Ōigawa Dam
| Oigawa Dam | |
|---|---|
| Official name | 大井川ダム |
| Location | Shizuoka Prefecture, Japan |
| Coordinates | 35°9′52.67″N 138°8′33.56″E / 35.1646306°N 138.1426556°E |
| Construction began | 1934 |
| Opening date | 1936 |
| Operator(s) | Chubu Electric Power |
| Dam and spillways | |
| Impounds | Ōi River |
| Height | 33.5 meters |
| Length | 65.8 meters |
| Reservoir | |
| Total capacity | 788,000 m3 |
| Catchment area | 537 km2 |
| Surface area | 13 hectares |
The Ōigawa Dam (大井川ダム, Ōigawa damu) is a dam on the Ōi River in Haibara District, Kawanehon, Shizuoka Prefecture on the island of Honshū, Japan. It has a hydroelectric power generating station owned by the Chubu Electric Power Company.