Tamil Nadu would approach the Supreme Court and will not be a 'silent spectator' if Kerala Government went ahead with its plan to build a dam across the Siruvani river, Public Works Minister K V Ramalingam has said.

"Tamil Nadu will not give up its rights with regard to Siruvani and Mullaperiyar," he told reporters here yesterday. He said Chief Minister Jayalalithaa had written to the Prime Minister asking him to advise Kerala not to proceed with the irrigation scheme or any other project on the Siruvani at in violation of Cauvery Water Disputes Tribunal's final order.