Satellite images reveal flooded rail line in Ryanggang province
I analyzed high-resolution satellite imagery of Paekam county, in North Korea’s Ryanggang province, and found that a hydroelectric dam has flooded part of a major North Korea railway line. North Korea responded by building a rerouted track and relocating two train stations to hig
I analyzed high-resolution satellite imagery of Paekam county, in North Korea’s Ryanggang province, and found that a hydroelectric dam has flooded part of a major North Korea railway line. North Korea responded by building a rerouted track and relocating two train stations to higher ground, according to imagery reviewed in 2026. The images show that the Mount Paektu Hero Youth Dam No.
1 created Lake Sodusu, an artificial reservoir spanning roughly 800 hectares. That is about 2.8 times the size of Yeouido, an island in Seoul often used as a size reference in South Korea.
The rising water submerged a 15 kilometer stretch of the Paekmu Line. This narrow gauge railway connects Paekam Cheongnyon Station in Ryanggang province to Musan Station in North Hamgyong province and is used mainly to move iron ore and timber. Two stations along that stretch, Samsa and Sangdan, were also submerged and closed.
To keep trains running, North Korea built a new bypass line. The route climbs along steep mountain slopes and higher ground west of the flooded valley, avoiding the water below. Samsa Station was relocated about 2.
7 kilometers to the west. Sangdan Station was moved only about 200 meters up a nearby slope, reflecting the different terrain each site required. North Korea has poured significant cost and labor into rebuilding rail access through this flooded mountain region.
Its logistics system depends heavily on trains. Poor road conditions and an underdeveloped trucking network mean the country relies on rail to move heavy, bulky goods such as coal, ore and cement over long distances. Rail is estimated to carry about 90% of North Korea’s freight.
That heavy reliance does not mean the rail network is in good condition. Aging tracks and frequent power outages often keep trains from running at full speed. Some sections reportedly move no faster than South Korea’s old slow trains once did.
Still, North Korea chose to cut through mountainous terrain to restore this route. Losing the
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