| Samuel Hydroelectric Dam | |
|---|---|
 Satellite image. Deforestation (light colour fishbone patterns) is clearly visible | |
  Location of Samuel Hydroelectric Dam in Brazil | |
| Official name | Usina Hidrelétrica Samuel |
| Country | Brazil |
| Location | Rondônia |
| Coordinates | 8°45′06″S 63°27′17″W / 8.751663°S 63.454669°W |
| Purpose | Hydroelectric power generation |
| Status | Active |
| Construction began | April 1982 |
| Opening date | 24 July 1989 |
| Owner(s) | Eletrobras Eletronorte |
| Reservoir | |
| Active capacity | 3,200,000,000 cubic metres (1.1×1011 cu ft) |
| Surface area | 560 square kilometres (220 sq mi) |
| Maximum length | 40 kilometres (25 mi) |
| Maximum width | 20 kilometres (12 mi) |
| Normal elevation | 97 metres (318 ft) |
| Power Station | |
| Operator(s) | Eletrobras Eletronorte |
| Installed capacity | 216 MW |
| Capacity factor | 85 MW assured output |
The Samuel Hydroelectric Dam (Portuguese: Usina Hidrelétrica Samuel) is a 216 MW hydroelectric dam near Porto Velho, Rondônia, Brazil. The project was controversial since it had a major environmental impact and during operations released more greenhouse gases than a comparable oil-fuelled plant.