DRILLING, EXCAVATION, LOADING, TRANSPORTATION, DUMPING, SPREADING & LEVELLING ETC., OF 2363.508 LBCM OF OVERBURDEN ( I.E. 2250.503 LBCM OF INSITU OB, 10.754 LBCM OF TOP SOIL, 42.890 LBCM OF SUB SOIL & 59.361 LBCM OF COAL) WITH HIRED HEMM IN COMBINATION WITH CONVENTIONAL EQUIPMENT AND 37.678 LCM OF REHANDLING OF LOOSE OB WITH CONVENTIONAL EQUIPMENT AND ADDITIONAL WORKS NAMELY 7000 SHOVEL HOURS, 7000 DOZER HOURS AT KHAIRAGURA OPENCAST PROJECT, BPA AREA DURING A PERIOD OF 84 MONTHS.