Okgu Line () is a cargo branch line from Gunsan Port Line, connecting from GunsanOksan station to Okgu station. Okgu line is registered in distance post, but suspended as cargo or passenger transportation several years ago This line was virtually closed status, but April 1, 2011, resumed cargo transport.
Okgu line was supply railway for United Nations peacekeeping(Seventh Air Force) in Gunsan Airfield. May 20, 1952, construction of Okgu line began by UN army, and finished construction at February 25, 1953. Operation of Okgu line started March 9. Okgu line also did the corn transport to Gunsan Port.
For some time, bidulgiho was operated in line, 6 times per day. But passenger transportation was suspended in 1990s. And cargo transportation also suspended in 2000. In 2011, Haiman(Company that responsibility for Airfield supply) requested train operation, so cargo train occasionally operating for now.
Original name at line open was Gunsan Airfield Line(, 群山é£Âè¡Âå ´ç·Â), but name changed to Okgu line at September 1, 1955.