| Hayakawa Dam | |
| Dam Type: | Embankment |
| Location: | Gunma Prefecture, Japan |
| Dam Length: | 241.8m (793.3feet) |
| Dam Height: | 26m (85feet) |
| Opening: | 1940 |
| Res Capacity Total: | 1200000m2 |
| Res Catchment: | 2.9km2 |
| Res Surface: | 10 hectares |
| Coordinates: | 36.4347°N 139.2636°W |
| Location Map: | Japan |
Hayakawa Dam is an earthfill dam located in Gunma Prefecture in Japan. The dam is used for irrigation. The catchment area of the dam is 2.9 km2. The dam impounds about 10 ha of land when full and can store 1.2 million cubic meters of water. The construction of the dam was completed in 1940.[1]