Trifterlebnispfad - The wave must be held - Information board no. 15
Streams in the upper reaches, such as the Legelbach, actually have far too little water for drifting. Therefore, an elaborate network of water reservoirs is necessary to support the weakening, shallowing wave at the right moment. This function was fulfilled by the side valley wogs of the Legelbach in addition to the local logging. Only with this additional water was a drift on the Legelbach possible at all.
The timing of the waves was the task of a so-called woogman. If something went wrong, it was sometimes necessary to wait a long time for the water to be refilled.