Erection, extn, diversion of 6.6kV OHL req. for supplying power to 6.6kV rated Excavators DHD 18211 and 18212 for its operation and advancement of working faces at Q.No. 01, dismantling of 6.6 kV OHL from old working face/patch at Q.No. 01 under PND (Tender №90183363)