The Cheruthoni Dam, located in Idukki District, Kerala, India, is a 138m tall concrete gravity dam. Preliminary work on this project was initiated under the leadership of Superintending Engineer, E.U.Philipose. This dam was constructed in 1976 as part of the Idukki Hydroelectric Project along with two other dams Idukki and Kulamavu. The Canadian government aided the project with long-term loans and grants. The dam was constructed by HCC and the consultant was S.N.C. Inc., Canada,

The Idukki Dam is a double-curvature arch dam constructed across the Periyar River in a narrow gorge between two granite hills locally known as Kuravan and Kurathi in Idukki district in the state of Kerala, India. It is constructed and owned by the Kerala State Electricity Board. It supports a 780 MW hydroelectric power station in Moolamattom, which started generating power on 4 October 1975. At 168.91 metres (554.2 ft), it is one of the highest arch dams in Asia. The Indo-Canadian project was inaugurated by the Prime Minister Indira Gandhi on February 17, 1976.