Shiromaru Dam
Shiromaru Dam is in Okutama town, Nishitama-gun, Tokyo.
It was built to regulate the flow of the Tama River and to send water for power generation to Tamagawa Power Plant No.3 located down-river.
The dam releases a certain amount of water to maintain the river functionalities of the Tama River and for sightseeing purposes.
Water used to be released from the gate of Shiromaru Reservoir Dam, but for the efficient use of this water, the Shiromaru Power Plant was built in 2000.
Overflow straight gravity concrete dam
| Date of start of operation | February 1963 |
|---|---|
| Area for flooding | 0.09km2 |
| Total amount of water retention | 892,900m3 |
| Effective amount of water retention |
300,000m3 |
| Water intake level | 290.80m |
| Power plant name and water release level |
Tamagawa No.3: 209.95m Shiromaru: 265.60m |
| Type | Overflow straight gravity |
| Height | 30.3m |
| Length | 61m |
| Volume | 14,161m3 |
| Type of gate | Water inlet: Roller gate Flood way: Two-stage roller gate |
Snow-covered Shiromaru Dam
Aerial videos of Shiromaru Dam
Video for approx. 70 seconds
Construction of Shiromaru Dam
