Ōmachi Dam
The Ōmachi Dam is a concrete gravity dam on the Takase River just west of Ōmachi in Nagano Prefecture, Japan. Construction of the dam began in 1975 and it was completed in 1985. The primary purpose of the dam is water supply and it also supports a 13 MW hydroelectric power station.[3] It is owned by TEPCO.[1]
| Ōmachi Dam | |
|---|---|
 | |
  Location of Ōmachi Dam in Japan | |
| Country | Japan |
| Location | Ōmachi |
| Coordinates | 36°30′53″N 137°46′53″E |
| Status | Operational |
| Construction began | 1972 |
| Opening date | 1985 |
| Owner(s) | TEPCO |
| Dam and spillways | |
| Type of dam | Gravity |
| Impounds | Takase River |
| Height | 107 m (351 ft) |
| Length | 338 m (1,109 ft)[1] |
| Dam volume | 766,000 m3 (1,001,890 cu yd) |
| Spillways | 2 |
| Spillway type | 4 x radial gates |
| Spillway capacity | 1,910 m3/s (67,451 cu ft/s) |
| Reservoir | |
| Total capacity | 33,900,000 m3 (27,483 acre⋅ft) |
| Active capacity | 28,900,000 m3 (23,430 acre⋅ft) |
| Surface area | 110 ha (272 acres) |
| Normal elevation | 898 m (2,946 ft)[2] |
| Power Station | |
| Commission date | April 1985 |
| Hydraulic head | 63.4 m (208 ft) |
| Turbines | 1 x 13 MW Francis-type |
| Installed capacity | 13 MW |
References
- "Omachi Dam". Japan Dam Handbook. Retrieved 8 August 2011.
- "Omachi Dam". DamMania. 28 April 2003. Retrieved 8 August 2011.
- "Tokyo Electric Power Plant Omachi" (in Japanese). Suiryoku.com. Retrieved 8 August 2011.
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