Mekedatu dam: PMK warns Tamil Nadu risks losing Cauvery water rights
Synopsis
PMK's Anbumani Ramadoss has caught Karnataka CM Shivakumar in what he calls a critical contradiction: Shivakumar's claim that Mekedatu will benefit farmers directly undercuts Karnataka's earlier promise that the dam is for drinking water only. Add a disputed submergence figure — 5,400 hectares versus the project report's 5,000 — and PMK argues Tamil Nadu now has fresh legal ammunition to block the project at the Centre and Supreme Court.
Key Takeaways
PMK leader Dr Anbumani Ramadoss on 30 August demanded Tamil Nadu take immediate legal action to protect Cauvery water rights against the proposed Mekedatu dam .
Shivakumar said his government would intensify dam construction efforts and seek Centre approval, comparing its benefits to the Krishnaraja Sagar dam .
Anbumani argued Shivakumar's farmer-benefit framing contradicts Karnataka 's earlier assurance that Mekedatu is solely a drinking water project.
A discrepancy in submergence area — 5,400 hectares cited by Shivakumar versus 5,000 hectares in the project report — raises concerns that storage could exceed the proposed 67 TMC .
PMK has called on Tamil Nadu to present Karnataka 's revised position before the Union government and the Supreme Court without delay.
PMK leader Dr Anbumani Ramadoss on 30 August accused the Karnataka government of fast-tracking the proposed Mekedatu dam and demanded that Tamil Nadu take immediate legal and constitutional steps to defend its Cauvery water rights. His warning followed remarks by Karnataka Chief Minister D.K. Shivakumar that his government would intensify efforts to build the dam and would soon seek Centre approval.
What Shivakumar Said
CM Shivakumar made the comments at the 111th birth anniversary celebrations of the late Sri Rajendra Swami of Suttur Mutt in Mysuru. He said the Mekedatu dam would benefit Karnataka's farmers just as the Krishnaraja Sagar dam had, and cited what he described as a favourable Supreme Court ruling as grounds for approaching the Union government for construction permission.
PMK's Core Objection
Anbumani argued that Shivakumar's farmer-benefit framing exposed a significant shift in Karnataka's stated position. By linking the dam to agricultural gains, the Chief Minister had effectively signalled that water stored in the reservoir could be used for irrigation — directly contradicting Karnataka's earlier assurance that the project was intended solely for drinking water supply and that no water would be diverted for agriculture.
The PMK leader said this contradiction also departed from the objectives stated in the project's detailed project report and, by itself, provided sufficient grounds for rejecting the proposal. He maintained that the development vindicated his party's long-standing concern that Karnataka would ultimately use stored water, thereby reducing Cauvery flows reaching Tamil Nadu.
Submergence Area Discrepancy
Anbumani also flagged a discrepancy in the reservoir's proposed size. While the project report reportedly estimated the submergence area at 5,000 hectares (approximately 12,500 acres), CM Shivakumar placed it at 5,400 hectares (roughly 13,500 acres). Anbumani argued that the larger figure could enable Karnataka to store more than the proposed 67 TMC of water. He further warned that an expanded reservoir would cause greater damage to forests, wildlife, and the surrounding ecosystem.
PMK's Demand
Anbumani called upon the Tamil Nadu government to place Karnataka's latest position before both the Union government and the Supreme Court without delay. He said the state must not allow the project to proceed and must exhaust every available legal and constitutional avenue to block it. This comes amid long-running tensions over Cauvery water sharing, a dispute that has periodically strained relations between the two states for decades.
Point of View
However casually, hands PMK and Tamil Nadu a fresh legal argument at the Supreme Court. The submergence discrepancy — 400 hectares unaccounted for — is equally telling: if storage capacity is understated in the project report, the entire environmental and water-sharing calculus changes. Tamil Nadu's silence so far has been its biggest liability in this dispute, and PMK is right to press for urgency.
NationPress
30 Aug 2026
Frequently Asked Questions
What is the Mekedatu dam and why is it controversial?
The Mekedatu dam is a proposed reservoir project on the Cauvery river in Karnataka , near its confluence with the Arkavathi river. Tamil Nadu opposes it, fearing it will reduce Cauvery water flows to the state; environmental groups have also raised concerns about forest and wildlife damage.
Why has PMK objected to Karnataka CM Shivakumar's latest remarks?
PMK leader Dr Anbumani Ramadoss argues that Shivakumar 's claim that Mekedatu will benefit farmers contradicts Karnataka 's earlier assurance that the dam is purely a drinking water project. He says this contradiction exposes intent to use stored water for irrigation, reducing flows to Tamil Nadu .
What is the discrepancy in the Mekedatu submergence area?
The project's detailed project report reportedly estimates the submergence area at 5,000 hectares (about 12,500 acres ), while CM Shivakumar cited 5,400 hectares (roughly 13,500 acres ). PMK argues the larger figure could allow Karnataka to store more than the proposed 67 TMC of water.
What has PMK demanded from the Tamil Nadu government?
PMK has urged the Tamil Nadu government to immediately place Karnataka 's revised position before the Union government and the Supreme Court , and to use every available legal and constitutional avenue to prevent the dam's construction.
What did Karnataka CM Shivakumar say about the Supreme Court ruling?
CM Shivakumar cited a Supreme Court ruling he described as favourable to Karnataka as the basis for approaching the Union government for permission to construct the Mekedatu dam . He did not specify which ruling he was referring to.
