 In 1911 Rjukan Salpeterfabrikk was opened.The Tinnoset Line was opened in 1909 as a railway along with the Rjukan Line and the railway ferry service, and was the second railway line in Norway, after the Thamshavn Line, to be electrified in 1911.The railway service used the Telemark Canal until 1919 when the Bratsberg Line opened from Notodden to Skien.