The P'yŏngnam Line was originally built as two separate lines by two separate railway companies - the '''P'yŏngnam Line'
built by the Chosen Government Railway (Sentetsu
), and the 'Onch'ŏn Line''' built by the privately owned
Chosen P'yŏngan Railway.
P'yŏngnam Line, 1909–1945 In September 1909, Sentetsu began construction of a rail line running between
P'yŏngyang and
Chinnamp'o (nowadays Namp'o). but a year later was dismantled and moved south, becoming today's
Ch'ilgol Station; Taep'o Station, from P'yŏngyang Station between Choch'on and Taep'yŏng Stations in
Man'gyŏngdae-guyŏk, P'yŏngyang, was opened on 10 January 1944 and subsequently closed; and
Pot'onggang Station on 21 March 1944.
Onch'ŏn Line, 1938–1945 On 8 July 1938, the Chosen P'yŏngan Railway opened the '''Onch'ŏn Line''' from
Chinnamp'o, terminus of Sentetsu's P'yŏngnam Line, to
Ryonggang Onch'ŏn,
Since 1945 After the partition of Korea, the two lines were within the
Soviet zone of occupation, and both lines - together with all others within the Soviet zone - were nationalised by the
Provisional People’s Committee for North Korea on 10 August 1946, and operated by the
Korean State Railway following the establishment of the DPRK, which merged the Onch'ŏn Line into the P'yŏngnam Line. The line was heavily damaged during the
Korean War, but was subsequently rebuilt and expanded, with the construction of
Sinnamp'o Station to serve glass factories and shipbuilders located there. The mainline between P'yŏngyang and Namp'o was electrified in December 1979. After the completion of the
West Sea Barrage in 1986, a new rail line, the
Sŏhae Kammun Line was opened, running from
Sillyŏngri on the P'yŏngnam Line to
Ch'ŏlgwang on the
Ŭnnyul Line. ==Modernisation==