Abwinden-Asten reservoir head
A new side arm and an island are envisaged for the head-of-reservoir area at Abwinden-Asten power plant (near the estuary of the Ottensheim-Wilhering power plant bypass channel). The approx. 500m long side arm of the Danube (2146.4 through to 2145.9 river km) lies entirely on the power plant grounds between the Innbach channel and the Danube. It will allow fish and other aquatic fauna to relocate in habitats that are protected from, among other things, wave hammers and shallow water areas and will thus constitute a significant upgrade in value of the quality of the living space compared to the current condition of the river banks. Bank revetments are not required on the new side arm. Even at low tide, the flow rate will lie significantly above 0.5 m/s, the flow rate will lie at 100 m³/s in mean-flow conditions. The gravel which will be used during production (approx. 300,000 m³) will mostly be used in structuring measures in the head-of-reservoir area as well as for the reshaping of the estuary areas on the left bank's sediment distributor stream and the Große Rodl.