Subansiri Lower Hydro Electric Project (SLHEP) The first of eight units of the 2,000-MW Subansiri Lower Hydroelectric Project has begun undergoing a test run, signaling its imminent commissioning. About Subansiri Lower Hydro Electric Project (SLHEP) It is an under-construction gravity dam on the Subansiri River in North Eastern India on the borders of Arunachal Pradesh and Assam. It is a run-of-river project. It will be the single largest hydroelectric plant in India when completed. About The Subansiri River The Subansiri River is a trans-Himalayan river and the largest 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.
