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Sunni Dam Hydro Electric Project (HEP)

Oct. 28, 2025

The National Green Tribunal (NGT) has taken cognisance of a complaint alleging illegal dumping of muck into the Sutlej during blasting activities for the construction of the Sunni Dam hydroelectric project in Shimla district’s Sunni tehsil.

About Sunni Dam Hydro Electric Project (HEP):

  • It is a 382 MW run-of-the-river hydroelectric project.
  • It is being developed on the Satluj River in the Shimla and Mandi districts of Himachal Pradesh.
  • The project is owned by Satluj Jal Vidyut Nigam (SJVN), a collaborative venture between the government of India and the state government of Himachal Pradesh.
  • Sunni HEP will involve building a concrete gravity dam across the Satluj River and an underground powerhouse on the right bank of it.
  • The project will generate 1,382 million units of electricity annually.
  • The project is a part of the larger Luhri HEP, which is being developed in three distinct stages along the Satluj River within the northern Indian state of Himachal Pradesh.
    • The stages comprise the 210 MW Luhri Stage-1, the 172 MW Luhri Stage-II, and the 382 MW Sunni HEP.

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