Consultancy Services For Authoritys Engineer For Supervision Of “Construction And Upgradation Of Existing Road On Nh-510 Between Rabangla To Gyalshing To 2-Lane With Paved Shoulder Configuration In The State Of Sikkim Under Sardpne Phase ‘A’ On Epc Mode For (I) Design Chainage Km 32.500 To Km 33.600 (Packageiii), (Ii) Design Chainage Km 33.600 To Km 58.840 Km (Package Iv), (Iii) Design Chainage Km 58.840 To Km 75.000 Km (Package V)And(Iv) Design Chainage Km 75.000 To Km 90.210 Km (Package Vi)