| Nam Ngum Dam | |
|---|---|
  Location of Nam Ngum Dam in Laos | |
| Location | Vientiane Capital, Laos |
| Coordinates | 18°31′51″N 102°32′51″E / 18.53083°N 102.54750°E |
| Construction began | 1968 |
| Opening date | 1971 |
| Construction cost | US$97 million (over three phases) |
| Owner(s) | EDL |
| Dam and spillways | |
| Type of dam | Gravity dam |
| Impounds | Nam Ngum River |
| Height | 70 m (230 ft) |
| Length | 468 m (1,535 ft) |
| Spillway type | Radial |
| Reservoir | |
| Creates | Ang Nam Ngum |
| Total capacity | 4.7 km3 (3,800,000 acre⋅ft) |
| Catchment area | 8,460 km2 (3,266 sq mi) |
| Surface area | 370 km2 (140 sq mi) |
| Power Station | |
| Operator(s) | EDL-GEN |
| Commission date | 1971 |
| Hydraulic head | 45.5 m (149 ft) |
| Turbines | 2 x 17.5 MW Francis 3 x 40 MW Francis |
| Installed capacity | 155 MW |
| Annual generation | 865 GW |
The Nam Ngum Dam is a hydroelectric dam on the Nam Ngum River, a major tributary of the Mekong River in Laos. It was the first hydropower dam built in the Lao PDR.