Lower Subansiri Hydroelectric Project (LSHP)

Lower Subansiri Hydroelectric Project Latest News

The NHPC’s plan to start generating electricity from the 2000 megawatt Lower Subansiri Hydroelectric Project (LSHP) has triggered downstream impact worries in Assam.

About Lower Subansiri Hydroelectric Project 

• It is a 2000 MW run-of-the-river hydro project being constructed on the Subansiri River, a tributary of the Brahmaputra.
• It is located on the borders of Arunachal Pradesh and Assam.
• It will be the single largest hydroelectric plant in India when completed.
• The project is being developed by the state-run National Hydro Power Corporation (NHPC).

Lower Subansiri Hydroelectric Project Features

• It consists of a concrete gravity dam, which will be 116 m high from the riverbed level and 130 m from the foundation. 
• The length of the dam will be 284 m. The gross storage capacity of the reservoir will be 1.37 km3.
• The powerhouse will be equipped with eight 250 MW Francis turbines located on the surface on the left bank of the river. 
• It will also have eight horseshoe-shaped headrace tunnels (diameter 9.5m and length varying from 608m to 1,168m), eight horseshoe-shaped surge tunnels (diameter 9.5m and length varying from 400m to 485m), and eight circular penstocks (diameter varying between 400m and 485m and length between 7m and 9.5m).
• A tailrace channel (35m-long and 206m-wide) will take the water discharged by the turbines back to the river.

Source: TH

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