Captain Richard Delafield, while superintendent of repair work on the Cumberland Road [east of the Ohio River], designed and built the first cast-iron tubular-arch bridge in the United States, the Dunlap's Creek Bridge.
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Painting of Captain Richard Delafield, head and shoulders, in uniform.

Credit: Courtesy of the United States Military Academy, Special Collections and Archives

Captain Richard Delafield, c. 1855-1870, by Henry Peters Gray.

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