Ohara Dam

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Ohara Dam

Ohara Dam.jpg

Downstream face
Japan location map with side map of the Ryukyu Islands.svg
Red pog.svg
Location of Ohara Dam in Japan
Country Japan
Location Ohara, Toyama Prefecture
Coordinates 36°24′03.97″N136°54′32.51″E / 36.4011028°N 136.9090306°E / 36.4011028; 136.9090306 Coordinates: 36°24′03.97″N136°54′32.51″E / 36.4011028°N 136.9090306°E / 36.4011028; 136.9090306
Purpose Power
Status Operational
Construction began 1939
Opening date 1942
Dam and spillways
Type of dam Gravity
Impounds Shō River
Height 52 m (171 ft)
Length 158.2 m (519 ft)
Dam volume 93,000 m3 (122,000 cu yd)
Spillway type Crest overflow, 8 tainter gates
Reservoir
Total capacity 11,741,000 m3 (9,519 acre⋅ft)
Active capacity 5,099,000 m3 (4,134 acre⋅ft)
Catchment area 814.5 km2 (314.5 sq mi)
Surface area .56 km2 (0.22 sq mi)
Normal elevation 318.6 m (1,045 ft)
Power Station
Operator(s) Kansai Electric Power Co., Inc.
Commission date Original: 2 December 1942
New: 4 April 1980
Hydraulic head Original: 39.2 m (129 ft)
New: 52.6 m (173 ft)
Turbines Original: 3 x 17.1 MW Francis-type
New: 1 x 46.3 MW Francis-type
Installed capacity 97.6 MW

The Ohara Dam is a gravity dam on the Shō River in Ohara village about 17 km (11 mi) south of Nanto in Toyama Prefecture, Japan. It was constructed between 1939 and 1942. The dam has an associated 97.6 MW hydroelectric power station which was built in two parts. The first part of the power station (51.3 MW) was commissioned in 1942 and the second part of the power station (46.3 MW) was commissioned in 1980. Of the nine dams on the Shō River it is the fourth furthest downstream. [1]

Gravity dam

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.

Shō River river in Japan

The Shō River has its source in Mount Eboshi in the Shōkawa-chō area of Takayama, Gifu Prefecture, Japan. After flowing for 115 km (71 mi) through the northern part of Gifu Prefecture and the western part of Toyama Prefecture, it empties into Toyama Bay.

Nanto, Toyama City in Chūbu, Japan

Nanto is a city in Toyama Prefecture, Japan.

See also

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References

  1. "Hydroelectric power plant Soyama" (in Japanese). Suiryoku. Retrieved 16 July 2013.