A variant and feasibility study was carried out in order to construct a 700 m long island sidearm system and a 900 m long bank reclamation in the section of the Danube between the Abwinden-Asten power plant and the mouth of the Enn.  
The excavated material will be used for the optimisation of the Enns estuary (redesign according to the model test of the Vienna University of Technology).

By exploiting synergies, this project will achieve both an ecological improvement in the sense of the EU Water Framework Directive and a reduction in maintenance dredging and an improvement in fairway conditions in the Enn harbour. The project was launched in 2018 with the awarding and implementation of the submission planning.

News and Activities

  • IIn 2019, the submission planning was started. Coordination with VHP (Verbund Hydropower GmbH), Ennshafen OÖ GmbH and the Municipality of Enns took place.
    Measure area 1 (tributary Lang Au - Mitterwasser) was taken over by VHP in the LIFE WILDislands project application.
    For measure area 2 (riverbank restoration Enghagen, approx. 900 running metres), the basic redemption process was started in 2020. After several rounds of talks, the owners agreed in principle to the necessary land contribution by means of land swaps.
    A valuation report prepared at the end of 2020 is the basis for the subsequent processing of the operational land redemption and the continuation of the detailed planning and coordination with the authorities. Measure area 3 (Schlossau bank reconstruction, approx. 500 m) and measure area 4 (Ennshafen spur) are located on land owned by the Republic of Austria, so that there are no increased planning requirements here.
    According to the available variant and feasibility study, renaturation measures are planned for the Danube section from Abwinden to the mouth of the river Enn as an essential contribution to the implementation of the EU Water Framework Directive. Immediately downstream of the power plant, VHP is planning an island tributary system as part of LIFE WILDislands, and viadonau is developing another one near Enghagen. The excavated material will be used for a redesign of the Enn estuary in order to reduce maintenance dredging in the Enn harbour. Land negotiations, submission planning and coordination with the authorities continued in 2022 and 2023.

Duration & Budget

Project period: 01.05.2018 - 31.12.2024
Total contract volume/contract volume viadonau: Total costs: EUR 232,453 

The project makes a substantial contribution to the implementation of measure
17. Execute restoration measures implementing the EU Water Framework Directive of the Action Programme for the Danube 2022.