​​Cheruthoni Dam idukki

​​The Cheruthoni Dam

, located in Idukki District, Kerala, India, is a 138m tall concrete gravity dam. This dam was constructed in 1976 as part of the Idukki Hydroelectric Project along with two other dams Idukki and Kulamavu. The Government of Canada aided the Project with long-term loans and grants. The dam was constructed by HCC (Hindustan Construction Company Ltd.) and the consultant was S.N.C.Inc., Canada.

The water impounded by these three dams of Idukki, Cheruthoni & Kulamavu has formed a single reservoir spread over 60 km² at a height of 2300 ft above Mean Sea Level. The Idukki Dam is a double curvature arch dam constructed across Periyar River in a narrow gorge between two granite hills and is the tallest double curvature arch dam in Asia. Cheruthoni Dam is located 1 km west of Idukki dam. The spill way of the Idukki Reservoir is in the Cheruthoni dam. Kulamavu Dam was constructed to prevent the water from escaping through a rivulet called Kilivally, 30 km west to Idukki Arch Dam. It is a 100 metres tall Masonry gravity dam. Construction of this Cheruthoni Dam, Idukki Arch Dam and Kulamavu Dam created an artificial lake of 60 km² and the water stored, is used for electricity generation at the Idukki power station. Located at Moolamattom, it is the biggest underground power station in India and the pressure shaft is the largest in the country. Cheruthoni is the largest and highest gravity dam in Kerala. Storage of water in Idukki Reservoir started in February, 1973. Idukki power station was Commissioned in February 1976 by Prime Minister Indira Gandhi.
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