Mullaperiyar Dam issue

Why in News?

Tamil Nadu continues releasing water from the Mullaperiyar dam in Kerala, operated under a 999-year lease. With rising water levels, 13 spillway shutters were opened. The Idukki reservoir also saw increased storage, surpassing last year’s levels significantly.

Description:

  • Location: In Kerala, built in the late 1800s on the Periyar River; leased to Tamil Nadu for 999 years in 1886.
  • Purpose: Diverts water to Tamil Nadu for irrigation.
  • Dispute:
    • Kerala cites safety concerns (earthquake-prone).
    • Tamil Nadu wants to raise the water level to 142 ft for better usage.
  • SC Rulings:
    • 2006 & 2014: Allowed TN to raise water level.
    • Kerala’s law to block it was struck down as unconstitutional.
  • Current Issue (2024): TN accuses Kerala of blocking maintenance work despite Dam Safety Act.
  • Dam Safety Act, 2021: Establishes NDSA to regulate dam safety; NDSA oversees inter-state dams like Mullaperiyar.
Mullaperiyar Dam:

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