Shimohara Dam

Coordinates: 35°42′25″N 137°10′57″E / 35.70694°N 137.18250°E / 35.70694; 137.18250
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Shimohara Dam
Official name下原ダム
LocationGero, Gufu, Japan.
Coordinates35°42′25″N 137°10′57″E / 35.70694°N 137.18250°E / 35.70694; 137.18250
Construction began1933
Opening date1938
Dam and spillways
ImpoundsHida River
Height23 meters
Length102.5 meters
Reservoir
Total capacity2,936,000 m3
Catchment area1,147.0 km2
Surface area35 hectares
Power Station
Installed capacity22.0 MW

Shimohara Dam (下原ダム, Shimohara damu) is a dam in the city of Gero, Gifu Prefecture, Japan on the middle reaches of the Hida River, which is part of the Kiso River system. The dam is a concrete gravity dam with a height of 23.0 meters. It was completed in 1938 by the Toho Electric Power Company as part of the pre-war Hida River Development Project and was taken over by the Chubu Electric Power Company from 1951. The dam was constructed exclusively for hydroelectric power generation and generates a maximum of 22,000 kilowatts at the Shimohara Power Station downstream of the dam. The dam is located with the borders of the Hida-Kisogawa Quasi-National Park.