Drilling, Excavation, Loading, Transportation, Dumping, Spreading And Levelling, Etc., Of 1107.353 Lbcm Of In-Situ Ob (Which Includes 10.145 Lbcm Of Top Soil, 1039.483 Lbcm Of Hard Ob And 57.725 Lbcm Of Coal) With Conventional Equipment, And Additional Works Viz., 20000 Shovel Hours, 20000 Dozer Hours And 80,000 Rmt Of Drilling At Ramagundam Opencast Mine-I, Rg-Iii Area During A Period Of 48 Months.