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Mullaperiyar Dam Dispute UPSC NOTE


  • The Issue: Disagreement between Kerala and Tamil Nadu regarding the Mullaperiyar dam.

  • It is a 128-year-old masonry gravity dam located in Kerala's Idukki district.

  • Owned and operated by Tamil Nadu.

  • Provides water for irrigation in Tamil Nadu.

Kerala's Move:

  • Requested a new Terms of Reference (ToR) from the Expert Appraisal Committee (EAC) for a new Environmental Impact Assessment (EIA) to build a new dam.

  • Cited expired ToR and need for fresh environmental data due to recent floods.

Importance of Environmental Impact Assessment

  • EIA is a good tool for prudent environment management.

  • It is government-policy that any industrial project in India has to secure EIA clearance from the Environment Ministry before approval for the project itself.

Tamil Nadu's Objection:

  • Claimed Kerala's move violates Supreme Court orders upholding the existing dam's safety.

  • Argued a new dam needs their permission and Kerala's actions are in contempt of court.

  • Threatened legal action if Kerala proceeds.

Kerala's Defense:

  • Rejected Tamil Nadu's claims, stating the Supreme Court previously dismissed objections to the earlier ToR and EIA clearance.

  • Emphasized the need for a new EIA due to changed environmental conditions.

  • Requires new ToR for fresh data collection and Detailed Project Report (DPR) for the new dam.


  • Legal battle likely as Kerala seeks to build a new dam, requiring Tamil Nadu's consent as per a Supreme Court order.



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Learnerz IAS | Concept oriented UPSC Classes in Malayalam: Mullaperiyar Dam Dispute UPSC NOTE
Mullaperiyar Dam Dispute UPSC NOTE
Learnerz IAS | Concept oriented UPSC Classes in Malayalam
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