Drilling, excavation, loading, transportation, dumping, spreading and levelling, etc., of 219.120 lbcm of in-situ ob (which includes 185.745 lbcm of hard ob, 33.375 lbcm of coal), and re-handling of 7.550 lcm of top soil with conventional equipment, and additional works viz., 4000 shovel hours, 2000 dozer hours and 50,000 rmt of drilling at kistaram opencast project, sathupally area during a period of 24 months.