Kerala and Tamil Nadu have been at loggerhead over the Mullaperiyar dam, built in Idukki under an 1886 accord between the then Maharaja of Travancore and the erstwhile British Raj. While the dam is located in Kerala, its waters serve Tamil Nadu. And this is the problem.
http://www.ummid.com/news/2011/November/28.11.2011/protest_in_kerala.htm
http://www.ummid.com/news/2011/November/28.11.2011/protest_in_kerala.htm
