Elgin Bridge is a 3695 m long important railway bridge across the Ghaghra River located in Barabanki district. The bridge falls on the Barabanki-Gonda section of the North Eastern Railway zone of Indian Railways. The bridge is about 73 km from Lucknow and stands at periodically changing confluence of two rivers i.e. Sharda River and Ghaghara River. The bridge was built on dry land and then the river was trained under it.