Requirement :
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Construction of sub-structure and super-structure on pile foundation of major bridges: bridge no. 501 (3x12.2m psc slab), 502 (2x61.0m+1x45.7m owg, excluding super structure), 502a (9x12.2m psc slab) and 504 (3x6.1m psc slab), 505 (2x12.2m+9.15m psc slab), 506 (3x6.1m psc slab), 507 (2x12.2m psc slab), 508 (5x12.2m psc slab), 509 (2x12.2m psc slab), 509a (3x6.1m psc slab), 510 (3x18.3m composite girder), 510a (3x6.1m psc slab),511 (8x6.1m psc slab) with psc girder launching and casting = total 13 nos bridges including protection works etc. in between station nalbari to rangiya km 345/4-5 to km 359/7-8 in connection with double line work of new bongaigaon- agthori doubling project.
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