Bengal & North Western main line was a
metre gauge line consisting of the following sections: • Sonepur to Mankapur () opened 15 January 1885 • Mankapur to Gonda () opened 2 April 1884 • Gonda to Colonelganj () opened (29 October 1891) 1 February 1892 • Colonelganj to Jarwal Road () opened 1 February 1892 • Jarwal Road to Bahramghat () (including
Elgin Bridge) opened 18 December 1896 • Bahramghat to Burhwal () opened 24 November 1896 • Burwhal to Barabanki (broad gauge: ) opened 1 April 1872 • Burhwal to Barabanki (broad to mixed gauge) converted 24 November 1896 • Burhwal to Barabanki (mixed to metre gauge) converted around 1943 • Dighwara-Goldingganj diversion () opened around 1960 • Barabanki to Chhapra (metre to broad gauge) converted 1981 • Chhapra Kacheri to Dighwara (metre to broad gauge: ) converted autumn 2006 ==Bengal & North Western Railway Loop line==