The Austrian municipality of Oberndorf near Salzburg revised its entire flood protection concept last year. In Oberndorf, known for its "Silent Night, Holy Night" chapel, flooding caused so much damage in June 2013 that an updating of the protective measures was required.
The special challenge with this project is the geographical location of Oberndorf: three streams flow directly into the Salzach river locally: the Frauenbach (maximum flow of 9m³/s), the Oberdorfer Bach (2m³/s) and the Mayerhofer Bach (1m³/s).
The centrepiece of the flood protection scheme is a flood overflow tower and pumping station with two screw conveyors. This screws pump water from the flood overflow tower at a max. capacity of 4.4m³/s.
In addition to the flood overflow tower, two BÜSCH penstocks were installed:
In high-water situations, these two XL penstocks regulate the inflow and outflow of water to avoid flooding like in 2013.
The BÜSCH service team supported locally in the assembly of the two penstocks and the BEA®.