 39 ″ N , 6 ° 45 ′ 20 ″ E51.444166666667 6.7555555555556	2.5	5.23	Ruhr lock Duisburg	old, factually ineffective pool pass; New building planned (as of 2004)	Carrying around on the left bank of the defensive arm, underwater difficult depending on the Rhine level	Duisburg-Meiderich return pumping station . A hydropower plant is being planned.
Raffelberg weir 51 ° 26 ′ 35 ″ N , 6 ° 50 ′ 12 ″ E51.443055555556 6.8366666666667	7.8	6.85	Ruhr lock Raffelberg	Raugerinne basin pass. The construction period was around 10 months from November 2000 until the system was officially commissioned on August 22, 2001. On behalf of the Waterways and Shipping Administration, a fish ladder was built on the Ruhr Canal in 2006 that met today's biological and ecological knowledge.	Transfer approx. 200 m above the Raffelberg lock with footbridges for inserting and releasing	Raffelberg hydropower plant and return pumping station.
Broicher Schlagd			Ruhr lock Mülheim	Fish lock at the power plant	It is not possible to travel further downstream, bypassing the Mülheim Ruhr lock	Kahlenberg hydropower plant and Kahlenberg return pumping station
Kahlenberger Weir			via Ruhrschleuse Mülheim
Kettwig	21.5	6.20	Kettwig lock		Left at the power station across the street. Slip ramps in the upper and lower water.	Dams the Kettwig lake . Kettwig power station with return pumping station
Baldeney	29.3	8.52	Baldeney Lock	Fish lift under construction	Transfer tunnel in the weir pillar to the right of the lock.	Dams the Baldeneysee . Baldeney power station with return pumping station
Spillenburg weir	42.0	2.51	Spillenburg lock	Fish pass	Boat lane and portability in the lock canal	Return pumping station
Weir Horster Mühle	47.4	3.90	Horst lock	Fish ladder	Boat lane and portability in the lock canal	Horster Mühle hydroelectric power station and return pumping station
Dahlhausen	49.9	0.96	Dahlhausen lock		Boot lane and a short transfer option to the right of the weir	Return pumping station
Hattingen	57.5	1.54	Lock Hattingen	Raugerinne basin pass	Bootsgasse and Treidelgasse on the right bank	Located at the Birschel mill .
Weir Blankenstein	61.8	3.69	Blankenstein lock		Transfer point from the Obergraben over the power plant site into the Ruhr
Weir Kemnader See	64.3	2.60	no lock	Pool pass	Boat lane and portfolios on the left bank	Dams the Kemnader See .
Herbede	69.2	3.25	Herbeder lock , Witten	Fish ladder	Boat lane and portals in the lock arm to the left of the lock	Here the Herbeder Mühlengraben is dammed by the Ruhr.
Herbede Mühlengraben			via Herbeder lock	Plant at the Herbede weir	Plant at the Herbede weir, Mühlengraben not passable	Lohmann hydropower plant
Witten mill ditch			via Hohenstein power plant	over fish ladder at the Hohenstein power plant
Hohenstein weir		4.20	Witten lock	Fish ladder	Difficult to move across rowing club grounds or over the weir at low tide.	Hohenstein hydropower plant
Weather	82.6		Lock weather	Fish pass, built in 2004 on the south side of the power plant. It is a near-natural bypass stream that overcomes a height difference of 5.3 m with the help of 57 individual pools over a length of around 380 m.	Around 230 m long transfer route for water hikers .	Harkort power plant in the Obergraben
Harkortsee			lock	about the system at the Harkort power plant		two more weir systems follow in the Ruhr; The Harkort power station follows in the upper ditch, which adjoins the lake without a weir
Weir Stiftsmühle			lock	Slot pass and rough channel		at the confluence of the Volme into the Ruhr, Stiftsmühle power station . Possibility of transferring from the power plant manager across an island between the power plant and weir.
Weir Hengsteysee			lock	Slot pass	Transfer tunnel to the right of the lock on the right bank.	Dams the Hengsteysee ; Hengstey run-of-river power plant
Westhofen					Umtrage on the right bank over the power plant site in the underground ditch.
Villigst						power plant
Hengsen reservoir
Inflow regulation of the Hengsen reservoir
Langschede				Fish ladder		Langschede run-of-river power plant
Haligen
Fröndenberg
Fröndenberg Obergraben						Möller power plant in Schwitten
Schwitten						Inlet weir for the Fröndenberg power station ditch
Wickede				Fish ladder		Wickede power station
Wickede enema
Real houses						power plant
Real houses inlet						Inflow regulation for power plant
Real houses II
Arnsberg			no lock	Fish ladder available.
Meschede				Fish ladder.		Laer Castle
Olsberg reservoir						Steinhelle II power plant
Wiemeringhausen						Steinhelle I power plant