The constructions of the footings (Caissons) of the Eiffel tower. Construction began on 28th January 1887. The Caissons were needed on the ground nearest the Seine, which was softer and needed them to go 72 feet down to harder rock. The tower was completed on 31st March 1889.
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Keywords: building, caisson, caissons, construction, eiffel, footing, footings, foundation, foundations, france, gustave, paris, site, starting, tour, tower