| Project Name | Nam Ou 4 |
| Status | Operational |
| River | Nam Ou |
| Sub-basin | Nam Ou cascade |
| COD | 2020 |
| Capacity (MW) | 132 |
| Annual Gen. (GWh) | 519 |
| Dam Type | Concrete gate dam |
| Height (m) | 60 |
| Turbine Type | Bulb |
| Turbine Configuration | 3 × 44 MW |
| Spillway Type | Gated spillway |
| Owner & Shareholders | Nam Ou Power Co., Ltd. (Sinohydro 85%, EDL 15%) |
| Customer | Power Construction Corporation of China |