James Chatham Duane
James Chatham Duane was an engineering officer in the Union Army during the American Civil War, being the Chief Engineer of the Army of the Potomac.
Duane was born in Schenectady, New York. His grandfather James Duane was a member of the Continental Congress and mayor of New York City. Duane graduated from Union College in 1844, where he was a founding member of Chi Psi fraternity, and from the United States Military Academy in 1848, where he ranked third in his class. He taught practical military engineering there from 185254 during the superintendency of Robert E. Lee. Serving with the Armys company of sappers, miners, and pontoniers for nine years before the American Civil War, he led the engineers on a 1,100mile march on the Utah Expedition in 1858 and commanded select engineer troops to guard President Abraham Lincoln at his inauguration in 1861.
Source: Wikipedia