Construction of the 265 km (165 mi)-long 5 ft 6 in (1,676 mm) broad gauge Siliguri–Jogihopa line, between 1963 and 1965, brought broad-gauge railways to Assam.

[2] Saraighat Bridge opened in 1962, initially carrying a metre-gauge track, which was later replaced by broad gauge.

[4] In the document on Vision 2020 – A Blue Print for Railway Electrification Programme, in the list of ongoing projects the entire route km (836) is shown as balance work as on 1 April 2010.

[6] Doubling of the track between New Bongaigaon and Kamakhya via Rangia was approved in the Railway Budget for 2013–14.

[8] The Carriage and Wagon Workshop is located about 2 km west of New Bongaigaon railway station.