Sannosawa No.1 Dam

Sannosawa No.1 Dam
Sannosawa No.1 Dam Location within Japan
Location	Hokkaido Prefecture, Japan
Coordinates	43°10′26″N 141°50′30″E
Opening date	1924
Dam and spillways
Height	20 m (66 ft)
Length	168 m (551 ft)
Reservoir
Total capacity	710,000 m3 (25,000,000 cu ft)
Catchment area	1.6 km2 (0.62 sq mi)
Surface area	11 hectares (27 acres)

Sannosawa No.1 Dam (Japanese: 三の沢第一ダム) is an earthfill dam located in Hokkaido Prefecture in Japan. The dam is used for irrigation. The catchment area of the dam is 1.6 km². The dam impounds about 11 ha of land when full and can store 710 thousand cubic meters of water. The construction of the dam was completed in 1924.