DRILLING, EXCAVATION, LOADING, TRANSPORTATION, DUMPING, SPREADING & LEVELLING, ETC., OF 516.968 LBCM OF IN-SITU OB (WHICH INCLUDES 2.337 LBCM OF TOP SOIL, 467.055 LBCM OF HARD OB & 47.576 LBCM OF COAL) AND EXCAVATION OF 9.532 LBCM OF OB (9.327 LBCM OF OB & 0.205 LBCM OF COAL) WITH RIPPER SHOVEL WITH CONVENTIONAL EQUIPMENT AND ADDITIONAL WORKS VIZ., 2000 SHOVEL HOURS, 2000 DOZER HOURS & 1,00,000 RMT OF DRILLING AT KISTARAM OPENCAST PROJECT, KOTHAGUDEM AREA DURING A PERIOD OF 36 MONTHS.