Kosaka Dam (Japanese: 香坂ダム) is an embankment dam on the Kosaka river in the Saku, Nagano, Japan, completed in 1972.[1] The primary purpose is flood control, because villages in the Kosaka River basin suffered heavy damage from the floods.

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  Lake Kōsaka Dam
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  Kōsaka Dam office and spillway

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Kōsaka Dam
Country	Japan
Location	Saku, Nagano
Coordinates	36°15′54″N 138°32′55″E
Purpose	Flood control
Status	Operational
Construction began	1969 (1969)
Opening date	1972 (1972)
Construction cost	1,222,000,000 JPY
Dam and spillways
Type of dam	Embankment dam
Impounds	Kosaka river
Height (thalweg)	38.5 m
Length	184.0 m
Dam volume	334,000 m3
Reservoir
Creates	Lake Kōsaka Dam
Total capacity	1,050,000 m3
Active capacity	870,000 m3
Catchment area	14 km2
Surface area	11 ha

References

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