Consultancy Services For Structural Design Of Steel Bridge Of (3x30 Mtr) Span With 2 (Two) Nos. Sentry Post At Both End And Drop Gates Over Tributary Of Nagar River (Gin 192) Near Bp. No. 358/2 R Under Aor Of Bop Kakarmani Of 72 Bn Bsf Along The Alignment Of Indo Bangladesh Border Road In Uttar Dinajpur District Of West Bengal.