Explanation:

• Prime Minister of India, Shri Narendra Modi dedicated the historic Kosi Rail Mahasetu (Mega Bridge) of the Indian Railways to the nation through video-conference on 18 September 2020.

Kosi Rail Mega Bridge:

• The length of the rail bridge is 1.9 kilometres and has been constructed at the cost of Rs 516 crore.
• The project is of strategic importance along the India-Nepal border.
• The Kosi Rail Mahasetu will cut the otherwise 298-km long journey between Nirmali and Bhaptiahi (Saraigarh) on Indo-Nepal border to just 22 km.
• It will connect the Mitihila and Kosi region after a gap of 86-year. The rail link between the region was washed away during the heavy flood and severe Indo-Nepal earthquake in 1934, and thereafter due to the meandering nature of river Kosi no attempt was made to restore this rail link for a long period.