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01/07/23 05:44 AM IST

Subansiri Lower Hydroelectric Project

In News
  • In a significant milestone towards completion of the 2,000 Mega Watt Subansiri Lower Hydroelectric Project located in Arunachal Pradesh and Assam and being executed by NHPC Limited the construction of dam till the top level of Elevation Level (EL) 210 M has been completed in all blocks.
About the project
  • SLHEP is an under-construction gravity dam (nearly 90% of the work completed) with capacity 2000 MW (8x250 MW).
  • It is the biggest hydroelectric project undertaken in India so far and is a run of river scheme on river Subansiri.
  • A run-of-river dam is one in which the flow of water in the river downstream of the dam is the same as the flow of water upstream of the dam.
  • In other words, the dam doesn't hold back/store water behind it; it runs with the river.
  • The construction of SLHEP is being undertaken by National Hydroelectric Power Corporation (NHPC) Limited.
Subansiri River
  • Subansiri, or “Gold River” is the largest tributary of the Upper Brahmaputra river.
  • It originates from the Tibetan Himalayas and makes its way to India via (Miri Hills) Arunachal Pradesh.
Gravity Dam
  • Gravity dam is constructed from concrete or cement (unlike mud and masonry stones used in embankments).
  • It is designed to hold back water by primarily utilising the weight of the material alone to resist the horizontal pressure of water pushing against it.
Source- PIB

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