How the Netherlands Built the Impossible 9 km Barrier That Lets the Sea In

Oosterscheldekering construction: 9 kilometers of storm surge barrier built to stay open, standing on 65 concrete piers of 18,000 metric tons each, completed in 1986. In November 1974 the Dutch parliament rejected a finished, funded, partly built solid dam by 75 votes to 67, with the government pledged to resign if it passed. The replacement design required 132 prefabricated foundation mattresses, 700,000 square meters of engineered geotextile and 5 million tons of imported rock. This documentary covers the full engineering and construction process from seabed compaction to the closing protocol, including the December 2023 storm that closed all six Dutch surge barriers at the same time for the first time. What's in this video: Why a sealed estuary would have killed every oyster bed at Yerseke and how that changed a national plan How the vessel Mytilus densified 15 meters of loose seabed sand to stop it from liquefying How a 18,000-ton pier was lifted by a ship rated for only 10,000 tons Why the gates are stiffened with tubes instead of beams, and what breaking waves do to trapped air Subscribe to FRONTIER MEGABUILDS to understand the machines, decisions and engineering behind the projects built at the edge of possible. #Oosterscheldekering #Megaprojects #HowItsMade #Netherlands #DeltaWorks #Engineering #CoastalEngineering #Construction #StormSurgeBarrier #DutchEngineering #Liquefaction #FullProcess #Aviation #Trending IMPORTANT: ABOUT THIS VIDEO ------------------------------------------------------------------- This is an educational documentary analyzing the engineering and construction of public infrastructure, based entirely on open-source information. All visuals and animations are 100% synthetic, AI-generated conceptual representations. No real footage of the construction sites or personnel was used. This video is purely informational and intended for educational purposes only.