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NHPC Expedites Site Selection for Contested Siang Valley Dam

Researchers warn that ecological, cultural and seismic threats justify suspending site surveys for the 11,000 MW project.

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Overview

  • NHPC has stationed drilling equipment near Beging, Ugeng and Dite Dime to finalize a pre-feasibility report, yet essential investigations are delayed by local objections.
  • A coalition of 114 scientists and researchers called on June 9 to halt all construction, surveys and pre-clearance work, citing risks to biodiversity and Adi tribal heritage.
  • The dam is proposed as an 11,000 MW hydropower station intended as a strategic countermeasure to China’s 60 GW Yarlung Tsangpo project upstream of the Arunachal Pradesh border.
  • Experts highlight that the site falls within Seismic Zone V, raising concerns over earthquake-triggered landslides, reservoir-induced seismicity and potential structural failure.
  • Opponents warn that reservoir formation would submerge terraced wet rice fields, disrupt irrigation, displace Adi communities and breach domestic forest and biodiversity protection laws.