]> 2026-04-10T11:52:28+00:00 Case study:Ruppoldingen 500 en Approved Building nature-like bypass channel Creation of fish passes Creation of fish passes Alpiq Central Plains Yes No Yes false Ruppoldingen plan.JPG Ruppoldingen fishpath 2.JPG Ruppoldingen fishpath 3.JPG Ruppoldingen duck kasvio.JPG The map and plan of Ruppoldingen fishpass. Nature-like bypass channel for fish (photo Pinja Kasvio). Rock cascade fish pass (photo Pinja Kasvio) Duck in the nature-like bypass channel (photo Pinja Kasvio) No 47.311303880636,7.8838062286377 Kasvio Rolf-Jürgen Alpiq Gebler Building nature-like bypass channel, Creation of fish passes,,,Creation of fish passes, ,,, According to monitoring, juveniles of greyling have been found in the bypass channel and big fish species like pike, carp, barbell and wells catfish have used it. These suggests that the bypass channel is providing a new reproductive area. 4345 The rock-cascade fishpass. (photo by Pinja Kasvio) Ruppoldingen fishpath4.JPG Complete Ruppoldingen in the River Aare is a good example of a combination of a long bypass channel with reproduction habitats and a fish pass near to the power plant. The bypass was constructed in 2001 during the renewal of the power plant at the place of the old headrace channel. The planning and construction of the bypass at Ruppoldingen served as the first example to gain experience for similar constuctions in other power plants and especially for the large facilities in Rheinfelden. In Ruppoldingen, the aim was to mitigate the impacts of the hydropower plant, allowing free fish migration and compensate for loss of habitats and also to design a small river that creates habitats for the fish that are typical for the area. The scheme was two-fold. Firstly a 155 meter long natural fish pass close to the turbines. The mean gradient of the fish pass is 3.8%. A second length was also created further downstream of the plant as the bypass that is 1,2 km and mean gradient 0,5%. 2-5 m3/s is lead to the bypass channel as environmental flow. A rock cascade fish pass connects the bypass to the power plant. This channel comprised two arms, one which was shallower with gravel riffles installed and a deeper channel for migration. The aim was to re-create a natural alpine stream. According to monitoring, juveniles of greyling have been found in the bypass channel and big fish species like pike, carp, barbell and wells catfish have used it. These suggests that the bypass channel is providing a new reproductive area. By the measures at Ruppoldingen the power company Alpiq has got the Naturemade Star -certification which is considered to be the most demanding Green Electricity Certification for hydropower. Ruppoldingen ruppoldingen No 1200 Rhine Rhine Rhine rhine River Aar at Ruppoldingen river aar at ruppoldingen 1000 - 10000 km² 1000 - 2000 m Rhine Hydropower 2012-11-15T10:27:43Z 2456246.9359144 2017-06-02T09:00:44Z 2457906.8755093 Ruppoldingen 500 1 plainlist 5 [[Category:Case study]] [[Project title::!Ruppoldingen]] [[Subcatchment title::Rhine]] Ruppoldingen# QUERYc531ca7733f058deaa7d064c58ae32b9