tender for Dismantling of existing 48m span Bow String girder and superstructure spanning over running track, Provison of additional substructure alongwith foundation between running tracks, Supply, Fabrication, Launching of new Composite Girders along with other ancillary works for rehabilitation of railway portion of existing ROB at km 553/28-30 in Howrah end of Dehri On Sone Station of DDU Division