Taking into account the 2.5m diameter butterfly valve chamber, the reinforced shaft consists of a section inclined at 90% along 921 metres and with a diameter varying between 2.7 metres and 2.5 metres. It emerges at the Bâtiaz power plant at a height of approximately 463 meters to supply the plant’s distributor.
Technical file
| Construction year | 1967-1973 |
| Put into operation | 1975 |
| Municipality | Martigny-Combe |
| Altitude | 1080m. |
| Renovated | 2012 |
| Length of reinforced shaft | 921m. |
| Diameter | 2.4m |
| Max. flow | 35m³/sec |