The Norwegian State Railways (NSB) started construction in 1899 and the first part of the line, from Hell to Stjørdalshalsen, opened on 1 February 1902. The railway opened to Levanger on 29 October 1902, to Verdalsøra on 1 November 1904 and to Sunnan on 15 November 1905. Sunnan was chosen as terminus because of its location on the southern end of the lake of Snåsavatnet. The line was further extended to Snåsa in 1926, after which it has been classified as part of the Nordland Line. The railway is the most heavily trafficked non-electrified line in Norway, with the Trøndelag Commuter Rail running south of Steinkjer. It is also used by intercity passenger and freight trains.