Construction/Improvement of existing CL-9 road to NHDL specification with paved shoulder from design chainage km 0.00 (Zadong) to km 6.880 (net length 6.880 km) on road Zadong-Donkyala-Kerang (NH 310 A) in the State of Sikkim under Project Swastik Construction / Improvement of existing CL-9 road to NHDL specification with paved shoulder from design chainage km 0.00 (Zadong) to km 6.880 (net length 6.880 km) on road Zadong-Donkyala-Kerang (NH 310 A) in the State of Sikkim under Project Swastik