The Koch'am T'an'gwang Line, or Koch'am Colliery Line, is an electrified long freight-only railway line of the Korean State Railway in North Hamgyŏng Province, North Korea, from Myŏngch'ŏn on the P'yŏngra Line to Sinmyŏngch'ŏn and the Myŏngch'ŏn Coal Complex. History The line was originally opened around 1937 by the Chosen Government Railway. Route A yellow background in the "Distance" box indicates that section of the line is not electrified. References Railway lines in North Korea Standard gauge railways in North Korea