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This bank was at a meander that was to be stopped before it took out the playing field for an elementary school. Please remember this picture. This school class is passing through a double row of steel structures called Jacks for the three steel angle bars bonded at their centers. The steel angles are strung with many wires as a web, and they are linked as a chain by heavy cables. After World War II, a Mr. Kellner promoted them for beach erosion and then bank protection.