Construction of a fish migration facility at the Mooshauser Schwelle (Iller)

The Mooshauser Schwelle at the Iller is currently impassable for aquatic organisms such as fish or microorganisms moving along the river bed. Due to local conditions, the construction of a ramp is not possible. The passage is therefore made by a fish ladder. It runs along the bank next to the weir and connects the upper and lower water. Different variants, such as a near-natural bypass channel or a technical fish ladder are being investigated. Structural, hydraulic, ecological and economic criteria are compared for the different variants. The measure is part of the project Agile Iller.