Denver, Colorado. Workers giving ship steel a thorough rinsing after it has been "pickled" in the highest steel "pickling" vat in the world. The "pickling" operation, giving steel a sulphuric bath to remove mill scale, is a common sight at Seaboard Shipyards, and is something unique at the mile-high Denver fabricating plant and an illustration of American industrial ingenuity. Sourced from the Library of Congress.
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