The Ryburg-Schwörstadt power plant is a Swiss stock corporation based in Rheinfelden in the canton of Aargau. It was founded on October 21, 1926. The power plant was built between 1927 and 1931. It is located on the Upper Rhine, around 21 kilometers upstream from Basel, on the border between Germany and Switzerland, and was one of the first hydroelectric power plants on the Rhine to have all the features of a modern river power plant. The low-pressure drive was built across the river and has four powerful Kaplan turbines with an installed capacity of 120 megawatts. This makes the power plant the most powerful hydroelectric power plant on the Upper Rhine to this day. In order to keep the dam level constant, a 111-meter-long weir with four movable flaps (weir openings) was installed. This measure changed the character of the Rhine on this section of the river considerably, as the gradient of the water was greatly reduced. It was modernized between 1977 and 1984.
From September 2014, during the summer months, pedestrians and cyclists will be able to cross the border between Germany and Switzerland via a newly constructed cycle and pedestrian bridge beneath the power plant.
Source: Wikipedia