DRILLING, EXCAVATION, LOADING, TRANSPORTATION, DUMPING, SPREADING & LEVELLING ETC., OF 1148.556 LBCM OF IN-SITU OB (WHICH INCLUDES 1080.352 LBCM HARD OB, 3.535 LBCM TOP SOIL, 3.534 LBCM SUB SOIL & 61.135 LBCM COAL) AND RE-HANDLING OF 38.290 LCM LOOSE OB & TOP SOIL WITH CONVENTIONAL EQUIPMENT AND EXTRACTION OF 50.154 LBCM COAL/SHALE WITH SURFACE MINER INCLUDING CUTTING, LOADING, TRANSPORTATION, DUMPING, ETC., AND ADDITIONAL WORKS VIZ., 1500 SHOVEL HOURS, 1500 DOZER HOURS & 2,25,000 RMT DRILLING AT PRAKASHAM KHANI OPENCAST PROJECT (OC-IV SECTION), MNG AREA DURING A PERIOD OF 48 MONTHS.