Consultancy Services for Preparation of Detailed Project Report for Construction of Major Bridge along with its approaches connecting NH-10 with NH-510 near Singtam, development of its junction and identification & realignment from Km 0+000 to Km 3+074 (Singtam-Tarku) on NH-510 into 2 lane with paved shoulder configuration along with permanent mitigation measures for landslide/sinking/slip zones on existing section in the State of Sikkim