MW Subansiri Lower Hydroelectric Project at Gerukamukh has begun commercial operation of its fifth 250 MW unit, taking operational capacity to 1,250 MW.Get breaking news anytime, anywhere.. NHPC’s Subansiri Lower hydel project has begun commercial operation of its fifth 250 MW generating unit, taking the 2,000 MW project’s operational capacity to 1,250 MW, or 62.5% of its.