New wastewater vortex drop shaft

The Municipality of Muri-bei-Bern has an General Drainage Plan (GDP) that include several urgent measures for the sewerage network in the Mettlen district. At the heart of the project was a double-flow vortex chamber, in which the wastewater overcomes a height difference of about 15 m in a controlled spiral path. The inlet to the vortex chamber and the outlet to the stormwater basin below were constructed without trenches by micro tunnelling. In addition, a new storm drain and a new relief channel to the River Aare were constructed.

Our tasks

HOLINGER carried out all planning steps from the project planning to the realisation of the entire structure, including inlets and outlets as well as the conversion of the underlying stormwater overflow basin.

Project management