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Naval History and Heritage Command

Naval History and Heritage Command

Miracle Harbor 2

Image of some caissons under construction in British yards.
Description: 2. The parts of the "MULBERRY" harbors were all built in Britain. The job kept 20,000 British workers working at top speed; 865,000 tons of reinforced concrete had to be cast in six months. Above are shown some caissons under construction in British yards.
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