India set to start Subansiri Lower Hydroelectric Project (SLHEP)

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Relevance: India set to start mega hydropower project near China border - The Times of India

The Subansiri Lower Dam, officially named Subansiri Lower Hydroelectric Project (SLHEP), is an under construction gravity dam on the Subansiri River in North Eastern India. It is located 2.3 km (1.4 mi) upstream of Subansiri River on Arunachal Pradesh. Described as a run-of-the-river project by NHPC Limited, the Project is expected to supply 2,000 MW of power when completed. The project has experienced several problems during construction to include landslides, re-design and opposition. It was expected to be complete in 2018. It is notable that, if completed as planned, it will be the largest hydroelectric project in India.

The project was originally scheduled to be completed by September 2010 but commissioning could not be achieved as per the original schedule due to various reasons, the major of them were: initial delay in start of project due to delay in transfer of Forest Land, agitation by some section of stakeholders of Assam raising issues of safety of Dam and its downstream impact, proceedings in the Hon’ble NGT, etc. The signing of MoA with Govt. of Assam was done on 23.08.2019 and the works were resumed w.e.f. 15.10.2019. Now, as per project authorities, two units (Unit#1 and Unit#2 both of capacity 250 MW each) are scheduled to be commissioned by August 2022 and overall commissioning of the project is scheduled by August 2023.

The Subansiri River (Chayul Chu in Tibet) is a trans-Himalayan river and a tributary of the Brahmaputra River that flows through Tibet's Lhuntse County in the Shannan Prefecture, and the Indian states of Arunachal Pradesh and Assam. The Subansiri is 442 kilometres (275 mi) long, with a drainage basin 32,640 square kilometres (12,600 sq mi). It is the largest tributary of the Brahmaputra contributing 7.92% of the Brahmaputra's total flow.

  1. Wikipedia - 1
  2. Wikipedia - 2
  3. The Times of India
  4. Central Electricity Authority

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