India's Tata Steel will start constructing a 6 million-tonne steel plant in Orissa from next month, its Managing Director HM Nerurkar said on Saturday.

"Eighty percent of the people have already been evacuated from the site and we hope to start the construction by December 2009," he told reporters on the sidelines of a seminar.

He also said the firm, the world's sixth-biggest steelmaker, will conclude expansion of its Jamshedpur plant by June-August 2011.

Tata Steel, which operates a quarter of its 30 million tonne annual capacity in India, is already working on raising domestic capacity to 10 million tonne from 6.8 million.