Samanalawewa Dam photograph

Samanalawewa Dam

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Opened 1992
Construction cost74. 31 billion JPY
Spillway capacity3,600 m3/s (130,000 cu ft/s)
Annual generation405 GWh
ImpoundWalawe River
Height (foundation)11036100
Date of Reg.
Date of Upd.
ID3061708
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About Samanalawewa Dam


The Samanala Dam is a dam primarily used for hydroelectric power generation in Sri Lanka. Commissioned in 1992, the Samanalawewa Project is the third-largest hydroelectric scheme in the country, producing 405 GWh of energy annually. It was built with financial support from Japan and the United Kingdom.

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