Niwaki Dam is a concrete gravity dam located in Saga Prefecture in Japan. The dam is used for irrigation. The catchment area of the dam is 1.2 km². The dam impounds about 9 ha of land when full and can store 600 thousand cubic meters of water. The construction of the dam was started on 1985 and completed in 1994.[1]

Niwaki Dam
Location of Niwaki Dam in Japan
Location	Saga Prefecture, Japan
Coordinates	33°7′33″N 129°57′35″E
Construction began	1985
Opening date	1994
Dam and spillways
Height	26.2m
Length	130m
Reservoir
Total capacity	600 thousand cubic meters
Catchment area	1.2 sq. km
Surface area	9 hectares

References

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