HPP Andelsbuch – Water Intake Bezau – Rubber Dam

3D model of the rubber dam weir

Completed and operational rubber dam

Country: Austria

Project period: 06/2011 - 05/2015

Client: VIW - Vorarlberger Illwerke AG

Investment amount: EUR 108,000 (consulting)


In order to improve the flood water alleviation of the water intake structure of the HPP Bezau an existing bypass channel shall be equipped with a rubber dam. The by-pass channel was constructed after the big flood event in 2005 and features currently a fuse plug. The current situation is not satisfactory in terms of sediment management and frequently the HPP operator has to excavate accumulated sediments upstream the water intake in order to provide the required freeboard to 2 bridges over the river.

The awarded consulting services comprise analysis of the existing structures, detailed design and structural analysis of the concrete weir, conceptual layout and detail design of the rubber dam, analysis and detailed design of the flood water channel, preparation of the tender documents for the civil works and the rubber dam.

Services provided:
  • Conceptual layout and preliminary design
  • Detailed design
  • Structural analysis
  • Tender documents
  • Implementation design

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