Regulating Dam Port, Seeland, Switzerland

Of insufficient retaining capacity, another one in 1887 that also showed its limits, especially during a flood in 1910, quickly replaced it.

Soon, the cantons of Vaud, Neuchâtel and Fribourg required its replacement, but it was only modified in 1911 and 1915.

Finally, the building of the new regulating dam was started in Port in 1936, and completed and commissioned in 1939.

The three lakes act as a buffer zone, absorbing waters of the Aare in the event of any upstream flooding as far as the lakes Thun and Brienz and of course “Grand Marais”.

[1] The system was completed with the Flumenthal dam regulating the flow further downstream of the merging of river Emme.