The interstate river of Cauvery has remained a matter of contention between the Indian states of Karnatake and Tamil Nadu for years. However, now that the state of Karnataka has decided to construct a reservoir over the river, affecting the downflow to the State of Tamil Nadu, which has the potential to affect many inhabitants in the State of Tamil Nadu, the state has now approached the Supreme Court with an application for urgent orders to stop the permission given by the Central Water Commission (CWC) for the construction of the same. TN has challenged the permission given by the CWC and the unilateral action by the State of Karnataka under their instrumentality named Cauvery Neervari Nigama Ltd. TN had already sent out letters about the issue to Ministry of Jal Shakti and CWC. The state has also seeks relief in the form of directions to CWC for rejecting the proposal and for restraining the Ministry of Environment & Forest and its agencies from giving clearances to the project.