The bedload trap was first developed in a model test at the Institute for Hydraulic Engineering and Hydrometric Testing in Vienna and then implemented as a detailed project. After the flood disaster in 2005, the detailed project was revised again and adapted to the higher design water quantities. When the Lech has normal water, the majority of the water now flows in the new bypass channel. The new channel ensures reduced bed load transport and the ecological continuity of the water. The more water the Lech carries, the more water remains in the old river bed and from there the water, along with gravel and rubble, can flow over a ramp into a long sedimentation basin. The less gravel there is in the riverbed, the more space there is for the water - i.e. more protection against flooding.
The construction work, which was carried out by the Tyrol Federal Hydraulic Engineering Administration, was completed in just four years. Thanks to perfect construction management, costs were also reduced by almost 20 percent. The total construction costs amount to around 4.8 million euros, with 85 percent of this being borne by the federal government and the remaining 15 percent by the municipalities of Ehenbichl, Höfen, Lechaschau, Pflach and Reutte.