The Tamil Nadu Assembly has unanimously passed a resolution rejecting the Karnataka government’s plan to build a drinking water‑cum‑balancing reservoir at Mekedatu dam project. The move comes after the Supreme Court dismissed Tamil Nadu’s petition to review a November 2025 decision, calling the challenge “premature”.
Key Developments
- Tamil Nadu Assembly adopts a unanimous resolution opposing the reservoir proposal.
- Karnataka prepares to submit a revised Detailed Project Report (DPR) for the project.
- Supreme Court’s November 2025 judgment labels Tamil Nadu’s review request as premature.
- The project aims to impound 67.16 TMC ft of water at a cost of ₹9,000 crore, with a 400 MW hydro‑power component but no irrigation component.
Important Facts
The proposed reservoir will be located at Mekedatu, about 100 km from Bengaluru, on the Cauvery River. It is designed solely for drinking water supply and flow regulation, and will generate hydro‑electricity of 400 MW. There is no provision for irrigation, which differentiates it from many inter‑state water projects.
Exam Relevance
Inter‑state river disputes are a recurring theme in GS‑2 (Polity) and GS‑3 (Economy). Understanding the legal role of the Supreme Court in adjudicating such disputes is essential. The case also illustrates the importance of a DPR in project approval processes and the financial magnitude of large‑scale water infrastructure (₹9,000 crore), relevant for GS‑3. Moreover, the political dynamics between state legislatures, exemplified by the Tamil Nadu Assembly, highlight federal‑state relations, a key topic for GS‑2.
Way Forward
1. Dialogue: Both states should engage in a technical and political dialogue under the Cauvery Water Dispute Tribunal to address concerns about water allocation and environmental impact.
2. Environmental Clearance: A comprehensive environmental impact assessment must be completed before the revised DPR is submitted.
3. Legal Review: Any further legal challenge should be filed after the Supreme Court’s pronouncement, ensuring that procedural requirements are met.
4. Public Consultation: Stakeholder consultations, especially with communities dependent on the Cauvery, can help mitigate social opposition and align the project with broader water‑security goals.
By addressing these steps, the dispute can move from political brinkmanship to a solution that balances water needs, energy generation, and inter‑state harmony.