The absorption of most of the existing railway between Manp'o and Unbong cut back the Unbong Line to a 3 kilometers stretch from the junction point with the new line, located at Sangp'unggang at the confluence of the Yalu and Samp'ung Rivers, to Unbong Station at the terminus of the old line, adjacent to the dam; this was transformed into a large freight-only yard, with Sinunbong Station handling primarily passenger traffic; the remaining section of the original 1959 line from Sangp'unggang to Kuunbong retained the "Unbong Line" name.