Okukubi Dam | |
---|---|
Official name | 億首ダム |
Country | Japan |
Location | Kin, Okinawa |
Coordinates | 26°27′54″N 127°55′54″E / 26.46500°N 127.93167°E |
Status | Operational |
Construction began | 2009 |
Opening date | March 2013 |
Construction cost | ¥3 billion (US$38.2 million) |
Owner(s) | Development and Construction Department, Okinawa General Bureau |
Dam and spillways | |
Impounds | Okukubi River |
Height | 39 m (128 ft) |
Length | 462 m (1,516 ft) |
Elevation at crest | 29 m (95 ft) |
Dam volume | 339,000 m3 (443,395 cu yd) |
Spillway type | Labyrinth weir |
Spillway capacity | 430 m3/s (15,185 cu ft/s) |
Reservoir | |
Total capacity | 8,560,000 m3 (6,940 acre⋅ft) |
Active capacity | 7,860,000 m3 (6,372 acre⋅ft) |
Catchment area | 14.6 km2 (6 sq mi) |
Surface area | 0.61 km2 (0 sq mi)[1] |
The Okukubi Dam (億首ダム) is a trapezoidal cemented, sand and gravel (CSG) dam on the Okukubi River in Kin, Okinawa Prefecture, Japan. Construction began in 2009 and its reservoir was filled by 31 March 2013.[2][3] It is the first trapezoidal CSG-type to be constructed as a main dam in the world.[4][5] Its purpose is to provide flood control and water for municipal use along with the irrigation of 70 ha (173 acres) of land.[6]
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