Theun-Hinboun Hydropower Plant

To optimize the potential of the Nam Theun basin to deliver energy during the dry season, when many other Lao power plants run at reduced capacity.
the expansion project brought the total combined generating capacity of THPC to 510 MW, with much of the water from the new reservoir being used to generate power twice.
headrace tunnel length: 300 m and diameter:11m method: New Austria Tunneling Method (NATM)