US Army Corps of Engineers
Engineer Research and Development Center Website

The Engineers at Vicksburg, Part 18: Bridging the Big Black River
Engineer Lt. Peter C. Haines, along with Lt. Francis Tunica, worked from midnight until dawn to construct a 200-foot bridge over the Black River. Haines would later design the original Washington, D.C., tidal basin, and was the only Civil War officer to serve on active duty in World War I.

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