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The line formerly continued from Hwŏnhwa to past the site of the T'aech'ŏn nuclear reactor, but that section was abandoned after construction of the reactor was halted in 1994; the line had also continued further on to Map'yŏng to assist with the construction of the large Taech'ŏn No. 2 Hydroelectric Power Station further up the Taeryŏng River.
Route
A yellow background in the "Distance" box indicates that section of the line is not electrified.