Question: what is the difference between idukki dam and cheruthoni dam

title: Cheruthoni Dam
text: The water impounded by these three dams of Idukki , Cheruthoni & Kulamavu has formed a single reservoir spread over 60 sq.km on 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 escape 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 km and the water stored , is used for production of electricity at the Moolamattom Power house . The power house at Moolamattom 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 . Moolamattom Power Station was Commissioned in February 1976 by Prime Minister Indira Gandhi . 

Answer: answer: The Idukki Dam is the tallest double curvature arch dam in Asia. Cheruthoni is the largest and highest gravity dam in Kerala.