The middle of the Seosan seawall was closed with a single ship because rock could not stop water pouring through at 8 meters per second

How we checked

Checked on October 3, 2026. We compared the video against the originals of the National Museum of Korean Contemporary History's Modern and Contemporary History Archive, "Sites of Contemporary History – Seosan Reclaimed Land" (현대사 현장 – 서산 간척지); the Korea Tourism Organization's VisitKorea Korean site (대한민국 구석구석), "Seosan District A Seawall"; the government-produced 1984 Daehan News No. 1478, "Reclamation Work Site" (description text of the official video on the KTV archive); and the Digital Seosan Culture Encyclopedia compiled by the Academy of Korean Studies. Where the ship came from and its tonnage (sentences 18 and 19) are confirmed through the record the builder, Hyundai E&C, published in its own newsroom, and the other value for the seawall's length through the same company's magazine. Of the materials used to join the dike, only the single word "earth" (sentence 22) is absent from institutional originals and was confirmed through news reports (△). "The narrower the gap became, the faster the current ran" and "The more they blocked, the harder the water rushed out" are not figures from the originals but explanations that the same water passes through a narrower gap, so they are marked as "interpretation."

• We could not transcribe the Daehan News narration, and confirmed it through the summary description KTV archive attached to the video.
• For the remaining channel and the current, the Daehan News (produced March 2, 1984) gives 270 meters and 8 meters per second, while the Digital Seosan Culture Encyclopedia gives 260 meters and 8.2 meters per second; the video used the Daehan News values, as the record from the time.
• The length of the Seosan District A seawall differs between 6,458 meters (Korea Tourism Organization, Digital Seosan Culture Encyclopedia, Hyundai E&C newsroom) and 6,476 meters (Hyundai E&C company magazine), so the video says "about 6.5 kilometers."
• For the cost and time saved, the Daehan News of the time ("a month and a half, more than 400 million won") and later news reports ("28 billion to 29 billion won, 36 months") differ by orders of magnitude, so the video gives only the record from the time, as "the Daehan News reported."
• We could not find an institutional original on whether the ship was actually broken up for scrap in Incheon, so the video says "the plan was." The ship's name and length also differ between news reports, so the video does not mention them.
• We do not list personal names or street addresses.