Renaturation Tobelbach and Bibersee, Cham (ZG)
In the course of the meliorations in the middle of the 20th century the Bibersee was drained and the Tobelbach was straightened in a channel secured with concrete slabs. With the renaturation project, the stream was renaturalized and the Bibersee was restored.
Kanton Zug
Hydraulic engineering