| Project Name | Nam San 3B |
| Status | Operational |
| River | Nam San |
| Sub-basin | Mekong tributary |
| COD | 2015 |
| Capacity (MW) | 45 |
| Annual Gen. (GWh) | 232 |
| Dam Type | Conventional storage |
| Height (m) | 18 |
| Turbine Type | Francis |
| Turbine Configuration | 3 × 15 MW |
| Spillway Type | Uncontrolled crest |
| Spillway Cap. (m³/s) | 1200 |
| Owner & Shareholders | BCPG Public Company Ltd. |
| Customer | EDL (future: EVN) |