CONSULTANCY SERVICES FOR AUTHORITY’S ENGINEER FOR SUPERVISION OF CONSTRUCTION AND UPGRADATION OF EXISTING ROAD ON NH-510 BETTWEEN RABANGLA TO GYALSHING TO 2-LANE WITH PAVED SHOULDER CONFIGURATION IN THE STATE OF SIKKIM UNDER SARDP-NE PHASE ‘A’ ON EPC MODE: (1) KM 32.500 TO KM 33.600 (PACKAGE-III) (2) KM 33.600 TO KM 58.840 (PACKAGE-IV) (3) KM 58.840 TO KM 75.00 (PACKAGE-V) (4) KM 75.000 TO KM 90.210 (PACKAGE-VI)