Akao Dam | |
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Downstream face | |
Location | Nishiakao, Toyama Prefecture, Japan |
Coordinates | 36°22′34.06″N136°52′13.95″E / 36.3761278°N 136.8705417°E Coordinates: 36°22′34.06″N136°52′13.95″E / 36.3761278°N 136.8705417°E |
Purpose | Power |
Status | Operational |
Construction began | 1939 |
Opening date | 1942 |
Dam and spillways | |
Type of dam | Gravity |
Impounds | Shō River |
Height | 29.2 m (96 ft) |
Length | 153.4 m (503 ft) |
Dam volume | 28,000 m3 (37,000 cu yd) |
Spillway type | Crest overflow, 5 roller gates |
Reservoir | |
Total capacity | 1,465,000 m3 (1,188 acre⋅ft) |
Active capacity | 749,000 m3 (607 acre⋅ft) |
Catchment area | 778.1 km2 (300.4 sq mi) |
Surface area | .26 km2 (0.10 sq mi) |
Normal elevation | 336.7 m (1,105 ft) |
Power Station | |
Operator(s) | Kansai Electric Power Co., Inc. |
Commission date | 26 October 1978 |
Hydraulic head | 17.4 m (57 ft) |
Turbines | 1 x 34 MW Kaplan-type |
Installed capacity | 34 MW |
The Akao Dam is a gravity dam on the Shō River in Nishiakao village about 18 km (11 mi) south of Nanto in Toyama Prefecture, Japan. It was constructed between 1974 and 1978. The dam has an associated 34 MW hydroelectric power station which was commissioned in 1978. Of the nine dams on the Shō River it is the fifth furthest downstream. [1]
A gravity dam is a dam constructed from concrete or stone masonry and designed to hold back water by primarily using the weight of the material alone to resist the horizontal pressure of water pushing against it. Gravity dams are designed so that each section of the dam is stable, independent of any other dam section.
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