Ecology & environmental protection
Due to the extremely cramped conditions, part of the fish ladder in the left-hand weir stringer, which survived the construction period of the power plant (1941 to 1949), was used for the route of the fish bypass. A multi-structure slot basin pass consisting of 74 basins with 14 additional resting pools was built. This arrangement has a total length of approx. 300 metres and has to overcome a height difference of 9.6 metres.
The functionality of the fish bypasses on the Drava is continuously monitored. This is supported by a video monitoring system – the so-called FishCam – developed jointly with the University of Natural Resources and Applied Life Sciences. The migratory fish are recorded visually, identified and subsequently recorded in a database and professionally evaluated.