 The original Japanese D51 steam locomotives were used by the Soviet Railways until 1979.Besides the main network run by the Russian Railways, until December 2006 the local oil company (Sakhalinmorneftegaz) operated a corporate narrow-gauge line extending for from Nogliki further north to Okha ().During the last years of its service, it gradually deteriorated; the service was terminated in December 2006, and the line was dismantled in 2007–2008.