The Tamil Nadu Legislative Assembly unanimously adopted a resolution on 19 June 2026 against the Karnataka government's Mekedatu dam proposal.
Tamil Nadu sought the constitution of a new tribunal on the Mekedatu project, describing it as “inadmissible” and “impermissible.”
The resolution objected to Karnataka's unilateral proposal to construct a balancing reservoir across the Cauvery River at Mekedatu.
It stated that the project violates the final award of the Cauvery Water Disputes Tribunal (5 February 2007) and the Supreme Court of India judgment (16 February 2018).
The resolution urged the Union Government not to grant any technical or environmental clearance to the Mekedatu project.
It noted that the Cauvery basin is a deficit basin and that its available water has already been apportioned among the basin States.
The House requested the Centre to constitute a new Tribunal under Section 4 of the Inter-State River Water Disputes Act, 1956, and urged the Central Water Commission not to process or approve Karnataka's Detailed Project Report (DPR).