Mullaperiyar Environmental ... vs Union Of India & Ors

The Supreme Court addressed the safety concerns regarding the Mullaperiyar Dam, originally constructed under an agreement dated 29th October 1886. The Court held that the water level could not be raised beyond 136 feet due to safety issues arising from leakage, despite recommendations from the Central Water Commission for potential increases to 142 feet following necessary safety measures. The Court emphasized the need for cooperation between the States of Tamil Nadu and Kerala in ensuring the dam's safety and upholding the terms of the original agreement, which remains intact despite modifications in 1970.