Replacement of corroded/pitted/perforated members of bridge No. 78 UP (1 x 8 x 76.2 m) including provision of special type X-Girder protection screen at Br. No. 78 UP & DN (2 x 8 x 76.2 m), 10 (1 x 15 x 61.0 m) and 16 DN (1 x 7 x 30.5 m) under SSE/