• Access road and current outlet of the surge tank of Corbes
    Access road and current outlet of the surge tank of Corbes
    Safety gallery of Corbes

Safety gallery of Corbes


Electricité d'Emosson SA


PRA Consulting Engineers Ltd 


Realization of the complete set of engineering services from feasibility study to commissioning. 

Period of realization 

2014 - 2016

Construction costs 


Project description

Realization of a new hydraulic outlet gallery between the current surge tank of Corbes and the lake of Emosson in order to suppress the spillages.

The main characteristics of the works are the following:

  • Length 483 m,
  • Excavation method: drill and blast,
  • Section of excavation: 13.3 m2,
  • Two additional reinforced concrete walls with iron access gate,
  • Hydraulic capacity of the gallery: 40 m3/s.







The strong mobilization of the resources on the project allowed to respect the schedule for the entire satisfaction of the Client.

The hydraulic design optimization allowed to cut the construction costs of the project.

The capacity of the gallery was determined with complex hydraulic modelling.  

Click on a city to display our contact information.

Lausanne Geneva London Paris Lyon Aix-les-Bains Marseille Algiers Neuchâtel Fribourg Sion Biel Delémont Bern Schwyz Zug / Baar Zürich Luzern Toulouse Constantine Aarau Turin


BG Ingénieurs Conseils / BG Ingenieure und Berater / BG Consulting Engineers
Siège / Sitz / Head Office

Avenue de Cour 61
Case postale 241
CH-1001 Lausanne
Tel. +41 58 424 11 11