Iwakura Dam

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Dam in Nagano, Japan

Iwakura Dam

Location	Urugi, Nagano, Japan
Construction began	1935
Opening date	1936
Dam and spillways
Height	25 m
Length	100.6 m
Dam volume	19,000 m³
Reservoir
Total capacity	435,000 m³
Catchment area	8.8 km²
Surface area	6 ha