The section from Wallerawang to Capertee was opened on 15 May 1882; the section from Capertee to Rylstone on 9 June 1884; the section from Rylstone to Mudgee on 10 September 1884; the section from Mudgee to Gulgong on 14 April 1909; the section from Gulgong to Dunedoo on 28 November 1910; the section from Dunedoo to Binnaway on 2 April 1917; the section from Binnaway to Coonabarabran on 11 June 1917; and the section from Coonabarabran to Gwabegar on 10 September 1923.