The Upper Mur River is considered as one of the most ecologically valuable rivers of Austria due to the natural reproduction for the Danube salmon. The systematic regulation of the river began at the end of the 19th century, distributaries were cut off and large areas were drained in order to intensify agricultural land use. Restoration measures started in 1997 in the area of the Upper Mur and the “Grenzmur”. Various projects facilitated the renaturation of more than 22 km both in the upper course and the Slovenian border section of the river. A policy issue highlighted by the project is the importance to reconcile key needs for nature conservation with demands for renewable energy generation from small hydro power plants.