UP-GRADATION/REPLACEMENT OF BORDER SECURITY FENCE FROM PHASE-III TO MODULAR FENCE FROM BP NO. 2091/38-S TO BP NO. 2097/5-S (LENGTH 9.450) IN AOR OF 81 BN. BSF UNDER SECTOR HQ BSF GOKULNAGAR OF FRONTIER HQ BSF TRIPURA ALONG INDO BANGLADESH BORDER(IBB) SH: COMPREHENSIVE CONSULTANCY SERVICES FOR CONSTRUCTION OF RCC BOX TYPE CULVERT AND RCC RETAINING WALL INCLUDING SOIL INVESTIGATION, HYDROLOGICAL STUDY WITH HFL, TOPOGRAPHICAL SURVEY DESIGN AND DRAWING FOR UP-GRADATION/REPLACEMENT OF BORDER SECURITY FENCE FROM PHASE-III TO MODULAR FENCE FROM BP NO. 2091/38-S TO BP NO. 2097/5-S (LENGTH-9.450 ) IN AOR OF 81 BN BSF UNDER SECTOR HQ BSF GOKULNAGAR OF FRONTIER HQ BSF TRIPURA ALONG INDO BANGLADESH BORDER(IBB)