Ohsawa Dam
Location of Ohsawa Dam in Japan
Official name	大沢ダム
Location	Iwate Prefecture, Japan
Coordinates	39°35′13″N 141°44′38″E / 39.58694°N 141.74389°E / 39.58694; 141.74389
Construction began	1939
Opening date	1943
Dam and spillways
Height	30.8m
Length	67m
Reservoir
Total capacity	170 thousand cubic meters
Catchment area	17.3 sq. km
Surface area	2 hectares

Ohsawa Dam (Japanese: 大沢ダム) is a gravity dam located in Iwate Prefecture in Japan. The dam is used for power production. The catchment area of the dam is 17.3 km². The dam impounds about 2 ha of land when full and can store 170 thousand cubic meters of water. The construction of the dam was started on 1939 and completed in 1943.^[1]

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