Creation of a side arm at the river bed ramp Heimertingen (Unteropfingen)

The originally natural gradient is largely removed by the transverse structures erected as a result of the straightening of the Iller. This created waterways with a low gradient and the pre-alpine watercourse characteristics were lost.  Through the construction of side arms, an attempt is being made to extend the river habitats with natural bed layers and a high habitat function. It enables an approximation to the natural, branched course of the watercourse with its numerous side channels.