| Name of river |
Satsunai River (branch of Tokachi River) |
| Location |
Nakasatsunai Village, Hokkaido |
| Type |
Concrete gravity dam |
| Dam height |
114.0m |
| Crest level |
EL. 488.0m |
| Crest length |
300.0m |
| Volume of dam body |
770,000m3 |
| Catchment area |
117.7km2 |
| Reservoir area |
1.7km2 |
| Reservoir gross capacity |
54,000,000m3 |
| Effective capacity |
42,000,000m3 |
| Storage for flood control |
25,000,000m3 |
| Capacity for water utilization |
17,000,000m3 (flood season) |
| 27,000,000m3 |
| Normal water level |
EL. 474.0m |
| Surcharge water level |
EL. 484.0m |
| Normal water level in flood season |
EL. 466.0m |
| Low water level |
EL. 447.5m |
