The Supreme Court has dismissed a petition filed by Tamil Nadu to reappraisal a November 2025 decision that termed the State’s situation to Karnataka’s projected Mekedatu Balancing Reservoir cum Drinking Water project arsenic “premature”.
The reappraisal petition was dismissed by a Bench of the Chief Justice of India Surya Kant, Justices Vinod K. Chandran and Vipul M. Pancholi via circulation successful their chambers connected April 15, 2026. The bid was lone published recently.
“We person cautiously gone done the contents of the reappraisal petition and the papers appended therewith. We are satisfied that nary lawsuit for review of the judgement dated November 13, 2025 is made out. The reappraisal petition is, accordingly, dismissed,” the abbreviated bid said.
On November 13, 2025 the tribunal had said the Detailed Project Report (DPR) connected the reservoir, submitted by Karnataka, was lone being considered by the experts successful the Cauvery Water Management Authority (CWMA) and Cauvery Water Regulation Committee (CWRC).
The Central Water Commission (CWC) had already made it wide that immoderate acceptance of the DPR would beryllium fixed lone aft approvals from CWMA and CWRC. The tribunal had said that successful lawsuit of support of DPR, the affected parties, including Tamil Nadu, would beryllium escaped to instrumentality measures successful accordance with the law. But for now, it was excessively early, the tribunal had concluded.
The apex tribunal had said, Karnataka, anyway, would beryllium bound to merchandise Cauvery h2o allotted to little riparian Tamil Nadu and the Union Territory of Puducherry, which was downstream.
The determination had been based connected an exertion moved by Tamil Nadu seeking a absorption to restrain the CWMA from deliberating the projected reservoir project.
The exertion had stated that the readying of the Mekedatu task with a capableness of 67.16 TMC ft. (thousand cardinal cubic feet), and procreation of a 400 MW task worthy ₹9,000 crore was successful “gross violation” of the determination of the Cauvery Water Disputes Tribunal of February 5, 2007, which was affirmed by the Supreme Court itself connected February 16, 2018.

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