Nam Ngum III & IV

Hydropower schemes
Nam Ngum III
Context & Issues

The Nam Ngum III and IV schemes tie in with an ambitious national programme to boost hydropower production, which the Laotian government intends to make a cornerstone of the country’s economic development.

Project characteristics

Lying 130 km north of Vientiane on the river Nam Ngum, a tributary of the Mekong, Nam Ngum III comprises:

  • a dam: 210 m high, 730 m long
  • a tunnel: 11 km long
  • a capacity: 480 MW


The neighbouring Nam Ngum IV project consists of:

  • a dam: 75 m high, 252 m long
  • a tunnel: 17 km long
  • a capacity: 240 MW