DRILLING, EXCAVATION, LOADING, TRANSPORTATION, DUMPING, SPREADING and LEVELLING, ETC., OF 673.56 LBCM OF IN-SITU OB (WHICH INCLUDES 5.60 LBCM OF TOP SOIL, 657.02 LBCM OF HARD OB and 10.94 LBCM OF COAL) WITH CONVENTIONAL EQUIPMENT, AND ADDITIONAL WORKS VIZ., 1500 SHOVEL HOURS, 1500 DOZER HOURS and 1,10,000 RMT OF DRILLING AT RG OC-II EXTENSION PROJECT, RG-III AREA DURING A PERIOD OF 36 MONTHS.