20 firms shortlisted for implementation of Nirsa flyover in Barwa Adda-Panagarh Section of NH-19 in West Bengal. March 17, 2025 | Project Bidders, Project Updates A total of 20 firms have been shortlisted as technically qualified for implementation of Nirsa Six Lane Elevated Flyover Project (Barwa Adda-Panagarh Section) (NH-19). This content is restricted.