Mullaperiyar Dam Dispute

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Mehnat Aapki, Guidance Humari

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Mullaperiyar Dam Dispute

Why in News

A five-member sub-committee under the National Dam Safety Authority (NDSA) recently carried out a safety inspection of the Mullaperiyar Dam in Kerala’s Idukki district. The inspection has again brought attention to the long-running dispute between Kerala and Tamil Nadu over dam safety, water level and operational control.

Background

The Mullaperiyar Dam was constructed between 1887 and 1895 on the Periyar river system in present-day Kerala. Although the dam is located in Kerala, it is operated by Tamil Nadu under the historic 1886 lease agreement. Its waters are diverted eastward to support irrigation and drinking-water needs in several southern districts of Tamil Nadu.

Core of the Dispute

Kerala argues that the more than century-old masonry dam poses safety concerns, especially because the region is seismically sensitive. It favours a new dam while assuring continued water supply to Tamil Nadu. Tamil Nadu maintains that strengthening works have made the dam safe and seeks to utilise water up to the levels permitted by the Supreme Court.

Judicial and Institutional Position

The Supreme Court allowed the water level to be raised to 142 feet and, in its 2014 Constitution Bench judgment, struck down Kerala’s attempt to restrict it through State legislation. A Supervisory Committee was created to monitor dam safety. Later, the framework was aligned more closely with the Dam Safety Act, 2021 and NDSA oversight.

Current Status and Significance

The dispute remains unresolved. Tamil Nadu continues to press for operational rights and higher storage, while Kerala stresses structural safety and a replacement dam. The issue is therefore not only about water sharing but also about federalism, disaster risk, legacy agreements and inter-State trust.

Analytical Questions

1. Is the Mullaperiyar issue mainly a water dispute or a dam-safety dispute?

Answer: It is both. Tamil Nadu sees the dam mainly as a reliable source of irrigation and drinking water. Kerala looks at it mainly from the safety angle. A lasting solution must therefore protect Tamil Nadu’s water needs while also addressing Kerala’s concerns about the safety of an ageing structure.

2. If Kerala is ready to continue supplying water, why is a new dam still controversial?

Answer: Because a new dam raises questions about control, cost, design, water levels and future rights. Tamil Nadu fears that a new structure may weaken its existing legal position. Kerala sees it as a safer long-term option. So the challenge is not only engineering. It is also about trust and legal guarantees.

3. How should the administration balance public safety with agricultural dependence on the dam?

Answer: The first priority should be credible scientific assessment. Water needs should not be ignored, but safety cannot be compromised. Authorities should use regular inspections, real-time monitoring, emergency plans and transparent data sharing. If risk increases, temporary water-level adjustments can be made without disrupting essential irrigation more than necessary.

4. What does the Mullaperiyar dispute teach us about inter-State federalism in India?

Answer: It shows that old agreements can remain relevant even when political boundaries and public concerns change. Courts can settle legal questions, but cooperation is still necessary for implementation. States need regular dialogue and shared technical institutions. Federal disputes are easier to manage when data, decisions and risks are openly shared.

5. If you were the District Collector in a downstream district, what would be your practical priority?

Answer: My immediate priority would be disaster preparedness. I would update evacuation plans, identify vulnerable settlements, test warning systems and conduct mock drills. I would also ensure coordination with dam authorities, police, health services and local bodies. Public communication should be factual so that people remain prepared without unnecessary panic.