The Damodar Valley Corporation (DVC) has lined up an investment plan of Rs 1,000 crore in the next three years for modernisation of its existing plants at Bokaro, Durgapur and Chandrapura, said AK Barman, chairman, DVC.DVC has targeted a plant load factor of 85% by 2009-10, up from the existing 71%. The objective of the investment is to enhance the efficiency of the plants.