Explanation:

Subansiri Lower Hydroelectric Project (SLHEP), is an under-construction gravity dam on the Subansiri river along the border of Assam and Arunachal Pradesh. Subansiri River (gold river), originates in the Tibet Plateau and enters India through Miri hills in Arunachal Pradesh. It is the largest tributary of Brahmaputra River. The project is being developed by the state-run National Hydro Power Corporation (NHPC). It will be the single largest hydroelectric plant in India when completed. The project is expected to be completed in 2023.