Flood Protection and Renaturation Muri Near Bern, Right Bank of the River Aare

The flood protection system in Muri on the right bank of the River Aare was comprehensively rehabilitated in the winter of 2012/13 from the Auguet bridge to the mouth of the river Gürbe over a length of 2.4km. It is part of the project: “Flood Protection and Revitalisation of the Floodplain at River Aare/Mouth of the River Grübe”.  

The river bank in Wehrliau was secured with natural stones and the old concrete units were disassembled. In addition, the level of the dam was raised with the trail along the bank. The drinking water catchments located behind the dams are thereby protected from flooding and water supply to Muri and local communities is secured. As in Wehrliau, old concrete structures were removed in Haldenau so that in the event of the Aare flooding it can assume more space and form the bank itself. The new 600m long side channel and newly constructed amphibian ponds have created an even more ecologically valuable aquatic landscape in Haldenau. In Bodenacker the course of the River Aare was optimised at Fähribeizli and aligned to the confluence of the Gürbe. The River Giesse was upgraded along some points. New ponds were created for amphibians.

Main Data

  • Length of River Aare section: 2.4 km
  • Length of new side channel: 600 m
  • Removal of concrete structures (groynes, control systems): 11,000 m3
  • Riprap: 54,000 t
  • Dam backfill: approx. 8,000 m3
  • Excavation / removal: approx. 2,000 m3


Civil Engineering Office Bern Canton, OIK II


IUB Engineering AG in an engineering consortium

Construction period


Construction costs

CHF 3.1 million

Scope of services

  • Detailed project
  • Tendering
  • Execution incl. construction supervision