"We don't know when the full supply will resume. We have no other option but to cut production," S.S.Mohapatra, production director at NALCO, told Reuters. NALCO normally operates seven power units, producing about 800 megawatts of power to feed its smelter, which has an output of about 1,050 tonnes of aluminium daily. But the company does not have enough coal stocks to continue its normal operations. "The aluminium smelter was operating 823 pots. We are planning to shut 200 of them gradually in next few days", Mohapatra said. NALCO, the country's third-largest aluminium maker, produced 403,000 tonnes of aluminium out of its sole aluminium smelter at Angul in Odisha in 2012/13.